Herein, based on the strategy of synergetic catalysis, we report a cobalt-based coordination polymer PEI-Co. As a heterogeneous catalyst, PEI-Co shows a selectivity of 95% and a yield of 1170 mmol g for visible-light-driven CO-to-CO conversion in a water containing system, which is almost 2.8 times that of the mononuclear cobalt catalyst CoL and is comparable to that of the dinuclear cobalt catalyst CoL.
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