Health & Environmental Research Online (HERO)


Print Feedback Export to File
1106041 
Journal Article 
Investigation of methanol electrooxidation on Pt and Pt-Ru in H3PO4 using MEA with PBI-H3PO4 membrane 
Modestov, AD; Tarasevich, MR; Pu, HT 
2012 
Yes 
Journal of Power Sources
ISSN: 0378-7753 
Elesevier Science B.V., P.O. Box 211 Amsterdam 1000 AE Netherlands 
205 
207-214 
Electrochemical oxidation of methanol on Pt/C and Pt-Ru/C electrocatalysts was studied by slow scan rate voltammetry at 130-190 degree C. The effects of partial pressures of water, methanol, and CO on the methanol electrooxidation rate were determined. It was found that methanol oxidation on Pt-Ru/C proceeds primarily via the "indirect" route through the formation of strongly adsorbed intermediate COads, while on Pt methanol electrooxidation occurs primarily via "direct" route through the formation of weakly adsorbed intermediates. At 140 degree C activity of Pt-Ru/C in methanol electrooxidation was found 2 orders of magnitude higher than that of Pt/C. Methanol oxidation reaction orders per water and methanol vapor pressures were determined. The main features of methanol electrooxidation both on Pt and Pt-Ru were accounted for assuming Langmuir-Hinshelwood mechanism of respective RDS. 
PBI; DMFC; Methanol; Electrooxidation; Pt; Pt-Ru 
IRIS
• Methanol (Non-Cancer)
     Search 2012
          WOS
          ProQuest
     Search Jan 30 2013
          WOS