Promotion of catalytic activity for methanol electro-oxidation on CoPc-Pt/C co-catalysts

作者：Wu JingJie; Xu Yimin; Pan Mu^*; Ma WenTao; Tang HaoLin

来源：Chinese Science Bulletin, 2009, 54(6): 1032-1036.

DOI：10.1007/s11434-009-0108-4

• CoPc
• Pt/C catalyst
• co-catalysts
• methanol
• electro-oxidation

The catalytic activity for methanol electro-oxidation on CoPc-Pt/C co-catalysts, prepared by impregnation method, was studied in details through electrochemical methods. Cyclic voltammetry (CV) result demonstrates that CoPc has higher forward anodic peak current density and j (f) /j (b) value (forward anodic peak current density/backward anodic peak current density) than Pt/C. Chronoamperometry (CA) analysis indicates that CoPc-Pt/C exhibits both excellent transient current density and stable current density for methanol electro-oxidation compared with Pt/C. Two main mechanisms related to the promotion of catalytic activity are as follows: CoPc-Pt/C has the activity of tolerance to carbonaceous intermediates, thus inhibiting the self-poisoning of catalysts; CoPc-Pt/C owns prominent intrinsic catalytic activity indicated by the apparent activation energy for methanol oxidation on CoPc-Pt/C, which is 18 kJ/mol, less than that on Pt and PtRu catalysts as reported.

• 出版日期2009-3
• 单位武汉理工大学