1. Selective glucose oxidation to glucaric acid using bimetallic catalysts : lattice expansion or electronic structure effect?Žan Lavrič, Janvit Teržan, Ana Kroflič, Janez Zavašnik, Joanna E. Olszówka, Štefan Vajda, Matej Huš, Miha Grilc, Blaž Likozar, 2024, izvirni znanstveni članek Povzetek: Our study presents a comprehensive approach for the selective oxidation of glucose to glucaric acid (GA) by heterogeneous catalysis. We have synthesized and characterized Au/ZrO2, AuCu/ZrO2 and AuPt/ZrO2 catalysts using X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and oxygen pulse chemisorption (OPS) techniques. Combining experimental observations with in-depth density functional theory (DFT) studies, we found that bimetallic catalysts form alloys, which exhibit different characteristics than monometallic counterparts for the given reaction. We performed batch reactions, varying temperature and oxygen pressure, and used the data to construct a predictive microkinetic model. As it turned out, AuPt/ZrO2 showed the highest selectivity, yielding 32 % of GA at 100 °C and 30 barg O2. Our results provide valuable insights for the developing of efficient catalysts and point out the bottlenecks for the oxidation of glucose to GA. Ključne besede: glucaric acid, glucose oxidation, catalyst characterization, density functional theory, microkinetic modelling Objavljeno v DiRROS: 06.12.2023; Ogledov: 233; Prenosov: 137 Celotno besedilo (2,73 MB) Gradivo ima več datotek! Več... |
2. Mechanistic study of fast performance decay of PtCu alloy-based catalyst layers for polymer electrolyte fuel cells through electrochemical impedance spectroscopyMaximilian Grandi, Matija Gatalo, Ana Rebeka Kamšek, Gregor Kapun, Kurt Mayer, Francisco Ruiz-Zepeda, Martin Šala, Bernhard Marius, Marjan Bele, Nejc Hodnik, Merit Bodner, Miran Gaberšček, Viktor Hacker, 2023, izvirni znanstveni članek Ključne besede: PEFC, catalyst layer, platinum–copper, degradation, ionomer, electrochemical impedance spectroscopy, membrane electrode assembly Objavljeno v DiRROS: 23.06.2023; Ogledov: 388; Prenosov: 194 Celotno besedilo (2,26 MB) Gradivo ima več datotek! Več... |
3. Mechanisms of copper-based catalyst deactivation during CO [sub] 2 reduction to methanolAnže Prašnikar, Andraž Pavlišič, Francisco Ruiz-Zepeda, Janez Kovač, Blaž Likozar, 2019, izvirni znanstveni članek Ključne besede: catalyst deactivation, methanol synthesis, deactivation mechanism, modelling Objavljeno v DiRROS: 24.11.2020; Ogledov: 1346; Prenosov: 982 Celotno besedilo (4,46 MB) Gradivo ima več datotek! Več... |
4. Surface structure-activity relationships of Cu/ZnGaO [sub] x catalysts in low temperature water-gas shift (WGS) reaction for production of hydrogen fuelVenkata D. B. C. Dasireddy, Karmina Rubin, Andrej Pohar, Blaž Likozar, 2020, izvirni znanstveni članek Ključne besede: syngas, hydrogen, ▫$Cu/ZnGaO_x$▫ catalyst, water-gas shift, WGS, steam reforming reactions, fuel cell systems Objavljeno v DiRROS: 12.03.2020; Ogledov: 1964; Prenosov: 760 Celotno besedilo (2,50 MB) Gradivo ima več datotek! Več... |
5. In-situ regeneration of Au nanocatalysts by atmospheric-pressure air plasma : significant contribution of water vaporBin Zhu, Xiao-Song Li, Jing-Lin Liu, Jin-Bao Liu, Xiaobing Zhu, Ai-Min Zhu, 2015, izvirni znanstveni članek Ključne besede: Au catalyst, air plasma, in-situ regeneration, water vapor, CO oxidation Objavljeno v DiRROS: 07.04.2016; Ogledov: 4462; Prenosov: 994 Povezava na celotno besedilo |
6. In-situ plasma regeneration of deactivated Au/TiO [sub] 2 nanocatalysts during CO oxidation and effect of N [sub] 2 contentHong-Yu Fan, Chuan Shi, Xiao-Song Li, Shuo Zhang, Jing-Lin Liu, Ai-Min Zhu, 2012, izvirni znanstveni članek Ključne besede: gold catalyst, deactivation, plasma regeneration, N [sub] 2 content, CO oxidation Objavljeno v DiRROS: 07.04.2016; Ogledov: 5823; Prenosov: 836 Povezava na celotno besedilo |