Effect of co-doping on proton conductivity in perovskite oxides BaZr0.9In0.05M0.05O3−δ (M = Yb3+ or Ga3+)
Journal article, 2010

BaZr0.9In0.05M0.05O3-d (M ¼ Ga3+ or Yb3+) has been prepared by solid-statesynthesis route. Rietveld analysis of neutron powder diffraction data on as-prepared samples showed that both samples crystallise in the cubic space group Pm-3m. Scanning electron microscopy analysis showed that the grains intheBaZr0.9In0.05Ga0.05O3-d sample were larger than the BaZr0.9In0.05Yb0.05O3-d sample. Dynamic thermogravimetric analysis indicates that the proton concentration was higher inpre-hydrated BaZr0.9In0.05Ga0.05O3-d sample (40%of theoretical)than that of BaZr0.9In0.05Yb0.05O3-d sample (28%oftheoretical).Proton conductivity was studied on pre-hydrated samples(under both dry and wetAr atmospheres).The bulk proton conductivities of the heating cycle of pre-hydrated BaZr0.9In0.05M0.05O3-d (M ¼ Ga3+ or Yb3+) samples were 2.1 * 10-5 S cm-1 and 1.9 * 10-4 S cm-1 at 350C, respectively.The effect of co-doping onproton conductivity was investigated and the results are compared with single doped systems e.g. BaZr0.9M0.1O3-d (M=Ga3+, In3+ or Yb3+) samples.

Neutron diffraction

TGA

Proton conductor

Impedance spectroscopy

Rietveld analysis

SEM

Author

Istaq Ahmed

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Seikh Mohammad Habibur Rahman

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Patrick Steegstra

University of Gothenburg

Stefan Norberg

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Sten Eriksson

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Elisabet Ahlberg

University of Gothenburg

Christopher Knee

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Stephen Hull

ISIS Facility

International Journal of Hydrogen Energy

0360-3199 (ISSN)

Vol. 35 12 6381-6391

Subject Categories

Inorganic Chemistry

Other Materials Engineering

DOI

10.1016/j.ijhydene.2010.03.101

More information

Created

10/7/2017