Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 43, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202103318
Keywords
electrocatalysis; FeNi; layered double hydroxides; metal-organic frameworks; nanosheets; oxygen evolution reaction
Categories
Funding
- National Natural Science Foundation of China [22002026]
- Natural Science Foundation of Guangxi Province [2019GXNSFGA245003]
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A facile strategy was proposed to fabricate 2D FeNi layered double hydroxide nanosheets packed with 1D sword-like FeNi-MOFs using FeNi-LDH as a semi-sacrificial template. The composite exhibited enhanced OER electrocatalytic performance due to its unique 2D/1D combined structure, with low overpotential, small Tafel slope, and high long-term durability, providing a new way to fabricate advanced catalysts for electrochemical energy conversion.
Water oxidation is a critical process for electrochemical water splitting due to its inherent sluggish kinetics. In spite of the high catalytic activities of noble metal-based electrocatalysts for water oxidation, their high cost, rare reserves, and low stabilities drive researchers to exploit efficient but low-cost electrocatalysts. Ultrathin 2D nanomaterials are considered efficient electrocatalysts for oxygen evolution reaction (OER) in water splitting. Herein, a facile strategy is proposed to fabricate 2D FeNi layered double hydroxide (FeNi-LDH) nanosheets packed with the in situ produced 1D sword-like FeNi-MOFs by using FeNi-LDH as a semi-sacrificial template. In the composite, the thickness of the formed nanosheets is only 1.34 nm, much thinner than that of most previously reported 2D materials. The 1D porous sword-like MOF nanorods have a long length of around 1.3 mu m. Due to the unique 2D/1D combined structure, the as-prepared FeNi LDH/MOF is directly used as electrocatalyst for the OER displays enhanced OER electrocatalytic performance with a low overpotential of 272 mV@100 mA cm(-2), a small Tafel slope of 34.1 mV dec(-1), high long-term durability. This work provides a new way to fabricate integrated ultrathin 2D nanosheets and MOFs as advanced catalysts for electrochemical energy conversion.
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