Room-temperature CO oxidation over a highly ordered mesoporous RuO 2 catalyst

Jung Nam Park; Jeong Kuk Shon; Mingshi Jin; Soo Sung Kong; Kiyoung Moon; Gwi Ok Park; Jin Hyo Boo; Ji Man Kim

doi:10.1007/s11144-011-0284-5

Room-temperature CO oxidation over a highly ordered mesoporous RuO ₂ catalyst

Jung Nam Park
, Jeong Kuk Shon
, Mingshi Jin
, Soo Sung Kong
, Kiyoung Moon
, Gwi Ok Park
, Jin Hyo Boo
, Ji Man Kim

Department of Chemistry

Sungkyunkwan University

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

21 Scopus citations

Abstract

Highly ordered mesoporous ruthenium dioxide (meso-RuO₂) has been successfully synthesized by controlling the surface hydrophobicity of a mesoporous silica template (KIT-6) via a nano-replication method. The meso-RuO₂ material, thus obtained, exhibits a well-defined mesostructure and high surface area (131 m² ^g-1g-1). The physicochemical properties of the meso-RuO₂ material are characterized by electron microscopy, X-ray diffraction, N₂ adsorption-desorption, temperature programmed techniques, and X-ray photoelectron spectroscopy. Pretreatment of the meso-RuO₂ catalyst under different gas environments (O₂, H₂ and CO) strongly affects the catalytic activity towards CO oxidation. The meso-RuO₂, pretreated by O₂ flowing at 200° C, exhibited excellent catalytic activity for CO oxidation, 100% CO conversion with long-term stability at room temperature, whereas the meso-RuO₂ catalysts with pretreatment under other conditions are not very active at room temperature. It is found that the surface oxygen species generated on the meso-RuO₂ during O ₂ pretreatment at 200° C provide CO oxidation activity at room temperature.

Original language	English
Pages (from-to)	87-99
Number of pages	13
Journal	Reaction Kinetics, Mechanisms and Catalysis
Volume	103
Issue number	1
DOIs	https://doi.org/10.1007/s11144-011-0284-5
State	Published - Jun 2011

Keywords

CO oxidation
Mesoporous RuO
Nano-replication
Pretreatment
Surface oxygen species

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title = "Room-temperature CO oxidation over a highly ordered mesoporous RuO 2 catalyst",

abstract = "Highly ordered mesoporous ruthenium dioxide (meso-RuO2) has been successfully synthesized by controlling the surface hydrophobicity of a mesoporous silica template (KIT-6) via a nano-replication method. The meso-RuO2 material, thus obtained, exhibits a well-defined mesostructure and high surface area (131 m2 g-1g-1). The physicochemical properties of the meso-RuO2 material are characterized by electron microscopy, X-ray diffraction, N2 adsorption-desorption, temperature programmed techniques, and X-ray photoelectron spectroscopy. Pretreatment of the meso-RuO2 catalyst under different gas environments (O2, H2 and CO) strongly affects the catalytic activity towards CO oxidation. The meso-RuO2, pretreated by O2 flowing at 200° C, exhibited excellent catalytic activity for CO oxidation, 100\% CO conversion with long-term stability at room temperature, whereas the meso-RuO2 catalysts with pretreatment under other conditions are not very active at room temperature. It is found that the surface oxygen species generated on the meso-RuO2 during O 2 pretreatment at 200° C provide CO oxidation activity at room temperature.",

keywords = "CO oxidation, Mesoporous RuO, Nano-replication, Pretreatment, Surface oxygen species",

author = "Park, \{Jung Nam\} and \{Kuk Shon\}, Jeong and Mingshi Jin and \{Sung Kong\}, Soo and Kiyoung Moon and \{Ok Park\}, Gwi and Boo, \{Jin Hyo\} and \{Man Kim\}, Ji",

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AU - Park, Jung Nam

AU - Kuk Shon, Jeong

AU - Jin, Mingshi

AU - Sung Kong, Soo

AU - Moon, Kiyoung

AU - Ok Park, Gwi

AU - Boo, Jin Hyo

AU - Man Kim, Ji

PY - 2011/6

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N2 - Highly ordered mesoporous ruthenium dioxide (meso-RuO2) has been successfully synthesized by controlling the surface hydrophobicity of a mesoporous silica template (KIT-6) via a nano-replication method. The meso-RuO2 material, thus obtained, exhibits a well-defined mesostructure and high surface area (131 m2 g-1g-1). The physicochemical properties of the meso-RuO2 material are characterized by electron microscopy, X-ray diffraction, N2 adsorption-desorption, temperature programmed techniques, and X-ray photoelectron spectroscopy. Pretreatment of the meso-RuO2 catalyst under different gas environments (O2, H2 and CO) strongly affects the catalytic activity towards CO oxidation. The meso-RuO2, pretreated by O2 flowing at 200° C, exhibited excellent catalytic activity for CO oxidation, 100% CO conversion with long-term stability at room temperature, whereas the meso-RuO2 catalysts with pretreatment under other conditions are not very active at room temperature. It is found that the surface oxygen species generated on the meso-RuO2 during O 2 pretreatment at 200° C provide CO oxidation activity at room temperature.

AB - Highly ordered mesoporous ruthenium dioxide (meso-RuO2) has been successfully synthesized by controlling the surface hydrophobicity of a mesoporous silica template (KIT-6) via a nano-replication method. The meso-RuO2 material, thus obtained, exhibits a well-defined mesostructure and high surface area (131 m2 g-1g-1). The physicochemical properties of the meso-RuO2 material are characterized by electron microscopy, X-ray diffraction, N2 adsorption-desorption, temperature programmed techniques, and X-ray photoelectron spectroscopy. Pretreatment of the meso-RuO2 catalyst under different gas environments (O2, H2 and CO) strongly affects the catalytic activity towards CO oxidation. The meso-RuO2, pretreated by O2 flowing at 200° C, exhibited excellent catalytic activity for CO oxidation, 100% CO conversion with long-term stability at room temperature, whereas the meso-RuO2 catalysts with pretreatment under other conditions are not very active at room temperature. It is found that the surface oxygen species generated on the meso-RuO2 during O 2 pretreatment at 200° C provide CO oxidation activity at room temperature.

KW - CO oxidation

KW - Mesoporous RuO

KW - Nano-replication

KW - Pretreatment

KW - Surface oxygen species

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JO - Reaction Kinetics, Mechanisms and Catalysis

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ER -

Room-temperature CO oxidation over a highly ordered mesoporous RuO ₂ catalyst

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