Ni(OH)₂ doped with cerium cations was synthesized by a hydrothermal method and its electrochemical, photoelectrochemical and photocatalytic behavior was determined by the corresponding suitable techniques. Ni(OH)₂ films doped with different Ce proportions were evaluated in a KOH support electrolyte solution by cyclic voltammetry. Scan-rate dependent voltammograms displayed pseudo-capacitive behavior while the charge transfer resistance of Ce-doped samples was determined through electrochemical impedance spectroscopy. The calculated charge transfer resistance value was 132 Ω for Ni(OH)₂ containing 350 μmoles of Ce. Chronoamperometry under intermittent UV light was employed to measure the photo-response of nanomaterials. The experimental results indicated that the photocurrent of Ni(OH)₂ containing 350 µmoles of Ce was ten times greater than that of pure Ni(OH)₂. Photocatalytic activity of the powders was demonstrated under UV light irradiation accomplishing 83% of methyl orange degradation after 140 min of reaction with pseudo-first-order kinetics and the calculated degradation rate constant was 0.0125 min^− 1. The results evidenced the electrochemical, photoelectrochemical and photocatalytic activity of the synthesized materials, which sets them as suitable materials for a wide range of promising photo-based applications.

采用水热法合成了掺有铈阳离子的Ni（OH）₂，并采用相应的合适技术确定了其电化学，光电化学和光催化性能。通过循环伏安法在KOH载体电解质溶液中评价掺杂有不同Ce比例的Ni（OH）₂膜。扫描速率依赖性伏安图显示伪电容行为，而掺杂Ce的样品的电荷转移电阻通过电化学阻抗谱确定。对于Ni（OH）₂，计算得出的电荷转移电阻值为132Ω含有350微摩尔的铈 间歇紫外光下的计时安培法用于测量纳米材料的光响应。实验结果表明，含有350μmolCe的Ni（OH）₂的光电流是纯Ni（OH）_2的10倍。证明了该粉末在紫外光照射下的光催化活性，反应140分钟后以拟一级动力学完成了83％的甲基橙降解，计算的降解速率常数为0.0125 min ^-1。结果证明了合成材料的电化学，光电化学和光催化活性，这使它们成为适用于广泛的有前景的基于光的应用的材料。