Slika 3: HPTLC in HPTLC-MS analize B-tipa proantocianidinov rizomov češkega (A) in sahalinskega (B) dresnika.
Figure 3. HPTLC and HPTLC-MS analyses of B-type proanthocyanidins from rhizomes of Bohemian (A) and giant (B) knotweed.
Slika 4: Določanje antioksidativnega delovanja 70% etanolnega(aq) ekstrakta lubja korenik japonskega dresnika glede na sposobnost lovljenja stabilnega prostega radikala 2,2-difenil-1-pikril-hidrazila (DPPH) z merjenjem absorbance pri 517 nm. Določili smo močno antioksidativno delovanje ekstrakta (IC50 = 3,5 µg/mL) in z on-line DPPH testom izvedli vodeno frakcionacijo ekstrakta (SEC-HPLC-DPPH-UV/Vis). V najbolj antioksidativni frakciji smo identificirali (–)-epikatehin.
Figure 4. Determination of the antioxidant activity of the 70% ethanolic(aq) extract of Japanese knotweed rhizome bark in terms of its ability to capture the stable free radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH) by measuring the absorbance at 517 nm. A strong antioxidant activity of the extract (IC50 = 3.5 µg/mL) was determined and an on-line DPPH guided fractionation (SEC-HPLC-DPPH-UV/Vis) of the extract was carried out to identify (–)-epicatechin in the most potent antioxidant fraction.
Bibliografija Bibliography
Raziskovalci / Researchers:
dr. Alen Albreht dr. Vesna Glavnik dr. Mitja Križman dr. Katerina Naumoska
Doktorski študenti / PhD Students:
Urška Jug
Valentina Metličar Anja Prešern Jure Zekič
Strokovni sodelavci in tehnično osebje / Technical Staff:
Tinka Palkovič Mateja Puklavec Jana Stanič Andreja Starc
14 izvirnih znanstvenih člankov Original Scientific Articles
1 objavljeni znanstveni prispevek na konferenci Published Scientific Conference Contribution 3 objavljeni povzetki znanstvenih prispevkov
na konferencah
Published Scientific Conference Contribution Abstracts
5 uredništev revij Journal Editorships
Odsek za polimerno
kemijo in tehnologijo Department of
Polymer Chemistry and Technology
D07
Polimeri in polimerni materiali s posebnimi lastnostmi – sinteza, karakterizacija, uporaba, reciklaža in okoljski odtis plastičnih materialov
Ključne dejavnosti
• razvoj novih metodologij in pristopov h kontro-liranim polimerizacijam za pripravo komple-ksnih (ko)polimerov za specifične aplikacije;
• materiali s permanentno porozno strukturo;
• funkcionalizacija površin nanopolnil in pripra-va polimernih nanokompozitov;
• reciklaža polimerov in polimernih materialov;
• razvoj novih metod in pristopov za celostno karakterizacijo kompleksnih polimerov in supramolekularnih struktur;
• vpliv polimerov in plastičnih materialov na okolje;
• razvojno industrijske raziskave.
Glavni dosežki v letu 2020
Na področju reciklaže polimerov smo razvili hit-ro, robustno in priročno metodo za kvantitativno določanje PA6 in PA66 poliamidov (PA) v plastič-nih odpadkih (ACS Sustainable Chem. Eng., 2020, 8, 11818). Te informacije so bistvene za kemijsko reciklažo odpadkov, saj vsebnost PA v odpadku določa njegovo ceno in primernost odpadka kot
Speciality polymers and polymeric materials -
synthesis, characterisation, application, recycling, and environmental footprint of plastic materials
Topic areas
• Development of new methodologies and ap-proaches for controlled polymerisation of complex (co)polymers for specific applications;
• Materials with permanent porous structure;
• Functionalisation of nanoparticles and prepa-ration of polymer nanocomposites;
• Recycling of polymers and polymeric materials;
• Development of new methods and approaches for a detailed characterisation of complex polymers and supramolecular structures;
• The impact of polymers and plastics on the environment;
• Industrial development research.
