title: Characterization of Pt-doped SnO2 catalyst for a high-performance micro gas sensor.
abstract: The atomic scale structure and its dependence on Pt concentration of a Pt-doped SnO2 (Pt-SnO2) thin film produced by a sputter-deposition method was investigated, which showed high-performance as a methane gas sensor. Extended X-ray absorption fine structure (EXAFS) and X-ray diffraction (XRD) analyses showed that Pt-SnO2 has a rutile structure similar to SnO2 crystals at less than 10 at% Pt where the Pt ion was located at the Sn position in the rutile structure. There was no evidence that Pt metal clusters were formed in the Pt-SnO2 films. The Pt-SnO2 structure became amorphous at greater than 11 at% Pt. We found a good correlation between the methane activity and local structure of Pt.
authors.affiliation: Corporate R & D Headquarters, Fuji Electric Co., Ltd., Tokyo 191-8502, Japan.
authors.forename: Naoyoshi
authors.initials: N
authors.lastname: Murata
authors.forename: Takuya
authors.initials: T
authors.lastname: Suzuki
authors.forename: Makoto
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Togoh
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Asakura