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Citation: Zhu Long-Zhang, Liu Shu-Lan, Tan Qi-Xian, Guo He-Tong. Study on the Catalytic Property of Ni-WC Composite Electrode for Hydrogen Evolution Reaction in Weak Acidic Medium[J]. Acta Physico-Chimica Sinica, ;1994, 10(11): 1055-1058. doi: 10.3866/PKU.WHXB19941118 shu

Study on the Catalytic Property of Ni-WC Composite Electrode for Hydrogen Evolution Reaction in Weak Acidic Medium

1.
Department of Chemical Engineering,Shanghai Teacher's College of Technology,Shanghai 201418

Received Date: 4 September 1993
Available Online: 15 November 1994

Ni-WC composite coating was obtained by using composite electrodeposition technique. The behavior of Ni-WC composite coating used as cathode material for hydro gen evolution reaction (HER) in a medium of 0.1 mol .L-1H2SO4+0.5mol.L-1 Na2SO4 was inverstigated. The experimental results show that the catalytic activity of Ni-WC composite electrode for HER in weak acidic medium is appearently higher than that of the electrode plated with Ni and is increased with the increasing of WC content in the coating. As compared with Ni plated electrode, the increase in catalytic activity of the composite electrode for HER should be attributed to the dispersion of WC particles in the Ni deposit, since the mechanism of HER for the two kinds of electrodes is the same. Owing to the incorporation of WC particles in Ni deposit, the standard activation free enthalpy for HER is decreased, and the defects and dislocations in the crystal sturcture of the composite coating are increased. This is equivalent to the addition of catalysis accelerator WC in the catalyst Ni.
- Composite electrode,
- Hydrogen evolution reaction,
- Active cathode,
- Activation free enthalpy
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