TY - JOUR
T1 - Cyanide-modified Pt(111)
T2 - Structure, stability and hydrogen adsorption
AU - Escudero-Escribano, Maria
AU - Soldano, German J.
AU - Quaino, Paola
AU - Zoloff Michoff, Martin E.
AU - Leiva, Ezequiel P. M.
AU - Schmickler, Wolfgang
AU - Cuesta, Angel
PY - 2012
Y1 - 2012
N2 - Cyanide-modified Pt(1 1 1) surfaces have been recently used to study atomic-ensemble effects in electrocatalysis. These studies have been based on the assumption that cyanide acts as a third body, blocking some surface sites but leaving the electronic properties of the surrounding ones unaltered, although this is in apparent contradiction with the observation of a positive shift of 0.2 V in the onset of hydrogen adsorption on cyanide-modified Pt(1 1 1) electrodes, as compared with clean Pt(1 1 1). We have performed theoretical calculations in order to provide support to this assumption and explain the positive shift in the onset of hydrogen adsorption, which is shown to be due to the formation of CNHad.
AB - Cyanide-modified Pt(1 1 1) surfaces have been recently used to study atomic-ensemble effects in electrocatalysis. These studies have been based on the assumption that cyanide acts as a third body, blocking some surface sites but leaving the electronic properties of the surrounding ones unaltered, although this is in apparent contradiction with the observation of a positive shift of 0.2 V in the onset of hydrogen adsorption on cyanide-modified Pt(1 1 1) electrodes, as compared with clean Pt(1 1 1). We have performed theoretical calculations in order to provide support to this assumption and explain the positive shift in the onset of hydrogen adsorption, which is shown to be due to the formation of CNHad.
U2 - 10.1016/j.electacta.2012.02.062
DO - 10.1016/j.electacta.2012.02.062
M3 - Journal article
VL - 82
SP - 524
EP - 533
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -