1651. 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: 327; Prenosov: 177
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1653. Šola rakov glave in vratu : Onkološki inštitut Ljubljana, 1. december 20232023, ni določena Povzetek: V zborniku je celostno predstavljena problematika rakov glave in vratu, kot jo dojemajo strokovnjaki, ki se vsakodnevno srečujejo z bolniki s temi raki. Osvetljeni so vzroki za nastanek rakov glave in vratu, incidenca, mortaliteta in sodobni epidemiološki trendi, znaki in simptomi, ki jih povzročajo, načela sodobne diagnostike in zdravljenja s posledično morbiditeto ter možnosti podporne terapije in rehabilitacije. Poseben poudarek je namenjen obravnavi teh rakov v slovenskem prostoru in nacionalnim smernicam.
Objavljeno v DiRROS: 06.12.2023; Ogledov: 289; Prenosov: 139
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