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 |
|---|---|
| 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
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Cite this
Amada, Y., Watanabe, H., Tamura, M., Nakagawa, Y., Okumura, K., & Tomishige, K. (2012). Structure of ReO x clusters attached on the Ir metal surface in Ir-ReO x/SiO 2 for the hydrogenolysis reaction. Journal of Physical Chemistry C, 116(44), 23503-23514. https://doi.org/10.1021/jp308527f