XRD studies of nickel hydride formation in alkaline solutions containing a promotor

被引：2

作者：

Juskenas, R ^{[1
]}

Valsiunas, I ^{[1
]}

Jasulaitiene, V ^{[1
]}

Pakstas, V ^{[1
]}

机构：

[1] Inst Chem, Dept Mat Sci, Canberra, ACT 2600, Australia

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 26期

关键词：

nickel; hydride; alkaline; X-ray diffraction;

D O I：

10.1016/S0013-4686(02)00447-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An effect of cathodic charging conditions on the amount of the beta-NiHx phase formed in nickel electrode in alkaline solutions was studied by means of X-ray diffraction technique. Electrolytic nickel coatings on copper substrate were hydrogenated in KOH, NaOH, LiOH and NH4OH solutions containing promoters such as As2O3, Sb and GeO2. Dependences of the beta-NiHx phase volume fraction on the promotor concentration, charging current density and charging duration were studied. Optimal values of these charging conditions parameters were determined. The volume fraction of the beta-NiHx phase amounted up to similar to56% of 10 mum thick nickel coating. The quantity of nickel hydride did not depend on the alkali and its concentration. Promoters were arranged in the following order of effectiveness in causing nickel hydride formation: S > As > Sb > Ge. It was suggested that NiAs type compounds could take part in the nickel hydride formation. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：4239 / 4243

页数：5

共 32 条

[1] FREE ENERGY AND ENTROPY OF FORMATION OF NICKEL HYDRIDE [J].

BARANOWSKI, B ;

BOCHENSKA, K .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-FRANKFURT, 1965, 45 (3-4) :140-+

[2] Electrochemical formation of nickel hydride in alkaline solutions [J].

Baranowski, B .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 472 (02) :182-184

[3]

BARANOWSKI B, 1959, B ACAD POLON SC, V7, P663

[4]

Baranowski B., 1964, ELECTROCHIM ACTA, V9, P1497, DOI [10.1016/S0013- 4686(64)80001-3, DOI 10.1016/S0013-4686(64)80001-3]

[5]

Barrett C., 1980, STRUCTURE METALS

[6]

Bernardini M, 1998, J ELECTROANAL CHEM, V442, P125, DOI 10.1016/S0022-0728(97)00492-0

[7] Formation of nickel hydrides by hydrogen evolution in alkaline media: effect of temperature [J].

Bernardini, M ;

Comisso, N ;

Mengoli, G ;

Sinico, L .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1998, 457 (1-2) :205-219

[8] A NOTE ON NICKEL HYDRIDE [J].

BONISZEWSKI, T ;

SMITH, GC .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1961, 21 (1-2) :115-&

[9] STUDY OF THE KINETICS OF HYDROGEN EVOLUTION REACTION ON RANEY-NICKEL COMPOSITE-COATED ELECTRODE BY AC IMPEDANCE TECHNIQUE [J].

CHOQUETTE, Y ;

BROSSARD, L ;

LASIA, A ;

MENARD, H .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1990, 137 (06) :1723-1730

[10] STUDY OF A DECOMPOSING HYDRIDE PHASE AT NICKEL CATHODES BY MEASUREMENT OF OPEN-CIRCUIT POTENTIAL DECAY [J].

CONWAY, BE ;

ANGERSTEINKOZLOWSKA, H ;

SATTAR, MA ;

TILAK, BV .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1983, 130 (09) :1825-1836

← 1 2 3 4 →