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Preparation and Properties of Oxygen Electrode Catalyst (Co, N)/C |
Huihua WANG1,2, Bin GE1, Lijuan SU1, Tianpeng QU1, Deyong WANG1, Zhenhui KANG2( ) |
1 Shagang School of Iron and Steel, Soochow University, Suzhou 215021,China 2 Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215021,China; |
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Cite this article:
Huihua WANG, Bin GE, Lijuan SU, Tianpeng QU, Deyong WANG, Zhenhui KANG. Preparation and Properties of Oxygen Electrode Catalyst (Co, N)/C. Chinese Journal of Materials Research, 2017, 31(4): 267-273.
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Abstract Nano-catalyst of (Co, N)/C has been successfully synthesized by solvothermal method using Co(Ac)2, NH3H2O and nano-carbon powder as starting materials. The results show that the oxygen reduction reaction (ORR) activity of (Co, N)/C is better than that of single nitrogen-doped or cobalt-doped nano-carbon powder in terms of the onset potential (-0.08 V) and peak potential (-0.165 V), which is comparable to the commercial catalyst Pt-C. The electron-transferred number of (Co, N)/C for ORR is about 3.59, which is close to the first order reaction kinetics of ORR (n=4). The intermediate product of H2O2 produced from the ORR takes up about 25%. The (Co, N)/C catalyst also exhibits better methanol durability and stability comparing to the commercial Pt-C (20% Pt). Bonds of N-(C)2, C-N-C and Co-C are the main active units of the catalyst and Co3O4 nano-particles can cooperatively improve the ability of catalyst.
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Received: 20 May 2016
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Fund: Supported by National Natural Science Foundation of China (Nos.51422207, 51604179 & 51674172) and Natural Science Foundation of Jiangsu Province (Nos.BK20140346 & BK20150334) |
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