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A first attempt to use cobalt corrins (B12) as homogeneous catalysts for photoreduction of CO2 to CO and formic acid demonstrates that the corrins act as catalysts for this process and that they are much more efficient than cobalt porphyrins.
Grodkowski, J.
and Neta, P.
(2000),
Cobalt-Corrin Catalyzed Photoreduction of CO<sub>2</sub>, Journal of Physical Chemistry A
(Accessed October 11, 2025)