pH dependence of the composition of electrodeposited Co films in aqueous sulfate solutions

被引：0

作者：

M. Lafouresse

A. Medvedev

K. Kutuso

W. Schwarzacher

A. Masliy

机构：

[1] University of Bristol,Royal Fort

[2] Russian Academy of Sciences,Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch

来源：

Russian Journal of Electrochemistry | 2007年 / 43卷

关键词：

electrodeposition; cobalt; pH value;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The electrodeposition of cobalt onto gold is studied as a function of the pH of the electrolyte. Electrochemical quartz crystal microgravimetry is used to identify the material deposited. Using a Co sulfate solution without additives, it is found that for pH <-3.2, Co metal deposits. For pH > 3.2 and at sufficiently negative applied potential, first Co hydroxide deposits and then Co metal. The addition of boric acid, H3BO3 to cobalt sulfate solutions leads to different results: measurements done up to pH 5.5 indicate that only Co metal deposits, showing that boric acid prevents the formation of cobalt hydroxide.

引用

页码：856 / 858

页数：2