OXYGEN DISCHARGE ON NICKEL AND COBALT ANODES IN 30 W/O KOH AT 70-DEGREES-C IN THE PRESENCE OF DISSOLVED IRON AND VANADIUM

被引：21

作者：

BROSSARD, L

机构：

[1] Institut de recherche d'Hydro-Québec, Varennes, Que. J3X 1S1

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 1991年 / 16卷 / 02期

关键词：

D O I：

10.1016/0360-3199(91)90034-G

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxygen evolution reaction (OER) has been investigated on polished pure nickel and cobalt anodes in 30 w/o KOH at 70-degrees-C. The anodes were preanodized at an anodic current density i(a) of 5 or 0.44 A cm-2 for 20 min before the kinetic parameters of the OER were determined. The electrocatalytic activity decreases significantly in the case of cobalt anodes but remains pratically unaffected in the case of nickel anodes when i(a) is shifted from 0.44 to 5 A cm-2, in the case of prepurifed electrolytes. The behaviour of both substrates is slightly affected by the presence of 1 mM vanadium in the electrolyte. The presence of 0.25mM iron in the electrolyte strongly improves the OER due to (i) a significant decrease of the Tafel slope in case of Ni and (ii) an equally significant increase in the exchange-current density in the case of Co.

引用

页码：87 / 92

页数：6

共 19 条

[1]

[Anonymous], 1963, ATLAS EQUILIBRES ELE

[2] DISSOLUTION OF IRON IN CONCENTRATED ALKALI [J].

ARMSTRONG, RD ;

BAURHOO, I .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1972, 40 (02) :325-338

[3] INFLUENCE OF IRON IMPURITIES ON THE TIME-DEPENDENCE OF THE HYDROGEN EVOLUTION REACTION ON PLATINUM CATHODES DURING ELECTROLYSIS OF 30 W/O KOH [J].

BROSSARD, L ;

HUOT, JY .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1989, 19 (06) :882-888

[4] FORMATION OF HYDROUS OXIDE-FILMS ON COBALT UNDER POTENTIAL CYCLING CONDITIONS [J].

BURKE, LD ;

LYONS, ME ;

MURPHY, OJ .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1982, 132 (JAN) :247-261

[5] THE ELECTROCHEMICAL BEHAVIOR OF THE NICKEL-NICKEL OXIDE ELECTRODE .1. KINETICS OF SELF-DISCHARGE [J].

CONWAY, BE ;

BOURGAULT, PL .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1959, 37 (01) :292-307

[6] COMPARATIVE BEHAVIOR OF THE KINETICALLY SIGNIFICANT SURFACE INTERMEDIATE STATES IN ANODIC O-2 EVOLUTION AT OXIDE ELECTROCATALYST MATERIALS - PARTICIPATION OF MEDIATOR REDOX COUPLES IN THE OXIDE [J].

CONWAY, BE ;

LIU, TC .

MATERIALS CHEMISTRY AND PHYSICS, 1989, 22 (1-2) :163-182

[7] THE CATALYSIS OF THE OXYGEN EVOLUTION REACTION BY IRON IMPURITIES IN THIN-FILM NICKEL-OXIDE ELECTRODES [J].

CORRIGAN, DA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1987, 134 (02) :377-384

[8] ADVANCES IN WATER ELECTROLYZERS AND THEIR POTENTIAL USE IN AMMONIA PRODUCTION AND OTHER APPLICATIONS [J].

CRAWFORD, GA ;

BENZIMRA, S .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 1986, 11 (11) :691-701

[9]

DAVIDSON CR, 1980, J ELECTROCHEM SOC, V5, P1060

[10] INSITU UV VISIBLE REFLECTANCE SPECTROSCOPIC INVESTIGATION OF THE NICKEL ELECTRODE ALKALINE-SOLUTION INTERFACE [J].

HAHN, F ;

BEDEN, B ;

CROISSANT, MJ ;

LAMY, C .

ELECTROCHIMICA ACTA, 1986, 31 (03) :335-342

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