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A three-dimensional porous Co–P alloy supported on a copper foam as a new catalyst for sodium borohydride electrooxidation

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Abstract

Cobalt has been extensively studied as an effective catalyst for the electrooxidation of sodium borohydride. However, there is still the problem of the low catalytic activity of cobalt catalysts. The improvement in the catalytic activity of cobalt for the electrooxidation of sodium borohydride has become a challenge. In this paper, a novel catalyst Co–P alloy was supported on a copper foam (CF) substrate by a one-step electrodeposition method. In the electrodeposition process, a Co–P/CF electrode with a three-dimensional (3D) porous structure was successfully prepared using hydrogen bubbles as a dynamic template. Through the physical characterization of Co–P/CF, it was proven that the doping of P element produced more Co clusters on the surface of the electrode, which resulted in more active sites. These characteristics were very beneficial for NaBH4 electrooxidation. The electrochemical characterization confirmed that the electrocatalytic activity of Co–P/CF for NaBH4 was better than that of Co/CF. At room temperature, for the Co–P/CF in 2.0 mol dm−3 NaOH + 0.20 mol dm−3 NaBH4 solution, the oxidation current density reached 1795 mA cm−2 at −0.20 V (vs. Ag/AgCl), which was higher than that previously reported the literature.

Graphical abstract: A three-dimensional porous Co–P alloy supported on a copper foam as a new catalyst for sodium borohydride electrooxidation

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Publication details

The article was received on 07 Mar 2019, accepted on 04 Jul 2019 and first published on 22 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT01000A
Dalton Trans., 2019, Advance Article

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    A three-dimensional porous Co–P alloy supported on a copper foam as a new catalyst for sodium borohydride electrooxidation

    J. Zhang, D. Zhang, C. Cui, H. Wang, W. Jiao, J. Gao and Y. Liu, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT01000A

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