Electrocatalytic Oxidation of Formaidehyde and Formic Acid on a Pt/Sb_(ad) Electrode

Authors

Hong Li, Department of Chemistry,South China Normal University,Guangzhou 510631;
Lincai Jiang, Department of Chemistry,South China Normal University,Guangzhou 510631;
Xiong Jiang, Department of Chemistry,South China Normal University,Guangzhou 510631;

Abstract

The electrocatalytic activity for the oxidation of formaldehyde and formic acid ona Sb-modified platinum (Pt/Sb_(ad))was investigated.Results showed that the Pt/Sb_(ad) electrode waselectrocatalytically more active than a Pt electrode in the anodic oxidation of formaldehyde and formicacid.In the case of formaldehyde,an oxidation peak appeared at a potential of ca.0.7V.During theoxidation of formic acid,a 4-fold increase in the 1st peak current was observed.The Sb-modifiedplatinum electrode was found to be most electrocatalytically active at a coverage of 0.75±0.05.Theelectrocatalytic activity of the Pt/Sb_(ad) electrode can be best explained in terms of the geometrical effect,which may lead to the inhibition of the formation of the adsorbed poison Pt-C=O.The reactionmechanism for the catalytic oxidation of the two subetances at a lower potential on a Pt/Sb_(ad) electrodewas suggested.The effects of other factors including electrolysis time,deposition potential and mediaon the electrocatalytic activity were also studied and discussed.

Keywords

Electrocatalytic oxidation, Adsorbed antimony atom, Underpotentialdeposition, Platinum electrode, Formaldehyde

DOI Link

https://doi.org/10.61558/2993-074X.1264

Publication Date

1995-02-28

Online Available Date

1995-02-28

Revised Date

1995-02-28

Received Date

1995-02-28

Recommended Citation

Hong Li, Lincai Jiang, Xiong Jiang. Electrocatalytic Oxidation of Formaidehyde and Formic Acid on a Pt/Sb_(ad) Electrode[J]. Journal of Electrochemistry, 1995 , 1(1): 56-64.
DOI: 10.61558/2993-074X.1264
Available at: https://jelectrochem.xmu.edu.cn/journal/vol1/iss1/9

References

1ParsonsR，VanderNootT．ASurveyofrecentfuelcellrelatedresearch．J．Electroanal．Chem．，1988，257：9～452MotooS，ShibataM．Afastpaallelpathforformaldehydeoxidaliononaplatinumelectrodebyoxygenadsorbingad－atoms（PartⅨ）．J．Electroanal．Chem．，1982，139：119～1303ShibataM，MotooS．SelectivitybySbandBiad－atomsonPtelectrodesatoxidationofHCHOin0．5MH＿2SO＿4containingethanol．电气化学，1988，58（6）：445～4464Fernandez－VegaA，FeliuJMetal．FormicacidoxidationonthePt（100）－Sbsystem（PartⅡ）．J．Electroanal．Chem．，1989，258：101～1135SunSG，LipkowskiJetal．ElectrocatalyticoxidationofformicacidandmethanolattheamorphonsPt＿（66）Sb＿（34）electrede．J．Electroanal．Soc．，1990，137：2443～24516李红，江琳才，蒋雄．锑（Ⅲ）在铂电极上的欠电位沉积行为．物理化学学报，1994，10（11）：1049～10547江琳才．铂电极上吸附铋原子对甲酸氧化电催化的研究．华南师范大学学报，1983，（2）：1～98NishimuraK，OhnishiRetal．SurfacespeciesproducedonPtelectrodesduringHCHOoxidationinsulfuricacidsolutionasstudiedbyIRRASandDEMS．J．Electroanal．Chem．，1989，258：219～2259孙世刚，王津建，穆纪千．甲酸在Pt（100）单晶电极表面解离吸附过程的动力学．物理化学学报，1992，8（6）：732～73410CasesF，MorallonEetal．Voltammetricstudyof