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The role of the metal core in the performance of WOx inverse catalysts

Journal Article · · Chem Catalysis
In this study, metal-metal oxide inverse catalysts are valuable in diverse applications but selecting pairs is challenging. Here we investigate the role of metal cores (Pt, Ru, Rh, Pd, Ni) in the formation and dynamics of Brønsted acid sites on WOx overlayer on carbon. By in situ/ex situ characterizations, probe chemistry kinetics, and DFT calculations, we demonstrate that metals with varying work functions promote the WOx dispersion, enhancing the Brønsted acidity than the 3D crystallites on carbon at submonolayer coverages by tuning the oxidation state of WOx. The metal core impacts the water splitting and hydroxylation of WOx. Water splitting on Ru-WOx is thermodynamically favorable compared to Ni-WOx and increases the dehydration rate on the former, leading to an activity enhancement by increasing the H2 pulsing frequency. This study provides insights into optimizing inverse catalysts.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
SC0001004; SC0012704
OSTI ID:
2372694
Report Number(s):
BNL--225707-2024-JAAM
Journal Information:
Chem Catalysis, Journal Name: Chem Catalysis Journal Issue: 10 Vol. 3; ISSN 2667-1093
Publisher:
Cell PressCopyright Statement
Country of Publication:
United States
Language:
English

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