Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-09083-3
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Funding
- National Key Research and Development Program of China [2017YFA0700102]
- Natural Science Foundation of China [91845202]
- Dalian National Laboratary for Clean Eenrgy [DNL180404]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB2000000]
- U.S. National Science Foundation [DMR-1832809]
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Conversion of methane to ethylene with high yield remains a fundamental challenge due to the low ethylene selectivity, severe carbon deposition and instability of catalysts. Here we demonstrate a conceptually different process of in situ electrochemical oxidation of methane to ethylene in a solid oxide electrolyzer under ambient pressure at 850 degrees C. The porous electrode scaffold with an in situ-grown metal/oxide interface enhances coking resistance and catalyst stability at high temperatures. The highest C-2 product selectivity of 81.2% together with the highest C-2 product concentration of 16.7% in output gas (12.1% ethylene and 4.6% ethane) is achieved while the methane conversion reaches as high as 41% in the initial pass. This strategy provides an optimal performance with no obvious degradation being observed after 100 h of high temperature operation and 10 redox cycles, suggesting a reliable electrochemical process for conversion of methane into valuable chemicals.
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