Identification of Active Sites in HCHO Oxidation over TiO2-Supported Pt Catalysts
Chen, Muhua1; Wang, Weizhen2; Qiu, Yuping1; Wen, He1; Li, Guangyao1; Yang, Zhiqing3; Wang, Ping1
Corresponding AuthorWang, Ping(
Source PublicationACS CATALYSIS
AbstractThe 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.
Keywordcooperative catalysis oxygen vacancy metal/oxide interface formaldehyde oxidation catalytic mechanism
Funding OrganizationNational 10000-Talents Program ; Ji Hua Laboratory
Indexed BySCI
Funding ProjectNational 10000-Talents Program ; Ji Hua Laboratory[X210141TL210]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000813231200001
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Document Type期刊论文
Corresponding AuthorWang, Ping
Affiliation1.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Ji Hua Lab, Foshan 528000, Peoples R China
Recommended Citation
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.
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