Abstract
The electrocatalytic oxidation behavior of some C 2 compounds(alcohols, aldehydes and carboxylic acids) on a Pt/Sb ad electrode prepared in situ or ex situ UPD was investigated using pontential sweep and rotating disc electrode methods. It is confirmed that Pt/Sb ad electrode show the most electrocatalytical active to the oxidation of aldehyde functional group and only a little activity to the oxidation of hydroxyl group, but no activity for the oxidation of carboxyl group. The experimental results show that the activity of the Pt/Sb ad electrode prepared by ex situ UPD is higher than that prepared by in situ UPD. The limitations of the electrocatalytic action of the Pt/Sb ad electrode are discussed. It is believed that the electrode shows activity only to the electrode reactions which are inhibited by the poisons intermediates formed in the low potential region. It is indicated by experiments that the surface transformation of the aldehyde molecules is the rate determing step of the electrocatalytic oxidation of the C 2 aldehydes and the product of the oxidation is oxalic acid. According to that a reation mechanism for the oxidation is proposed.
Keywords
Electrocatalytic oxidation, Adsorbed antimony atom, Platinum electrode, Small organic molecules alcohols, Aldehydes, Carboxylic acids
Publication Date
1996-05-28
Online Available Date
1996-05-28
Revised Date
1996-05-28
Received Date
1996-05-28
Recommended Citation
Hong Li, Lincai Jiang, Xiong Jiang.
Electrocatalytic Oxidation of Some C 2 Compounds(Alcohols, Aldehydes, and Carboxylic acids) on a Pt/Sb ad Electrode[J]. Journal of Electrochemistry,
1996
,
2(2): Article 7.
DOI: 10.61558/2993-074X.3067
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol2/iss2/7
References
1ParsonsR，VandernootT．TheOxidationofSmalOrganicMolecules，ASurveyofRecentFuelCelRe－latedResearch．J．Electroanal．Chem．，1988，257：92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，1994，10：10493李红，江琳才，蒋雄．甲醛和甲酸在Pt／Sbad电极上的电催化氧化．电化学，1995，1：564孙世刚，陈爱成．乙二醇在铂电极上吸附和氧化过程的现场FTIR反射光谱研究．高等学校化学学报，1994，15：4015ShibataM，FuruyaN．SelectiveOxidationoftheAldehydeFunctionalGroupintheGlycoaldehydeMoleculeatPtElectrodesModefiedbyAdatoms．Electrochim．Acta，1994，39：18776BardAJ，FaulknerLR．＂ElectrochemicalMethods＂．JohnWiley＆Sons，NY：1982，5237FonsecaI，JiangLincai，PletcherD．APotentialStepStudyoftheInfluenceofMetalAdatomsandSolu－tionpHontheRateofFormicAcidOxidationatPtElectrodes．J．Electrochem．Soc．，1983，130：2187
Included in
Catalysis and Reaction Engineering Commons, Engineering Science and Materials Commons, Materials Chemistry Commons, Materials Science and Engineering Commons, Physical Chemistry Commons, Power and Energy Commons
