Characterizations of core-shell nanoparticle catalysts for methanol electrooxidation

Mathew M. Maye, Jin Luo, Wai Ben Chan, Li Han, Nancy Kariuki, H. Richard Naslund, Mark H. Engelhard, Yuehe Lin, Randoll Sze, Chuan Jian Zhong

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

This paper describes the results of an investigation of the structure and composition of core-shell gold and alloy nanoparticles as catalytically active nanomaterials for potential fuel cell catalysis. Centered on the electrocatalytic methanol oxidation, we show three sets of results based on electrochemical, surface, and composition characterizations. First, electrochemical studies have revealed that the nanostructured catalysts are active towards the electrooxidation of methanol and carbon monoxide. Second, X-ray photoelectron spectroscopy (XPS) data have shown that the organic encapsulating shells can be effectively removed electrochemically or thermally, which involves the formation of oxides on the nanocrystals. Thirdly, direct current plasma - atomic emission spectrometry (DCP-AES) has revealed insights for the correlation of the composition of alloy nanoparticles with the catalytic activities. Implications of these results to the design of nanostructured catalysts will also be discussed.

Original languageEnglish (US)
Pages (from-to)391-396
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume756
StatePublished - Jul 25 2003
Externally publishedYes
EventSolid State Ionics 2002 - Boston MA, United States
Duration: Dec 2 2002Dec 5 2002

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Maye, M. M., Luo, J., Chan, W. B., Han, L., Kariuki, N., Naslund, H. R., Engelhard, M. H., Lin, Y., Sze, R., & Zhong, C. J. (2003). Characterizations of core-shell nanoparticle catalysts for methanol electrooxidation. Materials Research Society Symposium - Proceedings, 756, 391-396.