光催化
氧化还原
甲烷
铑
化学
合成气
光化学
化学工程
催化作用
量子效率
氧气
化学链燃烧
纳米技术
材料科学
无机化学
光电子学
有机化学
工程类
作者
Yuying Yang,Zhigang Chai,Xuetao Qin,Zhenzhen Zhang,Aidaer Muhetaer,Cong Wang,Hanlin Huang,Chao Yang,Ding Ma,Qi Li,Dongsheng Xu
标识
DOI:10.1002/anie.202200567
摘要
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/Cex WO3 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 Cex WO3 , 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.
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