Important achievements in 2020
In the field of polymer recycling, we developed a rapid, robust and convenient method for the quantitative determination of PA6 and PA66 poly-amides (PA) in plastic waste (ACS Sustainable Chem. Eng. 2020, 8, 11818). Information on the content of a particular PA type in plastic waste is important as it determines the maximum
re-Vodja / Head:
dr. Ema Žagar
surovine. Poročali smo tudi o učinkovitem (nekaj-minutnem) kemijskem recikliranju alifatskih po-liamidov s pomočjo mikrovalov (ACS Sustainable Chem, 2020, 8, 16274). Opisan postopek kemijske reciklaže poliamidov je enostaven in učinkovit, saj alifatske PA lahko v celoti pretvorimo v njihove sestavne monomere brez prisotnih stranskih re-akcij, kar bistveno poenostavi izolacijo in čiščenje tako pridobljenih monomerov kot tudi ojačevalnih dodatkov v primeru kompozitov. Tako pridobljene sekundarne surovine za izdelavo PA so primerljive kakovosti komercialno dostopnim kemikalijam.
Dosežki na področju materialov s permanen-tno poroznostjo vključujejo razvoj inovativne metode za pripravo emulzijsko templatiranih makroporoznih polipeptidnih ogrodij, primernih za namene tkivnega inženiringa (Polym. Chem., 2020, 11, 4260). Takšna ogrodja so bila prip-ravljena s polimerizacijo z odpiranjem obroča N-karboksianhidridov neposredno v olju v emu-lzijah z visokim deležem interne faze (HIPE),
covery of PA constituent monomer(s) by chemi-cal recycling and consequently the suitability of the waste as a raw material. An efficient (several minutes) microwave-assisted chemical recycling process of aliphatic polyamides is reported in ACS Sustainable Chem. Eng. 2020, 8, 16274. It results in a complete and straightforward conversion of PA into the constituent monomers, simplifying the isolation and purification of monomers and rein-forcing additives in the case of PA-based compos-ites. The secondary raw materials thus obtained are of comparable quality to commercially avail-able chemicals.
Achievements in the field of materials with per-manent porosity include development of a novel method for the preparation of emulsion-templated macroporous polypeptide scaffolds suitable for tis-sue engineering purposes (Polym. Chem. 2020, 11, 4260). The scaffolds were prepared by ring-opening polymerisation of N-carboxyanhydrides directly in oil-in-oil high internal phase emulsions (HIPE),
Slika 1: Depolimerizacijo poliamidov s pomočjo mikrovalov smo uporabili za: A) določitev vsebnosti PA6 in PA66 v odpadkih in B) kot reciklažno metodo za pridobivanje monomerov visoke čistosti iz PA66 in dolgoverižnih PA z visokimi izkoristki.
Figure 1. Microwave-assisted polyamide depolymerisation was used: A) to determine PA6 and PA66 in real wastes and B) as a recycling method to recover the PA constituent monomers in high purity and yield.
kjer smo uspešno rešili več problemov, poveza-nih s sintezo (fazna separacija, penjenje). Poli-peptidna ogrodja z makroporozno strukturo so primerna za rast celic. Za učinkovito in selektiv-no zajemanje CO2 smo s pomočjo emulzijskega templatiranja sintetizirali hierarhično struktu-rirani porozni karbonski nanokompozit z vgra-jenimi zeolitnimi nanokristali, pripravlvgra-jenimi na Odseku D09 (ChemSusChem, 2020, 13, 2089). Za namene čiščenja vod pa smo pripravili amfoter-ne polielektrolitamfoter-ne monolite. Kopolimerni in me-šani amfoterni polielektroliti kažejo antipolielek-trolitsko obnašanje, medtem ko tisti z dvoplastno strukturo kaže značilno polielektrolitsko obna-šanje (J. Colloid Interface Sci., 2020, 575, 480).
