Identification of Active Sites in HCHO Oxidation over TiO2-Supported Pt Catalysts

doi:10.1021/acscatal.2c01150

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	Identification of Active Sites in HCHO Oxidation over TiO2-Supported Pt Catalysts
	Chen, Muhua 3; Wang, Weizhen 2; Qiu, Yuping 3; Wen, He 3; Li, Guangyao 3; Yang, Zhiqing 1; Wang, Ping 3
刊名	ACS CATALYSIS
	2022-05-06
卷号	12 期号:9 页码:5565-5573
关键词	cooperative catalysis oxygen vacancy metal/oxide interface formaldehyde oxidation catalytic mechanism
ISSN号	2155-5435
DOI	10.1021/acscatal.2c01150
通讯作者	Wang, Ping(mspwang@scut.edu.cn)
英文摘要	The cooperative catalysis between noble metals and oxygen vacancies in reducible oxides plays an important role in many heterogeneous catalytic reactions, but definite identification of active sites remains challenging. Herein, we report an experimental identification of active sites in HCHO oxidation over TiO2-supported Pt catalysts by means of microscopic and spectroscopic techniques. Pt/TiO2, catalysts with tunable oxygen vacancy concentrations were designed and fabricated based on hydrogen spillover. A combination of aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy allowed us to directly observe the spatial distribution of oxygen vacancies and probe its correlation with the catalytic activity. In situ diffuse reflectance infrared Fourier transform spectroscopy in combination with the online gas chromatography technique was employed to investigate the functionalities of Pt and oxygen vacancies in HCHO oxidation. Our study revealed that HCHO oxidation occurred at the Pt/TiO2-x interface via a cooperative mechanism: oxygen vacancies served as active sites for chemically absorbing HCHO molecules and the adjacent Pt site dissociatively activated O-2.
资助项目	National 10000-Talents Program ; Ji Hua Laboratory[X210141TL210]
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000813231200001
资助机构	National 10000-Talents Program ; Ji Hua Laboratory
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174404]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Ping
作者单位	1.Ji Hua Lab, Foshan 528000, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
推荐引用方式 GB/T 7714	Chen, Muhua,Wang, Weizhen,Qiu, Yuping,et al. Identification of Active Sites in HCHO Oxidation over TiO2-Supported Pt Catalysts[J]. ACS CATALYSIS,2022,12(9):5565-5573.
APA	Chen, Muhua.,Wang, Weizhen.,Qiu, Yuping.,Wen, He.,Li, Guangyao.,...&Wang, Ping.(2022).Identification of Active Sites in HCHO Oxidation over TiO2-Supported Pt Catalysts.ACS CATALYSIS,12(9),5565-5573.
MLA	Chen, Muhua,et al."Identification of Active Sites in HCHO Oxidation over TiO2-Supported Pt Catalysts".ACS CATALYSIS 12.9(2022):5565-5573.