Crystalline alloys produced by mercury electrodeposition on Pt(1 1 1) electrode at room temperature

Hang Liang Wu, Shuehlin Yau, Mau Scheng Zei

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

In situ scanning tunneling microscopy (STM) and reflection high energy electron diffraction (RHEED) were used to characterize mercury film electrodeposited onto a Pt(1 1 1) electrode at room temperature. Depending on the amount of Hg deposit, two different growth modes were observed. At low Hg coverage, crystalline (0 0 0 1)Hg adlayer accompanied by 30°-rotated (1 1 1)-Pt patches was found on Pt(1 1 1). Deposition of multilayer Hg resulted in layered PtHg2 and PtHg4 amalgams, which grew epitaxially by aligning their (2 0 1) and (1 over(1, ̄) 0) planes, respectively, parallel to the Pt(1 1 1) substrate. The preference of these epitaxial relationships for the electrochemically formed Pt-Hg intermetallic compounds on Pt(1 1 1) could result from minimization of the surface energy.

Original languageEnglish
Pages (from-to)5961-5967
Number of pages7
JournalElectrochimica Acta
Volume53
Issue number20
DOIs
StatePublished - 20 Aug 2008

Keywords

  • Electrodeposition
  • Intermetallic compound
  • Mercury
  • Pt(1 1 1)
  • Reflection high energy electron diffraction
  • Scanning tunneling microscopy

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