Uporaba nanoceluloze za pripravo polimernih kompozitov z izboljšanimi lastnostmi vključuje površinsko modifikacijo celuloznih nanokrista-lov (CNC) s silanskim modifikatorjem, da izbolj-šamo kompatibilnost CNC z linearnim polietile-nom nizke gostote (LLDPE). Kompozit LLDPE, ojačen z 1–2 ut% CNC, kaže 20-odstotno čanje elastičnega modula in 30-odstotno pove-čanje natezne trdnosti kompozita v primerjavi s čistim LLDPE (Celuloza, 2020, 27, 5785).
where we successfully solved several problems associated with the synthesis (phase separation, foaming). The scaffolds were found to be excellent for cell proliferation. For the purpose of efficient and selective CO2 capture, we synthesised a hierarchi-cally structured porous carbon nanocomposite by an emulsion-template strategy, in which zeolite nanocrystals, prepared in the D09 Department, are embedded in the walls of microcellular carbon foams (ChemSusChem 2020, 13, 2089). We also prepared amphoteric polyelectrolyte monoliths for water treatment applications. The co- and mixed-structured amphoteric polyelectrolytes show anti-polyelectrolyte behaviour, while the one with a bi-layer structure behaves like a typical polyelectrolyte (J. Colloid Interface Sci. 2020, 575, 480).
The use of nanocelluse to prepare polymer-based composites with improved properties involves the surface modification of cellulose nanocrystals (CNCs) with a silane modifier to achieve better compatibility of the CNCs with the linear low-den-sity poly(ethylene) (LLDPE) matrix. Addition of 1-2 wt% of CNCs to LLDPE resulted in a 20% increase in elastic modulus and a 30% increase in tensile strength of the composite compared to neat LLDPE (Cellulose 2020, 27, 5785).
Slika 2: Makroporozna polipeptidna ogrodja, pripravljena s polimerizacijo z odpiranjem obroča v emulziji z visokim deležem interne faze. Penjenju in fazni separaciji smo se izognili s kontroliranjem reakcijskih pogojev.
Figure 2. Macroporous polypeptide scaffolds were prepared by ring-opening polymerisation in a high internal phase emulsion under conditions where phase separation and foaming were overcome by controlling the reaction conditions.
Slika 3: Karbonski nanokompoziti z vgrajenimi zeolitnimi nanokristali za zajemanje CO2.
Figure 3. Composite of zeolite nanocrystals embedded in microcellular carbon foam for CO2 capture.
Slika 4: Visoko porozni poliamfolitni hidroge-li, pripravljeni z istoča-sno polimerizacijo dveh emulzij z visokim dele-žem notranje faze. Razi-skali smo vpliv različnih struktur na kinetiko ad-sorpcije barvil iz vodne mešanice barvil.
Figure 4. Highly porous polyampholytic hydro-gels prepared by simul-taneous polymerisa-tion of two high internal phase emulsions. The influence of different structures on the ad-sorption kinetics of dyes from a dye mixture was investigated.
