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• W4384408518 abstract "Structural strengths of carbon-based supports, which hold up catalytically active sites and electron transfer, need to be considered in terms of carbonaceous electrocatalysts because weak supports often give unstable or poor performance in electrochemical environments. Coal can be a reasonable option for an attractive carbon source in view of its low expense, extensive reserve and natural robustness. Conversion of coal to coal-based carbon, instead of conventionally burning it off as fuel to emit CO2, is increasingly finding its own niche in the forefront of chemical engineering. However, pore propagation and surface modification of coal are difficult to handle due to its hardness characteristics, limiting performance enhancement of coal-based catalysts. To tackle this problem, we propose a double-round activation/doping method and disclose significant influences of different reaction sequences on structure-performance correlations. The coal-based metal-free N,P-doped porous carbon materials manifest the improved performance of electrocatalytic oxygen reduction in the alkaline, acidic and neutral electrolytes, along with robust behaviours including good resistance to harmful ions and conceptual demonstration of electrochemical devices. It is also revealed that the electrocatalytic performance of coal-based catalysts is closely related both to their textural properties and to concerted effects induced by the coexistence and uniform distributions of N and P atoms doped into carbon matrices, as demonstrated by the experimental and theoretical results. Consequently, this work gives intriguing insights into structural evolution and performance enhancement of robust coal-based electrocatalysts from the perspective of reaction sequences and provides inspiration for low-carbon utilization of coal in regard to coal-to-carbon transformations." @default.
• W4384408518 created "2023-07-16" @default.
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• W4384408518 date "2023-10-01" @default.
• W4384408518 modified "2023-10-14" @default.
• W4384408518 title "Structural evolution and performance enhancement of coal-based metal-free N,P-doped porous carbon electrocatalysts for pH-universal oxygen reduction" @default.
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• W4384408518 doi "https://doi.org/10.1016/j.ces.2023.119077" @default.
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