INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Recent advances in the theory and simulation of Underpotential Deposition
Autor/es:
L. FARIGLIANO, O.A. PINTO, P. VELEZ, L. REINAUDI, M. VILLARREAL, O. A. OVIEDO , AND E. P. M. LEIVA.
Reunión:
Conferencia; ECS 224th Meeting; 2013
Resumen:
The electrochemical formation of non-bulk
surface (sub)monolayers at potentials more positive than
the reversible Nernst potential for the bulk deposition of
the adsorbate, popularly denominated underpotential
deposition (upd), has been observed with a great variety
of substrate/adsorbate combinations, including
nanoparticles(NPs). The latter have awaked great interest
in both the scientific and technological communities, and
the size-dependence of their thermodynamic properties
has been a hot topic of research in recent years[1].
In the present talk we will address three different
aspects of upd:
1- We will consider upd on surfaces with
different curvatures, and we will show that
in the case of surfaces with positive
curvatures(NPs) the upd phenomenon
should vanish in the nanoscale.
2- We will show how to deal with upd
modeling in the presence of anions, and
show that in some systems the presence of
anions may be essential for the existence of
upd.
3- We will analyze how to calculate the
entropic contribution to the stability of upd
deposits.