Defective metal-organic framework derivative by room-temperature exfoliation and reduction for highly efficient oxygen evolution reaction
Metal-organic frameworks (MOFs) have been considered as an attractive precursor to fabricate functional MOFs derivatives for oxygen evolution reactions (OER). Herein, we developed a simple room-temperature exfoliation and reduction strategy to construct a core-shell structure electrocatalyst derived from multi-layer MOFs precursor for an enhanced OER performance. The reduced MOFs behaved stable OER current with an overpotential as low as 253 mV at 10 mA cm−2 and a Tafel slop of 39 mV dec-1, and the TOF increased by 38 times than pristine MOFs. The significant boosting is attributed to the amorphous core-shell structure for more active sites and the inner sufficient defects to enhance the conductivity by NaBH4 reduction under the ambient condition.