Nitrogen-doping hollow carbon nanospheres derived from conjugated microporous polymers toward oxygen reduction reaction

doi:10.1016/j.jcis.2022.02.136

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	Nitrogen-doping hollow carbon nanospheres derived from conjugated microporous polymers toward oxygen reduction reaction
	Sun, Hanxue; Zhou, Peilei; Ye, Xingyun; Wang, Juanjuan; Tian, Zhuoyue; Zhu, Zhaoqi; Ma, Chonghua; Liang, Weidong; Li, An
刊名	Journal of Colloid and Interface Science
	2022-07-01
卷号	617 页码:11-19
关键词	Carbon Catalyst activity Conjugated polymers Electrocatalysts Electrolytic reduction Fuel cells Microporosity Morphology Nanospheres Nitrogen Porous materials Pyrolysis Spheres Conjugated microporous polymers Hollow carbon nanospheres Metal-free catalysts Metal-free electrocatalysts N-Doping Nitrogen-doping Oxygen reduction reaction Porous organic polymers Pt/C catalysts Pyrolysis temperature
ISSN号	0021-9797
DOI	10.1016/j.jcis.2022.02.136
英文摘要	The exploitation non-precious or metal-free electrocatalysts of oxygen reduction reaction (ORR) is of significance for construction of next-generation fuel cells. In this work, hollow-spherical conjugated microporous polymers (CMPs) comprising porphyrin units were synthesized as precursors to prepare N-doping porous carbon spheres (CMP-NP-x) by a direct pyrolysis method. The as-resulted CMP-NP-x exhibited spherical morphology with hollow structure similar to that of CMPs precursors. The BET surface area of CMP-NP-x can be tailored by the pyrolysis temperature varying from 868 m2 g−1 to 1118 m2 g−1. According to XPS analysis, the pyrrolic N content in the sample decreased but the graphitic N and pyridinic N increased with increasing of the pyrolysis temperature from 800 °C to 1000 °C. Taking advantages of porous structure with large accessible surface areas and N species active sites, the resulting CMP-NP-x showed superior ORR activity and methanol tolerance to commercial Pt/C catalyst. In particular, CMP-NP-900 possesses the highest onset potential (0.930 V), half-wave potential (0.857 V) and limiting current density of 4.45 mA cm−2, compared with Pt/C catalyst and other samples, making it a promising metal-free catalyst superior to commercial Pt/C catalyst in alkalic condition. © 2022
WOS研究方向	Chemistry
语种	英语
出版者	Academic Press Inc.
WOS记录号	WOS:000806636600002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158014]
专题	石油化工学院
作者单位	Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Sun, Hanxue,Zhou, Peilei,Ye, Xingyun,et al. Nitrogen-doping hollow carbon nanospheres derived from conjugated microporous polymers toward oxygen reduction reaction[J]. Journal of Colloid and Interface Science,2022,617:11-19.
APA	Sun, Hanxue.,Zhou, Peilei.,Ye, Xingyun.,Wang, Juanjuan.,Tian, Zhuoyue.,...&Li, An.(2022).Nitrogen-doping hollow carbon nanospheres derived from conjugated microporous polymers toward oxygen reduction reaction.Journal of Colloid and Interface Science,617,11-19.
MLA	Sun, Hanxue,et al."Nitrogen-doping hollow carbon nanospheres derived from conjugated microporous polymers toward oxygen reduction reaction".Journal of Colloid and Interface Science 617(2022):11-19.