期刊
APPLIED ENERGY
卷 88, 期 3, 页码 974-980出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2010.08.033
关键词
Pt-Co/C electrocatalyst; PEM fuel cell; 4-electron pathway; Cell performance
资金
- Center for Petroleum, Petrochemicals and Advanced Materials, Chulalongkorn University
- Energy Policy and Planning Office, the Ministry of Energy
- Petrochemical Technology Consortium, Department of Chemical Technology, Faculty of Science, Chulalongkorn University
- Thai Government [TKK2555]
The preparation of a Pt-Co/C electrocatalyst for the oxygen reduction reaction in PEM fuel cells was achieved via a combined process of impregnation and seeding. The effects of initial pH of the precursor solution and Pt loading were all found to have a significant effect on both the electrocatalyst morphology and the cell performance when tested in a single PEM fuel cell. The optimum condition found for preparing the Pt-Co/C electrocatalyst was from an initial precursor solution pH of 2 at the metal loading of 23.6-30.3% (w/w). The Pt-Co/C electrocatalysts, formed under these optimal conditions, tested in a single PEM fuel cell with the carbon sub-layer, gave a cell performance of 772 mA/cm(2) or 460 mW/cm(2) at 0.6 V in a H-2/O-2 system. An electron pathway of oxygen reduction on the prepared Pt-Co/C electrocatalyst was also determined using a rotating disk electrode. (C) 2010 Elsevier Ltd. All rights reserved.
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