Ti atoms in Ru0.3Ti0.7O2 mixed oxides form active and selective sites for electrochemical chlorine evolution
2014 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 0019-4686, Vol. 146, 733-740 p.Article in journal (Refereed) Published
The electrocatalytic properties of the (1 1 0) surface of Ru-doped TiO2, Ti-doped RuO2 and the industrially important Dimensionally Stable Anode (DSA) composition Ru0.3Ti0.7O2 have been examined using density functional theory. It is found that the oxygen adsorption energy on a Ti site is strongly affected by the presence of small amounts of Ru dopant, whereas oxygen adsorption is relatively unaffected by Ti dopants in RuO2. The calculations also indicate that coordinatively unsaturated Ti sites on Ru-doped TiO2 and on Ru0.3Ti0.7O2 could form active and selective sites for Cl-2 evolution. These results suggest a reason for why DSA shows a higher chlorine selectivity than RuO2 and propose an experimental test of the hypothesis.
Place, publisher, year, edition, pages
2014. Vol. 146, 733-740 p.
Dimensionally stable anodes, Electrolysis, Oxygen, Chlorine, Selectivity, Density functional theory
IdentifiersURN: urn:nbn:se:kth:diva-158826DOI: 10.1016/j.electacta.2014.09.056ISI: 000345226100091ScopusID: 2-s2.0-84908504059OAI: oai:DiVA.org:kth-158826DiVA: diva2:783592
FunderSwedish Energy Agency
QC 201501262015-01-262015-01-122015-11-19Bibliographically approved