Structure of ReO x clusters attached on the Ir metal surface in Ir-ReO x/SiO 2 for the hydrogenolysis reaction

Yasushi Amada; Hideo Watanabe; Masazumi Tamura; Yoshinao Nakagawa; Kazu Okumura; Keiichi Tomishige

doi:10.1021/jp308527f

Structure of ReO _x clusters attached on the Ir metal surface in Ir-ReO _x/SiO ₂ for the hydrogenolysis reaction

Yasushi Amada, Hideo Watanabe, Masazumi Tamura, Yoshinao Nakagawa, Kazu Okumura, Keiichi Tomishige

ENG - Applied Chemistry

Research output: Contribution to journal › Article › peer-review

107 Citations (Scopus)

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	https://doi.org/10.1021/jp308527f
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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Structure of ReO _x clusters attached on the Ir metal surface in Ir-ReO _x/SiO ₂ for the hydrogenolysis reaction. / Amada, Yasushi; Watanabe, Hideo; Tamura, Masazumi; Nakagawa, Yoshinao; Okumura, Kazu; Tomishige, Keiichi.

In: Journal of Physical Chemistry C, Vol. 116, No. 44, 08.11.2012, p. 23503-23514.

Research output: Contribution to journal › Article › peer-review

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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.",

author = "Yasushi Amada and Hideo Watanabe and Masazumi Tamura and Yoshinao Nakagawa and Kazu Okumura and Keiichi Tomishige",

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AU - Amada, Yasushi

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AU - Nakagawa, Yoshinao

AU - Okumura, Kazu

AU - Tomishige, Keiichi

PY - 2012/11/8

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N2 - 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.

AB - 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.

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Structure of ReO _x clusters attached on the Ir metal surface in Ir-ReO _x/SiO ₂ for the hydrogenolysis reaction

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