1. Light‐Induced Redox Looping of a Rhodium/CexWO3 Photocatalyst for Highly Active and Robust Dry Reforming of Methane.
- Author
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Yang, Yuying, Chai, Zhigang, Qin, Xuetao, Zhang, Zhenzhen, Muhetaer, Aidaer, Wang, Cong, Huang, Hanlin, Yang, Chaoran, Ma, Ding, Li, Qi, and Xu, Dongsheng
- Subjects
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STEAM reforming , *OXIDATION-reduction reaction , *METHANE , *ACTIVATION energy , *MANUFACTURING processes , *GREENHOUSE gases , *RHODIUM catalysts , *CHARGE transfer - Abstract
Dry reforming of methane (DRM) has provided an effective avenue to convert two greenhouse gases, CH4 and CO2, into syngas. Here, we design a DRM photocatalyst Rh/CexWO3 that invokes both photothermal and photoelectric processes, which overcomes the thermodynamic limitation of DRM under conventional conditions. In contrast to plasmonic or UV‐response photocatalysts, our photocatalyst produces a superior light‐to‐chemical energy efficiency (LTCEE) of 4.65 % with a moderate light intensity. We propose that a light‐induced metal‐to‐metal charge transfer plays a crucial role in the DRM reaction, which induces a redox looping between Ce to W species to lower the activation energy. Quantum mechanical studies reveal that a high oxygen mobility of CexWO3, accompanied with the formation of oxo‐bridge species, results in a substantial elimination of deposited C species during the reaction. Our catalyst design strategy could offer a promising energy‐efficient industrial process for DRM. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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