期刊
CATALYSTS
卷 6, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/catal6060086
关键词
oxygen reduction reaction; non-precious metal electrocatalysts; Iron nitride; nitrogen-doped carbon
资金
- Technology Development Program to Solve Climate Changes of the Natinal Research Foundation (NRF) - Ministry of Science, ICT, & Future Planning [NRF-2015M1A2A2056690]
- Korean Government through the New and Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - MOTIE [20133030011320]
- National Research Foundation of Korea Grant - MSIP
- KIST [2E25411]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20133030011320] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2015M1A2A2056690, 특화전문대학원-02] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Aimed at developing a highly active and stable non-precious metal electrocatalyst for oxygen reduction reaction (ORR), a novel FexNy/NC nanocomposite-that is composed of highly dispersed iron nitride nanoparticles supported on nitrogen-doped carbon (NC)-was prepared by pyrolyzing carbon black with an iron-containing precursor in an NH3 atmosphere. The influence of the various synthetic parameters such as the Fe precursor, Fe content, pyrolysis temperature and pyrolysis time on ORR performance of the prepared iron nitride nanoparticles was investigated. The formed phases were determined by experimental and simulated X-ray diffraction (XRD) of numerous iron nitride species. We found that Fe3N phase creates superactive non-metallic catalytic sites for ORR that are more active than those of the constituents. The optimized Fe3N/NC nanocomposite exhibited excellent ORR activity and a direct four-electron pathway in alkaline solution. Furthermore, the hybrid material showed outstanding catalytic durability in alkaline electrolyte, even after 4,000 potential cycles.
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