In-situ Analysis of Alloy Effects in Low-temperature Methane Dry Reforming in an Electric Field

Ayaka Motomura; Maki Torimoto; Clarence Sampson; Takuma Higo; Yasushi Sekine

doi:10.1246/CL.230032

In-situ Analysis of Alloy Effects in Low-temperature Methane Dry Reforming in an Electric Field

Ayaka Motomura, Maki Torimoto, Clarence Sampson, Takuma Higo, Yasushi Sekine^*

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Methane dry reforming at 373 K in a DC electric field was carried out using Ni/CeO₂ and Ni_0.8Fe_0.2/CeO₂ alloy catalysts, and their alloying effects were investigated in detail using XAFS and in-situ surface spectroscopy. For the Ni catalyst, there was a decrease in the adsorption of carbonate species, an increase in the proportion of bidentate carbonate species, and an observed degradation in activity caused by carbon deposition over time. Conversely, the alteration of electronic state occurring as a result of the ligand effect (electronic interaction among atoms by alloying) on the Ni-Fe catalyst contributed to the stabilization of intermediates involved in rate-determining steps specific to electric-field catalysis. Carbon deposition was less likely to occur, resulting in significantly higher activity when compared to the Ni catalyst.

Original language	English
Pages (from-to)	259-262
Number of pages	4
Journal	Chemistry Letters
Volume	52
Issue number	4
DOIs	https://doi.org/10.1246/CL.230032
Publication status	Published - 2023 Apr

Keywords

Alloying effect
Dry reforming of methane
In-situ analysis

ASJC Scopus subject areas

General Chemistry

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10.1246/CL.230032

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@article{fe1e899eab24434aa58fd493301948a1,

title = "In-situ Analysis of Alloy Effects in Low-temperature Methane Dry Reforming in an Electric Field",

abstract = "Methane dry reforming at 373 K in a DC electric field was carried out using Ni/CeO2 and Ni0.8Fe0.2/CeO2 alloy catalysts, and their alloying effects were investigated in detail using XAFS and in-situ surface spectroscopy. For the Ni catalyst, there was a decrease in the adsorption of carbonate species, an increase in the proportion of bidentate carbonate species, and an observed degradation in activity caused by carbon deposition over time. Conversely, the alteration of electronic state occurring as a result of the ligand effect (electronic interaction among atoms by alloying) on the Ni-Fe catalyst contributed to the stabilization of intermediates involved in rate-determining steps specific to electric-field catalysis. Carbon deposition was less likely to occur, resulting in significantly higher activity when compared to the Ni catalyst.",

keywords = "Alloying effect, Dry reforming of methane, In-situ analysis",

author = "Ayaka Motomura and Maki Torimoto and Clarence Sampson and Takuma Higo and Yasushi Sekine",

note = "Funding Information: The authors thank Mr. Yuki Nakaya and Prof. Shinya Furukawa (Hokkaido University) for great assistance in the XAFS measurements, and Ms. Ayaka Shigemoto (Waseda University) for her great assistance in the Q-mass analysis. This work was partially supported by Demonstration Project of Innovative Catalyst Technology for Decarbonization through Regional Resource Recycling, the Ministry of the Environment, Government of Japan. Publisher Copyright: {\textcopyright} 2023 The Chemical Society of Japan.",

year = "2023",

month = apr,

doi = "10.1246/CL.230032",

language = "English",

volume = "52",

pages = "259--262",

journal = "Chemistry Letters",

issn = "0366-7022",

publisher = "Chemical Society of Japan",

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TY - JOUR

T1 - In-situ Analysis of Alloy Effects in Low-temperature Methane Dry Reforming in an Electric Field

AU - Motomura, Ayaka

AU - Torimoto, Maki

AU - Sampson, Clarence

AU - Higo, Takuma

AU - Sekine, Yasushi

N1 - Funding Information: The authors thank Mr. Yuki Nakaya and Prof. Shinya Furukawa (Hokkaido University) for great assistance in the XAFS measurements, and Ms. Ayaka Shigemoto (Waseda University) for her great assistance in the Q-mass analysis. This work was partially supported by Demonstration Project of Innovative Catalyst Technology for Decarbonization through Regional Resource Recycling, the Ministry of the Environment, Government of Japan. Publisher Copyright: © 2023 The Chemical Society of Japan.

PY - 2023/4

Y1 - 2023/4

N2 - Methane dry reforming at 373 K in a DC electric field was carried out using Ni/CeO2 and Ni0.8Fe0.2/CeO2 alloy catalysts, and their alloying effects were investigated in detail using XAFS and in-situ surface spectroscopy. For the Ni catalyst, there was a decrease in the adsorption of carbonate species, an increase in the proportion of bidentate carbonate species, and an observed degradation in activity caused by carbon deposition over time. Conversely, the alteration of electronic state occurring as a result of the ligand effect (electronic interaction among atoms by alloying) on the Ni-Fe catalyst contributed to the stabilization of intermediates involved in rate-determining steps specific to electric-field catalysis. Carbon deposition was less likely to occur, resulting in significantly higher activity when compared to the Ni catalyst.

AB - Methane dry reforming at 373 K in a DC electric field was carried out using Ni/CeO2 and Ni0.8Fe0.2/CeO2 alloy catalysts, and their alloying effects were investigated in detail using XAFS and in-situ surface spectroscopy. For the Ni catalyst, there was a decrease in the adsorption of carbonate species, an increase in the proportion of bidentate carbonate species, and an observed degradation in activity caused by carbon deposition over time. Conversely, the alteration of electronic state occurring as a result of the ligand effect (electronic interaction among atoms by alloying) on the Ni-Fe catalyst contributed to the stabilization of intermediates involved in rate-determining steps specific to electric-field catalysis. Carbon deposition was less likely to occur, resulting in significantly higher activity when compared to the Ni catalyst.

KW - Alloying effect

KW - Dry reforming of methane

KW - In-situ analysis

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DO - 10.1246/CL.230032

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SN - 0366-7022

VL - 52

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JO - Chemistry Letters

JF - Chemistry Letters

IS - 4

ER -

In-situ Analysis of Alloy Effects in Low-temperature Methane Dry Reforming in an Electric Field

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Keywords

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