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On the propagation rate of the chemical waves observed during the course of CO oxidation on a Ag/Pt(110) composite surface
Huang, WX; Bao, XH
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
2004-06-17
DOI10.1021/jp0495491
Volume108Issue:24Pages:8390-8396
Indexed BySCI
SubtypeArticle
Funding Project502
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordADJACENT CRYSTAL PLANES ; HETEROGENEOUS CATALYSIS ; KINETIC OSCILLATIONS ; PATTERN-FORMATION ; MICROSCOPY ; BOUNDARIES ; ADSORPTION ; DIFFUSION ; PT(100)
AbstractWe have analyzed the propagation rate of the chemical waves observed during the course of CO oxidation on a Ag/Pt(I 10) composite surface that were reported in our previous papers [Surf Interface Anal. 2001, 32, 179; J. Phys. Chem. B 2002, 106, 5645]. In all cases, the propagation rate v can be adequately fitted as v = v(0) + D-0/d, in which v(0) and D-0 are constants, and d is the distance between the reaction front of the chemical wave and the boundary from which the chemical wave originates. We propose that the surface species responsible for the formation of the chemical wave comes from two paths: the adsorption of molecules in the gas phase on the surface and the migration from the adjacent surface with different catalytic activity. v(0) corresponds to the contribution from the surface species due to the adsorption, and D-0/d to that of the surface species that migrates from the adjacent surface. The rate equation clearly suggests that the observed chemical wave results from the coupling between adjacent surfaces with different catalytic activities during the course of heterogeneous catalysis. These results, together with our previous reports, provide a good fundamental understanding of spillover, an important phenomenon in heterogeneous catalysis.
Language英语
URL查看原文
WOS IDWOS:000221965400043
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/82089
Collection中国科学院大连化学物理研究所
AffiliationDalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Huang, WX,Bao, XH. On the propagation rate of the chemical waves observed during the course of CO oxidation on a Ag/Pt(110) composite surface[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2004,108(24):8390-8396.
APA Huang, WX,&Bao, XH.(2004).On the propagation rate of the chemical waves observed during the course of CO oxidation on a Ag/Pt(110) composite surface.JOURNAL OF PHYSICAL CHEMISTRY B,108(24),8390-8396.
MLA Huang, WX,et al."On the propagation rate of the chemical waves observed during the course of CO oxidation on a Ag/Pt(110) composite surface".JOURNAL OF PHYSICAL CHEMISTRY B 108.24(2004):8390-8396.
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