Raziskovalci / Researchers:
dr. Alojz Anžlovar dr. Ana Drinčič dr. Špela Gradišar dr. Sebastijan Kovačič dr. Andrej Kržan dr. Matjaž Kunaver dr. Ozgun Can Onder dr. Ana Oreški dr. David Pahovnik dr. Simona Sitar
Doktorski študenti / PhD Students:
Vaibhav Budhiraja Urška Češarek Maja Grdadolnik Sarah Jurjevec
Tomaž Kotnik Petra Utroša Blaž Zdovc Petra Utroša Blaž Zdovc
Strokovni sodelavci in tehnično osebje / Technical Staff:
Nataša Juvančič Kaja Kušar Andreja Pogačar Polona Prosen Mirjana Širca Mojca Trkaj Jasmina Turnšek
Bibliografija Bibliography
11 izvirnih znanstvenih člankov Original Scientific Articles 1 pregledni znanstveni članek Review Article
1 objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje)
Published Scientific Conference Contribution Abstract (Invited Lecture) 2 objavljena povzetka znanstvenih
prispevkov na konferencah
Published Scientific Conference Contribution Abstracts
1 diploma Undergraduate Thesis
1 magisterij Master's Thesis
7 uredništev revij Journal Editorships
D09
Odsek za anorgansko
kemijo in tehnologijo Department of
Inorganic Chemistry and Technology
Načrtovanje in razvoj
funkcionaliziranih anorganskih katalizatorjev in adsorbentov za aktualne energijske in okoljske aplikacije
Ključne dejavnosti
• razvoj funkcionaliziranih zeolitov, poroznih oksidov in kovinsko-organskih poroznih ma-terialov (MOF-ov) za adsorpcijo in katalizo;
• poglobljene raziskave o povezavi med zgradbo materialov in njihovimi lastnostmi (raziskave do stopnje »proof of concept« za uporabo pri čiščenju vode in zraka, shranjevanju toplote ter zajemu in pretvorbah CO2 in ogljikovodikov);
• razvoj in uporaba metod za karakterizacijo materialov med njihovim delovanjem (in situ in operando pristopi).
Glavni dosežki v letu 2020
Sinteza biarilov z oksidacijo je stroškovno učinko-vita, vendar je bila doslej tehnološko manj zani-miva zaradi nizke regioselektivnosti in slabe sta-bilnosti homogenega paladijevega katalizatorja, ki se običajno uporablja v sintezi. S sodelavci iz Leuvna, Ghenta in Rostova smo z NMR meritvami pokazali, da umestitev paladijevih kationov v pore zeolita omogoča selektivno aktivacijo C-H vezi, pri
Design and development of functionalised inorganic catalysts and adsorbents for energy and environmental applications.
Topic areas
• development of functionalised zeolites, po-rous oxides and metal-organic frameworks (MOFs) for adsorption and catalysis,
• in-depth research of structure-property rela-tionship (research to the degree of "proof of concept" for use in waste-water and air treat-ment, heat storage and capture and conver-sion of CO2 and hydrocarbons),
• the development and use of methods for the characterisation of materials during their operation (in-situ and operando approaches).
Important achievements in 2020
Oxidative coupling of simple aromatics allows for a cost-effective synthesis of biaryls. However, utili-sation of this technology is severely hampered by poor regioselectivity and by the limited stability of state-of-the-art homogeneous Pd catalysts. By us-ing NMR spectroscopy, we showed, together with co-workers from Leuven, Ghent and Rostov, that confinement of cationic Pd in the pores of a zeolite
Vodja / Head:
prof. dr. Nataša Zabukovec Logar
enables selective activation of C-H bonds, where selectivity is determined by the shape of the zeolite pores. The work was published in Nature Catalysis.
We also used NMR spectroscopy in a study that showed that a microporous zeolite Beta, in its all-silica form, shows outstanding capac-ity and affincapac-ity for the uptake of perfluorinated compounds. The article was published in Ange-wandte Chemie (Figure 1).
Slika 1: Zeolit Beta je v čisti silikatni obliki najobetav-nejši kandidat za boj proti onesnaženju s perfluori-ranimi spojinami. Učinko-vito in selektivno zajema perfluorirane kisline tudi v prisotnosti drugih organ-skih spojin.
Figure 1: Zeolite Beta, in its all-silica form, is the leading candidate for com-bating PFCs pollution. It ef-ficiently and selectively ad-sorbs perfluorinated acids even in the presence of other organic compounds.
čemer je selektivnost odvisna zgolj od oblike por izbranega zeolita. Članek je bil objavljen v reviji Nature Catalysis.
Z NMR meritvami smo sodelovali tudi v raziska-vi, ki je pokazala, da je zeolit Beta v čisti silikatni obliki najobetavnejši kandidat za boj proti onesna-ženju s perfluoriranimi spojinami. Članek je bil objavljen v reviji Angewandte Chemie (Slika 1).
