Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-36019

Hofmann, J P; Zweidinger, S; Knapp, M; Seitsonen, A P; Schulte, K; Andersen, J N; Lundgren, E; Over, H (2010). Hydrogen-Promoted Chlorination of RuO2(110). Journal of Physical Chemistry C, 114(24):10901-10909.

[img] PDF - Registered users only
3MB

View at publisher
[img]
Preview
Accepted Version
PDF
3MB

Abstract

High-resolution core-level photoemission spectroscopy and temperature-programmed reaction experiments together with density functional theory calculations were used to elucidate on the atomic scale the chlorination mechanism of ruthenium dioxide RuO2(110) by hydrogen chloride exposure. The surface-selective chlorination accounts for the extraordinary stability of the RuO2 catalyst in the Sumitomo process ? the heterogeneously catalyzed oxidation of hydrogen chloride by oxygen. The selective replacement of bridging oxygen atoms by chlorine atoms depends on the formation of water molecules serving as leaving groups. Water is produced by the chlorine-assisted recombination of two neighboring surface hydroxyl groups at around 450 K, a temperature where water instantaneously leaves the surface. Finally, the bridging vacancy is rapidly filled in by chlorine atoms, thereby forming bridging chlorine atoms. Preadsorbed hydrogen has shown to facilitate the chlorination process for stoichiometry reasons. The general strategy of transforming bridging O atoms into a good leaving group has been corroborated by the chlorination of RuO2(110) via CO pretreatment with CO2 as the leaving group and subsequent Cl2 exposure.

Citations

16 citations in Web of Science®
16 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

26 downloads since deposited on 23 Dec 2010
11 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
DDC:540 Chemistry
Language:English
Date:2 June 2010
Deposited On:23 Dec 2010 12:29
Last Modified:05 Jun 2014 13:49
Publisher:American Chemical Society
ISSN:1932-7447
Additional Information:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/jp103199x.
Publisher DOI:10.1021/jp103199x

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page