Light‐Induced Redox Looping of a Rhodium/CexWO3 Photocatalyst for Highly Active and Robust Dry Reforming of Methane

• DOI: 10.1002/ange.202200567
• Publication Date: 2022-03-12T04:48:47Z
• Authors: Yuying Yang; Zhigang Chai; Xuetao Qin; Zhenzhen Zhang; Aidaer Muhetaer; Cong Wang; Hanlin Huang; Chaoran Yang; Ding Ma; Qi Li; Dongsheng Xu
• Keywords: Quantum Efficiency

Abstract Dry reforming of methane (DRM) has provided an effective avenue to convert two greenhouse gases, CH 4 and CO 2 , into syngas. Here, we design a DRM photocatalyst Rh/Ce x WO 3 that invokes both photothermal photoelectric processes, which overcomes the thermodynamic limitation under conventional conditions. In contrast plasmonic or UV‐response photocatalysts, our produces superior light‐to‐chemical energy efficiency (LTCEE) 4.65 % with moderate light intensity. We propose light‐induced metal‐to‐metal charge transfer plays crucial role in reaction, induces redox looping between Ce W species lower activation energy. Quantum mechanical studies reveal high oxygen mobility accompanied formation oxo‐bridge species, results substantial elimination deposited C during reaction. Our catalyst strategy could offer promising energy‐efficient industrial process for DRM.