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首页> 外文期刊>Advanced Functional Materials >Heteroatom (N or N-S)-Doping Induced Layered and Honeycomb Microstructures of Porous Carbons for CO2 Capture and Energy Applications
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Heteroatom (N or N-S)-Doping Induced Layered and Honeycomb Microstructures of Porous Carbons for CO2 Capture and Energy Applications

机译：杂原子（N或N-S）掺杂诱导的多孔碳层状和蜂窝状微结构，用于CO2捕集和能源应用

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摘要

Increasing global challenges such as climate change, environmental pollution, and energy shortage have stimulated the worldwide explorations into novel and clean materials for their applications in the capture of carbon dioxide, a major greenhouse gas, and toxic pollutants, energy conversion, and storage. In this study, two microstructured carbons, namely N-doped pillaring layered carbon (NC) and N, S codoped honeycomb carbon (NSC), have been fabricated through a one-pot pyrolysis process of a mixture containing glucose, sodium bicarbonate, and urea or thiourea. The heteroatom doping is found to induce tailored microstructures featuring highly interconnected pore frameworks, high sp(2)-C ratios, and high surface areas. The formation mechanism of the varying pore frameworks is believed to be hydrogen-bond interactions. NSC displays a similar CO2 adsorption capacity (4.7 mmol g(-1) at 0 degrees C), a better CO2/N-2 selectivity, and higher activity in oxygen reduction reaction as compared with NC-3 (the NC sample with the highest N content of 7.3%). NSC favors an efficient four-electron reduction pathway and presents better methanol tolerance than Pt/C in alkaline media. The porous carbons also exhibit excellent rate performance as supercapacitors.
机译：气候变化，环境污染和能源短缺等日益严峻的全球挑战刺​​激了世界范围内对新颖，清洁材料的探索，这些新材料可用于捕获二氧化碳，主要温室气体和有毒污染物，能源转换和存储。在这项研究中，通过一锅热解包含葡萄糖，碳酸氢钠和尿素的混合物，制备了两种微结构碳，分别为N掺杂柱状分层碳（NC）和N，S共掺杂蜂窝状碳（NSC）。或硫脲。发现杂原子掺杂会诱导定制的微结构，这些结构具有高度互连的孔框架，高sp（2）-C比和高表面积。人们认为，变化的孔骨架的形成机理是氢键相互作用。 NSC与NC-3（NC含量最高的NC样品）表现出相似的CO2吸附容量（0摄氏度时为4.7 mmol g（-1）），更好的CO2 / N-2选择性以及更高的氧还原反应活性N含量为7.3％。 NSC支持有效的四电子还原途径，并且在碱性介质中比Pt / C具有更好的甲醇耐受性。多孔碳作为超级电容器也具有出色的倍率性能。

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  • 来源
    《Advanced Functional Materials》 |2016年第47期|8651-8661|共11页
  • 作者

    Tian Wenjie; Zhang Huayang; Sun Hongqi; Suvorova Alexandra; Saunders Martin; Tade Moses; Wang Shaobin;

  • 作者单位

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia|Curtin Univ, CRC CARE, GPO Box U1987, Perth, WA 6845, Australia;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia|Curtin Univ, CRC CARE, GPO Box U1987, Perth, WA 6845, Australia;

    Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Joondalup, WA 6027, Australia;

    Univ Western Australia, Ctr Microscopy Characterisat & Anal, Crawley, WA 6009, Australia;

    Univ Western Australia, Ctr Microscopy Characterisat & Anal, Crawley, WA 6009, Australia;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia|Curtin Univ, CRC CARE, GPO Box U1987, Perth, WA 6845, Australia;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia|Curtin Univ, CRC CARE, GPO Box U1987, Perth, WA 6845, Australia;

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