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Monoclinic ZrO2 and its supported materials Co/Ni/ZrO2 for N2O decomposition

Published online by Cambridge University Press:  03 March 2011

H.C. Zeng ,
J. Lin ,
W.K. Teo ,
J.C. Wu  and
K.L. Tan
H.C. Zeng*
Affiliation:
Department of Chemical Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511, Singapore
J. Lin
Affiliation:
Department of Physics, Faculty of Science, National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511, Singapore
W.K. Teo
Affiliation:
Department of Chemical Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511, Singapore
J.C. Wu
Affiliation:
Department of Chemical Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511, Singapore
K.L. Tan
Affiliation:
Department of Physics, Faculty of Science, National University of Singapore, 10 Kent Ridge Crescent, Singapore 0511, Singapore
*
a)Address correspondence to this author.
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Abstract

Monoclinic ZrO2 and its supported materials Co/Ni/ZrO2 (Co:Ni = 1:1) for catalytic decomposition of N2O have been studied with GC, FTIR, EDAX, XPS, and the evaluation of catalytic activity of the materials. It is found that monoclinic ZrO2 alone has the catalytic effect for N2O decomposition, although higher activities are found for Co/Ni/ZrO2 systems. XPS study shows that only Co exists in the surface region of ZrO2, which is attributed to the formation of NiO–ZrO2 solid solution resulting from an interdiffusion between Ni2+ and ZrO2 matrix. The gas decomposition on Co/Ni/ZrO2 can be described as first order with respect to partial pressure of N2O. Surface reactions on ZrO2 and Co/Ni/ZrO2 will also be addressed.

Type
Environmentally Benign Materials and Processes
Information
Journal of Materials Research , Volume 10 , Issue 3 , March 1995 , pp. 545 - 552
Copyright
Copyright © Materials Research Society 1995

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References

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