Catalytic consequences of composition in polyoxometalate clusters with keggin structure

Josef Macht, Michael J. Janik, Matthew Neurock, Enrique Iglesia

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

(Graph Presented) Rate constants for acid-catalyzed butanol dehydration on Keggin-type polyoxometalate clusters H8-nXn+W 12O40 (X=P, Si, Al, Co) increase as the oxidation state of the central atom increases and the number of cluster protons concurrently decreases (see diagram). These trends reflect the lower deprotonation enthalpies of clusters with high valent central atoms and their stability as the anionic conjugate base in ionic transition states involved in dehydration catalysis.

Original languageEnglish (US)
Pages (from-to)7864-7868
Number of pages5
JournalAngewandte Chemie - International Edition
Volume46
Issue number41
DOIs
StatePublished - Oct 26 2007

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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