InSitu Raman Spectroscopic Study of the Oxidation and Reduction of Ag Electrode in Na_2SO_4 solution

Authors

Chen Y X
Huang K Q
Tian Z Q

Abstract

Insitu Raman spectroscopy combined with cyclic voltammogram measurements was used to investigate formation of oxygen species at Ag electrode surfaces during the oxidation and reduction process in 0.1 mol/L Na_2SO_4 solution. The time dependent Raman spectra show that at potentials positive of 0.2 V, adsorption of oxygen atom occurs, while at the potentials positive of 0.4 V, some oxygen atoms migrate into subsurface of the Ag electrode and the other form strongly bound oxygen on the surface through chemical bond. At the same potentials, part of the silver atoms are oxidized and form Ag_2SO_4. During the negative potential ex cursion, the band centered at 960 and 1 054 cm-1 respectively at about 0.3 V, indicates that the reduction current peak at 0.34 V is resulted from the reduction of the Ag_2SO_4. Another reduction current peak at 0.24 V, which corresponds to the decomposing of the surface oxygen species.

DOI Link

https://doi.org/10.61558/2993-074X.2686

Publication Date

1998-05-28

Online Available Date

1998-05-28

Revised Date

1998-05-28

Received Date

1998-05-28

Recommended Citation

Chen Y X, Huang K Q, Tian Z Q. InSitu Raman Spectroscopic Study of the Oxidation and Reduction of Ag Electrode in Na_2SO_4 solution[J]. Journal of Electrochemistry, 1998 , 4(2): Article 6.
DOI: 10.61558/2993-074X.2686
Available at: https://jelectrochem.xmu.edu.cn/journal/vol4/iss2/6

References

SavinovaER，KraftP，PetingerB，DoblhoferK．InsituRamanSpectroscopystudiesoftheinterfacebetwensilver（111）electrodesandalkalineNaFelectrolytes．J．Electroanal．Chem．，1997，430：472SasakiY，NishinaY．RamanstudyofasilverelectrodeinelectrolyteswithSO42－ions．SurfaceScience，1991，242：5493KotzR，YeagerE．Ramanstudiesofthesilver／silveroxideelectrode．J．Electroanal．chem．，1980，111：1054JohnMM，Drog，HuismanF．Electrochemicalformationandreductionofsilveroxidesinalkalinemedia．J．Electroanal．Chem．，1980，115：2115HamiltonJC，FarmerJC，AndersonRJ．InsituRamanspectroscopyofanodicfilmsformedoncopperandsilverinsodiumhydroxidesolution．J．Electrochem．Soc．，1986，133（4）：7396PetingerB，BaoX，WilcockIC，MuhlerMandErtlG，Surface－EnhancedRamanScateringformSurfaceandSubsurfaceOxygenSpeciesatMicroscopicalyWel－DefinedAgSurfaces，Phys．Rev．Let．，1994，72（10）：1561．7KondaridesDI，PapatheodorouGN，VayenasCGandVerykiosXE，InsituHighTemperatureSERSStudyofOxygenAdsorbedonAg：SupportandElectrochemcialPromotionEfects，BerBunsenges．Phys．Chem．，1993，97（5）：709．8DengJF，XuXH，WangJH．InsitusurfaceRamanspectroscopystudiesofoxygenadsorbedonelectrolyticsilver．Catal．Let．，1995，32：1599BaoX，MuhlerM，PetingerB，UchidaY，LehmpfuhlG，SchloglR，ErtlG．Theefectofwaterontheformationofstronglyboundoxygenonsilversurfaces．CatalysisLeters，1995，32：17110PetingerB，BaoX，WilcockI，MuhlerM，UchidaY，LehmpfuhlG，SchloglR，ErtlG．ThermaldecompositionofsilveroxidemonitoredbyRamanSpectroscopy：FromAgOunitstooxygenatomschemisorbedonthesilversurface．Angew．Chem．Int．Ed．Engl．，1994，33（1）：8511JiangZY，HuangSY，QianB．SemiconductorPropertiesofAg2Ofilmformedonthesilverelectrodein1MNaOhsolution．ElectrochimicaActa，1994，29（16）：246512RichmondGL．Opticalsecondharmonicgernerationasasurfaceprobeofsilverelectrode．Surf．Sci．，1984，147：11513BrwonGM，HopeGA．ASERSstudyofSO42－／Cl－ionadsorptionatacopperelectrodeinsitu．J．ElectrochimicaActa．，1990，35（3）：59514GomezBeceraJ．SalvarezaRC，ArviaAJ．Kineticstudyofsilver（I）oxidelayerelectroeduction．ElectrochimicaActa．，1990，35（3）：59515SalvarezaRC，GomezBeceraJ，ArviaAJ．Kineticsandmechanismofthesilver（I）oxidetosilver（I）oxidelayerelectrooxicationreaction．ElectrochimicaActa．，1988，33（12）：175316ChenYX，ZouSZ，HuangKQ，TianZQ．SERSstudiesofelectrode／electrolyteinterfacialwater，I．Librationofwatercorelationtohydrogenevolutionreaction．J．RamanSpectrosc．，acepted17陈燕霞，黄开启，田中群．电极／水溶液界面的SERS研究I．Ag／MgSO4体系———一种可能的检测界面pH值的方法．光散射学报，1997，9（2－3）：29218黄群健．镍电极的表面增强拉曼光谱研究．［硕士学位论文］，厦门，厦门大学化学系，1997