DICP OpenIR
Subject Area物理化学
Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde
Chen, Dan1; Qu, Zhenping1; Shen, Shijin1; Li, Xinyong1; Shi, Yong1; Wang, Yi1; Fu, Qiang2; Wu, Jingjing2; ZhenpingQu
KeywordSupport Ag Based Catalysts Formaldehyde Tpd Tpsr
Source PublicationCATALYSIS TODAY
2011-10-25
ISSN待补充
DOI10.1016/j.cattod.2011.03.059
Volume175Issue:1Pages:338-345
Indexed BySCI
SubtypeArticle
Department5
Funding Project502
Contribution Rank2,7
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordSUBSURFACE OXYGEN ; ALUMINA CATALYSTS ; CO OXIDATION ; AG CATALYSTS ; AMBIENT-TEMPERATURE ; SELECTIVE REDUCTION ; ROOM-TEMPERATURE ; AU CATALYSTS ; METHANE ; SURFACE
AbstractComparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde; Temperature programmed desorption (TPD) and temperature programmed surface reaction (TPSR) were employed to study the HCHO adsorption-desorption and the surface reaction on Ag based catalysts supported on different supports (MCM-41, SBA-15, NaY, SiO(2) and TiO(2)). According to the analysis of XRD, UV-Vis and H(2)-TPR for the as-prepared catalysts, there are four kinds of silver species on the supports, including metallic Ag particles (Ag(0)) with subsurface oxygen species, isolated Ag(+) ions, well dispersed Ag(2)O and Ag(n)(delta+) clusters. Moreover, the states, the dispersion and the amount of these silver species seem to be obviously different on different supports. No activity for HCHO oxidation is observed on any supports, and silver particles with some oxygen in bulk were more active for the adsorption and activation of HCHO. MCM-41 and SiO(2) supported silver catalysts give new adsorption sites for HCHO, and it is easily activated at lower temperatures and shows better surface reaction activity for HCHO oxidation. The desorption temperature for HCHO over SBA-15 and NaY supported silver catalysts is relatively higher, and its reaction performance is worse. However no surface reaction is observed on Ag/TiO(2) catalyst during experiments. It is also found that HCHO molecular adsorbed on silver sites could be was oxidized into dioxymethylene (DOM) and formate surface species, and they reacts with oxygen to form CO(2) during TPSR. The activities of different silver based catalysts for HCHO oxidation were closely related to their abilities for the formation of DOM and formate species. (C) 2011 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000295735400048
Citation statistics
Cited Times:71[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115501
Collection中国科学院大连化学物理研究所
Corresponding AuthorZhenpingQu
Affiliation1.Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn MOE, Sch Environm Sci & Technol, Dalian 116024, Linggong, Peoples R China
2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Chen, Dan,Qu, Zhenping,Shen, Shijin,et al. Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde[J]. CATALYSIS TODAY,2011,175(1):338-345.
APA Chen, Dan.,Qu, Zhenping.,Shen, Shijin.,Li, Xinyong.,Shi, Yong.,...&ZhenpingQu.(2011).Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde.CATALYSIS TODAY,175(1),338-345.
MLA Chen, Dan,et al."Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde".CATALYSIS TODAY 175.1(2011):338-345.
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