期刊
CHINESE SCIENCE BULLETIN
卷 58, 期 20, 页码 2435-2439出版社
SCIENCE PRESS
DOI: 10.1007/s11434-013-5723-4
关键词
Ni-Cr binary catalysts; borohydride ion; electro-oxidation; fuel cell
资金
- Graduate Student Science and Technology Innovation Foundation of Chongqing University [CDJXS10220013]
Ni-Cr binary anode catalysts used in direct borohydride fuel cells (DBFCs) were prepared using a constant potential electrodeposition method. Compared with pure metal Ni catalysts, the electro-oxidation currents of borohydride ions (BH (4) (-) ) more than doubled when using Ni-Cr binary catalysts under the same conditions. The enhanced activity of the Ni-Cr binary catalysts could be attributed to the change in distribution of BH (4) (-) ions on the surface of the Ni electrode. This is due to Cr electrodeposits, which allows a greater number of hydrogen atoms to catalyze from each tetrahedron BH (4) (-) ion. The performance of Ni-Cr binary catalysts could also be improved by optimizing the electrodeposition conditions. The results show that Ni-Cr binary catalysts are optimally prepared using an electrodeposition method of 1s with a Cr3+ concentration of 0.2 mol L-1 and a potential of -0.100 V.
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