Dehydrogenation of Methylcyclohexane over Pt/TiO2 Catalyst

Satoshi Nagatake; Takuma Higo; Shuhei Ogo; Yukihiro Sugiura; Ryo Watanabe; Choji Fukuhara; Yasushi Sekine

doi:10.1007/s10562-015-1623-3

Dehydrogenation of Methylcyclohexane over Pt/TiO₂ Catalyst

Satoshi Nagatake, Takuma Higo, Shuhei Ogo, Yukihiro Sugiura, Ryo Watanabe, Choji Fukuhara, Yasushi Sekine^*

^*Corresponding author for this work

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

32 Citations (Scopus)

Abstract

Methylcyclohexane (MCH) is expected as a hydrogen carrier. Dehydrogenation of MCH was conducted over supported Pt catalysts at 623 K. Pt/TiO₂ showed high stability for dehydrogenation and good resistance for coke formation. The partial pressure dependence of MCH, toluene, and H₂ was investigated for Pt/TiO₂ and Pt/Al₂O₃ catalysts, which showed different tendencies for toluene partial pressure. The reaction order of toluene partial pressure for Pt/TiO₂ was almost zero, but that for Pt/Al₂O₃ was a negative value. Toluene inhibited the Pt/Al₂O₃ catalytic activity, but that of Pt/TiO₂ was unaffected. The SMSI effect was confirmed on Pt/TiO₂ by CO chemisorption measurement. Pt on TiO₂ became an electron-rich state compared to Pt⁰ because of the electron donation from TiO_x, and the toluene adsorption to Pt on TiO₂ was weakened.

Original language	English
Pages (from-to)	54-60
Number of pages	7
Journal	Catalysis Letters
Volume	146
Issue number	1
DOIs	https://doi.org/10.1007/s10562-015-1623-3
Publication status	Published - 2016 Jan 1

Keywords

Dehydrogenation
Electronic state
Methylcyclohexane
Organic hydride
Pt/TiO

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Access to Document

10.1007/s10562-015-1623-3

Cite this

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title = "Dehydrogenation of Methylcyclohexane over Pt/TiO2 Catalyst",

abstract = "Methylcyclohexane (MCH) is expected as a hydrogen carrier. Dehydrogenation of MCH was conducted over supported Pt catalysts at 623 K. Pt/TiO2 showed high stability for dehydrogenation and good resistance for coke formation. The partial pressure dependence of MCH, toluene, and H2 was investigated for Pt/TiO2 and Pt/Al2O3 catalysts, which showed different tendencies for toluene partial pressure. The reaction order of toluene partial pressure for Pt/TiO2 was almost zero, but that for Pt/Al2O3 was a negative value. Toluene inhibited the Pt/Al2O3 catalytic activity, but that of Pt/TiO2 was unaffected. The SMSI effect was confirmed on Pt/TiO2 by CO chemisorption measurement. Pt on TiO2 became an electron-rich state compared to Pt0 because of the electron donation from TiOx, and the toluene adsorption to Pt on TiO2 was weakened.",

keywords = "Dehydrogenation, Electronic state, Methylcyclohexane, Organic hydride, Pt/TiO",

author = "Satoshi Nagatake and Takuma Higo and Shuhei Ogo and Yukihiro Sugiura and Ryo Watanabe and Choji Fukuhara and Yasushi Sekine",

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AU - Nagatake, Satoshi

AU - Higo, Takuma

AU - Ogo, Shuhei

AU - Sugiura, Yukihiro

AU - Watanabe, Ryo

AU - Fukuhara, Choji

AU - Sekine, Yasushi

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Methylcyclohexane (MCH) is expected as a hydrogen carrier. Dehydrogenation of MCH was conducted over supported Pt catalysts at 623 K. Pt/TiO2 showed high stability for dehydrogenation and good resistance for coke formation. The partial pressure dependence of MCH, toluene, and H2 was investigated for Pt/TiO2 and Pt/Al2O3 catalysts, which showed different tendencies for toluene partial pressure. The reaction order of toluene partial pressure for Pt/TiO2 was almost zero, but that for Pt/Al2O3 was a negative value. Toluene inhibited the Pt/Al2O3 catalytic activity, but that of Pt/TiO2 was unaffected. The SMSI effect was confirmed on Pt/TiO2 by CO chemisorption measurement. Pt on TiO2 became an electron-rich state compared to Pt0 because of the electron donation from TiOx, and the toluene adsorption to Pt on TiO2 was weakened.

AB - Methylcyclohexane (MCH) is expected as a hydrogen carrier. Dehydrogenation of MCH was conducted over supported Pt catalysts at 623 K. Pt/TiO2 showed high stability for dehydrogenation and good resistance for coke formation. The partial pressure dependence of MCH, toluene, and H2 was investigated for Pt/TiO2 and Pt/Al2O3 catalysts, which showed different tendencies for toluene partial pressure. The reaction order of toluene partial pressure for Pt/TiO2 was almost zero, but that for Pt/Al2O3 was a negative value. Toluene inhibited the Pt/Al2O3 catalytic activity, but that of Pt/TiO2 was unaffected. The SMSI effect was confirmed on Pt/TiO2 by CO chemisorption measurement. Pt on TiO2 became an electron-rich state compared to Pt0 because of the electron donation from TiOx, and the toluene adsorption to Pt on TiO2 was weakened.

KW - Dehydrogenation

KW - Electronic state

KW - Methylcyclohexane

KW - Organic hydride

KW - Pt/TiO

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