P2.9.16 Deactivation mechanism of alumina supported Pt and Pd catalysts for gas sensor by hexamethyldisiloxane (HMDSO)
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P2.9 Technology and Application
- 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)
- 1745 - 1747
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.