Studies of Abnormal Infrared Effects of Nanometer Thin Films of Transition Metals and Alloys in Acid Solutions

Authors

Shi-gang SUN, Department of Chemistry,College of Science and Technology, Yanbian University,Yanji 133002;
Ming-sen ZHENG, State key Lab. For Phys.Chem. of Solid Surfaces, Dept. of Chem., Institute of Phys.Chem.,Xiamen University, Xiamen 361005,China;
Guo-qiang LU, State key Lab. For Phys.Chem. of Solid Surfaces, Dept. of Chem., Institute of Phys.Chem.,Xiamen University, Xiamen 361005,China;
Li-rong CAI, State key Lab. For Phys.Chem. of Solid Surfaces, Dept. of Chem., Institute of Phys.Chem.,Xiamen University, Xiamen 361005,China;
Sheng-pei CEHN, State key Lab. For Phys.Chem. of Solid Surfaces, Dept. of Chem., Institute of Phys.Chem.,Xiamen University, Xiamen 361005,China;
Xiao-yin XIAO, State key Lab. For Phys.Chem. of Solid Surfaces, Dept. of Chem., Institute of Phys.Chem.,Xiamen University, Xiamen 361005,China;

Corresponding Author

Shi_gang SUN

Abstract

The adsorption of CO on electrodes of nanometer thin films of transition metals (Pt, Pd, Rh, Ru) and alloys (PtPd, PtRu) prepared under cyclic voltammetric conditions has been studied by in situ FTIR spectroscopy. The abnormal infrared effects (AIREs) have been explored as a novel and general phenomenon. The AIREs consist mainly in the inversion of the direction of IR band and the significant enhancement of IR absorption by adsorbed CO species. It was revealed that the enhanced IR absoroption of adsorbed species in AIREs depends strongly on the nature of metal or alloy, and on the structure and the thickness of the thin film. The investigation of AIREs will contribute not only to develop the theory of reflectance IR spectroscopy as well as interfacial electrochemistry, but also to increase the determining sensitivity in applications of interfacial and surface analysis.

Keywords

Electrodes of nanometer thin film, Adsorption of CO, Abnormal infrared effects, in situ FTIRS

DOI Link

https://doi.org/10.61558/2993-074X.1368

Publication Date

2000-02-28

Online Available Date

2000-02-28

Revised Date

2000-02-28

Received Date

2000-02-28

Recommended Citation

Shi-gang SUN, Ming-sen ZHENG, Guo-qiang LU, Li-rong CAI, Sheng-pei CEHN, Xiao-yin XIAO. Studies of Abnormal Infrared Effects of Nanometer Thin Films of Transition Metals and Alloys in Acid Solutions[J]. Journal of Electrochemistry, 2000 , 6(1): 25-30.
DOI: 10.61558/2993-074X.1368
Available at: https://jelectrochem.xmu.edu.cn/journal/vol6/iss1/2

References

[1]　JacobsPW ,WindSJ,etal.Nanometersizeplatinumparticlearray :catalyticandsurfacechemicalproper ties[J].Surf.Sci.,1997,372 :2 49.

[2 ]　ChenShengpei,SunShigang ,HuangTaisan .TheStructureandtheElectroanalyticActivityofElectrodeofPlatinizedPlatinumSupportedonGlassyCarbon[J].ChineseScienceBulletin .1995 ,40 (5 ) :377.

[3]　LuGQ ,SunSG ,ChenSP ,etal.NovelpropertiesofdispersedPtandPdthinlayersupportedonGCforCOadsorptionstudiedusinginsituMS_FTIRspectroscopy[J].J.ElectroanalChem ,1997,42 1:19.

[4 ]　SunSG ,YangDF ,TianZW .InsituFTIRStudiesontheAdsorptionandOxidationofn_propanolandiso propanolataPlatinumElectrode[J].J .ElectroanalChem ,1990 ,2 89:177.

[5 ]　LuGQ ,SunSG ,etal.InsituFTIRspectroscopicstudiesofadsorptionofCO ,SCN-andPoly(o_phenylenediamine)onelectrodesofnanometerthinfilmsofPt,PdandRh———Theabnormalinfraredeffects(AIREs) .Langmuir,1999,inpress .

[6 ]　HartsteinA ,KirtlyJR ,etal.Enhancementoftheinfraredabsorptionfrommolecularmonolayerswiththinmetaloverlayers[J].Phys.Rev .Lett.1980 ,45 :2 0 1.

[7]　OsawaM .Dynamicprocessesineletrochemicalreactionsstudiedbysurface_enhancedinfraredabsorptionspec troscopy (SEIRAS) [J].Bull.Chem .Soc.Jpn .,1997,70 :2 86 1.

[8]　SunShi_Gang ,CaiWen_Bin ,etal.EffectsofsurfacestructureofAufilmonIRabsorptionenhancementforCOadsorption———Acombinedstudyofcyclicvoltammetry ,scanningtunnelingmicroscopyandsurfaceen hancedIRspectroscopy[J].J.Phys .Chem .B .1999,10 3:2 46 0 .