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The catalytic activity for methanol electro-oxidation on CoPc-Pt/C co-catalysts, prepared by impregna-tion method, was studied in details through electrochemical methods. Cyclic voltammetry (CV) result demonstrates that CoPc has higher forward anodic peak current density and jf / jb 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 pro-motion of catalytic activity are as follows: CoPc-Pt/C has the activity of tolerance to carbonaceous in-termediates, thus inhibiting the self-poisoning of catalysts; CoPc-Pt/C owns prominent intrinsic cata-lytic 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.
The catalytic activity for methanol electro-oxidation on CoPc-Pt / C co-catalysts, prepared by impregna-tion method, was studied in details through electrochemical methods. Chronoamperometry (CA) analysis indicates that both CoPc-Pt / C exhibits both excellent transient current density and stable current density for methanol electro-oxidation compared to with Pt / C. Two main mechanisms related to the pro-motion of catalytic activity are as follows: CoPc-Pt / C has the activity of tolerance to carbonaceous in-termediates, thus inhibiting the self-poisoning of catalysts; CoPc-Pt / C owns prominent intrinsic cata-lytic activity 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.