A bottom-up, template-free route to mesoporous N-doped carbons for efficient oxygen electroreduction
A bottom-up, template-free route to mesoporous N-doped carbons for efficient oxygen electroreduction
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一种自下而上、无模板的介孔氮掺杂碳路线,用于有效的氧电还原
DOI:
10.1007/s10853-017-1165-8
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发表时间:
2017-05
影响因子:
4.5
通讯作者:
Wang Xiufang
中科院分区:
文献类型:
--
作者:
Wu Jinghao;Liu Ji;Li Ligui;Wang Xiufang
Herein, we report a facile, bottom-up route to the preparation of N-doped carbons with a high surface area as well as plenty of hierarchical pores by thermal annealing the black bread-like sulfuric acid-dehydrated sucrose. This simple sulfuric acid treatment created a remarkable surface area of 645.7 m2/g in the dehydrated sucrose, and the subsequent thermal annealing with activated reagent ZnCl2and nitrogen source NH4Cl helped further generated more porous textures in the carbon matrix, which contributes to a high surface area of 2450 m2/g, a large number of hierarchical pores ranging from 2 to 150 nm in a highly porous N-doped carbon to sufficiently expose active sites and boost mass transfer. The best sample N/PC-800, which was thermally annealed at 800 °C, is able to selectively catalyze the 4e−ORR process and shows higher working stability, stronger tolerance to methanol crossover effect, a very comparable onset potential and diffusion-limited current density in alkaline electrolyte, compared to the benchmark Pt/C catalyst. The results in this study signify the validity of present facile, robust template-free method in the synthesis of highly porous N-doped carbons for electrochemical energy conversion and storage.
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影响因子:
16.6
作者:
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通讯作者:
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影响因子:
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DOI:
10.1002/celc.201500002
发表时间:
2015-06
期刊:
--
影响因子:
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作者:
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通讯作者:
Xiaojun Liu;Ligui Li;Weijia Zhou;Yucheng Zhou;W. Niu;Shaowei Chen