Ni-Co合金电极在碱性介质中的伏安行为及其电催化性能

Ni-Co合金电极在碱性介质中的伏安行为及其电催化性能 Voltammetric Behavior of Ni-Co Alloy Electrode and Its Catalytic Action to Glucose Oxidation 曾百肇 ZENG Bai-zhao 1 2 first-author 魏淑红 WEI Shu-hong 1 2 赵发琼 ZHAO Fa-qiong 1 2 邹巧莉 ZOU Qiao-li 1 2 武汉大学化学与分子科学学院 武汉大学化学与分子科学学院 College of Chemistry and Molecule Sciences,Wuhan University College of Chemistry and Molecule Sciences,Wuhan University 武汉大学化学与分子科学学院,湖北,武汉,430072 武汉大学化学与分子科学学院,湖北,武汉,430072 研究了电沉积法制备的Ni Co合金电极在0.1 mol/L NaOH溶液中的伏安行为,并对Ni电极和Co电极的伏安行为进行了探讨.研究发现Ni Co合金电极在0.1 mol/L NaOH溶液中,分别在0.30 V和0.45 V左右产生两个氧化峰,它们分别是由Co（Ⅲ）与Co（Ⅳ）以及Ni （Ⅱ）与Ni（Ⅲ）的相互转化引起的.同时,以部分生物小分子为研究对象,详细讨论了葡萄糖等物质在电极表面的催化氧化行为.结果表明,3 种电极对葡萄糖的氧化都有一定的催化作用;其中Ni Co电极的催化作用最强,这是由于Ni （Ⅱ）/Ni（Ⅲ）和Co （Ⅱ）/Co（Ⅲ）两个氧化还原电对的协同催化作用所致;当合金电极中Ni的含量增加时,Ni Co合金电极产生的氧化峰增高,其催化作用则随着合金电极中Co含量的增加而增强. Ni-Co alloy electrode was prepared by electrodeposition. The voltammetric behavior of Ni-Co alloy electrode in 0.1 mol/L NaOH was also investigated. It was found that Ni-Co alloy electrode exhibited two anodic peaks at 0.3 V and 0.5 V respectively. This could be attributed to the transformation of Ni （Ⅱ）/Ni（Ⅲ） and Co（Ⅲ）/Co（Ⅳ）. Meanwhile, the electrocatalytic behavior of some biological molecules on the Ni-Co alloy electrode, glucose especially, was discussed. When glucose is present, the Ni-Co alloy electrode shows greater catalytic effect for glucose oxidation than pure Ni electrode and Co electrode. This was probably because of the synergistic electrocatalytic benefit from the combined properties of Ni and Co. When the content of Ni of Ni-Co alloy electrode increased, the anodic peak current became higher; while the electrocatalytic effect was greater with the increasing of the content of Co. 伏安行为 电催化 NiCo合金电极 生物小分子 葡萄糖 voltammetric behavior electrocatalysis Ni-Co alloy electrode biological molecule glucose O657.1 国家自然科学基金资助项目（20173040） 2005-02-01 2021-04-01 2