Ni-Cu合金电极上苯甲醇的选择性电氧化

摘要

通过恒电流电沉积法在不同条件下制备了一系列Ni-Cu合金电极,采用扫描电镜(SEM)表征了其表面形态,用循环伏安法(CV)研究了在碱性溶液中苯甲醇在不同工艺条件下制备的Ni-Cu合金电极上的电氧化行为.并进一步用电化学原位红外光谱(in situ FTIP)从分子水平研究了苯甲醇在Ni-Cu合金电极上的电氧化过程.结果表明:在制备过程中电沉积时间为10 min,阴极电流密度为4 A·dm-2,电沉积温度为45℃下制备的电极具有最好的催化活性.Ni-Cu合金电极对苯甲醇表现出良好的催化活性和一定的化学稳定性.%The Ni-Cu alloy electrodes were prepared by constant current electrodeposition under different conditions. The morphology of Ni-Cu alloy was characterized by SEM. The selective electro-oxidation of benzyl alcohol in alkaline solution was studied with cyclic voltammograms and in-situ FTIR spectroscopy. The Ni-Cu alloy electrode showed the best electro-catalytic activity while the electrodeposition time was 10 min, cathode current density was 4 A · dm -2, and the electrodeposition temperatures was 45℃. Ni-Cu alloy electrodes showed excellent chemical stability and better catalytic activity than pure Ni or Cu electrode.