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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
刊名JOURNAL OF PHYSICAL CHEMISTRY B
2004-06-17
DOI10.1021/jp0495491
108期:24页:8390-8396
收录类别SCI
文章类型Article
项目归属502
产权排名1;1
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]ADJACENT CRYSTAL PLANES ; HETEROGENEOUS CATALYSIS ; KINETIC OSCILLATIONS ; PATTERN-FORMATION ; MICROSCOPY ; BOUNDARIES ; ADSORPTION ; DIFFUSION ; PT(100)
英文摘要We 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.
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WOS记录号WOS:000221965400043
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/82089
专题中国科学院大连化学物理研究所
作者单位Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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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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