X-RAY-ABSORPTION FINE-STRUCTURE SPECTRA AND THE OXIDATION-STATE OF NICKEL IN SOME OF ITS OXYCOMPOUNDS

被引：77

作者：

MANSOUR, AN ^{[1
]}

MELENDRES, CA ^{[1
]}

PANKUCH, M ^{[1
]}

BRIZZOLARA, RA ^{[1
]}

机构：

[1] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 06期

关键词：

D O I：

10.1149/1.2054990

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

XANES spectra of nickel K-edge and x-ray diffraction patterns of several nickel oxycompounds were measured. The shift in energy of the Ni K-absorption edge toward higher values correlates well with the increase in the oxidation state of nickel from +2 to +4 in the compounds studied. The inflection point energy of the Ni pre-edge structure shifts approximately 1 eV per unit change in valency. Our results provide evidence which supports the assignment that the valency of Ni in beta-NiOOH is +3; Ni3O2(OH)4 and commercial nickel peroxide (NiO2) likewise contain trivalent nickel. The edge shift for quadrivalent nickel in KNilO6 is reported for the first time.

引用

页码：L69 / L71

页数：3

共 11 条

[1] NICKEL HYDROXIDE ELECTRODE .4. CRYSTAL STRUCTURE STUDY OF HIGHLY OXIDIZED GAMMA1 NICKEL HYDROXIDE [J].