Selective Oxidative Coupling of Methane to Ethylene in a Solid Oxide Electrolyser Based on Porous Single-Crystalline CeO2Monoliths

作     者：Lingting Ye Zhibo Shang Prof. Dr. Kui Xie 

作者机构：Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Key Laboratory of Design & Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China Advanced Energy Science and Technology Guangdong Laboratory 29 Sanxin North Road Huizhou Guangdong 116023 China 

出 版 物：《Angewandte Chemie》 (应用化学)

年 卷 期：2022年第134卷第32期

页      面：e202207211-e202207211页

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

主　　题：Carbon Dioxide Ceria Interfaces Methane Porosity 

摘      要：Catalytic conversion of CH 4 to C 2 H 4 plays an important role in the light olefin industry. Here, we report the electrochemical conversion of CH 4 to C 2 H 4 /C 2 H 6 at the anode with the electrolysis of CO 2 to CO at the cathode in a solid oxide electrolyser. We constructed well-defined interfaces that function as three-phase boundaries by exsolving single-crystalline Ni nanoparticles in porous single-crystalline CeO 2 monoliths. We engineered the chemical states and flux of active oxygen species for the oxidation of CH 4 at the anode by controlling voltage and temperature. We show the unprecedented C 2 selectivity (C 2 H 4 and C 2 H 6 ) of ≥99.5 % at a CH 4 conversion of ≈7 %. The electrolyser exhibits excellent durability without performance degradation being observed in a continuous operation of 100 hours. Our work enables a novel path for the selective conversion of CH 4 /CO 2 into useful chemicals, and the technique of building well-defined interfaces may find potential applications in other fields.