Microwave-Assisted Oxidation of Glucose Using H2O2 and Au/CePO4 Catalysts: A Comparative Study of Gold Deposition Methods and Analysis of Reaction Pathways

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10504536" target="_blank" >RIV/00216208:11310/25:10504536 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=q2ATCuNCou" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=q2ATCuNCou</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cctc.202500867" target="_blank" >10.1002/cctc.202500867</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microwave-Assisted Oxidation of Glucose Using H2O2 and Au/CePO4 Catalysts: A Comparative Study of Gold Deposition Methods and Analysis of Reaction Pathways

Popis výsledku v původním jazyce

This study aligns with microwave-assisted selective oxidation processes using H2O2 as an environmentally relevant oxidant over heterogeneous gold-based catalysts. The research is focused on assessing the influence of the gold deposition method on the surface properties and catalytic behavior of Au/CePO4 catalysts in the selective oxidation of glucose. A significant part of the study involved also unraveling the nature of active sites and species involved in the oxidation process. For this purpose, three gold deposition methods were applied for the synthesis of Au/CePO4 catalysts, namely deposition-reduction (DR), deposition-precipitation with urea (DPU), and anchoring of gold species on functionalized support (grafting; GR). Au/CePO4-GR was found to significantly outperform the other two materials in terms of H2O2 decomposition efficiency and glucose oxidation. This catalyst enabled highly efficient glucose conversion to gluconic acid in a short reaction time (90% glucose conversion in 20 min, at 120 °C) and could be successfully reused without any significant deactivation. The observed enhancement in the reactivity of Au/CePO4-GR was attributed to its strong surface acidity and the smallest size of gold particles. Furthermore, Au/CePO4-GR exhibited approximately 1.5 times higher activity in glucose oxidation than commercial Au/TiO2 (Mintek), despite its lower efficiency in H2O2 decomposition.

Název v anglickém jazyce

Microwave-Assisted Oxidation of Glucose Using H2O2 and Au/CePO4 Catalysts: A Comparative Study of Gold Deposition Methods and Analysis of Reaction Pathways

Popis výsledku anglicky

This study aligns with microwave-assisted selective oxidation processes using H2O2 as an environmentally relevant oxidant over heterogeneous gold-based catalysts. The research is focused on assessing the influence of the gold deposition method on the surface properties and catalytic behavior of Au/CePO4 catalysts in the selective oxidation of glucose. A significant part of the study involved also unraveling the nature of active sites and species involved in the oxidation process. For this purpose, three gold deposition methods were applied for the synthesis of Au/CePO4 catalysts, namely deposition-reduction (DR), deposition-precipitation with urea (DPU), and anchoring of gold species on functionalized support (grafting; GR). Au/CePO4-GR was found to significantly outperform the other two materials in terms of H2O2 decomposition efficiency and glucose oxidation. This catalyst enabled highly efficient glucose conversion to gluconic acid in a short reaction time (90% glucose conversion in 20 min, at 120 °C) and could be successfully reused without any significant deactivation. The observed enhancement in the reactivity of Au/CePO4-GR was attributed to its strong surface acidity and the smallest size of gold particles. Furthermore, Au/CePO4-GR exhibited approximately 1.5 times higher activity in glucose oxidation than commercial Au/TiO2 (Mintek), despite its lower efficiency in H2O2 decomposition.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ChemCatChem

ISSN

1867-3880

e-ISSN

1867-3899

Svazek periodika

17

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

e00867

Kód UT WoS článku

001550365200001

EID výsledku v databázi Scopus

2-s2.0-105013457009