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在强碱性溶液中低电压低电流条件下在W基底上经阳极氧化得到致密WO3层,而后在酸性条件下在WO3表面经光辅助电化学还原沉积镍,所获得的复合电极具有优异的光电化学氧化水的活性和稳定性.SEM,EDX,XPS和TEM等表征表明复合电极中具有体心立方结构的W基底经阳极氧化形成了具有单斜结构的WO3层,表面修饰的镍物种以Ni(OH)2形式存在.光电化学实验表明WO3层对可见光具有良好的光响应,表面修饰镍后,光电氧化水的起始电位显著降低,电极的稳定性也得以提高.
A dense WO3 layer was obtained by anodization on a W substrate under a condition of low voltage and low current in a strong alkaline solution and then nickel was electrolessly reduced by electro-chemical reduction on the surface of the WO3 under acidic conditions. The obtained composite electrode has excellent photoelectric Chemical oxidation of water activity and stability.SEM, EDX, XPS and TEM characterization of the composite electrode has a body-centered cubic structure of the W substrate was anodized to form a monoclinic WO3 layer, the surface of the nickel species with Ni (OH) 2 photoelectrochemical experiments show that the WO3 layer has a good photoresponse of visible light, surface modification of nickel, the photoelectrochemical oxidation of water significantly reduced the starting potential, the electrode stability has also been improved.