首页|Rational construction of core-branch Co3O4@CoNi-layered double hydroxide nanoarrays as efficient electrocatalysts for oxygen evolution reaction
Rational construction of core-branch Co3O4@CoNi-layered double hydroxide nanoarrays as efficient electrocatalysts for oxygen evolution reaction
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NSTL
Elsevier
Electrocatalytic water oxidation is a crucial process for many conversion and storage systems. Developing noble-metal-free oxygen evolution reaction (OER) electrocatalysts with high activity and long durability thus becomes immensely vital yet challenging. In this work, core-branch Co3O4 @CoNi-layered double hydroxide nanoarrays are developed on nickel foam with the assistance of metal-organic-frameworks template and atomic layer deposition technology, acting as active and durable electrocatalysts for OER. The introduction of CoNi-LDH significantly regulates the morphological and electronic structure of Co3O4, giving rise to high surface-active sites exposure, accelerated electron transfer, and optimal interaction with intermediate products. Together with the 3D self-supported and binder-free structure, the optimized Co3O4@CoNi-LDH/NF exhibits remarkable OER performances in terms of low overpotential, high OER current density, and low Tafel slope, which are even better than the benchmark IrO2 electrocatalyst. This study provides a new horizon for exploring biphasic core-branch materials for electrocatalysis and other energy-related applications.
Tian Y.、Li S.、Huang R.、Wei Z.、Liu P.、Jing Q.、Ji X.、Li Y.
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College of Chemistry and Chemical Engineering Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan Xinyang Normal University
School of Materials and Chemical Technology Tokyo Institute of Technology
Institute of Materials Research and Engineering Agency for Science Technology and Research (A?STAR)
NSTL
Elsevier
