Citation:
HUANG Yan-Ping, YUAN Hong-Yan, ZHANG Jian, YANG Ya-Hui, LIU Hong-Tao. Preparation and Properties of Tremella-like Fe-N-C Composite Catalyst for Oxygen Reduction Reaction[J]. Chinese Journal of Analytical Chemistry,
;2017, 45(9): 1297-1302.
doi:
10.11895/j.issn.0253-3820.170279
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The Fe-N-C composite catalyst was prepared by the thermal decomposition of the chelate precursors based on Fe(Ⅲ) central ions and o-phenylenediamine ligands. It was observed from the scanning electron microscopy that the crumpled carbon micro-and nano-sheets were intertwined to form a free-standing tremella-like 3D structure. The N2 adsorption/desorption experiments revealed that the composite contained ample micro-and meso-pores and had a specific surface area of 290 m2/g. Graphitic C and multi-crystal Fe3C as main components were confirmed by the X-ray diffraction, and N-doping in the general form of graphite N and pyridine N was also verified by X-ray photoelectron spectroscopy. The electrochemical measurement showed that the tremella-like Fe-N-C composite catalyzed oxygen reduction through a four-electron path in an alkaline solution, and its activity was comparable to the commercial Pt/C catalyst. After 2000 cycles, the limited current density of the Fe-N-C catalytic electrode only decreased less than 5%, and the half-wave potential shift negatively 5 mV, which suggested that the Fe-N-C composite catalyst had better catalytic stability than the commercially used Pt/C catalyst.
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