Reduction and Diffusion of Cr-Oxide Layers into P25, BaLa4Ti4O15, and Al:SrTiO3 Particles upon High-Temperature Annealing

• DOI: 10.1021/acsami.3c00250
• Publication Date: 2023-03-12T19:48:30Z
• Authors: Abdulrahman S. Al...; Thomas D. Small; Yanting Yin; D. J. Osborn; Shuhei Ozaki; Yuki Kataoka; Yuichi Negishi; Kazunari Domen; Gregory F. Metha; Gunther G. Andersson
• Keywords: Rutile

Chromium oxide (Cr2O3) is a beneficial metal used to prevent the backward reaction in photocatalytic water splitting. The present work investigates stability, oxidation state, and bulk surface electronic structure of Cr-oxide photodeposited onto P25, BaLa4Ti4O15, Al:SrTiO3 particles as function annealing process. state layer deposited found be Cr2O3 on P25 Cr(OH)3 BaLa4Ti4O15. After at 600 °C, for (a mixture rutile anatase TiO2), diffuses into phase but remains phase. For converts upon slightly particles. However, Al:SrTiO3, stable diffusion here due strong metal-support interaction effect. In addition, some reduced metallic Cr after annealing. effect formation band gaps investigated with spectroscopy, electron diffraction, DRS, high-resolution imaging. implications stability splitting are discussed.