Effects of metal cation doping in CeO2 support on catalytic methane steam reforming at low temperature in an electric field

Ayako Takahashi; Reona Inagaki; Maki Torimoto; Yudai Hisai; Taku Matsuda; Quanbao Ma; Jeong Gil Seo; Takuma Higo; Hideaki Tsuneki; Shuhei Ogo; Truls Norby; Yasushi Sekine

doi:10.1039/d0ra01721c

Effects of metal cation doping in CeO₂ support on catalytic methane steam reforming at low temperature in an electric field

Ayako Takahashi, Reona Inagaki, Maki Torimoto, Yudai Hisai, Taku Matsuda, Quanbao Ma, Jeong Gil Seo, Takuma Higo, Hideaki Tsuneki, Shuhei Ogo, Truls Norby, Yasushi Sekine

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Abstract

Catalytic methane steam reforming was conducted at low temperature using a Pd catalyst supported on Ce_1-xM_xO₂ (x = 0 or 0.1, M = Ca, Ba, La, Y or Al) oxides with or without an electric field (EF). The effects of the catalyst support on catalytic activity and surface proton hopping were investigated. Results show that Pd/Al-CeO₂ (Pd/Ce_0.9Al_0.1O₂) showed higher activity than Pd/CeO₂ with EF, although their activity was identical without EF. Thermogravimetry revealed a larger amount of H₂O adsorbed onto Pd/Al-CeO₂ than onto Pd/CeO₂, so Al doping to CeO₂ contributes to greater H₂O adsorption. Furthermore, electrochemical conduction measurements of Pd/Al-CeO₂ revealed a larger contribution of surface proton hopping than that for Pd/CeO₂. This promotes the surface proton conductivity and catalytic activity during EF application.

Original language	English
Pages (from-to)	14487-14492
Number of pages	6
Journal	RSC Advances
Volume	10
Issue number	25
DOIs	https://doi.org/10.1039/d0ra01721c
Publication status	Published - 2020 Apr 8

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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title = "Effects of metal cation doping in CeO2 support on catalytic methane steam reforming at low temperature in an electric field",

abstract = "Catalytic methane steam reforming was conducted at low temperature using a Pd catalyst supported on Ce1-xMxO2 (x = 0 or 0.1, M = Ca, Ba, La, Y or Al) oxides with or without an electric field (EF). The effects of the catalyst support on catalytic activity and surface proton hopping were investigated. Results show that Pd/Al-CeO2 (Pd/Ce0.9Al0.1O2) showed higher activity than Pd/CeO2 with EF, although their activity was identical without EF. Thermogravimetry revealed a larger amount of H2O adsorbed onto Pd/Al-CeO2 than onto Pd/CeO2, so Al doping to CeO2 contributes to greater H2O adsorption. Furthermore, electrochemical conduction measurements of Pd/Al-CeO2 revealed a larger contribution of surface proton hopping than that for Pd/CeO2. This promotes the surface proton conductivity and catalytic activity during EF application.",

author = "Ayako Takahashi and Reona Inagaki and Maki Torimoto and Yudai Hisai and Taku Matsuda and Quanbao Ma and Seo, {Jeong Gil} and Takuma Higo and Hideaki Tsuneki and Shuhei Ogo and Truls Norby and Yasushi Sekine",

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AU - Takahashi, Ayako

AU - Inagaki, Reona

AU - Torimoto, Maki

AU - Hisai, Yudai

AU - Matsuda, Taku

AU - Ma, Quanbao

AU - Seo, Jeong Gil

AU - Higo, Takuma

AU - Tsuneki, Hideaki

AU - Ogo, Shuhei

AU - Norby, Truls

AU - Sekine, Yasushi

PY - 2020/4/8

Y1 - 2020/4/8

N2 - Catalytic methane steam reforming was conducted at low temperature using a Pd catalyst supported on Ce1-xMxO2 (x = 0 or 0.1, M = Ca, Ba, La, Y or Al) oxides with or without an electric field (EF). The effects of the catalyst support on catalytic activity and surface proton hopping were investigated. Results show that Pd/Al-CeO2 (Pd/Ce0.9Al0.1O2) showed higher activity than Pd/CeO2 with EF, although their activity was identical without EF. Thermogravimetry revealed a larger amount of H2O adsorbed onto Pd/Al-CeO2 than onto Pd/CeO2, so Al doping to CeO2 contributes to greater H2O adsorption. Furthermore, electrochemical conduction measurements of Pd/Al-CeO2 revealed a larger contribution of surface proton hopping than that for Pd/CeO2. This promotes the surface proton conductivity and catalytic activity during EF application.

AB - Catalytic methane steam reforming was conducted at low temperature using a Pd catalyst supported on Ce1-xMxO2 (x = 0 or 0.1, M = Ca, Ba, La, Y or Al) oxides with or without an electric field (EF). The effects of the catalyst support on catalytic activity and surface proton hopping were investigated. Results show that Pd/Al-CeO2 (Pd/Ce0.9Al0.1O2) showed higher activity than Pd/CeO2 with EF, although their activity was identical without EF. Thermogravimetry revealed a larger amount of H2O adsorbed onto Pd/Al-CeO2 than onto Pd/CeO2, so Al doping to CeO2 contributes to greater H2O adsorption. Furthermore, electrochemical conduction measurements of Pd/Al-CeO2 revealed a larger contribution of surface proton hopping than that for Pd/CeO2. This promotes the surface proton conductivity and catalytic activity during EF application.

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Effects of metal cation doping in CeO₂ support on catalytic methane steam reforming at low temperature in an electric field

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