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- W4296682836 abstract "Breakthroughs in the design of robust bifunctional oxygen reduction/evolution reaction (ORR/OER) catalysts could put Zn-air batteries (ZABs) performance to the summit, but remain full of challenges. In this work, the MnS phase was deliberately introduced into the Mott-Schottky Co/Co 9 S 8 for engineering a three-phases Co/Co 9 S 8 /MnS heterojunction on defect-rich N-doped mesoporous carbon substrate (Co/Co 9 S 8 /MnS-NMC). It affords abundant three-phases heterostructure interfaces that effectively accelerate the electron transfer and trigger further electronic structure reconfiguration, thus advancing the bifunctional ORR/OER activities. Benefiting from these structures, the Co/Co 9 S 8 /MnS-NMC possesses a half-wave potential of 0.84 V toward ORR and a low overpotential of 330 mV toward OER at a current density of 10 mA cm -2 , catching up with those of commercial Pt/C and RuO 2 catalysts. It also endows the ZABs with a good power density, round-trip efficiency and robust stability over 750 h, showcasing the promising potential in practical applications. This work not only provides a facile strategy to construct the three-phases heterojunction catalysts, but also sheds light on developing the efficient and robust nonprecious metal-based bifunctional ORR/OER catalysts. • The Co/Co 9 S 8 /MnS-NMC with three-phase heterojunction were constructed. • It provided abundant heterogeneous interfaces for accelerating the electron transfer and achieving the further electronic structure reconfiguration. • The advanced bifunctional ORR/OER activities and stability were achieved. • The Co/Co 9 S 8 /MnS-NMC-based ZABs affords a superior power density, a good round-trip efficiency and robust stability over 750 h." @default.
- W4296682836 created "2022-09-23" @default.
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- W4296682836 date "2022-12-01" @default.
- W4296682836 modified "2023-10-17" @default.
- W4296682836 title "Three-phases Co/Co9S8/MnS heterostructures engineering for boosted ORR/OER activities in Zn–air batteries" @default.
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- W4296682836 doi "https://doi.org/10.1016/j.mtener.2022.101150" @default.
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