Methanol oxidative decomposition over zirconia supported silver catalyst and its reaction mechanism

Naohiro Shimoda, Shota Umehara, Masaki Kasahara, Teruhisa Hongo, Atsushi Yamazaki, Shigeo Satokawa

    研究成果: Article

    17 引用 (Scopus)

    抄録

    To develop a new catalyst for catalytic decomposition of volatile organic compounds (VOCs), the activity of various oxide supported silver (Ag) based catalysts for methanol (MeOH) oxidation reaction have been evaluated. Based on the activity evaluation, zirconia (ZrO2) is considered to be a substitute to ceria (CeO2) as a support material. The ZrO2 supported catalyst loading Ag component can oxidize MeOH to CO2 completely, while the main product is CO for MeOH oxidation over pure ZrO2. In the present work, 2.0 wt.% Ag/ZrO2 exhibits excellent activity comparable to Ag/CeO2. Furthermore, according to in situ FT-IR analysis over Ag/ZrO2 and pure ZrO2, it is considered that the methoxy, formate, and bicarbonate species adsorbed on the ZrO2 surface are intermediate species. We thus deduce that Ag component significantly enhances the oxidation step of methoxy species to CO2 via formate species, leading to the complete oxidation of MeOH to CO2 over Ag/ZrO2 catalyst.

    元の言語English
    記事番号15549
    ページ(範囲)56-64
    ページ数9
    ジャーナルApplied Catalysis A: General
    507
    DOI
    出版物ステータスPublished - 2015 10 25

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    formic acid
    Silver
    Zirconia
    Methanol
    Decomposition
    Oxidation
    Catalysts
    Catalyst supports
    Volatile Organic Compounds
    Cerium compounds
    Carbon Monoxide
    Bicarbonates
    Volatile organic compounds
    Oxides
    zirconium oxide

    ASJC Scopus subject areas

    • Catalysis
    • Process Chemistry and Technology

    これを引用

    Methanol oxidative decomposition over zirconia supported silver catalyst and its reaction mechanism. / Shimoda, Naohiro; Umehara, Shota; Kasahara, Masaki; Hongo, Teruhisa; Yamazaki, Atsushi; Satokawa, Shigeo.

    :: Applied Catalysis A: General, 巻 507, 15549, 25.10.2015, p. 56-64.

    研究成果: Article

    Shimoda, Naohiro ; Umehara, Shota ; Kasahara, Masaki ; Hongo, Teruhisa ; Yamazaki, Atsushi ; Satokawa, Shigeo. / Methanol oxidative decomposition over zirconia supported silver catalyst and its reaction mechanism. :: Applied Catalysis A: General. 2015 ; 巻 507. pp. 56-64.
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    abstract = "To develop a new catalyst for catalytic decomposition of volatile organic compounds (VOCs), the activity of various oxide supported silver (Ag) based catalysts for methanol (MeOH) oxidation reaction have been evaluated. Based on the activity evaluation, zirconia (ZrO2) is considered to be a substitute to ceria (CeO2) as a support material. The ZrO2 supported catalyst loading Ag component can oxidize MeOH to CO2 completely, while the main product is CO for MeOH oxidation over pure ZrO2. In the present work, 2.0 wt.{\%} Ag/ZrO2 exhibits excellent activity comparable to Ag/CeO2. Furthermore, according to in situ FT-IR analysis over Ag/ZrO2 and pure ZrO2, it is considered that the methoxy, formate, and bicarbonate species adsorbed on the ZrO2 surface are intermediate species. We thus deduce that Ag component significantly enhances the oxidation step of methoxy species to CO2 via formate species, leading to the complete oxidation of MeOH to CO2 over Ag/ZrO2 catalyst.",
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    T1 - Methanol oxidative decomposition over zirconia supported silver catalyst and its reaction mechanism

    AU - Shimoda, Naohiro

    AU - Umehara, Shota

    AU - Kasahara, Masaki

    AU - Hongo, Teruhisa

    AU - Yamazaki, Atsushi

    AU - Satokawa, Shigeo

    PY - 2015/10/25

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    N2 - To develop a new catalyst for catalytic decomposition of volatile organic compounds (VOCs), the activity of various oxide supported silver (Ag) based catalysts for methanol (MeOH) oxidation reaction have been evaluated. Based on the activity evaluation, zirconia (ZrO2) is considered to be a substitute to ceria (CeO2) as a support material. The ZrO2 supported catalyst loading Ag component can oxidize MeOH to CO2 completely, while the main product is CO for MeOH oxidation over pure ZrO2. In the present work, 2.0 wt.% Ag/ZrO2 exhibits excellent activity comparable to Ag/CeO2. Furthermore, according to in situ FT-IR analysis over Ag/ZrO2 and pure ZrO2, it is considered that the methoxy, formate, and bicarbonate species adsorbed on the ZrO2 surface are intermediate species. We thus deduce that Ag component significantly enhances the oxidation step of methoxy species to CO2 via formate species, leading to the complete oxidation of MeOH to CO2 over Ag/ZrO2 catalyst.

    AB - To develop a new catalyst for catalytic decomposition of volatile organic compounds (VOCs), the activity of various oxide supported silver (Ag) based catalysts for methanol (MeOH) oxidation reaction have been evaluated. Based on the activity evaluation, zirconia (ZrO2) is considered to be a substitute to ceria (CeO2) as a support material. The ZrO2 supported catalyst loading Ag component can oxidize MeOH to CO2 completely, while the main product is CO for MeOH oxidation over pure ZrO2. In the present work, 2.0 wt.% Ag/ZrO2 exhibits excellent activity comparable to Ag/CeO2. Furthermore, according to in situ FT-IR analysis over Ag/ZrO2 and pure ZrO2, it is considered that the methoxy, formate, and bicarbonate species adsorbed on the ZrO2 surface are intermediate species. We thus deduce that Ag component significantly enhances the oxidation step of methoxy species to CO2 via formate species, leading to the complete oxidation of MeOH to CO2 over Ag/ZrO2 catalyst.

    KW - Ag catalyst

    KW - FTIR

    KW - Methanol oxidation

    KW - VOCs

    KW - Zirconia

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