Temperature dependence of hydrogen adsorption properties of nickel-doped mesoporous silica

Yoshifumi Yamamoto; Nozomi Nawa; Shunsuke Nishimoto; Yoshikazu Kameshima; Motohide Matsuda; Michihiro Miyake

doi:10.1016/j.ijhydene.2011.02.010

Temperature dependence of hydrogen adsorption properties of nickel-doped mesoporous silica

Yoshifumi Yamamoto, Nozomi Nawa, Shunsuke Nishimoto, Yoshikazu Kameshima, Motohide Matsuda, Michihiro Miyake

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

10 Citations (Scopus)

Abstract

The temperature dependence of the hydrogen adsorption properties of nickel-doped mesoporous silica (MCM-41) synthesized by a direct hydrothermal method was investigated by measuring the amount of hydrogen adsorbed at pressures up to 100 kPa at 298, 373, and 473 K. Nickel-doped MCM-41 adsorbed more hydrogen than undoped MCM-41 and metallic nickel at ≈298/0, 373/0, and 473 K/0 kPa due to chemical adsorption enhanced by the highly dispersed nickel particles. Chemical adsorption increased with increasing nickel content and adsorption temperature, suggesting the presence of adsorption sites. The nickel doping also brought the spillover effect, which enhances the physical adsorption of hydrogen. The spillover effect was enhanced at high nickel contents and adsorption temperatures.

Original language	English
Pages (from-to)	5739-5743
Number of pages	5
Journal	International Journal of Hydrogen Energy
Volume	36
Issue number	9
DOIs	https://doi.org/10.1016/j.ijhydene.2011.02.010
Publication status	Published - May 1 2011

Keywords

Hydrogen adsorption
MCM-41
Nickel
Spillover effect
Temperature dependence

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

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title = "Temperature dependence of hydrogen adsorption properties of nickel-doped mesoporous silica",

abstract = "The temperature dependence of the hydrogen adsorption properties of nickel-doped mesoporous silica (MCM-41) synthesized by a direct hydrothermal method was investigated by measuring the amount of hydrogen adsorbed at pressures up to 100 kPa at 298, 373, and 473 K. Nickel-doped MCM-41 adsorbed more hydrogen than undoped MCM-41 and metallic nickel at ≈298/0, 373/0, and 473 K/0 kPa due to chemical adsorption enhanced by the highly dispersed nickel particles. Chemical adsorption increased with increasing nickel content and adsorption temperature, suggesting the presence of adsorption sites. The nickel doping also brought the spillover effect, which enhances the physical adsorption of hydrogen. The spillover effect was enhanced at high nickel contents and adsorption temperatures.",

keywords = "Hydrogen adsorption, MCM-41, Nickel, Spillover effect, Temperature dependence",

author = "Yoshifumi Yamamoto and Nozomi Nawa and Shunsuke Nishimoto and Yoshikazu Kameshima and Motohide Matsuda and Michihiro Miyake",

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T1 - Temperature dependence of hydrogen adsorption properties of nickel-doped mesoporous silica

AU - Yamamoto, Yoshifumi

AU - Nawa, Nozomi

AU - Nishimoto, Shunsuke

AU - Kameshima, Yoshikazu

AU - Matsuda, Motohide

AU - Miyake, Michihiro

PY - 2011/5/1

Y1 - 2011/5/1

N2 - The temperature dependence of the hydrogen adsorption properties of nickel-doped mesoporous silica (MCM-41) synthesized by a direct hydrothermal method was investigated by measuring the amount of hydrogen adsorbed at pressures up to 100 kPa at 298, 373, and 473 K. Nickel-doped MCM-41 adsorbed more hydrogen than undoped MCM-41 and metallic nickel at ≈298/0, 373/0, and 473 K/0 kPa due to chemical adsorption enhanced by the highly dispersed nickel particles. Chemical adsorption increased with increasing nickel content and adsorption temperature, suggesting the presence of adsorption sites. The nickel doping also brought the spillover effect, which enhances the physical adsorption of hydrogen. The spillover effect was enhanced at high nickel contents and adsorption temperatures.

AB - The temperature dependence of the hydrogen adsorption properties of nickel-doped mesoporous silica (MCM-41) synthesized by a direct hydrothermal method was investigated by measuring the amount of hydrogen adsorbed at pressures up to 100 kPa at 298, 373, and 473 K. Nickel-doped MCM-41 adsorbed more hydrogen than undoped MCM-41 and metallic nickel at ≈298/0, 373/0, and 473 K/0 kPa due to chemical adsorption enhanced by the highly dispersed nickel particles. Chemical adsorption increased with increasing nickel content and adsorption temperature, suggesting the presence of adsorption sites. The nickel doping also brought the spillover effect, which enhances the physical adsorption of hydrogen. The spillover effect was enhanced at high nickel contents and adsorption temperatures.

KW - Hydrogen adsorption

KW - MCM-41

KW - Nickel

KW - Spillover effect

KW - Temperature dependence

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