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New insights into the influence mechanism of H2O and SO2 on Pt-W/Ti catalysts for CO oxidation
Xu, Tieyao1,2; Liu, Xiaolong2; Zhu, Tingyu2,3; Feng, Chenglin1,2; Hu, Yutao2; Tian, Mengkui1
2022-01-17
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Pages12
AbstractA series of anatase TiO2 catalysts loaded with 0.1 wt% Pt and n% WO3 (0.1Pt-nW/Ti-A, n = 0, 1, 2, 5, and 10) were prepared via a two-step impregnation method. Among the catalysts, 0.1Pt-5W/Ti-A showed the best CO oxidation activity and outstanding stability in the presence of H2O and SO2. H2O can significantly improve the catalytic oxidation efficiency of the catalyst, and doping of WO3 apparently enhances the sulfur tolerance of the catalyst. The results of TEM, EDS, XRD and Raman analyses indicated that Pt and W both had a very high degree of dispersion in 0.1Pt-5W/Ti-A. XPS and H-2-TPR results showed that there was a certain effect between WO3 and Pt, as well as between WO3 and TiO2. From XPS and SO2-TPD results, it can be inferred that WO3 doping inhibited the adsorption of SO2, and the amount of S deposited on the catalyst surface did not increase with the reaction time. The results of in situ DRIFTS measurements and (H2O)-O-18 isotope labeling experiments revealed that H2O promoted the catalytic oxidation of CO through two paths. Consequently, the CO oxidation mechanism of 0.1Pt-5W/Ti-A in the presence of H2O and SO2 is proposed.
DOI10.1039/d1cy01984h
Language英语
WOS KeywordTEMPERATURE PROX REACTION ; METAL-SUPPORT INTERACTIONS ; CARBON-MONOXIDE ; PT/TIO2 CATALYSTS ; REDUCTION ; OXIDES ; NOX ; HCOO ; NH3 ; XPS
Funding ProjectNational Natural Science Foundation of China[51938014] ; National Natural Science Foundation of China[52170118]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Natural Science Foundation of China
WOS IDWOS:000747976000001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51856
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Xiaolong; Zhu, Tingyu
Affiliation1.Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China
2.Chinese Acad Sci, Innovat Acad Green Manufacture, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Xu, Tieyao,Liu, Xiaolong,Zhu, Tingyu,et al. New insights into the influence mechanism of H2O and SO2 on Pt-W/Ti catalysts for CO oxidation[J]. CATALYSIS SCIENCE & TECHNOLOGY,2022:12.
APA Xu, Tieyao,Liu, Xiaolong,Zhu, Tingyu,Feng, Chenglin,Hu, Yutao,&Tian, Mengkui.(2022).New insights into the influence mechanism of H2O and SO2 on Pt-W/Ti catalysts for CO oxidation.CATALYSIS SCIENCE & TECHNOLOGY,12.
MLA Xu, Tieyao,et al."New insights into the influence mechanism of H2O and SO2 on Pt-W/Ti catalysts for CO oxidation".CATALYSIS SCIENCE & TECHNOLOGY (2022):12.
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