Carbon-supported Co-pyridine as non-platinum cathode catalyst for alkaline membrane fuel cells

XU Li; ZHOU Xuejun; TIAN Binglun; LIU Shiyao; QIAO Jinli

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Carbon-supported Co-pyridine as non-platinum cathode catalyst for alkaline membrane fuel cells

XU Li 1,ZHOU Xuejun 2,TIAN Binglun 3,LIU Shiyao 4,QIAO Jinli 2 *

1. College of Environmental Science and Engineering, Donghua University, ShangHai 201620

2.College of Environmental Science and Engineering, Donghua University, ShangHai 201620

3. Pearl Hydrogen Technology CO., Ltd, ShangHai 201803

4.Pearl Hydrogen Technology CO., Ltd, ShangHai 201803

*Correspondence author

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

Opened online:25 January 2013

Accepted by: none

Citation: XU Li,ZHOU Xuejun,TIAN Binglun.Carbon-supported Co-pyridine as non-platinum cathode catalyst for alkaline membrane fuel cells[OL]. [25 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4516397

In this work, carbon-supported pyridine-cobalt nanoparticles (CoPy/C) are synthesized using cobalt sulfate heptahydrate (CoSO4 7H2O) and pyridine (Py) as the Co and N precursors via a solid state reaction by heat-treatment in an inert atmosphere at 800oC. In particular, the ORR kinetics on these catalyst materials are evaluated using cyclic voltammetry (CV) and rotating disk electrode (RDE) in electrolytes of various KOH concentrations, ranging from 0.05 to 12.0 M, because ORR is more favourable in alkaline electrolytes than in acidic and neutral electrolytes. The Koutecky-Levich equation analysis indicates that oxygen can be reduced to OH- with high selectivity through a direct four-electron pathway mechanism in KOH concentrations in the range of 0.05 - 6.0 M. These catalysts exhibit the superior methanol tolerance to commercial 40%Pt/C catalyst, and the negative effect of higher concentration of KOH is much less for CoPy/C than for Pt/C, suggesting the promising utilization of CoPy/C catalysts as electrocatalysts for alkaline polymer electrolyte membrane fuel cells.

Keywords:Co-Pyridine/C catalyst; Oxygen reduction reaction; KOH concentration effect; methanol tolerance; polymer electrolyte membrane fuel cell

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