Base-free production of H2 by dehydrogenation of formic acid using an iridium-bisMETAMORPhos complex.

Erase the base: An iridium complex based on a cooperative ligand that functions as an internal base is reported. This complex can rapidly and cleanly dehydrogenate formic acid in absence of external base, a reaction that is required if formic acid is to be exploited as an energy carrier (see scheme).

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