In the present study, the methanol oxidation reaction was investigated on a nickel ion incorporated to the zinc oxide-sodium dodecyl sulfate-polytyramine (ZnO-SDS-Pty) nanocomposite film by cyclic voltammetry and chronoamperometry. ZnO-SDS-Pty nanocomposite was prepared by using the repeated potential cyclic voltammetry in a solution containing ZnO nanoparticles and tyramine in an acidic solution of SDS by cycling the potential. The electrochemical oxidation of methanol was investigated by a stable redox behavior of the Ni(III)/Ni(II) couple at the potential of 0.4 V, after the immersion of the modified electrode (ZnO-SDS-Pty/G) in an alkaline media (i.e. NaOH 0.1 molL⁻¹) of nickel chloride solution. The electrochemical characterization of the modified electrode exhibited that the ZnO-SDS-Pty nanocomposite, electrodeposited on the electrode surface, improved the catalytic efficiency of the dispersed nickel ions toward methanol oxidation. The catalytic rate constant and diffusion coefficient of the methanol oxidation reaction were calculated by chronoamperometry. The Ni-ZnO-SDS-Pty nanocomposite displayed a highly stable response during the oxidation of methanol, proving to be a suitable electrode material in methanol fuel cells.

在本研究中，通过循环伏安法和计时电流法研究了掺入氧化锌-十二烷基硫酸钠-聚酪胺（ZnO-SDS-Pty）纳米复合膜中的镍离子上的甲醇氧化反应。ZnO-SDS-Pty纳米复合材料是通过在SDS的酸性溶液中通过循环电势在包含ZnO纳米颗粒和酪胺的溶液中使用重复电势循环伏安法制备的。将修饰电极（ZnO-SDS-Pty / G）浸入碱性溶液中后，通过在0.4 V电位下Ni（III）/ Ni（II）对的稳定氧化还原行为研究甲醇的电化学氧化介质（即NaOH 0.1 molL ^-1）的氯化镍溶液。修饰电极的电化学表征表明，电沉积在电极表面的ZnO-SDS-Pty纳米复合材料提高了分散的镍离子对甲醇氧化的催化效率。用计时电流法计算甲醇氧化反应的催化速率常数和扩散系数。Ni-ZnO-SDS-Pty纳米复合材料在甲醇氧化过程中表现出高度稳定的响应，被证明是甲醇燃料电池中合适的电极材料。