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• W4387426458 startingPage "146502" @default.
• W4387426458 abstract "Constructing high-efficient and cost-effective electrocatalyst with oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) for the development of zinc-air flow batteries (ZAFBs) and overall water splitting (OWS) is significant, but still challenging. Herein, we have fabricated a heterojunction catalyst (Fe,CoZn9+9-NO/WC) featuring uniformly dispersed Fe and Co coordinated with riched-nitrogen/oxygen codoped into three-dimensional highly porous tungsten–carbon matrix modified carbon nanotube by a simple stepwise construction route using water as the solvent. The resultant Fe,CoZn9+9-NO/WC exhibits a positive half-wave potential (E1/2) of 0.889 V for ORR, a low overpotential at 10 mA·cm−2 for OER (290 mV) and HER (84 mV), and excellent electrochemical durability in alkaline electrolyte, outperforming even benchmark catalysts. The superior and robust ORR/OER/HER trifunctional electrocatalytic performance of Fe,CoZn9+9-NO/WC can be accredited to the synergistic effects of highly exposed Fe,Co-N/Ox and Fe/Co nanoparticle active species, tungsten–carbon structures, optimized electronic structural, self-derived carbon nanotubes and abundant hierarchical porous interfaces. Furthermore, Fe,CoZn9+9-NO/WC as a bifunctional air cathode for ZAFBs delivers higher open circuit voltage, peak power density (190 mW·cm−2) and specific capacity (814 mAh·g−1), lower charge/discharge voltage gap and prolonged operational cycles durability, largely exceeding those of the hybrid Pt/C + RuO2 bifunctional catalyst. The alkaline OWS electrolyzer constructed by Fe,CoZn9+9-NO/WC with good stability and requires only 1.556 V cell voltage at 10 mA·cm−2. Impressively, the self-constructed Fe,CoZn9+9-NO/WC electrodes were applied to practical ZAFBs and OWS devices, demonstrating superior performance to the recently reported ZIFs/MOF-derived catalysts in organic solvents. This work offers an economical synthetic strategy to prepare highly efficient multifunctional catalysts with practical potential for commercial production, promising to facilitate the development of clean energy storage and conversion devices." @default.
• W4387426458 created "2023-10-08" @default.
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• W4387426458 date "2023-10-01" @default.
• W4387426458 modified "2023-10-18" @default.
• W4387426458 title "ZIF-derived Fe,Co coordinated N/O-codoped three-dimensional tungsten–carbon matrix for the performance-enhanced zinc-air flow battery and water splitting" @default.
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• W4387426458 doi "https://doi.org/10.1016/j.cej.2023.146502" @default.
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