Improving catalytic efficiency in the methanol oxidation reaction by inserting Ru in face-centered cubic Pt nanoparticles prepared by a new surfactant, tert-octanethiol

Sen F., Goekagac G.

ENERGY & FUELS, vol.22, no.3, pp.1858-1864, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1021/ef700575t
  • Journal Name: ENERGY & FUELS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1858-1864
  • Middle East Technical University Affiliated: Yes


PtRu/C catalysts, which have different atomic percent ratios of Pt and Ru (Pt/Ru = 0.8 (catalyst A), 2.1 (catalyst B), and 3.5 (catalyst C)), were prepared using PtCl4 and RuCl3 as starting materials and tert-octanethiol as a surfactant for the first time. Each was characterized by X-ray diffraction, transmission electron microscopy, energy dispersive analysis, X-ray photoelectron spectroscopy, cyclic voltammetry, and elemental analysis, and their activities were determined toward the methanol oxidation reaction. It has been found that catalyst A is 6 times more active toward the methanol oxidation reaction compared to the commercial catalyst. X-ray diffraction results indicated that more than 90% of the ruthenium in catalyst A inserts into the face-centered cubic (fee) Pt crystalline structure, while more than 90% of Ru, present in catalyst B, remains as crystalline and/or amorphous Ru and/or RuO2. In catalyst C, approximately half of the Ru incorporates into the fcc platinum crystalline structure.