Superior activity of Rh1/ZnO single-atom catalyst for CO oxidation

Bing Han; Rui Lang; Hailian Tang; Jia Xu; Xiang Kui Gu; Botao Qiao; Jingyue(Jimmy) Liu

doi:10.1016/S1872-2067(19)63411-X

Superior activity of Rh₁/ZnO single-atom catalyst for CO oxidation

Bing Han, Rui Lang, Hailian Tang, Jia Xu, Xiang Kui Gu, Botao Qiao, Jingyue(Jimmy) Liu

Physics

Research output: Contribution to journal › Comment/debate › peer-review

47 Scopus citations

Abstract

CO oxidation is of great importance in both fundamental study and industrial application. Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost. Single-atom catalysts (SACs) can maximize the metal atom efficiency. Herein, ZnO nanowire (ZnO-nw) supported Rh, Au, and Pt SACs were successfully developed to investigate their CO oxidation performance. Interestingly, it was found that Rh₁/ZnO-nw showed much higher activity than the other noble metals which are usually regarded as good candidates for CO oxidation. In addition, the Rh SAC possessed high stability in high-temperature CO oxidation under simulated conditions in the presence of water and hydrocarbons. The high activity and stability make Rh₁/ZnO-nw promising for practical applications, especially in the automotive exhaust emission control. Theoretical calculations indicate that the CO oxidation proceeds via the Mars-van Krevelen mechanism and the lowest barrier for the rate-limiting O₂ dissociation at a surface oxygen vacancy site is a key factor in determining the observed highest activity of Rh₁/ZnO-nw amongst the studied SACs.

Original language	English (US)
Pages (from-to)	1847-1853
Number of pages	7
Journal	Chinese Journal of Catalysis
Volume	40
Issue number	12
DOIs	https://doi.org/10.1016/S1872-2067(19)63411-X
State	Published - Dec 2019

Keywords

Carbon monoxide oxidation
Density functional theory calculations
Rhodium
Single-atom catalysis
Zinc oxide nanowire

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Access to Document

10.1016/S1872-2067(19)63411-X

Cite this

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title = "Superior activity of Rh1/ZnO single-atom catalyst for CO oxidation",

abstract = "CO oxidation is of great importance in both fundamental study and industrial application. Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost. Single-atom catalysts (SACs) can maximize the metal atom efficiency. Herein, ZnO nanowire (ZnO-nw) supported Rh, Au, and Pt SACs were successfully developed to investigate their CO oxidation performance. Interestingly, it was found that Rh1/ZnO-nw showed much higher activity than the other noble metals which are usually regarded as good candidates for CO oxidation. In addition, the Rh SAC possessed high stability in high-temperature CO oxidation under simulated conditions in the presence of water and hydrocarbons. The high activity and stability make Rh1/ZnO-nw promising for practical applications, especially in the automotive exhaust emission control. Theoretical calculations indicate that the CO oxidation proceeds via the Mars-van Krevelen mechanism and the lowest barrier for the rate-limiting O2 dissociation at a surface oxygen vacancy site is a key factor in determining the observed highest activity of Rh1/ZnO-nw amongst the studied SACs.",

keywords = "Carbon monoxide oxidation, Density functional theory calculations, Rhodium, Single-atom catalysis, Zinc oxide nanowire",

author = "Bing Han and Rui Lang and Hailian Tang and Jia Xu and Gu, {Xiang Kui} and Botao Qiao and Jingyue(Jimmy) Liu",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China (21606222, 21776270) and Liaoning Revitalization Talents Program (XLYC1807068). J. Xu and J. Liu were supported by the US National Science Foundation under CHE-1465057. B. Qiao thanks the support of DNL Cooperation Fund, CAS (180403). Publisher Copyright: {\textcopyright} 2019 Dalian Institute of Chemical Physics, Chinese Academy of Sciences",

year = "2019",

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doi = "10.1016/S1872-2067(19)63411-X",

language = "English (US)",

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TY - JOUR

T1 - Superior activity of Rh1/ZnO single-atom catalyst for CO oxidation

AU - Han, Bing

AU - Lang, Rui

AU - Tang, Hailian

AU - Xu, Jia

AU - Gu, Xiang Kui

AU - Qiao, Botao

AU - Liu, Jingyue(Jimmy)

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (21606222, 21776270) and Liaoning Revitalization Talents Program (XLYC1807068). J. Xu and J. Liu were supported by the US National Science Foundation under CHE-1465057. B. Qiao thanks the support of DNL Cooperation Fund, CAS (180403). Publisher Copyright: © 2019 Dalian Institute of Chemical Physics, Chinese Academy of Sciences

PY - 2019/12

Y1 - 2019/12

N2 - CO oxidation is of great importance in both fundamental study and industrial application. Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost. Single-atom catalysts (SACs) can maximize the metal atom efficiency. Herein, ZnO nanowire (ZnO-nw) supported Rh, Au, and Pt SACs were successfully developed to investigate their CO oxidation performance. Interestingly, it was found that Rh1/ZnO-nw showed much higher activity than the other noble metals which are usually regarded as good candidates for CO oxidation. In addition, the Rh SAC possessed high stability in high-temperature CO oxidation under simulated conditions in the presence of water and hydrocarbons. The high activity and stability make Rh1/ZnO-nw promising for practical applications, especially in the automotive exhaust emission control. Theoretical calculations indicate that the CO oxidation proceeds via the Mars-van Krevelen mechanism and the lowest barrier for the rate-limiting O2 dissociation at a surface oxygen vacancy site is a key factor in determining the observed highest activity of Rh1/ZnO-nw amongst the studied SACs.

AB - CO oxidation is of great importance in both fundamental study and industrial application. Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost. Single-atom catalysts (SACs) can maximize the metal atom efficiency. Herein, ZnO nanowire (ZnO-nw) supported Rh, Au, and Pt SACs were successfully developed to investigate their CO oxidation performance. Interestingly, it was found that Rh1/ZnO-nw showed much higher activity than the other noble metals which are usually regarded as good candidates for CO oxidation. In addition, the Rh SAC possessed high stability in high-temperature CO oxidation under simulated conditions in the presence of water and hydrocarbons. The high activity and stability make Rh1/ZnO-nw promising for practical applications, especially in the automotive exhaust emission control. Theoretical calculations indicate that the CO oxidation proceeds via the Mars-van Krevelen mechanism and the lowest barrier for the rate-limiting O2 dissociation at a surface oxygen vacancy site is a key factor in determining the observed highest activity of Rh1/ZnO-nw amongst the studied SACs.

KW - Carbon monoxide oxidation

KW - Density functional theory calculations

KW - Rhodium

KW - Single-atom catalysis

KW - Zinc oxide nanowire

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