Bimetallic cluster provides a higher activity electrocatalyst for methanol oxidation

Brenda L. García, Burjor Captain, Richard D. Adams, Ana B. Hungria, Paul A. Midgley, Sir John Meurig Thomas, John W. Weidner

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The cluster complex Pt2Ru4(CO)18 was used as a precursor to prepare a 60 wt% 1:2 Pt:Ru nanoparticles on carbon (PtRu/C) for use as an electrocatalyst for methanol oxidation. This bimetallic carbonyl cluster complex was found to provide smaller, more uniform bimetallic nanoparticle that exhibited higher electrocatalytic activity than a 60 wt% 1:1 Pt:Ru commercial catalyst from E-Tek. Using bimetallic cluster precursors simplifies the synthetic procedures by reducing the need for high temperature reduction and assures a more intimate mixing of the two different metals. Transmission electron microscopy (TEM) images of the catalyst obtained from the cluster precursor showed bimetallic nanoparticles having a narrow size range of 2-3 nm that were dispersed uniformly over the surface of the support. Images of the commercial catalyst showed particles 3-4 nm in diameter that tended to agglomerate near the edges of the carbon support particles. Cyclic voltammograms of methanol oxidation from the two catalysts showed significantly higher activity for the cluster-derived catalyst. The onset potential for methanol oxidation for the cluster-derived catalyst was approximately 170 mV lower than that of the commercial catalyst at 100 A/g Pt, and approximately 250 mV lower at 400 A/g Pt.

Original languageEnglish
Pages (from-to)121-130
Number of pages10
JournalJournal of Cluster Science
Volume18
Issue number1
DOIs
StatePublished - Mar 1 2007
Externally publishedYes

Fingerprint

electrocatalysts
Electrocatalysts
Nanoparticles
Methanol
methyl alcohol
catalysts
Oxidation
oxidation
Catalysts
Carbon
Carbon Monoxide
Transmission Electron Microscopy
nanoparticles
Metals
Temperature
carbon
Catalyst supports
Catalyst activity
Transmission electron microscopy
transmission electron microscopy

Keywords

  • Catalyst
  • Fuel cell
  • Methanol
  • PtRu nanoclusters

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

García, B. L., Captain, B., Adams, R. D., Hungria, A. B., Midgley, P. A., Thomas, S. J. M., & Weidner, J. W. (2007). Bimetallic cluster provides a higher activity electrocatalyst for methanol oxidation. Journal of Cluster Science, 18(1), 121-130. https://doi.org/10.1007/s10876-006-0089-2

Bimetallic cluster provides a higher activity electrocatalyst for methanol oxidation. / García, Brenda L.; Captain, Burjor; Adams, Richard D.; Hungria, Ana B.; Midgley, Paul A.; Thomas, Sir John Meurig; Weidner, John W.

In: Journal of Cluster Science, Vol. 18, No. 1, 01.03.2007, p. 121-130.

Research output: Contribution to journalArticle

García, BL, Captain, B, Adams, RD, Hungria, AB, Midgley, PA, Thomas, SJM & Weidner, JW 2007, 'Bimetallic cluster provides a higher activity electrocatalyst for methanol oxidation', Journal of Cluster Science, vol. 18, no. 1, pp. 121-130. https://doi.org/10.1007/s10876-006-0089-2
García, Brenda L. ; Captain, Burjor ; Adams, Richard D. ; Hungria, Ana B. ; Midgley, Paul A. ; Thomas, Sir John Meurig ; Weidner, John W. / Bimetallic cluster provides a higher activity electrocatalyst for methanol oxidation. In: Journal of Cluster Science. 2007 ; Vol. 18, No. 1. pp. 121-130.
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