Structural Changes of Cobalt-Based Perovskites upon Water Oxidation Investigated by EXAFS

被引：297

作者：

Risch, Marcel ^{[1
]}

Grimaud, Alexis ^{[1
]}

May, Kevin J. ^{[1
]}

Stoerzinger, Kelsey A. ^{[1
]}

Chen, Tina J. ^{[1
]}

Mansour, Azzam N. ^{[2
]}

Shao-Horn, Yang ^{[1
]}

机构：

[1] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA

[2] USN, Ctr Surface Warfare, Carderock Div, West Bethesda, MD 20817 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 17期

基金：

美国国家科学基金会;

关键词：

X-RAY-ABSORPTION; OXYGEN-EVOLVING CATALYST; FINE-STRUCTURE; ELECTRON-YIELD; EVOLUTION; ELECTROCATALYSIS; SPECTROSCOPY; DIFFRACTION; PHOSPHATE;

D O I：

10.1021/jp3126768

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：

While many perovskites. remain crystalline during the oxygen evolution reaction (OER) in alkaline media, some highly active perovskites become amorphous. We studied the local structure changes of perovskites LaCoO3, Ba0.5Sr0.5Co0.8Fe0.2O3-delta, and SrCo0.8Fe0.2O3-delta before and after OER by X-ray absorption spectroscopy. No change in either local structure or OER activity was observed for LaCoO3, while considerably enhanced OER activities and the conversion of the local structure from corner sharing octahedra to edge sharing octahedra were noted for Ba0.5Sr0.5Co0.8Fe0.2O3-delta and SrCo0.8Fe0.2O3-delta as a result of the OER. Possible processes responsible for the structural change and enhanced OER activities are discussed.

引用

页码：8628 / 8635

页数：8

共 36 条

[1] REEVALUATION OF X-RAY ATOMIC ENERGY LEVELS [J].

BEARDEN, JA ;

BURR, AF .

REVIEWS OF MODERN PHYSICS, 1967, 39 (01) :125-&

[2] THE ELECTROCATALYSIS OF OXYGEN EVOLUTION ON PEROVSKITES [J].

BOCKRIS, JO ;

OTAGAWA, T .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1984, 131 (02) :290-302

[3]

Bruce PG, 2012, NAT MATER, V11, P19, DOI [10.1038/nmat3191, 10.1038/NMAT3191]

[4] The Mechanism of Water Oxidation: From Electrolysis via Homogeneous to Biological Catalysis [J].

Dau, Holger ;

Limberg, Christian ;

Reier, Tobias ;

Risch, Marcel ;

Roggan, Stefan ;

Strasser, Peter .

CHEMCATCHEM, 2010, 2 (07) :724-761

[5] DIFFRACTION AND SPECTROSCOPIC STUDIES OF COBALTIC ACID SYSTEM HCOO2-DCOO2 [J].

DELAPLANE, RG ;

IBERS, JA ;

FERRARO, JR ;

RUSH, JJ .

JOURNAL OF CHEMICAL PHYSICS, 1969, 50 (05) :1920-+

[6] STRUCTURAL CLASSIFICATION AND PROPERTIES OF THE LAYERED OXIDES [J].

DELMAS, C ;

FOUASSIER, C ;

HAGENMULLER, P .

PHYSICA B & C, 1980, 99 (1-4) :81-85

[7] Nickel-borate oxygen-evolving catalyst that functions under benign conditions [J].

Dinca, Mircea ;

Surendranath, Yogesh ;

Nocera, Daniel G. .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2010, 107 (23) :10337-10341

[8] Elucidating the Domain Structure of the Cobalt Oxide Water Splitting Catalyst by X-ray Pair Distribution Function Analysis [J].

Du, Pingwu ;

Kokhan, Oleksandr ;

Chapman, Karena W. ;

Chupas, Peter J. ;

Tiede, David M. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (27) :11096-11099

[9] DEPTH DEPENDENCE FOR EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE SPECTROSCOPY DETECTED VIA ELECTRON YIELD IN HE AND IN VACUUM [J].

ELAM, WT ;

KIRKLAND, JP ;

NEISER, RA ;

WOLF, PD .

PHYSICAL REVIEW B, 1988, 38 (01) :26-30

[10] NEW OXYGENATED BRONZES OF FORMULA NA(X)COO2 (X LESS-THAN-OR-EQUAL-TO ONE) - COBALT-OXYGEN-SODIUM SYSTEM [J].

FOUASSIER, C ;

MATEJKA, G ;

REAU, JM ;

HAGENMULLER, P .

JOURNAL OF SOLID STATE CHEMISTRY, 1973, 6 (04) :532-537

← 1 2 3 4 →