Abstract
The structural change of Ir/SiO 2 and Ir-ReO x/SiO 2 during the temperature programmed reduction with H 2 was investigated using in situ Ir L 3-edge and Re L 3-edge quick-scanning X-ray absorption fine structure in the combination of temperature programmed reduction with H 2, XRD, the measurement of CO adsorption, Raman spectroscopy, and X-ray photoelectron spectroscopy. The metal oxide on Ir-ReO x/SiO 2 was much more easily reduced than that on monometallic Ir/SiO 2 and ReO x/SiO 2, which is explained by the interaction between trioxo Re species and the IrO 2 phase. The metal structure of Ir-ReO x/SiO 2 constructed after reduction at 485-595 K is the cuboctahedron Ir metal particles covered with three-dimensional ReO x clusters.
Original language | English |
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Pages (from-to) | 23503-23514 |
Number of pages | 12 |
Journal | Journal of Physical Chemistry C |
Volume | 116 |
Issue number | 44 |
DOIs | |
Publication status | Published - 2012 Nov 8 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films