ANALYSIS OF HYDRATION NUMBER IN COBALT OXYHYDROXIDE FILMS USING THE QUARTZ-CRYSTAL MICROBALANCE

被引：10

作者：

MATSUMOTO, Y ^{[1
]}

BANDO, N ^{[1
]}

HOMBO, J ^{[1
]}

SASAKI, T ^{[1
]}

机构：

[1] AGCY IND SCI & TECHNOL,NATL INST MAT & CHEM RES,TSUKUBA,IBARAKI 305,JAPAN

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 395卷 / 1-2期

关键词：

HYDRATION NUMBER; COBALT OXYHYDROXIDE FILMS; QUARTZ CRYSTAL MICROBALANCE;

D O I：

10.1016/0022-0728(95)03978-P

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The hydration numbers n of the deposited cobalt oxyhydroxide (CoOOH . nH(2)O) films were measured using an in-situ quartz crystal microbalance, and the effect of the La3+ ion on the hydration was studied. The hydration number of the deposited film was very high during the initial stage of the electrolysis (n > 10), but decreased to a constant value. The constant values of the hydration number were about 3 and 1 for CoOOH . nH(2)O films deposited in Co(CH3COO)(2) and in other solutions (Co(NO3)(2), CoCl2, CoSO4) respectively. The anion effect of CH3COO- on hydration was discussed. The incorporation of an La3+ ion increased the hydration number by about 5. Consequently, CoOOH . nH(2)O . La3+. 5H(2)O was proposed for the composition of the deposited cobalt oxyhydroxide film containing La3+ (atomic ratio La/Co = 1). The combination state of La3+ in this composition was also discussed.

引用

页码：45 / 49

页数：5

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