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 shu

Preparation and Properties of Tremella-like Fe-N-C Composite Catalyst for Oxygen Reduction Reaction

1.
Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;2 College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China

Received Date: 4 May 2017
Revised Date: 23 June 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21071153), the Hunan Provincial Science and Technology Plan of China (Nos. 2016TP1007, 2014FJ2007), and the Open-End Fund for the Valuable and Precision Instruments of Central South University (No. CSUZC201726).

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.
- Oxygen reduction reaction,
- Fe-N-C composite catalyst,
- Porous structure,
- Catalytic activity,
- Catalytic stability
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