Metal Ion Substitution in a Pentanuclear Scaffold Provides an Efficient Catalyst for a HCOOH/CO2 Cycle

Here, we report that metal ion substitution in a pentanuclear scaffold provides an efficient catalyst for a photocatalytic HCOOH/CO2 cycle. A pentanuclear copper complex (Cu5) served as a catalyst that drives both photochemical formic acid production and formic acid dehydrogenation under ambient conditions with high activity and selectivity.