Electrochemical reactivity of carbon monoxide and sulfur adsorbed on Ni(111) and Ni(110) in a lithium-based solid polymer electrolyte in ultrahigh vacuum

Lin Feng Li, Dana Totir, Gary S. Chottiner, Daniel Alberto Scherson

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4 Citations (Scopus)

Abstract

The effects of adsorbed carbon monoxide and sulfur on the electrochemical properties of Ni(111) and Ni(110) in LiClO4-poly(ethylene oxide) (PEO) solutions have been examined by cyclic voltammetry at a temperature of 333 K in ultrahigh vacuum (UHV) environments. Rather sharp peaks were found in the first scan in the negative direction for c(4 × 2)CO and sulfur overlayers on Ni(111) centered at 0.5 and 1.25 V, respectively. In contrast, the voltammetric features observed in similar experiments for Ni(110) exposed to 30 L of CO and for Ni(110)-c(2 × 2)S were broad and not as well defined. These processes are attributed to reactions between Li underpotential deposition (UPD) and CO and sulfur overlayers to yield, correspondingly, Li2O (and a polymeric Li-CO adduct) and Li2S as the most likely products.

Original languageEnglish
Pages (from-to)8013-8016
Number of pages4
JournalJournal of Physical Chemistry B
Volume102
Issue number41
Publication statusPublished - 1998 Oct 8
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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