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Electrochemical Conversion of Methane to C2+ Hydrocarbons and Hydrogen
Yige Guo1,2, Tianfu Liu1, Minggao Xu3
1State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
None:
Catalytic methane (CH4) upgrading to C2+ products has attracted widespread interest. However, non-oxidative coupling and oxidative coupling of CH4 are limited by coking and over-oxidation, respectively. In this work, we propose an efficient and stable CH4 conversion system in a solid oxide steam electrolyzer, enabling the simultaneous production of C2+ hydrocarbons and H2. Furthermore, through various in situ characterizations, we reveal a gaseous ·CH3 radical coupling mechanism underlying the electrochemical CH4 conversion. These findings pave the way for the efficient design of the electrode for anodic CH4 coupling reactions in a solid oxide electrolyzer and establish a new framework for atom-efficient strategies for CH4 upgrading.
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