Effect of Thiourea on Nickel Deposition
- 化学化工－已发表论文 
[中文文摘]应用循环伏安和阻抗＿电位法研究了硫脲(TU)对玻碳电极和镀镍玻碳电极上镍沉积过程的影响.结果表明,在玻碳电极上镍的电沉积呈现明显的电化学成核机理,而在镀镍玻碳电极上则无此特征.TU的存在虽阻碍了Ni晶核的形成,但却能加速晶粒的生长.[英文文摘]Effect of thiourea on nickel deposition at glassy carbon and nickel_deposited glass carbon elect rodes w as invest igated w ith cyclic voltammograms and impetance_potent ial curves. It was found that the nucleat ion processes occurred at the glassy carbon elect rode. However, this characteristics disappeared at the nicked_deposited glassy carbon elect rode. It w as suggested that the presence of thiourea hindered the nucleation processes, yet accelerated g rain growth. Curves of impetance_potent ial could sensitively detect effect of thiourea on nickel depositon and reflect changes in rate_determining step w ith potential.