In situ QXAFS observation of the reduction of Fe2O3 and CaFe2O4

被引：9

作者：

Kimura, Masao ^{[1
]}

Uemura, Yohei ^{[2
]}

Takayama, Toru ^{[1
]}

Murao, Reiko ^{[1
]}

Asakura, Kiyotaka ^{[3
]}

Nomura, Masaharu ^{[1
]}

机构：

[1] Nippon Steel Corp Ltd, Futtsu 2930011, Japan

[2] Photon Factory, Tsukuba, Ibaraki, Japan

[3] Hokkaido Univ, Sapporo, Hokkaido 060, Japan

来源：

15TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS15) | 2013年 / 430卷

关键词：

D O I：

10.1088/1742-6596/430/1/012074

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In situ QXAFS studies of the reduction of alpha-Fe2O3 and CaFe2O4 were conducted to determine their reduction kinetics and mechanisms. The reduction of alpha-Fe2O3 involved two steps, the first being a very fast process in which Fe3+ was reduced to Fe2+, and the second being the reduction of Fe2+ to Fe metal over a longer period. In contrast, the reduction of Fe in CaFe2O4 was a single first-order reaction, although an induction period was clearly observed at the beginning of the reduction process. The reduction processes were successfully studied using a combination of in situ QXAFS spectra at the Ca and Fe K-edges.

引用

页数：4

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