Volatile organic compounds (VOCs) represent the main class of air pollutants of a toxic and car-cinogenic nature. We found out that the promo-tion of catalytic oxidapromo-tion of toluene as a model VOC is due to the synergistic redox effect between CuO nanocrystals and finely dispersed Cu-oxo-Fe clusters on mesoporous silica with defined Fe/Cu molar ratio. The article was published in Applied Catalysis B Environmental (Figure 2).
Structural differences between CeO2 and CeZrO2 supports as well as nickel nanoparticles were performed by several in-situ characteri-sation techniques to pinpoint the origin and role of zirconium in improving catalytic activity, hy-drogen selectivity and catalyst stability in the methane dry reforming reaction. The article is published in ACS Catalysis (Figure 3).
In regard to the development of a micro-chan-nel reactor system to study low-temperature dry reforming of methane, we cooperated with colleagues from the Faculty of Chemistry and Chemical Technology, University of Ljubljana.
The results of the computations are well com-pared with experiments in two geometries, i.e., a conventional fixed-bed reactor and a between-two-plates micro-channel fixed-bed
Slika 2: Sinergijski efekt kom-pozitnega katalizatorja iz CuO nanokristalov in Cu-oxo-Fe klastrov na mezoporoznem si-likatnem nosilcu pri katalitski oksidaciji toluena kot model-nega lahkohlapmodel-nega onesna-žila v zraku.
Figure 2: Synergistic effect of composite catalyst from CuO nanocrystals and Cu-oxo-Fe clusters on mesoporous silika support in catalytic oxidation of toluene as a model volatile or-ganic air pollutant.
Lahkohlapne organske spojine (VOC – Vola-tile Organic Compounds predstavljajo glavno skupino toksičnih in karcenogenih onesnažil v zraku. V objavi poročamo, da je izboljšana katalitska oksidacija toluena kot modelnega VOCa posledica sinergijskega redoks učinka med CuO nanokristali in fino dispergiranimi Cu-okso-Fe skupki na mezoporoznem silikat-nem nosilcu z definiranim Fe/Cu molskim raz-merjem. Članek je bil objavljen v reviji Applied Catalysis B Environmental (Slika 2).
Strukturne razlike med CeO2 in CeZrO2 oksi-doma ter nikljevimi nanodelci so bile analizi-rane z in situ karakterizacijskimi tehnikami z namenom identificirati vlogo cirkonija na izbolj-šano katalitsko aktivnost, selektivnost za vodik in katalitsko stabilnost v reakciji suhega refor-minga metana. Članek je bil objavljen v reviji ACS Catalysis (Slika 3).
Pri razvoju mikrokanalnega reaktorskega sis-tema za preučevanje procesa suhega reformin-ga metana smo sodelovali s kolegi s Fakultete za kemijo in kemijsko tehnologijo Univerze v Ljubljani. Rezultati izračunov so bili primerjani z eksperimentalnimi podatki na podlagi katalit-skih testov v dveh geometrijsko različnih
reak-Cu-oxo-Fe clusters on SiO 2
INCREASING TOLUENE OXIDATION RATE
CuO
SiO 2
Slika 4: Grafični prikaz nizko-temperaturnega procesa su-hega reforminga metana, vo-denega v konvencionalnem in mikrokanalnem reaktorskem sistemu. Podrobno smo pro-učevali katalizator na osnovi niklja, nanešen na nanožičke iz cerijevega dioksida.
Figure 4: Graphical represen-tation of the low-tempera-ture dry methane reforming carried out in conventional and micro-channel reactor units. In this study, Ni depo-sited on ceria rods as catalyst was examined in detail.
Slika 3: Kemijska in struktur-na XRD astruktur-naliza nikljevih struktur- nano-delcev, slednja opravljena in situ med katalitsko reakcijo.
Figure 3: Chemical and stru-ctural XRD analysis of nickel nanoparticles, the latter was performed in-situ during ca-talytic reaction.
torskih sistemih, tj. konvencionalnem reaktorju s strnjenim slojem katalizatorja in mikrokanalnem reaktorju s strnjenim slojem katalizatorja med dvema ploščama. Članek je bil objavljen v reviji Chemical Engineering Journal (Slika 4).
