Effect of co-doping on proton conductivity in perovskite oxides BaZr0.9In0.05M0.05O3-δ (M = Yb3+ or Ga3+)

被引：11

作者：

Ahmed, Istaq ^{[1
,2
]}

Rahman, Seikh M. H. ^{[1
]}

Steegstra, Patrick ^{[3
]}

Norberg, Stefan T. ^{[1
,2
]}

Eriksson, Sten-G. ^{[1
]}

Ahlberg, Elisabet ^{[3
]}

Knee, Chris S. ^{[3
]}

Hull, Stephen ^{[2
]}

机构：

[1] Chalmers Univ Technol, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] Univ Gothenburg, Dept Chem, SE-41296 Gothenburg, Sweden

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 12期

基金：

瑞典研究理事会;

关键词：

Neutron diffraction; Rietveld analysis; TGA; SEM; Proton conductor; Impedance spectroscopy; TRANSPORT-PROPERTIES; CHEMICAL-STABILITY; STRONTIUM; HYDROGEN; CONDUCTORS; DOPANT;

D O I：

10.1016/j.ijhydene.2010.03.101

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：

BaZr0.9In0.05M0.05O3-delta (M = Ga3+ or Yb3+) has been prepared by solid-state synthesis route. Rietveld analysis of neutron powder diffraction data on as-prepared samples showed that both samples crystallise in the cubic space group Pm (3) over barm. Scanning electron microscopy analysis showed that the grains in the BaZr0.9In0.05Ga0.05O3-delta sample were larger than the BaZr0.9In0.05Yb0.05O3-delta sample. Dynamic thermogravimetric analysis indicates that the proton concentration was higher in pre-hydrated BaZr0.9In0.05Ga0.05O3-delta sample (40% of theoretical) than that of BaZr0.9In0.05Yb0.05O3-delta sample (28% of theoretical). Proton conductivity was studied on pre-hydrated samples (under both dry and wet Ar atmospheres). The bulk proton conductivities of the heating cycle of pre-hydrated BaZr0.9In0.05M0.05O3-delta (M = Ga3+ or Yb3+) samples were 2.1 x 10(-5) S cm(-1) and 1.9 x 10(-4) S cm(-1) at 350 degrees C, respectively. The effect of co-doping on proton conductivity was investigated and the results are compared with single doped systems e.g. BaZr0.9M0.1O3-delta (M = Ga3+, In3+ or Yb3+) samples. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：6381 / 6391

页数：11

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