Pore-edge graphitic nitride-dominant hierarchically porous carbons for boosting oxygen reduction catalysis

Liu, Lilai; Wu, Youzheng; Wang, Hui; Yang, Xueying; Zhu, Weirun; Ma, Shuanshuan; Lu, Xiangyu; Li, Yaqiang; Ren, Penghui; Yang, Peixia; Li, Ruopeng

doi:10.1039/d4se00135d

Cited by 2 publications

(1 citation statement)

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“…In order to achieve carbon neutrality goals and accelerate the development of an environment-friendly society, the next generation of clean energy devices, including Zn–air batteries (ZABs), has garnered significant attention because of low pollution features. 1–12 However, the actual performance of ZABs is limited by the slow ORR kinetics. 13–19 As benchmark catalysts for the ORR, Pt-based catalysts are costly and prone to instability, making them unsuitable for widespread commercial applications.…”

Section: Introductionmentioning

confidence: 99%

Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

Xu,

Gao,

et al. 2024

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

Xu,

Gao,

et al. 2024

Sustainable Energy Fuels

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Power Production and Degradation of Pesticide Wastewater Through Microbial Fuel Cells with the Modified Activated Carbon Air Cathode by Hollow-Carbon and Carbon-Encapsulated Structures

Zhang,

Jia,

Liu

et al. 2024

Molecules

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Microbial fuel cell (MFC) can degrade pesticide wastewater and recovery energy simultaneously, and the activated carbon (AC) air cathode has great prospects for practical application. However, insufficient active sites and the limitation of multi-step electron transfer for oxygen reduction reaction (ORR) requires that AC should be modified by highly efficient electrocatalysts. Herein, busing the confinement effect of carbon-encapsulated metal and hollow carbon, we designed a unique ORR catalyst of Fe-Fe3O4-NC through utilizing the 2D leaf-like nanoplates of Zn-ZIF-L to load Prussian blue (PB) particles. The volatilization of low-boiled Zn and the catalysis of iron compounds led to the formation of confined walls of hollow carbon shell and carbon-encapsulated Fe/Fe3O4 particles on N-doped carbon substrate. Multivalent iron, a large surface area (368.11 m2·g−1), N doping, a heterojunction interface, and the confinement effect provided all the Fe-Fe3O4-NC-modified AC air cathodes with excellent ORR activity. The optimal samples of AC-Fe-Fe3O4-NC-3 achieved a peak power density of 1213.8 mW·m−2, demonstrating a substantial 82.8% increase over that of the bare AC. Furthermore, its efficiency in glyphosate removal reached 80.1%, surpassing the 23.2% of the bare AC. This study offers new ideas in constructing composite confined structures and the as-designed Fe-Fe3O4-NC is a promising modification candidate for the commercial adoption of AC air cathodes.

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Pore-edge graphitic nitride-dominant hierarchically porous carbons for boosting oxygen reduction catalysis

Abstract: The construction of pore structures at different scales (atomic defect and molecular porous structures) is the most promising means to obtain excellent ORR catalytic activity of carbon-based catalysts. As a...

Cited by 2 publications

References 52 publications

Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

Power Production and Degradation of Pesticide Wastewater Through Microbial Fuel Cells with the Modified Activated Carbon Air Cathode by Hollow-Carbon and Carbon-Encapsulated Structures

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