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The hydrogen evolution reaction in an acid medium on nickel electrodeposited with SiW12O 4−40 or SiMo12O 4−40 from electrolytes of various anionic compositions

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Abstract

Nickel was electrodeposited from baths based mainly on dilute aqueous solutions of nickel chloride, sulphate or acetate containing SiW12O 4−40 or SiMo12O 4−40 anions. Each bath contained one of the ions. The other chemical constituents of the solutions were the same in all of the baths. It was shown that improvement in the overpotential (η) and in the exchange current density (i 0) of the electrodes depends both on the composition of the deposition bath and on deposition time. The h.e.r. electrocatalytic activity of the electrodeposits was then analysed and related to their chemical composition. The results show that some extremely active electrocatalysts are produced when combinations of nickel-tungsten (Ni−W) or nickel-molybdenum (Ni−Mo) are formed. The discussion is extended to include typical hypo-hyper-d-electronic transition metals, and it is concluded that alloying these metals significantly increases electrocatalytic activity.

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Authors and Affiliations

  1. Département de Génie Métallurgique, École Polytechnique de Montréal, succ. “A”, C.P. 6079, H3C 3A7, Montréal, Québec, Canada

    O. Savadogo & C. Allard

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  1. O. Savadogo
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  2. C. Allard
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Savadogo, O., Allard, C. The hydrogen evolution reaction in an acid medium on nickel electrodeposited with SiW12O 4−40 or SiMo12O 4−40 from electrolytes of various anionic compositions. J Appl Electrochem 21, 73–76 (1991). https://doi.org/10.1007/BF01103833

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  • DOI: https://doi.org/10.1007/BF01103833

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