In‐situ STM studies of electrochemical underpotential deposition of Pb on Au(111)

M. P. Green, M. Richter, X. Xing, Daniel Alberto Scherson, K. J. Hanson, P. N. Ross, R. Carr, I. Lindau

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A modified scanning tunnelling microscope (STM) has been used to observe in‐situ deposition and stripping of an electrochemical film. With STM tip and sample immersed in an acid electrolyte, single atomic steps on Au(111) have been imaged during the deposition and stripping of a monolayer‐thick, underpotential deposit (UPD) of Pb. Integration of the electrochemical current passed during the film deposition and evidence from the STM images themselves confirm monolayer coverage. Our images show enhanced film growth at step edges and defect sites. Observations of single plating and stripping cycles indicate that the Au substrate returns unaltered. Except for atomic resolution images of Au(111), which we have not yet achieved in an electrolyte, all types of Au surface features seen in air are reproduced under the electrolytic solution. The modifications made to our STM in order to perform in‐situ electrochemical experiments are described. 1988 Blackwell Science Ltd

Original languageEnglish
Pages (from-to)823-829
Number of pages7
JournalJournal of Microscopy
Volume152
Issue number3
DOIs
Publication statusPublished - 1988 Jan 1
Externally publishedYes

Keywords

  • Au(111)
  • electrochemistry
  • Pb
  • Scanning tunnelling microscope (STM)
  • thin film
  • underpotential deposition (UPD)

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

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    Green, M. P., Richter, M., Xing, X., Scherson, D. A., Hanson, K. J., Ross, P. N., Carr, R., & Lindau, I. (1988). In‐situ STM studies of electrochemical underpotential deposition of Pb on Au(111). Journal of Microscopy, 152(3), 823-829. https://doi.org/10.1111/j.1365-2818.1988.tb01455.x