Highly selective photocatalytic reduction of carbon dioxide with water over silver-loaded calcium titanate

Akihiko Anzai; Naoto Fukuo; Akira Yamamoto; Hisao Yoshida

doi:10.1016/j.catcom.2017.06.046

Highly selective photocatalytic reduction of carbon dioxide with water over silver-loaded calcium titanate

Akihiko Anzai, Naoto Fukuo, Akira Yamamoto, Hisao Yoshida

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

64 Citations (Scopus)

Abstract

The once reported Ag-modified CaTiO₃ photocatalyst was reexamined by optimizing the Ag loading amount and using a conventional photochemical reactor. This revealed that the Ag-modified CaTiO₃ photocatalyst actually showed both high production rate of CO (54 μmol h⁻¹) and excellent selectivity towards CO formation (94%) by suppressing the H₂ production via water splitting. It is suggested that the high photocatalytic performance originates from not only the optimized amount of cocatalyst and the high irradiation light intensity but also the high concentration of dissolved CO₂ that was achieved by a bubbling flow of CO₂ at the lower reaction temperature. These reaction conditions provided ca. 40 times higher CO formation rate. It was proposed that the deposited small Ag nanoparticles are the selective active sites for CO formation and the CaTiO₃ crystal surface produces H₂ preferably.

Original language	English
Pages (from-to)	134-138
Number of pages	5
Journal	Catalysis Communications
Volume	100
DOIs	https://doi.org/10.1016/j.catcom.2017.06.046
Publication status	Published - 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
General Chemistry
Process Chemistry and Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.catcom.2017.06.046

Cite this

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title = "Highly selective photocatalytic reduction of carbon dioxide with water over silver-loaded calcium titanate",

abstract = "The once reported Ag-modified CaTiO3 photocatalyst was reexamined by optimizing the Ag loading amount and using a conventional photochemical reactor. This revealed that the Ag-modified CaTiO3 photocatalyst actually showed both high production rate of CO (54 μmol h−1) and excellent selectivity towards CO formation (94%) by suppressing the H2 production via water splitting. It is suggested that the high photocatalytic performance originates from not only the optimized amount of cocatalyst and the high irradiation light intensity but also the high concentration of dissolved CO2 that was achieved by a bubbling flow of CO2 at the lower reaction temperature. These reaction conditions provided ca. 40 times higher CO formation rate. It was proposed that the deposited small Ag nanoparticles are the selective active sites for CO formation and the CaTiO3 crystal surface produces H2 preferably.",

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T1 - Highly selective photocatalytic reduction of carbon dioxide with water over silver-loaded calcium titanate

AU - Anzai, Akihiko

AU - Fukuo, Naoto

AU - Yamamoto, Akira

AU - Yoshida, Hisao

PY - 2017

Y1 - 2017

N2 - The once reported Ag-modified CaTiO3 photocatalyst was reexamined by optimizing the Ag loading amount and using a conventional photochemical reactor. This revealed that the Ag-modified CaTiO3 photocatalyst actually showed both high production rate of CO (54 μmol h−1) and excellent selectivity towards CO formation (94%) by suppressing the H2 production via water splitting. It is suggested that the high photocatalytic performance originates from not only the optimized amount of cocatalyst and the high irradiation light intensity but also the high concentration of dissolved CO2 that was achieved by a bubbling flow of CO2 at the lower reaction temperature. These reaction conditions provided ca. 40 times higher CO formation rate. It was proposed that the deposited small Ag nanoparticles are the selective active sites for CO formation and the CaTiO3 crystal surface produces H2 preferably.

AB - The once reported Ag-modified CaTiO3 photocatalyst was reexamined by optimizing the Ag loading amount and using a conventional photochemical reactor. This revealed that the Ag-modified CaTiO3 photocatalyst actually showed both high production rate of CO (54 μmol h−1) and excellent selectivity towards CO formation (94%) by suppressing the H2 production via water splitting. It is suggested that the high photocatalytic performance originates from not only the optimized amount of cocatalyst and the high irradiation light intensity but also the high concentration of dissolved CO2 that was achieved by a bubbling flow of CO2 at the lower reaction temperature. These reaction conditions provided ca. 40 times higher CO formation rate. It was proposed that the deposited small Ag nanoparticles are the selective active sites for CO formation and the CaTiO3 crystal surface produces H2 preferably.

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JO - Catalysis Communications

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ER -

Highly selective photocatalytic reduction of carbon dioxide with water over silver-loaded calcium titanate

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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