Electro-Deposition of Ni-La Film in Urea-NaBr Melt and Its Hydrogen Evolution Properties
The Ni-La alloy was electro-deposited in urea-NaBr melt. The codeposition behavior and effect of the cathodic current density on the coating composition were examined. As a result, lanthanum codeposited with nickel to form Ni-La alloy under the inducement effect of nickel. With the increase of the cathodic current density, the content of lanthanum of the deposit rose at first, then decreased, and reached the maximal value (10.3％ (atom fraction)) at the current density 15mA·cm-2. The crystallization behavior of Ni <,89.7>La<,10.3> coating was investigated by means of differential scanning calorimetry and X-ray diffraction. The structure of Ni <,89.7>La<,10.3> as-plated coating was amorphous phase. The amorphous phase was converted into center cubic close packed Ni- La (F<,m3m>) solid solution at 469.8℃. The electro-catalytic activity of hydrogen evolution of Ni<,89.7>La<,10.3> coating was studied using electrochemical experiments, the results showed that the electro- catalytic activity of hydrogen evolution of Ni<,89.7> La<,10.3> coating was better than that of nickel.
Ni-La film electro-deposition urea-NaBr hydrogen evolution rare earths
Wang Senlin(王森林) Zhang Yan(张雁)
Department of Applied Chemistry,College of Materials Science and Engineering, Huaqiao University, Qu Department of Applied Chemistry, College of Materials Science and Engineering, Huaqiao University, Q
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
565-569
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）