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 x 10(-5) S cm(-1), which is 127-fold that for FJU-82-Zn with 5.80 x 10(-7) S cm(-1) at 60 degrees 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.