Construction of Bimetallic Co/Fe-Incorporated PTA/FDA Nanoclusters for Boosting Electrocatalytic Oxygen Evolution

Summary. Electrochemical water decomposition as a crucial approach for the gradual growth of renewable energy has attracted extensive attention. Metal-organic frameworks (MOFs) which benefit from ultra-high specific surface area, controllable nanostructures, and excellent porosity have been widely used high activity catalyst by electrochemical means. Herein, composition morphology metal–organic framework nanoclusters with bimetallic Co/Fe-incorporated PTA/FDA is designed efficient durable OER electrocatalysts, including CoFe-BTC/PTA, CoFe-BTC/FDA, CoFe-PTA/FDA. The crystal structure MOF materials composed alternating organic hydrocarbon BTC, PTA, or FDA inorganic metal oxide layer. Co Fe interact central atoms, joining ligands to form highly symmetric structure. electronic structures active sites various metals are different, insertion iron atoms plays certain role in regulation their structures. CoFe-PTA/FDA shows significant overpotential η 10 = 295 mV (1.525 V vs. RHE) reached 10 mA cm-2, 62.85 mV dec-1 Tafel slope pretty conspicuous stability (72 hours continuous testing). DFT calculation results show coordination unsaturated atom primary center these electrocatalytic reaction, coupling effect caused adding key adjust activity.