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Abstract

Because of its great importance both in electrocatalysis and C1 chemistry applications, the adsorption of CO on metallic electrodes such as Pt, Pd, Au, Ag, RhF ̄[1~2], etc. has been extensively studied by in situ infrared spectroscopy Since 1981. In all these studies only three types of CO adsorbates, i. e. , linear (2 090~2 000 cm ̄(-1)), bridgrd (2 000~1 900 cm ̄(-1)) or multi-bonded (1900~1 800 cm ̄(-1)) species, were identified. A different absorbate, twin CO on rhodium ((Rh (CO)2) , does exist on the solid/gas interface of highly dispersed Rh or Rhn clusters[3~4] on supports,this species originating a doublet at 2100 and 2030 cm ̄(-1) for its symmetrical and asymmetrical stretch modes, respectively. To our knowledge, this doublet has not been reported yet for the Rh/electrolyre interface.

Keywords

In situ multi-step FTIRS, Surface processes, Twin adsorbates, Carbon References

Publication Date

1996-02-28

Online Available Date

1996-02-28

Revised Date

1996-02-28

Received Date

1996-02-28

References

1LeungLWH,WeaverMJetal.ElectrochemicalIRspectroscopyofCOonorderedRh(111).J.Chem.Phy.,1989,90(12):74262IkezawaY,TakamuraTetal.IRstudyoftheformationofcarbonylRhclustersonaRhelectrodeproducedbyORCinacidsolution.J.Electroanal.Chem.,1991:301,2413ZakiMI,KnozingerHetal.HighiyDispersedRhonAluminiaCatalysts.J.Phys.Chem.,1987,9l:14864ChenYQ,GuoXXetal.Effectofdispersion,COcoverageandsurfacecarbononadsorptiontyposofCOoverRh4/Al2O3.ChineseJ.Catalysis,1991,12(1):1

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