Corresponding Author

Yi-xiong ZHENG


Electrocatalytic oxidation of methanol at the nano Ni-B amorphous alloy powder-microelectrode in alkaline media was studied by using cyclic voltammetry.Compared to the highly preferred orientation(220) nickel electrode,The onset potential of methanol electrooxidation at the nano Ni-B microelectrode is negatively shifted about 0.04V,and the current density is increased approximately by 2 orders of magnitude.Thus,the nano Ni-B microelectrode has very strong electrocatalytic activity for the oxidation of methanol.The kinetic parameters were determined with the steady polarization curves.The results show that the rate constants for both the oxidation of Ni(Ⅱ) to Ni(Ⅲ) and the reduction of Ni(Ⅲ) to Ni(Ⅱ) at the nano Ni-B microelectrode are elevated by about the 3 orders of magnitude,while the rate constant for the oxidation of methanol by Ni(Ⅲ) is increased by around the 2 orders of magnitude,in comparison with the highly preferred orientation(220) nickel electrode.


Ni-B amorphous alloy, nanoparticle, powdermicroelectrode, methanol, electrocatalytic oxidation

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