Chemically controlled surface compositions of Ag-Pt octahedral catalysts

Yung Tin Pan, Lingqing Yan, Hong Yang

Research output: Contribution to journalArticlepeer-review


A hydrothermal method was developed to synthesize Ag-Pt nanoparticles with controlled surface composition where formaldehyde (HCHO) was utilized as a directing agent. Transmission electron microscopy and powder x-ray diffraction characterizations showed no change in bulk composition and phases as well as the size and morphology of as-made bimetallic nanocrystals. X-ray photoelectron spectroscopy study revealed, however, the enrichment of Pt on the surface as the amount of HCHO used increased. This chemically driven change in surface composition represents a nontraditional approach in the control of synthesis of bimetallic nanoparticle catalysts. A close relationship between catalytic performance and surface composition of these Ag-Pt nanocrystals was observed for electrochemical oxidation of formic acid.

Original languageEnglish (US)
Pages (from-to)179-182
Number of pages4
JournalMRS Communications
Issue number2
StatePublished - Jun 1 2017

ASJC Scopus subject areas

  • General Materials Science


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