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, original scientific article Abstract: 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. Keywords: glucaric acid, glucose oxidation, catalyst characterization, density functional theory, microkinetic modelling Published in DiRROS: 06.12.2023; Views: 233; Downloads: 137 Full text (2,73 MB) This document has many files! More... |
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, original scientific article Keywords: PEFC, catalyst layer, platinum–copper, degradation, ionomer, electrochemical impedance spectroscopy, membrane electrode assembly Published in DiRROS: 23.06.2023; Views: 388; Downloads: 194 Full text (2,26 MB) This document has many files! More... |
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, original scientific article Keywords: catalyst deactivation, methanol synthesis, deactivation mechanism, modelling Published in DiRROS: 24.11.2020; Views: 1346; Downloads: 982 Full text (4,46 MB) This document has many files! More... |
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, original scientific article Keywords: syngas, hydrogen, ▫$Cu/ZnGaO_x$▫ catalyst, water-gas shift, WGS, steam reforming reactions, fuel cell systems Published in DiRROS: 12.03.2020; Views: 1964; Downloads: 760 Full text (2,50 MB) This document has many files! More... |
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, original scientific article Keywords: Au catalyst, air plasma, in-situ regeneration, water vapor, CO oxidation Published in DiRROS: 07.04.2016; Views: 4462; Downloads: 994 Link to full text |
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, original scientific article Keywords: gold catalyst, deactivation, plasma regeneration, N [sub] 2 content, CO oxidation Published in DiRROS: 07.04.2016; Views: 5823; Downloads: 836 Link to full text |