ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Platinum nanospheres electrodeposited on titanium oxide/titanium modified electrode for improved electrocatalytic activity of methanol electrooxidation

Leila Irannejad, Seyed Javad Ahmadi, and Mojtaba Shamsipur

Tarbiat Modares University, Tehran, Iran

E-mail: mshamsipur@yahoo.com

Abstract: The surface of titanium electrode was electrooxidized by simple anodizing method to form a TiO₂ layer on the Ti electrode surface in H₂SO₄ solution. Then Pt nanospheres were synthesized on the TiO₂ surface by electroredution of PtCl₄ in acidic medium. The prepared modified electrode was fully characterized and applied to methanol electrooxidation. In comparison with pure Pt, the deposition of Pt nanoparticles on TiO₂ surface led to a significant increase in catalytic efficiency of Pt toward the electrocatalytic oxidation of methanol. The poisoning of catalyst surface was investigated by electrooxidation of CO on this modified electrode, which showed a considerable reduction in CO oxidation potential.

Keywords: Platinum nanospheres ; Titanium oxide ; Electrocatalysis ; Methanol oxidation ; Direct methanol fuel cell 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00727-8

Chemical Papers 73 (9) 2153–2164 (2019)