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Activity Hierarchy

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Christopher J. Kiely – One of the best experts on this subject based on the ideXlab platform.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeOx materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission elecelectron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeOx catalyst.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature Communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low-temperature carbon monoxide oxidation remains an open question. Here, the authors look at the catalytic behaviours of supported catalysts prepared under different conditions and correlate the populations of various species with Activity. The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeO_x materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission elecelectron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeO_ x catalyst.

Simon J. Freakley – One of the best experts on this subject based on the ideXlab platform.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeOx materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeOx catalyst.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature Communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low-temperature carbon monoxide oxidation remains an open question. Here, the authors look at the catalytic behaviours of supported catalysts prepared under different conditions and correlate the populations of various species with Activity. The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeO_x materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeO_ x catalyst.

Graham J. Hutchings – One of the best experts on this subject based on the ideXlab platform.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeOx materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeOx catalyst.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature Communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low-temperature carbon monoxide oxidation remains an open question. Here, the authors look at the catalytic behaviours of supported catalysts prepared under different conditions and correlate the populations of various species with Activity. The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeO_x materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeO_ x catalyst.

Masatake Haruta – One of the best experts on this subject based on the ideXlab platform.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeOx materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeOx catalyst.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature Communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low-temperature carbon monoxide oxidation remains an open question. Here, the authors look at the catalytic behaviours of supported catalysts prepared under different conditions and correlate the populations of various species with Activity. The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeO_x materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeO_ x catalyst.

Yuki Mineo – One of the best experts on this subject based on the ideXlab platform.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeOx materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeOx catalyst.

  • Population and Hierarchy of active species in gold iron oxide catalysts for carbon monoxide oxidation
    Nature Communications, 2016
    Co-Authors: Simon J. Freakley, Jennifer K. Edwards, Albert Frederick Carley, Albina Y. Borisevich, Yuki Mineo, Masatake Haruta, Graham J. Hutchings, Christopher J. Kiely
    Abstract:

    The identity of active species in supported gold catalysts for low-temperature carbon monoxide oxidation remains an open question. Here, the authors look at the catalytic behaviours of supported catalysts prepared under different conditions and correlate the populations of various species with Activity. The identity of active species in supported gold catalysts for low temperature carbon monoxide oxidation remains an unsettled debate. With large amounts of experimental evidence supporting theories of either gold nanoparticles or sub-nm gold species being active, it was recently proposed that a size-dependent Activity Hierarchy should exist. Here we study the diverging catalytic behaviours after heat treatment of Au/FeO_x materials prepared via co-precipitation and deposition precipitation methods. After ruling out any support effects, the gold particle size distributions in different catalysts are quantitatively studied using aberration corrected scanning transmission electron microscopy (STEM). A counting protocol is developed to reveal the true particle size distribution from HAADF-STEM images, which reliably includes all the gold species present. Correlation of the populations of the various gold species present with catalysis results demonstrate that a size-dependent Activity Hierarchy must exist in the Au/FeO_ x catalyst.