Oxygen bulk diffusion and surface exchange in Sr-substituted La2NiO4 + δ

被引：38

作者：

Li, Zuoan ^{[1
]}

Haugsrud, Reidar ^{[1
]}

Norby, Truls ^{[1
]}

机构：

[1] Univ Oslo, Ctr Mat Sci & Nanotechnol, FERMiO, NO-0349 Oslo, Norway

来源：

SOLID STATE IONICS | 2011年 / 184卷 / 01期

关键词：

Oxygen diffusion; Defect chemistry; Surface exchange; Rate determining step (rds); La2NiO4 (+) (delta); La-2 (-) xSrxNiO4 (+ delta); TRANSPORT-PROPERTIES; LA2-XSRXNIO4+DELTA; CONDUCTIVITY; PERMEATION;

D O I：

10.1016/j.ssi.2010.10.009

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：

The oxygen bulk diffusion and surface exchange in Sr-substituted La2NiO4 (+) (delta) were investigated separately in this work. The oxygen flux through La2-xSrxNiO4 (+ delta) (x = 0.1 and 0.2) was measured as a function of temperature and the oxygen self diffusion coefficients. D-o, were extracted. The results show that the higher the Sr concentration, the lower the oxygen permeation and the higher the activation energy of D-o. The surface exchange rate was determined by measuring isotope exchange with a mass spectrometer. The Sr substitution leads to higher surface exchange rate with lower activation energy. The incorporation of ionized atomic oxygen into surface vacancies was suggested to be the rate determining step. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：42 / 46

页数：5

共 21 条

[1] Effect of Sr content on the crystal structure and electrical properties of the system La2-xSrxNiO4+δ (0 ≤ x ≤ 1) [J].

Aguadero, A. ;

Escudero, M. J. ;

Perez, M. ;

Alonso, J. A. ;

Pomjakushin, V. ;

Daza, L. .

DALTON TRANSACTIONS, 2006, (36) :4377-4383

[2] Oxygen transport properties of La2Ni1-xCuxO4+δ mixed conducting oxides [J].

Boehm, E ;

Bassat, JM ;

Steil, MC ;

Dordor, P ;

Mauvy, F ;

Grenier, JC .

SOLID STATE SCIENCES, 2003, 5 (07) :973-981

[3]

BURRIEL M, 2010, EUROPEAN FUEL CELL F

[4] X-RAY PHOTOELECTRON-SPECTROSCOPY, TEMPERATURE-PROGRAMMED DESORPTION AND TEMPERATURE-PROGRAMMED REDUCTION STUDY OF LANIO3 AND LA2NIO4+DELTA CATALYSTS FOR METHANOL OXIDATION [J].

CHOISNET, J ;

ABADZHIEVA, N ;

STEFANOV, P ;

KLISSURSKI, D ;

BASSAT, JM ;

RIVES, V ;

MINCHEV, L .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1994, 90 (13) :1987-1991

[5] Oxygen transport in La1-xSrxMn1-yCoyO3±δ perovskites part II.: Oxygen surface exchange [J].

De Souza, RA ;

Kilner, JA .

SOLID STATE IONICS, 1999, 126 (1-2) :153-161

[6] BAND-GAP CLOSING IN LA2-XSRXNIO4+DELTA [J].

GRANADOS, X ;

FONTCUBERTA, J ;

VALLETREGI, M ;

SAYAGUES, MJ ;

GONZALEZCALBET, JM .

JOURNAL OF SOLID STATE CHEMISTRY, 1993, 102 (02) :455-464

[7]

Kofstad P, 1972, NONSTOICHIOMETRY DIF, P81

[8] Transport properties and defect analysis of La1.9Sr0.1NiO4+δ [J].

Li, Zuoan ;

Haugsrud, Reidar ;

Smith, Jens B. ;

Norby, Truls .

SOLID STATE IONICS, 2009, 180 (26-27) :1433-1441

[9] Steady-State Permeation of Oxygen Through La1.9Sr0.1NiO4+δ [J].

Li, Zuoan ;

Haugsrud, Reidar ;

Smith, Jens B. ;

Norby, Truls .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2009, 156 (09) :B1039-B1044

[10] Oxygen incorporation into Fe-doped SrTiO3:: Mechanistic interpretation of the surface reaction [J].

Merkle, R ;

Maier, J .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2002, 4 (17) :4140-4148

← 1 2 3 →