title: Structural analyses by TEM of iridium deposited on TiO2 powder and rutile single crystal.
abstract: It was found by transmission electron microscopy (TEM) that deposition precipitation of Ir onto TiO2 powder (Degussa P-25) produced Ir particles preferentially on the rutile phase. Iridium oxide particles supported on rutile TiO2 single crystal by deposition precipitation were also observed by TEM and scanning electron microscopy, and were found to exist as thin films of a few atoms. A structural change caused by hydrogen reduction was observed using high-resolution TEM and this was confirmed to be the iridium oxide film being reduced to metallic iridium particles.
authors.affiliation: Special Division for Green Life Technology, National Institute of Advanced Industrial Science and Technology, Midorigaoka 1-8-31, Ikeda, Osaka 563-8577, Japan. t-akita@aist.go.jp
authors.forename: Tomoki
authors.initials: T
authors.lastname: Akita
authors.forename: Mitsutaka
authors.initials: M
authors.lastname: Okumura
authors.forename: Koji
authors.initials: K
authors.lastname: Tanaka
authors.forename: Susumu
authors.initials: S
authors.lastname: Tsubota
mesh_terms: D003460:Crystallization; D007495:Iridium / Q000737:chemistry*; D008854:Microscopy, Electron; D010084:Oxidation-Reduction; D010316:Particle Size; D011208:Powders; D013057:Spectrum Analysis; D014025:Titanium / Q000737:chemistry*
chemical_list: D011208:Powders; C009495:titanium dioxide; D007495:Iridium; D014025:Titanium