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首页> 外文期刊>International Journal of Electrochemical Science >Methanol Electrooxidation Reaction in Alkaline Medium on Glassy Carbon Electrode Modified with Ordered Mesoporous Ni/Al2O3
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Methanol Electrooxidation Reaction in Alkaline Medium on Glassy Carbon Electrode Modified with Ordered Mesoporous Ni/Al2O3

机译：有序介孔Ni / Al 2 O 3 修饰的玻碳电极在碱性介质中的甲醇电氧化反应

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In this work, ordered mesoporous Ni/Al2O3 catalysts were prepared by the solvent evaporation induced self–assembly (EISA) method. The synthesized Ni/Al2O3 catalysts were characterized by XRD, elemental distribution analyses, N2 adsorption and TEM. Ni/Al2O3 modified glassy carbon electrode was used to investigate the electrocatalytic oxidation of methanol in 0.1 M NaOH solution by cyclic voltammetry (CV) and chronoamperometry (CA). CVs results showed good electrocatalytic activity of Ni/Al2O3 for methanol electrooxidation in alkaline electrolytes. The good methanol electrooxidation activity of Ni/Al2O3 could be attributed to its synergetic effects between high dispersion of nickel and the ordered mesoporous structure that facilitates the diffusion of methanol and products. The CV and CA results suggest methanol electrooxidation is an irreversible process and a diffusion controlled process. The rate constant for the catalytic reaction of methanol is calculated to be 1.66× 106 cm3 mol–1 s–1.
机译：在这项工作中，通过溶剂蒸发诱导自组装（EISA）方法制备了有序介孔Ni / Al2O3催化剂。通过XRD，元素分布分析，N2吸附和TEM等手段对合成的Ni / Al2O3催化剂进行了表征。使用Ni / Al2O3修饰的玻碳电极通过循环伏安法（CV）和计时电流法（CA）研究甲醇在0.1 M NaOH溶液中的电催化氧化。 CVs结果表明，Ni / Al2O3对碱性电解质中的甲醇电氧化具有良好的电催化活性。 Ni / Al2O3的良好的甲醇电氧化活性可以归因于其在镍的高分散性和有序介孔结构之间的协同作用，该结构有利于甲醇和产物的扩散。 CV和CA结果表明甲醇电氧化是不可逆的过程，是扩散控制的过程。甲醇催化反应的速率常数经计算为1.66×106 cm3 mol–1 s-1。

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