Structure and electrochemical reactivity of oxide nanolayers on metal and alloy surfaces

Phillipe Marcus 

Ecole Nationale Supérieure de chimie de Paris (ENSCP), 11 rue P. et M. Curie, Paris 75005, France

Abstract

Oxide layers on metal and alloy surfaces play a role in various areas including corrosion protection, electrocatalysis, energy conversion and storage. They often exist under conditions that are not equililibrium conditions, but rather stationary or even non stationary conditions.

Their electrochemical reactivity is a key factor, and it is largely governed by their nanostructure.

In this lecture, the following aspects will be addressed :

- mechanisms of growth of oxide nanolayers on metals and alloys under controlled electrochemical potential

- nanostructure of oxide nanolayers under stationary conditions

- oxide surface/electrolyte interface : electrochemical reactivity at the atomic scale.

The materials selected to illustrate the above aspects are Cu2O/Cu, NiO/Ni, Cr2O3/Cr and stainless steels, V2O5/V.

The experimental techniques used for surface imaging and spectroscopy are : scanning tunnelling microscopy (STM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS).

 

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Presentation: Invited at E-MRS Fall Meeting 2007, Symposium D, by Phillipe Marcus
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-21 11:56
Revised:   2009-06-07 00:44