Progress and challenges in polyoxometalate-based catalysis and catalytic materials chemistry

• Published in: Journal of molecular catalysis. A, Chemical Vol. 262; no. 1; pp. 2 - 6
• Main Author: Hill, Craig L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2007
• Subjects: Catalysis challenges; Ion pairing; Multiple reactive isomers; Structure-reactivity correlations; Ion pairing; Catalysis challenges; Multiple reactive isomers; Structure-reactivity correlations
• ISSN: 1381-1169; 1873-314X
• DOI: 10.1016/j.molcata.2006.08.042

Classic challenges in polyoxometalate-based catalytic processes include quantifying the role of ion pairing on turnover rates, selectivity and system stability, knowing the actual reacting units, and systematically controlling competing processes. The impact of early transition-metal oxygen-anion cluster (polyoxometalate or “POM”) geometric and electronic structural properties on POM-based catalysis is addressed. Three specific areas of general challenge in POM-based catalysis and catalytic materials are elaborated: (1) the role of ion pairing in catalyst stability, selectivity, and reactivity; (2) the presence of multiple reactive forms of the POMs and the interconvertability of these forms under turnover conditions; and (3) the impact of POM ground state and excited state electronic structure on turnover and selectivity.