CO oxidation by neutral gold-vanadium oxide clusters

Shu Hua Ou; Jiao Jiao Chen; Xiao Na Li; Li Na Wang; Tong Mei Ma; Sheng Gui He

doi:10.1063/1674-0068/cjcp1812300

CO oxidation by neutral gold-vanadium oxide clusters

Shu Hua Ou, Jiao Jiao Chen, Xiao Na Li^*, Li Na Wang, Tong Mei Ma, Sheng Gui He

^*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

Oxidation of CO by gas-phase atomic clusters is being actively studied to understand the molecular-level mechanisms of heterogeneous CO oxidation over related catalytic surfaces. However, it is experimentally challenging to study CO oxidation by neutral heteronuclear metal oxide clusters because of the difficulty of cluster ionization and detection without fragmentation. Herein, the neutral AuVO_2-4 clusters were experimentally generated and their reactions with CO and O₂ were studied. The experimental results showed that CO adsorption is the dominant channel on the interactions of AuVO₄ and AuVO₃ with CO, and AuVO₂ can pick up an O₂ molecule to generate AuVO₄. Theoretical studies indicated that the oxidation of the trapped CO in AuVO_3,4CO into CO₂ is exothermic while the reaction barriers have to be overcome at the elevated temperatures. A catalytic cycle for CO oxidation by AuVO_2-4 is proposed.

Original language	English
Pages (from-to)	207-212
Number of pages	6
Journal	Chinese Journal of Chemical Physics
Volume	32
Issue number	2
DOIs	https://doi.org/10.1063/1674-0068/cjcp1812300
Publication status	Published - 1 Apr 2019
Externally published	Yes

Keywords

CO oxidation
Gold
Mass spectrometry
Neutral clusters
Theoretical calculations

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10.1063/1674-0068/cjcp1812300

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title = "CO oxidation by neutral gold-vanadium oxide clusters",

abstract = "Oxidation of CO by gas-phase atomic clusters is being actively studied to understand the molecular-level mechanisms of heterogeneous CO oxidation over related catalytic surfaces. However, it is experimentally challenging to study CO oxidation by neutral heteronuclear metal oxide clusters because of the difficulty of cluster ionization and detection without fragmentation. Herein, the neutral AuVO2-4 clusters were experimentally generated and their reactions with CO and O2 were studied. The experimental results showed that CO adsorption is the dominant channel on the interactions of AuVO4 and AuVO3 with CO, and AuVO2 can pick up an O2 molecule to generate AuVO4. Theoretical studies indicated that the oxidation of the trapped CO in AuVO3,4CO into CO2 is exothermic while the reaction barriers have to be overcome at the elevated temperatures. A catalytic cycle for CO oxidation by AuVO2-4 is proposed.",

keywords = "CO oxidation, Gold, Mass spectrometry, Neutral clusters, Theoretical calculations",

author = "Ou, \{Shu Hua\} and Chen, \{Jiao Jiao\} and Li, \{Xiao Na\} and Wang, \{Li Na\} and Ma, \{Tong Mei\} and He, \{Sheng Gui\}",

note = "Publisher Copyright: {\textcopyright} 2019 Chinese Physical Society.",

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doi = "10.1063/1674-0068/cjcp1812300",

language = "English",

volume = "32",

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journal = "Chinese Journal of Chemical Physics",

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publisher = "American Institute of Physics",

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TY - JOUR

T1 - CO oxidation by neutral gold-vanadium oxide clusters

AU - Ou, Shu Hua

AU - Chen, Jiao Jiao

AU - Li, Xiao Na

AU - Wang, Li Na

AU - Ma, Tong Mei

AU - He, Sheng Gui

PY - 2019/4/1

Y1 - 2019/4/1

N2 - Oxidation of CO by gas-phase atomic clusters is being actively studied to understand the molecular-level mechanisms of heterogeneous CO oxidation over related catalytic surfaces. However, it is experimentally challenging to study CO oxidation by neutral heteronuclear metal oxide clusters because of the difficulty of cluster ionization and detection without fragmentation. Herein, the neutral AuVO2-4 clusters were experimentally generated and their reactions with CO and O2 were studied. The experimental results showed that CO adsorption is the dominant channel on the interactions of AuVO4 and AuVO3 with CO, and AuVO2 can pick up an O2 molecule to generate AuVO4. Theoretical studies indicated that the oxidation of the trapped CO in AuVO3,4CO into CO2 is exothermic while the reaction barriers have to be overcome at the elevated temperatures. A catalytic cycle for CO oxidation by AuVO2-4 is proposed.

AB - Oxidation of CO by gas-phase atomic clusters is being actively studied to understand the molecular-level mechanisms of heterogeneous CO oxidation over related catalytic surfaces. However, it is experimentally challenging to study CO oxidation by neutral heteronuclear metal oxide clusters because of the difficulty of cluster ionization and detection without fragmentation. Herein, the neutral AuVO2-4 clusters were experimentally generated and their reactions with CO and O2 were studied. The experimental results showed that CO adsorption is the dominant channel on the interactions of AuVO4 and AuVO3 with CO, and AuVO2 can pick up an O2 molecule to generate AuVO4. Theoretical studies indicated that the oxidation of the trapped CO in AuVO3,4CO into CO2 is exothermic while the reaction barriers have to be overcome at the elevated temperatures. A catalytic cycle for CO oxidation by AuVO2-4 is proposed.

KW - CO oxidation

KW - Gold

KW - Mass spectrometry

KW - Neutral clusters

KW - Theoretical calculations

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U2 - 10.1063/1674-0068/cjcp1812300

DO - 10.1063/1674-0068/cjcp1812300

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SN - 1674-0068

VL - 32

SP - 207

EP - 212

JO - Chinese Journal of Chemical Physics

JF - Chinese Journal of Chemical Physics

IS - 2

ER -

CO oxidation by neutral gold-vanadium oxide clusters

Abstract

Keywords

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