当前位置：
X-MOL 学术
›
ACS Sustain. Chem. Eng.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Two-Dimensional Wrinkled N-Rich Carbon Nanosheets Fabricated from Chitin via Fast Pyrolysis as Optimized Electrocatalyst
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-06-30 , DOI: 10.1021/acssuschemeng.0c03104 Lingfeng Gao 1 , Daofa Ying 1 , Tao Shen 2 , Yiran Zheng 1 , Jie Cai 1 , Deli Wang 2 , Lina Zhang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-06-30 , DOI: 10.1021/acssuschemeng.0c03104 Lingfeng Gao 1 , Daofa Ying 1 , Tao Shen 2 , Yiran Zheng 1 , Jie Cai 1 , Deli Wang 2 , Lina Zhang 1
Affiliation
|
Two-dimensional (2D) carbon nanosheets have been widely applied in many fields, and introduction of controllable N species and a wrinkled structure in 2D carbon is an appealing strategy to optimize their properties. Herein, we report a straightforward strategy for bifunctional regulation on the surface morphology (from a smooth to a wrinkled structure) and N doping of 2D carbon nanosheets by fast-pyrolyzing chitin nanosheets, which was obtained via a “top-down” exfoliation method. Our findings demonstrated that the heating rate was a key to determine the 2D wrinkled structure and type of N doping of the carbon nanosheets, and 2D wrinkled carbon nanosheets (PCNs-800-10) with hierarchical pores and enriched N species could be obtained under an optimized pyrolysis condition (ramp rate 10 °C min–1, at 800 °C for 2 h). When used as a metal-free electrocatalyst for the oxygen reduction reaction (ORR), PCNs-800-10 exhibits admirable activity, high selectivity, and excellent cycling durability of over 10 000 cycles. This was the first study to achieve the simultaneous regulation on both the wrinkled structure and the N species of 2D carbons by utilizing natural nitrogen-containing chitin without utilizing any substrates and nitrogen-containing additives, which can be extended to many other energy storage/conversion materials.
中文翻译：
几丁质通过快速热解作为优化的电催化剂制备的二维起皱的富N碳纳米片
二维（2D）碳纳米片已广泛应用于许多领域，在2D碳中引入可控N物种和起皱结构是优化其性能的诱人策略。本文中，我们报告了一种通过表面快速热解几丁质纳米片对表面形态（从光滑结构到皱纹结构）和N掺杂二维碳纳米片进行双功能调节的简单策略，这是通过“自上而下”的剥离方法获得的。我们的研究结果表明，加热速率是确定碳纳米片的2D皱纹结构和N掺杂类型的关键，并且可以在有条件的条件下获得具有分层孔和富集N的2D皱纹碳纳米片（PCNs-800-10）。优化的热解条件（升温速率10°C min –1，在800°C下放置2小时）。当PCNs-800-10用作氧还原反应（ORR）的无金属电催化剂时，表现出令人赞叹的活性，高选择性和超过10 000次循环的优异循环耐久性。这是第一项通过使用天然含氮几丁质而不使用任何底物和含氮添加剂同时实现皱纹结构和2D碳的N物种同时调节的研究，该方法可以扩展到许多其他能量存储/转化材料。
更新日期：2020-07-27
中文翻译：
几丁质通过快速热解作为优化的电催化剂制备的二维起皱的富N碳纳米片
二维（2D）碳纳米片已广泛应用于许多领域，在2D碳中引入可控N物种和起皱结构是优化其性能的诱人策略。本文中，我们报告了一种通过表面快速热解几丁质纳米片对表面形态（从光滑结构到皱纹结构）和N掺杂二维碳纳米片进行双功能调节的简单策略，这是通过“自上而下”的剥离方法获得的。我们的研究结果表明，加热速率是确定碳纳米片的2D皱纹结构和N掺杂类型的关键，并且可以在有条件的条件下获得具有分层孔和富集N的2D皱纹碳纳米片（PCNs-800-10）。优化的热解条件（升温速率10°C min –1，在800°C下放置2小时）。当PCNs-800-10用作氧还原反应（ORR）的无金属电催化剂时，表现出令人赞叹的活性，高选择性和超过10 000次循环的优异循环耐久性。这是第一项通过使用天然含氮几丁质而不使用任何底物和含氮添加剂同时实现皱纹结构和2D碳的N物种同时调节的研究，该方法可以扩展到许多其他能量存储/转化材料。
京公网安备 11010802027423号