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In situ modification of a Pt catalyst supported on a mixed ionic-electronic conducting membrane

Lookup NU author(s): Dr Danai Poulidi, Professor Ian Metcalfe


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The electrochemical promotion of a platinum catalyst for ethylene oxidation on a dual chamber membrane reactor was studied. The catalyst was supported on a La0.6Sr0.4Co0.2Fe0.803 membrane. Due the supporting membrane's electronic conductivity it is possible to promote the reaction by controlling the oxygen chemical potential difference across the membrane. Upon establishment of an oxygen potential difference across the membrane, oxygen species can migrate and spillover onto the catalyst surface, modifying the catalytic activity. Initial experiments showed an overall promotion of approximately one order of magnitude of the reaction rate of ethylene, under an oxygen atmosphere on the sweep side of the membrane reactor, as compared with the rate under an inert sweep gas. The reaction rate can keep its promoted state even after the flow of oxygen on the sweep side was interrupted. This behavior caused further promotion with every experiment cycle. The causes of permanent promotion and on demonstrating controllable promotion of the catalytic activity are presented. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

Publication metadata

Author(s): Poulidi D, Metcalfe IS

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: AIChE Annual Meeting

Year of Conference: 2006

Pages: 1pp

Library holdings: Search Newcastle University Library for this item

ISBN: 9780816910120