Nanofaceted C/Re(112̄1): Fabrication, structure, and template for synthesizing nanostructured model pt electrocatalyst for hydrogen evolution reaction

Xiaofang Yang, Bruce E. Koel, Hao Wang, Wenhua Chen, Robert A. Bartynski

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We report the first observation of carbon-induced nanofaceting of a Re single crystal and its application in synthesizing a nanostructured model Pt electrocatalyst investigated using multiple surface science techniques, including low-energy electron diffraction, Auger electron spectroscopy, X-ray photoelectron spectroscopy, low-energy ion scattering, and scanning tunneling microscopy, combined with electrochemical reaction measurements. Upon annealing in acetylene at 700 K followed by annealing in vacuum at 1100 K, an initially planar Re(112̄1) surface becomes completely faceted and covered with three-sided nanopyramids exposing (011̄1), (101̄1), and (112̄0) faces. Using the faceted C/Re(112̄1) surface as a template, we have successfully fabricated a nanostructured Pt monolayer (ML) electrocatalyst. The Pt ML supported on the C/Re nanotemplate exhibits higher activity for the hydrogen evolution reaction than Pt(111). This is the first application of faceted metal surfaces as templates for synthesis of nanoscale model electrocatalyst with well-defined (facet) surface structure and controlled (facet) size on the nanometer scale, illustrating the potential for future studies of nanostructured bimetallic systems relevant to electrocatalytic reactions.

Original languageEnglish (US)
Pages (from-to)1404-1409
Number of pages6
JournalACS Nano
Volume6
Issue number2
DOIs
StatePublished - Feb 28 2012

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Keywords

  • carbon
  • electrocatalysis
  • faceting
  • nanostructure
  • platinum
  • rhenium

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