Support effect for nanosized Au catalysts in hydrogen production from formic acid decomposition

Monika Zacharska; Andrey L. Chuvilin; Vladimir V. Kriventsov; Sergey Beloshapkin; Miguel Estrada; Andrey Simakov; Dmitri A. Bulushev

doi:10.1039/c6cy00552g

Support effect for nanosized Au catalysts in hydrogen production from formic acid decomposition

Monika Zacharska, Andrey L. Chuvilin, Vladimir V. Kriventsov, Sergey Beloshapkin, Miguel Estrada, Andrey Simakov, Dmitri A. Bulushev

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

Abstract

Catalysts with about 2.5 wt% of gold supported on Al₂O₃, ZrO₂, CeO₂, La₂O₃ and MgO oxides and with the same mean metal particle sizes of 2.4-3.0 nm have been studied in hydrogen production via formic acid decomposition. A strong volcano-type relation of the catalytic activity on the electronegativity of the support's cation was demonstrated with the Au/Al₂O₃ catalyst on the top. This indicated that the activity is affected by the acid-base properties of the support. A study of the most active Au/Al₂O₃ catalyst with aberration-corrected HAADF/STEM, XPS and EXAFS proved that gold is in metallic state. The content of single supported gold atoms/cations was negligible. Therefore, the mechanism of the reaction was related to the activation of formic acid on the catalyst's support followed by further decomposition of the formed reaction intermediate on the Au/support interface.

Original language	English
Pages (from-to)	6853-6860
Number of pages	8
Journal	Catalysis Science and Technology
Volume	6
Issue number	18
DOIs	https://doi.org/10.1039/c6cy00552g
Publication status	Published - 2016

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title = "Support effect for nanosized Au catalysts in hydrogen production from formic acid decomposition",

abstract = "Catalysts with about 2.5 wt% of gold supported on Al2O3, ZrO2, CeO2, La2O3 and MgO oxides and with the same mean metal particle sizes of 2.4-3.0 nm have been studied in hydrogen production via formic acid decomposition. A strong volcano-type relation of the catalytic activity on the electronegativity of the support's cation was demonstrated with the Au/Al2O3 catalyst on the top. This indicated that the activity is affected by the acid-base properties of the support. A study of the most active Au/Al2O3 catalyst with aberration-corrected HAADF/STEM, XPS and EXAFS proved that gold is in metallic state. The content of single supported gold atoms/cations was negligible. Therefore, the mechanism of the reaction was related to the activation of formic acid on the catalyst's support followed by further decomposition of the formed reaction intermediate on the Au/support interface.",

author = "Monika Zacharska and Chuvilin, {Andrey L.} and Kriventsov, {Vladimir V.} and Sergey Beloshapkin and Miguel Estrada and Andrey Simakov and Bulushev, {Dmitri A.}",

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year = "2016",

doi = "10.1039/c6cy00552g",

language = "English",

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T1 - Support effect for nanosized Au catalysts in hydrogen production from formic acid decomposition

AU - Zacharska, Monika

AU - Chuvilin, Andrey L.

AU - Kriventsov, Vladimir V.

AU - Beloshapkin, Sergey

AU - Estrada, Miguel

AU - Simakov, Andrey

AU - Bulushev, Dmitri A.

N1 - Publisher Copyright: © The Royal Society of Chemistry 2016.

PY - 2016

Y1 - 2016

N2 - Catalysts with about 2.5 wt% of gold supported on Al2O3, ZrO2, CeO2, La2O3 and MgO oxides and with the same mean metal particle sizes of 2.4-3.0 nm have been studied in hydrogen production via formic acid decomposition. A strong volcano-type relation of the catalytic activity on the electronegativity of the support's cation was demonstrated with the Au/Al2O3 catalyst on the top. This indicated that the activity is affected by the acid-base properties of the support. A study of the most active Au/Al2O3 catalyst with aberration-corrected HAADF/STEM, XPS and EXAFS proved that gold is in metallic state. The content of single supported gold atoms/cations was negligible. Therefore, the mechanism of the reaction was related to the activation of formic acid on the catalyst's support followed by further decomposition of the formed reaction intermediate on the Au/support interface.

AB - Catalysts with about 2.5 wt% of gold supported on Al2O3, ZrO2, CeO2, La2O3 and MgO oxides and with the same mean metal particle sizes of 2.4-3.0 nm have been studied in hydrogen production via formic acid decomposition. A strong volcano-type relation of the catalytic activity on the electronegativity of the support's cation was demonstrated with the Au/Al2O3 catalyst on the top. This indicated that the activity is affected by the acid-base properties of the support. A study of the most active Au/Al2O3 catalyst with aberration-corrected HAADF/STEM, XPS and EXAFS proved that gold is in metallic state. The content of single supported gold atoms/cations was negligible. Therefore, the mechanism of the reaction was related to the activation of formic acid on the catalyst's support followed by further decomposition of the formed reaction intermediate on the Au/support interface.

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DO - 10.1039/c6cy00552g

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SP - 6853

EP - 6860

JO - Catalysis Science and Technology

JF - Catalysis Science and Technology

IS - 18

ER -

Support effect for nanosized Au catalysts in hydrogen production from formic acid decomposition

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