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Citation: HUANG Ling, YANG Fang-Zu, XU Shu-Kai, ZHOU Shao-Min. Electrooxidation of Ethanol on Highly Preferred Orientation (220) Nickel Electrode in Alkaline Media[J]. Chinese Journal of Applied Chemistry, ;2005, 22(6): 590-594. shu

Electrooxidation of Ethanol on Highly Preferred Orientation (220) Nickel Electrode in Alkaline Media

1.
Department of Chemistry, Xiamen University, State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen 361005

Corresponding author: HUANG Ling,
Received Date: 29 July 2004
Available Online: 7 November 2004
Fund Project: 国家自然科学基金(20073037)资助项目 (20073037)

Ni electrodes with highly preferred orentation (220) were obtained by means of potentiostatic electrodeposition in the solution containing 1.0 mol/L NiSO₄ and 0.5 mol/L H₃BO₃.The Ni electrode deposited at-1.25 V for 60 min was examined with X-ray diffraction.The result shows that Ni electrode exhibits highly preferred orientation with a texture degree of 92%.The mechanism and catalytic activity of ethanol oxidation on the highly preferred orientation (220) Ni electrode were studied with cyclic voltammetry and in situ FTIR spectroscopy.The results show that the Ni electrode has electrocatalytic activity for the oxdation of ethanol.The main product of ethanol oxidation on the Ni electrode is CH₃COO^-.The kinetic equation of ethanol electrooxidation was derived.The kinetic parameters were determined with the polarization curves.The rate constant k₁ for the oxidation of Ni(Ⅱ) to Ni(Ⅲ) is 4.9×10^-13 exp(0.52FE/RT) and the rate constant (k₂) for the oxidation of ethanol by Ni(Ⅲ) is 5.7×10^-6 L/(mol·s).
- highly preferred orentation Ni electrode,
- electrodeposition,
- ethanol,
- electrooxidation,
- in situ FTIR spectroscopy
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