合成气
氧化物
材料科学
电化学
电解
化学工程
阳极
钙钛矿(结构)
碳纤维
催化作用
无机化学
电极
化学
电解质
冶金
复合数
工程类
物理化学
复合材料
生物化学
作者
Jinhai Lu,Changli Zhu,Changchang Pan,Wenbin Lin,John P. Lemmon,Fanglin Chen,Chunsen Li,Kui Xie
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2018-03-02
卷期号:4 (3)
被引量:136
标识
DOI:10.1126/sciadv.aar5100
摘要
Reforming CH4 into syngas using CO2 remains a fundamental challenge due to carbon deposition and nanocatalyst instability. We, for the first time, demonstrate highly efficient electrochemical reforming of CH4/CO2 to produce syngas in a solid oxide electrolyser with CO2 electrolysis in the cathode and CH4 oxidation in the anode. In situ exsolution of an anchored metal/oxide interface on perovskite electrode delivers remarkably enhanced coking resistance and catalyst stability. In situ Fourier transform infrared characterizations combined with first principle calculations disclose the interface activation of CO2 at a transition state between a CO2 molecule and a carbonate ion. Carbon removal at the interfaces is highly favorable with electrochemically provided oxygen species, even in the presence of H2 or H2O. This novel strategy provides optimal performance with no obvious degradation after 300 hours of high-temperature operation and 10 redox cycles, suggesting a reliable process for conversion of CH4 into syngas using CO2.
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