Energy, Environmental, and Catalysis Applications
- Takehiro Yamada
Takehiro Yamada
Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
More by Takehiro Yamada
- Yasutaka Kuwahara*
Yasutaka Kuwahara
Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
*Email: [emailprotected]. Tel: +81-6-6879-7458.
More by Yasutaka Kuwahara
- Hiromi Yamashita*
Hiromi Yamashita
Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, 2-1 Yamada-oka, Suita 565-0871, Osaka, Japan
*Email: [emailprotected]. Tel: +81-6-6879-7457.
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ACS Applied Materials & Interfaces
Cite this: ACS Appl. Mater. Interfaces 2025, 17, 17, 25267–25277
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https://pubs.acs.org/doi/10.1021/acsami.4c22713
Published April 21, 2025
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Reverse water–gas shift (RWGS) reaction is a promising strategy for the effective valorization of CO2. Because of its endothermic nature, a high-performance catalyst with high durability at high temperatures has been required. Herein, we reveal the dynamic structural changes of platinum-loaded molybdenum suboxide catalysts (Pt/MoOx) in RWGS reaction by multiple operando and in situ measurements, and the catalyst exhibits high activity and CO selectivity, as well as high stability at 500 °C due to the emergence of contiguous Mo species (Mo--Mo) and the strong metal–support interaction (SMSI) effect in MoOx. In situ X-ray absorption fine structure (XAFS) measurements demonstrated that the RWGS reaction is driven by reversible redox of in situ-formed MoOx suboxide, where the contiguous Mo--Mo species in MoOx act as activation sites for CO2. Comprehensive analysis revealed that the MoOx shell surrounding the Pt nanoparticles (NPs) suppresses CO adsorption, thereby resulting in high CO selectivity. Furthermore, the catalyst exhibited a continuous activity increase in the earlier stage of operation at 500 °C, which was attributed to the partial carburization of MoOx during the reaction and the associated increase in the electron density of the Mo species. These findings advance the understanding of RWGS reaction mechanism and suggest innovative strategies for the development of high-performance oxide catalysts with enhanced stability.
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- Catalysts
- Metal nanoparticles
- Platinum
- Redox reactions
- Selectivity
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ACS Applied Materials & Interfaces
Cite this: ACS Appl. Mater. Interfaces 2025, 17, 17, 25267–25277
Click to copy citationCitation copied!
Published April 21, 2025
Publication History
Received
Accepted
Revised
Published
onlinePublished
in issue
Copyright © 2025 American Chemical Society
Request reuse permissions
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