Boosting reactivity of water-gas shift reaction by synergistic function over CeO2-x/CoO1-x/Co dual interfacial structures

Xin-Pu Fu, Cui-Ping Wu, Wei-Wei Wang, Zhao Jin, Jin-Cheng Liu (), Chao Ma () and Chun-Jiang Jia ()
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Xin-Pu Fu: Shandong University
Cui-Ping Wu: Shandong University
Wei-Wei Wang: Shandong University
Zhao Jin: Shandong University
Jin-Cheng Liu: Nankai University
Chao Ma: Hunan University
Chun-Jiang Jia: Shandong University

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Dual-interfacial structure within catalysts is capable of mitigating the detrimentally completive adsorption during the catalysis process, but its construction strategy and mechanism understanding remain vastly lacking. Here, a highly active dual-interfaces of CeO2-x/CoO1-x/Co is constructed using the pronounced interfacial interaction from surrounding small CeO2-x islets, which shows high activity in catalyzing the water-gas shift reaction. Kinetic evidence and in-situ characterization results revealed that CeO2-x modulates the oxidized state of Co species and consequently generates the dual active CeO2-x/CoO1-x/Co interface during the WGS reaction. A synergistic redox mechanism comprised of independent contribution from dual functional interfaces, including CeO2-x/CoO1-x and CoO1-x/Co, is authenticated by experimental and theoretical results, where the CeO2-x/CoO1-x interface alleviates the CO poison effect, and the CoO1-x/Co interface promotes the H2 formation. The results may provide guidance for fabricating dual-interfacial structures within catalysts and shed light on the mechanism over multi-component catalyst systems.

Date: 2023
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DOI: 10.1038/s41467-023-42577-9

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