Regulating the Electronic Structure of Metal–Organic Frameworks by Introducing Mn for Enhanced Oxygen Evolution Activity

The construction of low-cost and highly efficient oxygen evolution electrocatalysts is paramount for clean and sustainable hydrogen energy. In recent years, metal–organic framework (MOF) OER electrocatalysts have attracted tremendous research attention. Herein, we report a simple and facile strategy to construct bimetallic MOFs (named CoMn0.01) for enhancing OER catalytic performance. Significantly, CoMn0.01 exhibited remarkable OER activity (255 mV at 10 mA cm–2) and a low Tafel slope of 66 mV dec–1, superior to those of commercial benchmark electrocatalysts (RuO2, 352 mV, 178 mV dec–1). Besides, the catalyst demonstrated outstanding longevity for 144 h at a current density of 100 mA cm –2. Mn doping can regulate the electronic structure of Co MOFs, which optimizes charge transfer capability and improves conductivity.