Dr. Albin Pintar in dr. Gregor Žerjav sta ime-la vabljeni predavanji na Fakulteti za kemijsko inženirstvo in tehnologijo Univerze v Zagrebu, Hrvaška.
Prof. dr. Nataša Novak Tušar, dr. Albin Pintar in prof. dr. Gunther Rupprechter so predsedova-li poletni šopredsedova-li 2020 EFCATS (European Federati-on of Catalysis Societies) v Portorožu, Slovenija.
reactor. The results are published in Chemical Engineering Journal (Figure 4).
Dr. Albin Pintar and Dr. Gregor Žerjav deliv-ered invited lectures at the Faculty of Chemical Engineering and Technology, University of Za-greb (Croatia).
Prof. Dr. Nataša Novak Tušar, Dr. Albin Pintar and Prof. Dr. Gunther Rupprechter chaired the 2020 EFCATS (European Federation of Catalysis Societies) Summer School in Portorož, Slovenia.
Raziskovalci / Researchers:
prof. dr. Nataša Novak Tušar doc. dr. Gregor Mali
dr. Ciara Byrne dr. Petar Djinović dr. Rohini Khobragade dr. Andraž Krajnc dr. Matjaž Mazaj dr. Albin Pintar dr. Alenka Ristić dr. Andraž Šuligoj
dr. Vikram Sagar Tatiparthi dr. Ivalina Ognyanova Trendafilova dr. Sanjay Gopal Ullattil
dr. Nada Verdel dr. Gregor Žerjav
Doktorski študenti / PhD Students:
Matej Gabrijelčič Kristijan Lorber Matevž Roškarič Aljaž Škrjanc Tia Kristian Tajnšek Janez Volavšek Nika Vrtovec Tadej Žumbar
Strokovni sodelavci in tehnično osebje / Technical Staff:
Špela Božič
Marjana Gantar Albreht Edi Kranjc
Suzana Mal Manca Ocvirk Mojca Opresnik Anja Sedminek
Zaslužni raziskovalci / Researher Emeritus:
prof.dr. Venčeslav Kaučič
Bibliografija Bibliography
38 izvirnih znanstvenih člankov Original Scientific Articles 2 pregledna znanstvena članka Review Articles
1 strokovni članek Professional Article
2 samostojna znanstvena sestavka ali poglavja v monografskih publikacijah
Independent Scientific Component Parts or Chapters in Monographs
1 predgovor, spremna beseda Preface, Afterword
1 intervju Interview
23 objavljenih povzetkov znanstvenih prispevkov na konferencah
Published Scientific Conference Contribution Abstracts
4 predavanja na tujih univerzah Invited Lectures at Foreign Universities 1 vabljeno predavanje na konferenci brez natisa Unpublished Invited Conference Lecture 1 končno poročilo o rezultatih raziskav Final Research Report
3 magisteriji Master's Theses
1 doktorat Doctoral Dissertation
11 uredništev revij Journal Editorships
D10
Zeleni dogovor bo motor našega okrevanja. (Ursula von der Leyen, predsednica Evropske komisije)
Ključne dejavnosti
• razvoj sekundarnih baterijskih sistemov (aku-mulatorjev);
• razvoj komponent za obnovljive energetske sisteme, barvnih prevlek za nizkotemperatur-ne absorberje ter hidrofobnih, oleofobnih in ognjevarnih materialov;
• sinteza in karakterizacija novih elektrokatali-zatorjev za potencialno uporabo v nizkotempe-raturnih gorivnih celicah in elektrolizerjih;
• razvoj in situ in ex situ analiznih in eksperi-mentalnih pristopov za študij strukture (IR spektroskopija, difrakcija), morfologije (mi-kroskopija), elektrokemije in reologije komple-ksnih materialov.
