Journal
JOURNAL OF COORDINATION CHEMISTRY
Volume 63, Issue 14-16, Pages 2685-2694Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2010.492470
Keywords
Hydrogen storage; Formic acid decomposition; Homogeneous catalysis; Water-soluble sulfonato phosphines; Ruthenium
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Funding
- Swiss National Science Foundation
- EPFL
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Hydrogen can be generated from formic acid in aqueous phase homogeneous catalytic reactions using ruthenium catalysts with water-soluble phosphine ligands. A comparison of tri-, di-, and mono-sulfonato triphenylphosphine, disulfonato diphenyl-alkyl-phosphines (Ph2PR; R Me, n-Bu, Cyp), and monosulfonato phenyl-dialkyl-phosphines (PhPR2; R Me, Cyp) is described. Using two equivalents of water-soluble phosphine per ruthenium ion, significant turnover frequencies are observed for the decomposition of formic acid. The influence of basicity, water solubility (related to the structures and behavior in aqueous solution), electronic properties, and steric effects of the phosphines on the rate of the hydrogen generation are investigated.
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