Ascorbate acts as a reversible electron shuttle between tris(2-carboxyethyl) phosphine (TCEP) and ReI or RuII photosensitizers. Oxidized ascorbate is recycled up to 50 times by the TCEP → TCEP![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
O redox process which enables 30 000 TONs per WRC in photocatalytic hydrogen production, thus exceeding the performance with pure ascorbate by far.
C. Bachmann, B. Probst, M. Guttentag and R. Alberto, Chem. Commun., 2014, 50, 6737 DOI: 10.1039/C4CC01500B
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