Elucidating the Domain Structure of the Cobalt Oxide Water Splitting Catalyst by X-ray Pair Distribution Function Analysis

被引：144

作者：

Du, Pingwu ^{[1
]}

Kokhan, Oleksandr ^{[1
]}

Chapman, Karena W. ^{[2
]}

Chupas, Peter J. ^{[2
]}

Tiede, David M. ^{[1
]}

机构：

[1] Argonne Natl Lab, Adv Photon Source, Chem Sci & Engn Div, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 27期

关键词：

CRYSTAL-STRUCTURE; PHOSPHATE; OXIDATION; CHEMISTRY; RESOLUTION; COMPLEX;

D O I：

10.1021/ja303826a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pair distribution function (PDF) analysis was applied for structural characterization of the cobalt oxide water-splitting catalyst films using high energy X-ray scattering. The catalyst was found to be composed of domains consistent with a cobalt dioxide lattice sheet structure, possibly containing a Co4O4 cubane-type "defect". The analysis identifies the film to consist of domains composed of 13-14 cobalt atoms with distorted coordination geometries that can be modeled by alteration in terminal oxygen atom positions at the domain edge. Phosphate is seen as a disordered component in the films. This work establishes an approach that can be applied to study the structure of in situ cobalt oxide water-splitting film under functional catalytic conditions.

引用

页码：11096 / 11099

页数：4

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