P2.9.16 Deactivation mechanism of alumina supported Pt and Pd catalysts for gas sensor by hexamethyldisiloxane (HMDSO)

Event

14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany

Chapter

P2.9 Technology and Application

Author(s)

M. Nishibori - Kyushu University, Kasuga (Japan), K. Katoh - FIGARO ENGINEERING INC. (Japan), T. Itoh, N. Izu, W. Shin - National Institute of Advanced Industrial Science and Technology (AIST) (Japan)

Pages

1745 - 1747

DOI

10.5162/IMCS2012/P2.9.16

ISBN

978-3-9813484-2-2

Price

free

Abstract

The deactivation mechanism of Pt/gamma-alumina and Pd/gamma-alumina catalysts for gas sensor by hexamethyldisiloxane (HMDSO) exposure has been investigated. The chemical state and local structure of Pd in the catalysts has been characterized under the reduction and oxidation after HMDSO exposure by in situ X-ray absorption fine structure (XAFS) measurement. The Pd/gamma-alumina catalyst after HMDSO exposure hardly changed the chemical state of Pd even under the O2/N2 atmosphere though it oxidized easily under the O2/N2 atmosphere at the temperature of 300ºC.