Electrochemical reduction of oxygen on nano-structured M (M = Fe, Co, Ce, W)Py/C in alkaline electrolyte

QIAO Jinli; DING Lei; XU Li; DAI Xianfeng

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Electrochemical reduction of oxygen on nano-structured M (M = Fe, Co, Ce, W)Py/C in alkaline electrolyte

QIAO Jinli *,DING Lei,XU Li,DAI Xianfeng

College of Environmental Science and Engineering, Donghua University, Shanghai 201620

*Correspondence author

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Funding: 20110075110001（No.Specialized Research Fund for the Doctoral Program of Higher Education, SRFD）, 21173039（No.the National Natural Science Foundation of China）

Opened online:12 January 2012

Accepted by: none

Citation: QIAO Jinli,DING Lei,XU Li.Electrochemical reduction of oxygen on nano-structured M (M = Fe, Co, Ce, W)Py/C in alkaline electrolyte[OL]. [12 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4459828

This work reports the preparation and characterization of novel non-precious metal catalysts metal catalysts supported on carbon, M (M = Fe, Co, Ce, W )N/C, using a solvent-milling method followed by a heat-treatment at elevated temperature, where pyridine is used as the N-rich ligand for precursor complex formation. The morphology and composition of the catalysts were characterized by Fourier-transform infrared (FT-IR) spectra and thermal analysis (TGA). The catalytic activity on oxygen reduction reaction (ORR) was found to depend strongly on the heat-treatment temperatures and the metal pressures for catalyst synthesis. The resulting MPy/C of 40/60 ratio heat-treated at 800oC shows the best catalytic performance in terms of ORR and follows the order: Co > Fe > Ce > W, where the catalyst composed of Co10wt% -Py30wt%/C shows the highest electroactivity for ORR in alkaline media. Using Rotating disk electrode measurements and Koutechy-Levich analysis, the overall electron transfer number in the catalyzed ORR on Co10wt% -Py30wt%/C was found to be 3.8, suggesting the catalyzed ORR is a 4-electron transfer process from O2 to H2O.

Keywords:Non-precious metal catalyst; nitrogen-dopin; oxygen reduction reaction; rotating disk electrode measuremfent; alkaline fuel cell

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