IMPEDANCE STUDIES OF POROUS LANTHANUM-PHOSPHATE-BONDED NICKEL ELECTRODES IN CONCENTRATED SODIUM-HYDROXIDE SOLUTION

被引：76

作者：

LOS, P ^{[1
]}

LASIA, A ^{[1
]}

MENARD, H ^{[1
]}

BROSSARD, L ^{[1
]}

机构：

[1] INST RECH HYDRO QUEBEC,VARENNES J3X 1S1,PQ,CANADA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1993年 / 360卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0022-0728(93)87007-I

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The hydrogen evolution reaction (HER) was investigated on a lanthanum-phosphate-bonded nickel (LPBN) powder electrode in 30 wt.% NaOH at 70-degrees-C using ac impedance and steady-state polarization techniques. Circuits containing one or two constant-phase elements (CPEs) in parallel with a resistance and corresponding to fractal and porous electrode models were tested in order to interpret the ac impedance data. The experimental impedance spectra were well described by the porous electrode model and the circuit containing two CPEs. The results obtained from the ac impedance and steady-state measurements allowed the mechanism and kinetics of the HER to be evaluated. Comparison of these parameters with those obtained on the polycrystalline nickel electrode in 1 M alkaline solution at 25-degrees-C indicates that an increase in activity is principally due to an increase in the real surface area.

引用

页码：101 / 118

页数：18

共 59 条

[1] HIGH-EFFICIENCY WATER ELECTROLYSIS IN ALKALINE-SOLUTION [J].