普鲁士蓝薄膜的电积法制备及其化学组成

PREPARATION OF PRUSSION BLUE FILM WITH ELECTRODEPOSION METHODS AND ITS COMPOSITION

在金属和石墨基底电极上用恒电位沉积法制备出普鲁士蓝(PB)薄膜,研究了影响膜生长的多种因素;观察到PB膜的电化学活性。用红外光谱及电子能谱对膜的化学组成作了分析,结果表明,最初制备的膜为不溶性PB:Fe_4[Fe(CN)_6]_3,在含K^+的电解质溶液中经电化学反应后膜部分转变为可溶性PB:KFeFe(CN)_6,由此确定了PB膜的电化学反应式。

A thin film of Prussion Blue(PB) is electrodeposited on the metal or graphite substrates. Many factors affecting growth of the film are investigated. PB film is found to be electrochemically active. IR and XPS measurements on PB film are performed. It is shown that the initially formed film is insoluble, after the electrochemical reaction in a electrolytic solution containing potassium ions it is converted to soluble. According to the result we suggest the equation of the electrochemical reaction of PB film.