Density functional theory studies of acid catalysis & electrocatalysis

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

Abstract

The molecular pathways of the catalytic reactions within the direct methanol fuel cell are studied. A realistic model of the electrocatalytic system, in which both the solution phase and an applied potential are included, is used to aid in the design of effective materials for methanol oxidation and oxygen reduction. Polyoxometalates, or heteropolyacids (HPA), are active in reactions requiring a strong acid catalyst, such as the skeletal isomerization of hydrocarbons and the alkylation of isobutane with butenes, and are a potential replacement for the corrosive, toxic liquid acids currently used. Density functional theory (DFT) is used to study the energetics of proposed deactivation mechanisms. Reaction energies and activation barriers are determined by DFT and further used to establish reaction rates and equilibrium constants to clarify whether a proposed mechanism may explain the deactivation process. Emphasis is placed on understanding how including water in the reaction environment may slow or prevent deactivation. This research also seeks to further understanding of acid-catalysis mechanisms over HPA by providing insight into the requirements of an effective solid-acid catalyst for the alkylation of isobutane with n-butene. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).

Original languageEnglish (US)
Title of host publication05AIChE
Subtitle of host publication2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings
PublisherAmerican Institute of Chemical Engineers
ISBN (Print)0816909962, 9780816909964
StatePublished - Jan 1 2005
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Publication series

NameAIChE Annual Meeting Conference Proceedings
Volume2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
CountryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

All Science Journal Classification (ASJC) codes

  • Energy(all)

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  • Cite this

    Janik, M. J. (2005). Density functional theory studies of acid catalysis & electrocatalysis. In 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase, Conference Proceedings (AIChE Annual Meeting Conference Proceedings; Vol. 2005). American Institute of Chemical Engineers.