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LDH-assisted growth of FeCo bimetal-MOF nanorods for electrocatalytic oxygen evolution† † Electronic supplementary information (ESI) available. See https://doi.org/10.1039/d2ra04871j

ABSTRACT: Metal–organic frameworks (MOFs) have emerged as alternative OER catalysts due to their easy regulation, such as in situ self-reconstruction from MOFs to metal hydroxides through alkaline hydrolysis. Herein, we demonstrate a facile strategy for the in situ transformation of FeCo layered double hydroxide (FeCo-LDH) nanosheets into 1D spindle-shaped FeCo-MOFs for efficient OER. An optimized electrode of FeCo-MOF on a nickel foam (NF) was achieved by adjusting the addition of organic ligands and the reaction time in the hydrothermal reaction. Based on the unique 1D nanostructure and the cation regulation, the obtained FeCo-MOF exhibits a good catalytic performance toward the OER with a low overpotential of 475 mV at 100 mA cm−2, a small Tafel slope of 121.8 mV dec−1, and high long-term durability. This study provides a facile strategy for preparing bimetal-MOFs as catalysts for efficient OER. We demonstrate a strategy for transforming FeCo-LDH nanosheets into 1D FeCo-MOF nanorods in situ for efficient OER. This strategy solves the problem that MOFs are difficult to grow on conductive substrates under traditional synthesis conditions.

SUBMITTER: Tang L

PROVIDER: S-EPMC9443477 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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