Organometallic Complexes Anchored to Conductive Carbon for Electrocatalytic Oxidation of Methane at Low Temperature
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- 作者：Madhura Joglekar ; Vinh Nguyen ; Svitlana Pylypenko ; Chilan Ngo ; Quanning Li ; Matthew E. O’Reilly ; Tristan S. Gray ; William A. Hubbard ; T. Brent Gunnoe ; Andrew M. Herring ; Brian G. Trewyn
- 刊名：Journal of the American Chemical Society
- 出版年：2016
- 出版时间：January 13, 2016
- 年：2016
- 卷：138
- 期：1
- 页码：116-125
- 全文大小：720K
- ISSN：1520-5126
文摘
Low-temperature direct methane fuel cells (DMEFCs) offer the opportunity to substantially improve the efficiency of energy production from natural gas. This study focuses on the development of well-defined platinum organometallic complexes covalently anchored to ordered mesoporous carbon (OMC) for electrochemical oxidation of methane in a proton exchange membrane fuel cell at 80 °C. A maximum normalized power of 403 μW/mg Pt was obtained, which was 5 times higher than the power obtained from a modern commercial catalyst and 2 orders of magnitude greater than that from a Pt black catalyst. The observed differences in catalytic activities for oxidation of methane are linked to the chemistry of the tethered catalysts, determined by X-ray photoelectron spectroscopy. The chemistry/activity relationships demonstrate a tangible path for the design of electrocatalytic systems for C–H bond activation that afford superior performance in DMEFC for potential commercial applications.