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研究论文

镀Pd的GC电极上HCOOH的电催化氧化

  • 周全 ,
  • 张存中 ,
  • 陆晓林 ,
  • 吴仲达
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  • 北京师范大学化学系!北京100875,北京师范大学化学系!北京100875,北京师范大学化学系!北京100875,北京师范大学化学系!北京100875

收稿日期: 2000-08-28

  修回日期: 2000-08-28

  网络出版日期: 2000-08-28

The Electro-catalytic Oxidation of HCOOH on Electrodeposited Pd Electrode

  • Zhou Quan ,
  • Zhang Cunzhong ,
  • Lu xiaolin ,
  • Wu Zhongda
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  • (Dept. of Chem., Beijing Normal Univ., Beijing, 100875,China

Received date: 2000-08-28

  Revised date: 2000-08-28

  Online published: 2000-08-28

摘要

在玻璃碳 (GC)基底上电沉积Pd ,应用SEM观测Pd沉积层的表面形貌 ,用循环伏安法研究了Pd/GC电极上HCOOH在HClO4溶液中的电氧化行为 .结果表明 ,Pd的电沉积条件影响电极的催化性能 .在高电流密度下制得的Pd/GC电极对HCOOH的电氧化具有比纯Pd电极更高的催化活性 .当电极表面生成PdO时 ,HCOOH被电氧化的活性很低 ,而在PdO还原后生成的Pd表面 ,HCOOH的电氧化显示极高的活性 .本文还讨论了Pd(Ⅱ )离子对HCOOH电氧化过程的影响 .

关键词: 电沉积; ; 甲酸; 电氧化

本文引用格式

周全 , 张存中 , 陆晓林 , 吴仲达 . 镀Pd的GC电极上HCOOH的电催化氧化[J]. 电化学, 2000 , 6(3) : 329 -334 . DOI: 10.61558/2993-074X.1394

Abstract

The coherent electroplates were prepared by electro depositing Pd on supporting materials glassy carbon. The surface morphology of the electrodes was examined by SEM. The electro oxidation of HCOOH in HClO 4 solution was investigated by using cyclic voltammetry. The results show that the deposited conditions in the preparation of electrodes by electro depositing Pd affect the electrodes electro catalytic activity to the oxidation of HCOOH. The platinized Pd electrode on GC substrates using large current density is of higher catalytic activity to the oxidation of HCOOH than Pd electrode. The electro catalytic activity of PdO formed on the Pd surface through electrochemical reactions is very low, while the freshly reduced Pd surface shows high catalytic activity to HCOOH oxidation. The effect of Pd(Ⅱ) ions on the electrochemical oxidation of HCOOH is discussed.

参考文献

[1 ] CaponA ,ParsonsR .Theoxidationofformicacidonnoblemetalelectrodes,(Ⅱ )Acomparisonofthebe haviourofpureelectrode[J].Electroanal.Chem .&InterfacialElectroanal.Chem .,1 973,44:2 39. [2 ] YangYiyun ,SunShigang .Kineticsofirreversiblereactionsonplatinumsinglecrystalelectrodes (Ⅲ ) [J] ActaPhysico chimicaSinica ,1 998,1 4(1 0 ) :91 9. [3] GasteigerHA ,MarkovicN ,RossJrPN ,CairnsEJ .electro oxidationofsmallorganicmoleculesonwellcharacterizedPt Rualloy[J].Electrochim .Acta .,1 994,39:1 82 5 . [4 ] MarkovicNM ,GasteigerHA ,RossJrPN ,JiangXD ,VillegasI ,WeaverMJ .Electro_oxidationmecha nismsofmetanolandformicacidonPt_Rualloysurfaces[J].Electrochim .Acta .,1 995 ,40 :91 . [5 ] El ShafeiAA .StudyofnickelupdatapolycrystallinePtelectrodeanditsinfluenceonHCOOHoxidationinacidicandnearlyneutralmedia[J].J .Electroanal.Chem .,1 998,447:81 . [6 ] ZengHualiang ,WuZhongda ,et .al.Handbookofelectroplatingtechnique (the 2ndEd) [M ].MechanicalIndustryPress ,1 997. [7] PaveseAG ,SolisVM .Comparativeinvestigationofformicacidandformaldehydeoxidationonpalladiumbyarotatingring discelectrodeandon linemassspectroscopyinacidicsolutions [J].J .Electroanal.Chem .,1 991 ,30 1 :1 1 7. [8] ZhangXG ,ArikawaT ,et.al.Electrocatalyticoxidationofformicacidonultrafinepalladiumparticlessup portedonaglassyCarbon[J].Electrochim .Acta .,1 995 ,40 :1 889. [9] ZhongQiling ,WuWen ,LiWuhu ,TianZhongqun .Internationbetween palladiummicroparticlesandpolyanlineinelectro catalyticprocessforoxidationofformicacid[J].ActaPhysico chimicaSinica ,1 994,1 0 :81 3. [1 0 ] CaponA ,ParsonsR .Theoxidationofformicacidonnobelmetalelectrodes ,part 4.platinum + paladiumalloys[J].J .Electroanal.Chem .,1 975 ,6 5 :2 85 .
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