Underpotential deposition of aluminum and alloy formation on polycrystalline gold electrodes from AlCl3/EMIC room-temperature molten salts

Jae Joon Lee, In Tae Bae, Daniel Alberto Scherson, Barry Miller, Kraig A. Wheeler

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Interfacial processes occurring at polycrystalline gold in acidic 1-ethyl-3-methylimidazolium chloroaluminate melts at room temperature, at potentials more positive than aluminium bulk deposition, include both Al underpotential deposition and the formation of Al/Au alloys. This information complements that reported in the literature for Al electrodeposition on Au in AlCl3/NaCl melts at temperatures of 200°C and higher. Cyclic voltammetry and chronopotentiometry suggest that at least two alloys form, and there is fast phase transformation between these intermetallic compounds at room temperature in the aluminum underpotential region. This transformation with thin gold films was slower than that in bulk gold electrodes.

Original languageEnglish
Pages (from-to)562-566
Number of pages5
JournalJournal of the Electrochemical Society
Volume147
Issue number2
DOIs
Publication statusPublished - 2000 Feb 1
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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