OXIDATION-STATES OF FE IN LANI1-XFEXO3

被引：12

作者：

GOETA, AE ^{[1
]}

GOYA, GF ^{[1
]}

MERCADER, RC ^{[1
]}

PUNTE, G ^{[1
]}

FALCON, H ^{[1
]}

CARBONIO, R ^{[1
]}

机构：

[1] UNIV NACL CORDOBA,DEPT QUIM FIS,INFIQC,CORDOBA,ARGENTINA

来源：

HYPERFINE INTERACTIONS | 1994年 / 90卷 / 1-4期

关键词：

D O I：

10.1007/BF02069141

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The distributoin of oxidation states in perovskites of the type LaA(1-x)B(x)O(3) (A and B transition metal ions) can be ''tailored'' by x variation. In particular, in LaNiO3 it has been shown that Fe substitution for Ni feces some Ni3+ into Ni2+, while some Fe3+ changes into the unusual Fe4+ state. In addition, the existence of mixed oxidation states of Fe and/or Ni in LaNi1-x,FexO3 has been related to its catalytic activity in hydrogen peroxide decomposition. The Fe4+ population, obtained using Mossbauer spectroscopy, was found to be constant for all the analyzed annealing temperatures for x = 0.25 concentration, where the isomer shift difference for both states is the highest and the catalytic activity is maximum.

引用

页码：371 / 375

页数：5