Glavni dosežki v letu 2020
Zaradi naraščajoče porabe litija se baterijski ra-zvoj osredotoča na pogostejše ter tudi cenejše ele-mente (aluminij, magnezij ipd.). Razvili smo nov tip aluminijevega akumulatorja, v katerem smo kot katodo uporabili polimerni organski material.
Z materialom na osnovi antrakinona smo povečali količino energije, ki jo shranimo v akumulatorju.
Delo smo kasneje nadaljevali na anodni strani,
The Green deal will be the motor to our recovery. (Ursula von der Leyen, European
Commission President) Topic areas
• Development of secondary battery systems
• Development of components for renewable energy systems, coloured coatings for low temperature solar absorbers and hydrophobic, oleophobic and flame-retardant additives and thin films,
• Synthesis and characterisation of novel elec-trocatalysts for low-temperature fuel cells and electrolysers,
• Development of in situ and ex situ analytical and experimental approaches for investigation of structural (IR spectroscopy, diffraction), mor-phological (microscopy), electrochemical and rheological properties of complex materials.
Important achievements in 2020
Due to increasing consumption of lithium, the fo-cus of battery research has shifted to more abun-dant and cheaper elements. We developed a new type of aluminium battery in which the cathode is composed of an organic polymeric material. An anthraquinone-based cathode showed an unprec-edented increase in stored energy. On the anode side, a thin layer aluminium was deposited on the
Odsek za kemijo
materialov Department of
Materials Chemistry
Vodja / Head:
prof. dr. Miran Gaberšček
kjer smo aluminij v tanki plasti nanesli na sepa-rator. Tankoplastna anoda pomeni manjšo pora-bo aluminija. Hkrati omogoča hitrejše polnjenje in praznjenje celice, kar je ključnega pomena za stacionarno shranjevanje energije. Zaradi velike aktualnosti je raziskovalno delo na področju alu-minija, ki ga izvajamo skupaj s kolegi s Švedske, doseglo velik odmev v javnosti, o njem so poročali celo dnevni časopisi na vseh kontinentih.
Elektrokatalitične reakcije omogočajo izredno zanimivo alternativo konvencionalni katalizi. Raz-iskali smo vplive podlage iridijevih katalizatorjev na reakcijo tvorbe kisika, ki je velikega pomena za razvoj elektrolizerjev in vodikove ekonomije. Po-kazali smo, da lahko aktivnost in stabilnost ele-ktrokemične reakcije izboljšamo z nadzorom nad morfologijo podlage, z mešanjem dveh vrst
podla-separator, which was shown to lead to lower alu-minium consumption. At the same time, a thin-layer design allows for a faster charge/discharge, which is crucial for stationary energy storage. Due to the extreme relevance of this work, which has been car-ried out in multi-year cooperation with Swedish col-leagues, the main findings have not only been pub-lished in top-ranking journals but even in general daily papers across all five continents.
Electrocatalytic reactions provide a highly in-teresting alternative to conventional catalysis. We investigated the effects of iridium catalyst support on the oxygen evolution reaction, which is crucial for the development of electrolysers and hydrogen economy. We found that the activity and stability of the electrochemical reaction could be improved by controlling the morphology and composition
Slika 1: Shema aluminijevega akumulatorja s tankoplastno aluminijevo anodo.
Figure 1: Schematics of an aluminium battery with a thin-layer aluminium anode
ge in interakcijo iridija z oksidno podlago. Podrobno smo raziskali stabilnost elektrokatalizatorjev s po-samičnimi atomi za reakcijo redukcije kisika, ki je pomembna za delovanje nizkotemperaturne goriv-ne celice. Omenjeni materiali veljajo za vročo temo v elektrokatalizi, ker omogočajo občutno znižanje uporabe dragih in redkih kovin. Proučevali smo tudi aktivnost, selektivnost in stabilnost bakrovih katalizatorjev za elektrokemijsko redukcijo ogljiko-vega dioksida. Na področju premazov smo v sode-lovanju s konzorcijskimi partnerji projekta M-era.
