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Selective aerobic oxidation of 5‐(hydroxymethyl)furfural over heterogeneous silver‐gold nanoparticle catalysts

Schade, Oliver; Stein, Frederic; Reichenberger, Sven; Gaur, Abhijeet; Saraci, Erisa; Barcikowski, Stephan; Grunwaldt, Jan-Dierk

Abstract:
Bimetallic silver‐gold alloy nanoparticles on zirconia with varying Ag/Au ratios were designed by a rational approach and tested as catalysts for the selective oxidation of the promising biomass platform molecule 5‐(hydroxymethyl)furfural (HMF). For this purpose, colloidal Ag$_{x}$Au$_{10-x}$ particles with molar compositions x=1/3/5/7/9 were prepared by laser ablation in liquids, a surfactant‐free method for the preparation of highly pure nanoparticles, before adsorption on zirconia. In‐depth characterization of the supported catalysts evidenced alloyed nanoparticles with distinct trends of the surface and bulk composition depending on the overall Ag/Au molar ratio as determined by X‐ray photoelectron spectroscopy (XPS) and X‐ray absorption spectroscopy (XAS), respectively. To uncover the synergistic effect of the Ag/Au ratio, the catalysts were further studied in terms of the catalytic activity and selectivity in HMF oxidation. Either the aldehyde moiety or both functional groups of HMF were selectively oxidized depending on the Ag/Au composition resulting in 5‐hydroxymethyl‐2‐furan‐carboxylic acid (HFCA) or 2,5‐furandicarboxylic acid (FDCA), respectively. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124207
Veröffentlicht am 26.01.2021
Originalveröffentlichung
DOI: 10.1002/adsc.202001003
Scopus
Zitationen: 4
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1615-4150, 1615-4169
KITopen-ID: 1000124207
HGF-Programm 37.03.01 (POF III, LK 01) Catalysts and Mechanisms
Weitere HGF-Programme 56.98.01 (POF III, LK 01) Betrieb in MML
Erschienen in Advanced synthesis & catalysis
Verlag Wiley-VCH Verlag
Band 362
Heft 24
Seiten 5681-5696
Vorab online veröffentlicht am 30.09.2020
Schlagwörter bimetallic catalysts, FDCA, gold, heterogeneous catalysis, hydroxymethylfurfural, laser ablation, selective oxidation, silver, X-ray absorption spectroscopy
Nachgewiesen in Dimensions
Scopus
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