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• W3128329355 abstract "This work provides a new synthetic conception for the synergistic effect of ZIF and LDH on the construction of unique hollow nanoarrays, simultaneously proposes a feasible means for designing dual-functional catalysts for efficient overall water splitting. • Ordered self-supported CuO@CoZn-LDH nanoarrays have been successfully prepared. • The hollow structure with defect-rich pores facilitates electrocatalytic. • The CuO@CoZn-LDH exhibits outstanding electrocatalytic activity and stability. Driving the electrochemical water splitting is considered as a green and sustainable method to produce hydrogen energy. Herein, a novel strategy to fabricate the dual-metal zeolitic imidazolate framework (CoZn-ZIF) nanocrystals on Cu(OH) 2 nanowires supported by Cu foam (CF) as a precursor to change the conventional LDH growth has been proposed. It can obtain highly ordered hollow CuO@CoZn-LDH nanoarrays with defect-rich porous surface for efficient overall water splitting. Specifically, the appropriate adjustment of Co/Zn metal ratios in the ZIF precursor could lead to a well-defined morphology to create the defect-rich porous surface, which exposes more active sites and the accessibility of electrolyte to promote the electrocatalytic efficiency. The obtained hollow CuO@CoZn-LDH/CF nanoarrays catalyst exhibits an excellent activity in alkaline media with the low overpotentials of 194 mV and 124 mV at the current density of 10 mA cm −2 for OER and HER, respectively. Remarkably, as bifunctional electrodes for overall water splitting, it displays an alkali-electrolyzer with a low cell voltage of 1.55 V at the current density of 10 mA cm −2 , and can be comparable to commercial the IrO 2 @CF||Pt/C@CF couple catalyst. The work provides a new prospect for the rational design and fabrication of advanced hierarchical multifunctional electrocatalysts in electrochemical energy device application." @default.
• W3128329355 created "2021-02-15" @default.
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• W3128329355 date "2021-06-01" @default.
• W3128329355 modified "2023-10-17" @default.
• W3128329355 title "In-situ transformation obtained defect-rich porous hollow CuO@CoZn-LDH nanoarrays as self-supported electrode for highly efficient overall water splitting" @default.
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• W3128329355 doi "https://doi.org/10.1016/j.cej.2021.128809" @default.
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