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

Danai Poulidi*, Ian S. Metcalfe

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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).

Original languageEnglish
Title of host publicationAIChE Annual Meeting, Conference Proceedings
Publication statusPublished - 2006
Event2006 AIChE Annual Meeting - San Francisco, CA, United States
Duration: 12 Nov 200617 Nov 2006


Conference2006 AIChE Annual Meeting
Country/TerritoryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Bioengineering
  • Safety, Risk, Reliability and Quality


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