Determination of PtAuPd metal sequences for electrodeposition on graphene oxide for anode catalyst improvement in methanol oxidation

ABSTRACT

The orders of metal deposition (e.g. Pt, Au and Pd) on graphene oxide (GO) and their electrocatalytic properties were investigated. The mono-, bi- and tri-metallic nanoparticles were electrochemically prepared for catalyst preparation. The electrocatalytic activities of the catalysts in 0.5 M CH₃OH + 0.5 M H₂SO₄ solutions were examined. The results showed that the tri-metallic catalysts had higher catalytic activity and stability than the other catalysts. The results indicated that the existing Au and Pd layers before loading of Pt could improve the catalytic activities towards the methanol oxidation.

KEYWORDS:

• Methanol oxidation
• Tri-metallic catalyst
• Electrodepostion

Acknowledgments

This work was supported by the National Research University Project under Thailand's Office of the Higher Education Commission (NRU), Graduate School, Center of Excellence in Materials Science and technology, and CMU Mid-Career Research Fellowship program, Chiang Mai University.