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Citation: ZHENG Yi-Xiong, YAO Shi-Bing, ZHOU Shao-Min. Electrooxidation of Ethanol at Ni-B Amorphous Alloy Electrode and Measurements of Kinetic Parameters[J]. Acta Physico-Chimica Sinica, ;2008, 24(09): 1643-1649. doi: 10.3866/PKU.WHXB20080920 shu

Electrooxidation of Ethanol at Ni-B Amorphous Alloy Electrode and Measurements of Kinetic Parameters

1.
College of Material Science and Engineering, Huaqiao University, Quanzhou 362021, Fujian Province, P. R. China; State Key Laboratory for Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China

Received Date: 13 February 2008
Available Online: 18 July 2008

Electrocatalytic oxidation of ethanol at the nano Ni-B amorphous alloy powder microelectrode and the electroless Ni-B amorphous alloy microdisk electrode in alkaline media was studied by using cyclic voltammetry. It was found that the nano Ni-B amorphous alloy microelectrode had higher electrocatalytic activity for the oxidation of ethanol than the electroless Ni-B amorphous alloy microdisk electrode. The kinetic parameters were determined with the steady polarization curves. The rates of electrocatalytic oxidation of ethanol at the nano Ni-B amorphous alloy microelectrode in alkaline media were much higher than those at the highly preferred orientation (220) nickel electrode. The proton diffusion coefficient of Ni(OH)2 at the nano Ni-B amorphous alloy powder microelectrode determined by cyclic voltammetry was increased by about 2 orders of magnitude, in comparison with the reported values at Ni nanowire electrode and the spherical Ni(OH)2 microencapsulated by cobalt.
- Ni-B amorphous alloy; Nanoparticle; Ethanol; Electrocatalytic oxidation
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