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Effect of γ-Radiation on Physico-Chemical Properties of Lanthanum Cobaltate (LaCoO3)

Published online by Cambridge University Press:  25 February 2011

B. Srinivas ,
V.R.S. Rao  and
J.C. Kuriacose
B. Srinivas
Affiliation:
Department of Chemistry, Indian Institute of Technology, Madras, India 600036
V.R.S. Rao
Affiliation:
Department of Chemistry, Indian Institute of Technology, Madras, India 600036
J.C. Kuriacose
Affiliation:
Department of Chemistry, Indian Institute of Technology, Madras, India 600036
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Abstract

The influence of γ-radiation on LaCoO3, for the catalytic decomposition of H2O2 has been studied. ESR and XPS studies of γ-irradiated LaCoO3, snowed, the formation of chemisorbed oxygen (O2) and reduction of Co2+ to Co . γ-irradia]:ion of LaCoO3. causes a decrease in electrical conductivity due to the trapping of charge carriers by the chemisorbed oxygen. SEM photographs of the Y-irradiated sample pellets reveal surface cracks and surface corrosion due to the diffusion of transition metal to surface. The enhancement in the catalytic activity for the decomposition of H2O2 is found to be directly proportional to the reduced metal content.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 611
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1 Voorhoeve, R.J.H., Johnson, D.W. Jr, Remeika, J.P. and Gallagher, P.K., Science, 195, 827 (1977).Google Scholar
2. Taylor, E.H., Advan. Catal., 18, 111 (1968).Google Scholar
3 Gallagher, P.K., Mat. Res. Bull., 3, 225 (1968).Google Scholar
4 Che, M. and Teuch, A.J., Advan. Catal., 32, 11 (1983).Google Scholar
5 Burness, J.H., Dillard, J.G. and Taylor, L.T., J. Am. Chem. Soc, 97, 6080 (1975).Google Scholar
6 Wysocki, S. and Sugier, , Radiochem, Radioanal. Lett., 40(5), 277 (1979).Google Scholar
7 Maxim, I. and Braun, T., J. Phys. Chem. Solids., 24, 537 (1963).Google Scholar
8 Srinivas, B., Rao, V.R.S. and Kuriacose, J.C., J. Radioanal. Nucl. Chem. Lett., 107(4), 225 (1986).Google Scholar