Proximity-Dependent Oxide–Support Interactions in Cobalt/Ceria-Based Catalysts for Propane Dehydrogenation DOI
Ziyi Li, Sai Chen, Wei Wang

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 6078 - 6087

Published: March 31, 2025

The CoOx-based catalyst has attracted extensive research interest for propane dehydrogenation. However, enhancing its performance been challenged by uncertainties surrounding the valence states of cobalt. This paper describes pivotal role proximity-dependent Co2+ in cobalt/ceria-based catalysts nonoxidative By combining transmission electron microscopy and situ spectroscopies, we discovered that Co2+, stabilized cooperative CoOx–CeOx interface, rather than metallic Co0, is responsible activating C–H bonds propane. For 1Co/20CeAl catalyst, where CoOx CeOx are intimate contact at nanoscale, highest content was achieved, leading to space–time yield (STY) propylene with a high selectivity 86%. Kinetic studies indicate oxide–support interaction mediates Co0/Co2+ ratios, resulting shift rate-determining step from first bond activation 1Co/Al second 1Co/20CeAl. study emphasizes utilization oxide-support interactions optimize catalytic performance.

Language: Английский

Proximity-Dependent Oxide–Support Interactions in Cobalt/Ceria-Based Catalysts for Propane Dehydrogenation DOI
Ziyi Li, Sai Chen, Wei Wang

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 6078 - 6087

Published: March 31, 2025

The CoOx-based catalyst has attracted extensive research interest for propane dehydrogenation. However, enhancing its performance been challenged by uncertainties surrounding the valence states of cobalt. This paper describes pivotal role proximity-dependent Co2+ in cobalt/ceria-based catalysts nonoxidative By combining transmission electron microscopy and situ spectroscopies, we discovered that Co2+, stabilized cooperative CoOx–CeOx interface, rather than metallic Co0, is responsible activating C–H bonds propane. For 1Co/20CeAl catalyst, where CoOx CeOx are intimate contact at nanoscale, highest content was achieved, leading to space–time yield (STY) propylene with a high selectivity 86%. Kinetic studies indicate oxide–support interaction mediates Co0/Co2+ ratios, resulting shift rate-determining step from first bond activation 1Co/Al second 1Co/20CeAl. study emphasizes utilization oxide-support interactions optimize catalytic performance.

Language: Английский

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