ANISOTROPIC STRUCTURE-ANALYSIS FOR COBALT OXIDES ON ALPHA-AL2O3 (0001) BY POLARIZED TOTAL-REFLECTION FLUORESCENCE EXTENDED X-RAY ABSORPTION FINE-STRUCTURE

被引:26
作者
SHIRAI, M [1 ]
ASAKURA, K [1 ]
IWASAWA, Y [1 ]
机构
[1] UNIV TOKYO,FAC SCI,DEPT CHEM,7-3-1 HONGO,BUNKYO KU,TOKYO 113,JAPAN
关键词
POLARIZED TOTAL-REFLECTION FLUORESCENCE EXAFS; COBALT OXIDES ON ALPHA-AL2O3 (0001); ANISOTROPIC STRUCTURE ANALYSIS; OXIDATION CATALYST MODEL;
D O I
10.1007/BF00765268
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
Anisotropic structure analyses for [CoO(x)]/alpha-Al2O3 (0001) and [Co3O4]n/alpha-Al2O3 (0001) which were derived from Co2(CO)8/alpha-Al2O3 (0001) were performed by a polarized total-reflection fluorescence extended X-ray absorption fine structure (EXAFS) technique. Both s- and p-polarized EXAFS data revealed that the cobalt atoms of [CoO(x)] were located on three-fold hollow sites of alpha-Al2O3 (0001) in a monomer form and that a thin spinel structure [Co3O4] grew with the (001) plane parallel to alpha-Al2O3 (0001).
引用
收藏
页码:247 / 254
页数:8
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