INFLUENCE OF PHYSICOCHEMICAL PROPERTIES OF ALKALINE-SOLUTIONS AND TEMPERATURE ON THE HYDROGEN EVOLUTION REACTION ON POROUS LANTHANUM-PHOSPHATE-BONDED NICKEL ELECTRODES

被引：5
作者：
DUMONT, H [1 ]
LOS, P [1 ]
BROSSARD, L [1 ]
MENARD, H [1 ]
机构：
[1] INST RECH HYDRO QUEBEC,VARENNES J3X 1S1,PQ,CANADA
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 05期
关键词：
D O I：
10.1149/1.2054900
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A steady-state method and ac impedance spectroscopy were used to investigate the hydrogen evolution reaction (HER) on porous lanthanum-phosphate-bonded nickel (LPBN) electrodes in 9M NaOH and KOH solutions at temperatures ranging from 20 to 70-degrees-C. The Tafel slopes, exchange current densities, and overpotentials at a current density of 250 mA/cm2 were obtained from steady-state measurements. The ac,impedance data were analyzed using the porous-electrode model, and the kinetic parameters of the HER and double-layer capacitances were determined. The pore length was deduced to be 64 to 73 mum compared to 1 mum for the diameter. The effect of temperature and the nature of the electrolyte on the intrinsic electrocatalytic activity of the LPBN electrodes are discussed.
引用
收藏
页码：1225 / 1231
页数：7
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