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- W4289687537 abstract "Developing low-cost and high-efficiency bifunctional catalysts for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is critical to expedite the widespread implementation of rechargeable zinc-air batteries. Herein, a unique Mg-decorated three-dimensionally ordered mesoporous (3DOM) Co3O4 electrocatalyst is engineered and evaluated as cathodic material for zinc-air batteries. The modulation of electronic structure and bonding configuration of Co sites through coordination with substituted Mg atoms effectively enhance the interaction with oxygen species and, therefore, the ORR/OER activity. Meanwhile, the substitution of Co2+ with Mg2+ creates abundant, more catalytically active octahedral sites (Co3+) in 3DOM-MgxCo3−xO4. Moreover, the tailored 3D interpenetrating porous structure endows the electrocatalyst with large diffusion channels for oxygen species and highly accessible active sites. The as-prepared catalyst retains 99% and 98% of its initial ORR and OER current, respectively, after 16 h under chronoamperometric measurement. The zinc-air battery assembled with 3DOM-MgxCo3−xO4 exhibits a high power density of 253 mW cm−2 and long-term cyclability over 236 h, outperforming the commercial noble-metal based catalysts in terms of performance and stability. This work offers a straightforward and promising design strategy for development of robust bifunctional electrocatalysts toward practical applications of zinc-air batteries." @default.
- W4289687537 created "2022-08-04" @default.
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- W4289687537 date "2022-09-01" @default.
- W4289687537 modified "2023-10-11" @default.
- W4289687537 title "Three-dimensionally ordered mesoporous Co3O4 decorated with Mg as bifunctional oxygen electrocatalysts for high-performance zinc-air batteries" @default.
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- W4289687537 doi "https://doi.org/10.1016/j.nanoen.2022.107425" @default.
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