Excess Electrons Stabilized on Ionic Oxide Surfaces

Chiesa, Mario, Paganini, Maria Cristina, Giamello, Elio, Murphy, Damien Martin ORCID: https://orcid.org/0000-0002-5941-4879, Di Valentin, Cristiana and Pacchioni, Gianfranco 2006. Excess Electrons Stabilized on Ionic Oxide Surfaces. Accounts of Chemical Research 39 (11) , pp. 861-867. 10.1021/ar068144r

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Abstract

Surface excess electrons are remarkable chemical entities that provide great opportunities for the design of new materials with precisely tuned electronic and magnetic properties. In this Account, we describe the structure and electronic properties of excess electron centers generated at the surface of insulating oxides. We also outline the elementary mechanisms that are at the basis of the generation of excess electrons at solid surfaces, setting a comparison to the general problem of excess electron localization in condensed media. Emphasis is given to morphological aspects relative to the surface-trapping sites as deduced from combined electron paramagnetic resonance and accurate quantum chemical calculations. The remarkable reactivity featured by the so formed “electron-rich” surfaces is illustrated, describing the reduction of simple diatomic molecules that form adsorbed radical anions via direct surface to adsorbate electron transfer.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Subjects:	Q Science > QD Chemistry
Publisher:	American Chemical Society
ISSN:	0001-4842
Last Modified:	18 Oct 2022 13:12
URI:	https://orca.cardiff.ac.uk/id/eprint/12989

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