Pt/MoO3-WO3/CNTs catalyst with excellent performance for methanol electrooxidation

A composite Pt-based catalyst was prepared by loading MoO3 and WO3 nanoparticles onto carbon nanotubes (Pt/MoO3-WO3/CNTs). There was a uniform nanoparticle distribution with small particle sizes. This was achieved through an in situ self-assembly method using poly(diallyldimethylammo-nium chloride) as a linker and through subsequent immobilization of the Pt using ethylene glycol as a reducing agent. The total amount of oxide in the CNTs was 10 wt%, and when the molar ratio of MoO3 to WO3 was 1:0.5, Pt/MoO3-WO3/CNTs showed the highest activity for the electrocatalytic oxidation of methanol with forward peak current of 835 A/gPt. Because MoO3 and WO3 improve the electrocatalytic activity for methanol, CO oxidation ability, and the durability of the catalyst, the Pt/MoO3-WO3/CNTs catalyst exhibited excellent performance for the electrocatalytic oxidation of methanol.

Graphical AbstractPt/MoO3-WO3/CNTs with uniform nanoparticle distribution was prepared with poly(diallyldimethylammonium chloride). Incorporating MoO3 and WO3 to improve the electrocatalytic activity, CO oxidation, and durability, the Pt/MoO3-WO3/CNTs catalyst showed excellent performance for the electrocatalytic oxidation of methanol.Figure optionsDownload full-size imageDownload as PowerPoint slide