Organometallic Complexes Anchored to Conductive Carbon for Electrocatalytic Oxidation of Methane at Low Temperature
| Autor: | Quanning Li, T. Brent Gunnoe, William A. Hubbard, Andrew M. Herring, Brian G. Trewyn, Vinh Nguyen, Chilan Ngo, Matthew E. O'Reilly, Tristan S. Gray, Madhura Joglekar, Svitlana Pylypenko |
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| Rok vydání: | 2015 |
| Předmět: |
Proton exchange membrane fuel cell
chemistry.chemical_element 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Biochemistry Catalysis Methane chemistry.chemical_compound Colloid and Surface Chemistry X-ray photoelectron spectroscopy Organometallic Compounds Organic chemistry Chemistry Photoelectron Spectroscopy Temperature General Chemistry 021001 nanoscience & nanotechnology Carbon 0104 chemical sciences Microscopy Electron Chemical engineering Covalent bond 0210 nano-technology Platinum Oxidation-Reduction |
| Zdroj: | Journal of the American Chemical Society. 138:116-125 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.5b06392 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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