NET »WABASELCOAT« razvili barvne spektralno selektivne prevleke na vodni osnovi ter jim dodali ognjevarne lastnosti. V sodelovanju s Katedro za tekstilno in oblačilno inženirstvo na Naravoslovno-tehniški fakulteti Univerze v Ljubljani smo razvili nove ognjevarne dodatke za PA6, jih vključili v poli-amidne tekstilije in razvili prve antivirusne prevle-ke za tekstil. V okviru projekta EU Friendship smo razvili prve absorberske premaze za pridobivanje industrijske toplote. Razvili smo tudi premaze proti prijemanju za podjetje Hidria, v sodelovanju z Od-sekom za katalizo in reakcijsko inženirstvo ter Ste-klarno Hrastnik pa smo razvili bio-osnovana lepila za lepljenje e-komponent na steklo ter elektrokro-mne dekoracijske elemente za stekla.
of the substrate as well as via the interaction of iridium with the oxide substrate. Further, we in-vestigated the stability of single atom electrocata-lysts for the oxygen reduction reaction occurring in low-temperature fuel cells. These “hot-topic”
materials allow a significant reduction of the use of precious and rare metals. Finally, we investi-gated the properties of copper catalysts for the electrochemical reduction of carbon dioxide.
Within the “WABASELCOAT” project, we devel-oped coloured spectrally selective coatings on a water-based binder system. In cooperation with the Chair of Textile and Clothing Engineering, Faculty of Natural Science and Engineering, University of Lju-bljana, we developed new flame-retardant additives and incorporated them in polyamide 6 textiles. The first antiviral coatings were also developed. Within the "FRIENDSHIP" project, a first generation of ab-sorber coatings was developed for production of industrial heat. Together with Hidria, we developed the first type of antisticking coatings. In collabora-tion with the Department of Catalysis and Chemical Reaction Engineering and Steklarna Hrastnik, we developed a bio-based glue for e-component glu-ing on glass. We also developed electrochromic ele-ments for glass bottle decoration.
Slika 2: Shematski prikaz raziskav na področju elektrokatalize.
Figure 2: Typical research cycle in the field of electrocatalysis
Slika 4: Sodelavci novoustanovljenega Laboratorija za elektrolizo.
Figure 4: Co-workers of the newly-established Laboratory for Electrocatalysis
Slika 3: Spektralno selektivni premazi na vodni osnovi na polimernih absorberjih podjetja Inaven-ta (Norveška).
Figure 3: Water based spectrally selective coating on the full size polymeric absorber of the Inaventa Com-pany (Norway)
Raziskovalci / Researchers:
izr.prof.dr. Robert Dominko izr.prof.dr. Nejc Hodnik doc.dr. Ivan Jerman dr. Federico Baiutti dr. Marjan Bele dr. Jan Bitenc
dr. Elena Chernyshova dr. Marija Čolović dr. Goran Dražić dr. Sara Drvarič Talian dr. Matija Gatalo dr. Primož Jovanovič dr. Vasko Jovanovski dr. Tomaž Katrašnik dr. Marta Klanjšek Gunde dr. Anja Kopač Lautar dr. Jože Moškon dr. Rekha Narayan
dr. Mohammed Azeezulla Nazrulla dr. Nejc Pavlin
dr. Urša Petek dr. Klemen Pirnat dr. Gašper Poklukar dr. Francisco Ruiz Zepeda
dr. Milutin Smiljanić dr. Angelja Kjara Surca dr. Žiga Štirn
dr. Danaja Štular
dr. John Fredy Velez Santa dr. Alen Vižintin
dr. Klemen Zelič dr. Milena Zorko
Doktorski študenti / PhD Students:
Michel Adamič Tanja Bančič Marko Firm Armin Hrnjić Gregor Kapun
Gorazd Koderman Podboršek Sabina Kolar
Alenka Križan Anja Lončar Olivera Lužanin Svit Menart Léonard Moriau Luka Noč Tina Paljk