Isostructural MOFs with Higher Proton Conductivity for Improved Oxygen Evolution Reaction Performance

Here we synthesized two new isostructural MOFs (FJU-82-Co/FJU-82-Zn) and first observed that tuning of the proton conductivity may provide an effective strategy to improve the electrocatalytic OER perfomances of isostructural crystalline MOF materials. The conductivity value for FJU-82-Co is 7.40 × 10–5 S cm–1, which is 127-fold that for FJU-82-Zn with 5.80 × 10–7 S cm–1 at 60 °C and 98% RH, while the overpotential of FJU-82-Co is 0.57 V at 1 mA cm–2, which is better than that of FJU-82-Zn with 1.17 V.