TY - JOUR
T1 - Electrochemical reactivity of carbon monoxide and sulfur adsorbed on Ni(111) and Ni(110) in a lithium-based solid polymer electrolyte in ultrahigh vacuum
AU - Li, Lin Feng
AU - Totir, Dana
AU - Chottiner, Gary S.
AU - Scherson, Daniel Alberto
PY - 1998/10/8
Y1 - 1998/10/8
N2 - 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.
AB - 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.
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M3 - Article
AN - SCOPUS:0141931935
VL - 102
SP - 8013
EP - 8016
JO - Journal of Physical Chemistry B Materials
JF - Journal of Physical Chemistry B Materials
SN - 1520-6106
IS - 41
ER -