Regulating the electronic structure of metal-organic frameworks via ion-exchanged Ir dispersion for robust overall water splitting.

A facile ion exchange strategy to fabricate CoIr x -BDC with atomically dispersed Ir is developed towards overall water splitting. The optimized CoIr 3 -BDC requires only 12 and 81 mV to deliver 10 and 100 mA cm -2 alkaline HER, respectively, and only 245 mV to reach 100 mA cm -2 alkaline OER.