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Nitrogen-doped hollow mesoporous carbon spheres as a highly active and stable metal-free electrocatalyst for oxygen reduction
Zhou, Tingsheng1,2; Zhou, Yao1; Ma, Ruguang1; Zhou, Zhenzhen1; Liu, Guanghui1; Liu, Qian1,3; Zhu, Yufang2; Wang, Jiacheng1,3
2017
发表期刊Carbon
ISSN00086223
卷号114页码:177-186
摘要Nitrogen-doped hollow mesoporous carbon spheres (NHCSs) were successfully prepared via a simple, scalable hydrothermal method, followed by thermal treatment at 650 °C in ammonia atmosphere and subsequent high temperature annealing at 800–1000 °C in nitrogen, respectively. The resulting NHCSs with a particle diameter of ∼150 nm and a shell thickness of ∼20–25 nm have high specific surface areas (738–820 m2g−1), large pore volume (0.50–0.56 cm3g−1), bimodal pores system (3.9 and 51.6 nm) and adjustable N-doping levels (3.6–7.8 at.%) depending on the pyrolysis temperature. The unique structure of hollow spheres for NHCSs with uniform mesopores throughout the shells can both promote fast mass transfer and provide inner and outer surfaces with high density of N-related active sites, thus improving the reaction kinetics. The NHCS-1000 (annealed at 1000 °C) exhibited not only comparable ORR activity with a direct four-electron reaction pathway in terms of onset and half-wave potentials, and limiting current densities, but superior long-term durability and methanol-tolerance to commercial Pt/C catalyst, because it has the highest relative content of graphitic-N and pyridinic-N groups, indicating their crucial roles in ORR. The NHCS-1000 with excellent ORR performance is of potential to replace Pt/C catalyst for ORR in practical applications. © 2016 Elsevier Ltd
DOI10.1016/j.carbon.2016.12.011
EI入藏号20165103134393
EI主题词Doping (additives)
EI分类号641.3 Mass Transfer - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally
引用统计
被引频次:32[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25871
专题中国科学院上海硅酸盐研究所
通讯作者Wang, Jiacheng
作者单位1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai; 200050, China;
2.School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai; 200093, China;
3.Shanghai Institute of Materials Genome, Shanghai, China
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Zhou, Tingsheng,Zhou, Yao,Ma, Ruguang,et al. Nitrogen-doped hollow mesoporous carbon spheres as a highly active and stable metal-free electrocatalyst for oxygen reduction[J]. Carbon,2017,114:177-186.
APA Zhou, Tingsheng.,Zhou, Yao.,Ma, Ruguang.,Zhou, Zhenzhen.,Liu, Guanghui.,...&Wang, Jiacheng.(2017).Nitrogen-doped hollow mesoporous carbon spheres as a highly active and stable metal-free electrocatalyst for oxygen reduction.Carbon,114,177-186.
MLA Zhou, Tingsheng,et al."Nitrogen-doped hollow mesoporous carbon spheres as a highly active and stable metal-free electrocatalyst for oxygen reduction".Carbon 114(2017):177-186.
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