Photochemical hydrogen production from ascorbic acid catalysed by tris(2, 2′-bipyridyl)ruthenium(II) and hydridotris(triethylphosphine)palladium(II)
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 5,p. 809-813
- https://doi.org/10.1039/dt9840000809
Abstract
Hydrogen is produced catalytically, over a limited period of time, on photolysis of aqueous solutions containing [PdH(PEt3)3]+, [Ru(bipy)3]2+(bipy = 2,2′-bipyridyl), and ascorbic acid. Kinetic studies suggest a rate-determining electron transfer from photochemically produced [Ru(bipy)3]+ to [PdH(PEt3)3]+ to give a palladium(I) radical from which hydrogen is rapidly produced. Termination of the hydrogen-producing reaction is shown to occur because [PdH(PEt3)3]˙ is oxidised by product dehydroascorbic acid in a competing reaction to H2 production, and because of substantial bleaching of the [Ru(bipy)3]2+.Keywords
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