Journal
RENEWABLE ENERGY
Volume 145, Issue -, Pages 514-520Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2019.06.034
Keywords
Proton exchange membrane fuel cell; Pt catalyst; Pulse electrodeposition; Methanol oxidation reaction; Kinetic parameter
Funding
- National Natural Science Foundation of China [21476246, 51876061, 51821004]
- Fundamental Research Funds for the Central Universities [2018ZD04]
- National Research Foundation of Korea [NRF-2019R1C1C1006310]
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The growth mechanism and the corresponding kinetic parameters are valuable to improve the electrodeposition method for preparing Pt-based catalysts. In this paper, the effect of the operation condition on the electrodeposition mechanism has been investigated through experiments and theoretical analysis, and the corresponding kinetic parameters were acquired. The catalytic activity of the deposited Pt catalyst prepared by the pulse current (PC) electrodeposition method was improved, compared with that of the commercial Pt catalyst and the Pt catalyst prepared by the direct current electrodeposition method. The results show that both high current density and high t(on)/t(off) in PC electrodeposition could cause large cathode overpotentials, resulting in faster nucleation rate and smaller catalyst particle size, which leads to the better reaction activity of the Pt catalyst. Finally, kinetic parameters including the constants, which relate the nucleation rate with the overpotential, the transfer coefficient and the exchange current density of the electrodeposition process, were determined. (C) 2019 Elsevier Ltd. All rights reserved.
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