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Carbon incorporated FeN/C electrocatalyst for oxygen reduction enhancement in direct methanol fuel cells: X-ray absorption approach to local structures |
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| Authors: | Chi-Wen Tsai Hao Ming Chen Ru-Shi Liu Kiyotaka Asakura Lei Zhang Jiujun Zhang Man-Yin Lo Yu-Min Peng |
| Affiliation: | aDepartment of Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC;bCatalysis Research Center, Hokkaido University, Hokkaido 001-0021, Japan;cInstitute for Fuel Cell Innovation, National Research Council of Canada, Vancouver, BC, Canada;dMaterial and Chemical Research Laboratories, and Industrial Technology Research Institute, Hsinchu 300, Taiwan, ROC |
| Abstract: | The C-containing iron nitride electrocatalyst is fabricated by chelating N-containing species and Fe2+ with a carbon support under heat treatment in an NH3 atmosphere, which induces the oxygen reduction reaction activity. This is the first demonstration of forming FexC species on iron nitride materials. The correlation between the electrochemical properties and structures are aided to elucidate their features under investigation by using X-ray absorption spectroscopy. A rotating ring disk electrode test is conducted in sulfuric acid solution and the results reveal the low H2O2 yield and approximately 4e− transfer process of the carbon-containing FeN/C electrocatalyst. |
| Keywords: | Nitride Carbon support Oxygen reduction reaction X-ray absorption spectroscopy Rotating ring disk electrode |
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