Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction

doi:10.1007/s40820-017-0157-1

	Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction
	Xing, Ruohao 1; Zhou, Tingsheng 1; Zhou, Yao 1; Ma, Ruguang 1; Liu, Qian 1,2; Luo, Jun 2; Wang, Jiacheng 1,2
刊名	NANO-MICRO LETTERS
	2018
卷号	10 期号:1
关键词	Hierarchical pores Hollow cores N doping Electrocatalysis Oxygen reduction reaction
ISSN号	2311-6706
DOI	10.1007/s40820-017-0157-1
英文摘要	A series of triple hierarchical micro-mesomacroporous N-doped carbon shells with hollow cores have been successfully prepared via etching N-doped hollow carbon spheres with CO2 at high temperatures. The surface areas, total pore volumes and micropore percentages of the CO2-activated samples evidently increase with increasing activation temperature from 800 to 950 degrees C, while the N contents show a contrary trend from 7.6 to 3.8 at%. The pyridinic and graphitic nitrogen groups are dominant among various N-containing groups in the samples. The 950 degrees C-activated sample (CANHCS-950) has the largest surface area (2072 m(2) g(-1)), pore volume (1.96 cm(3) g(-1)), hierarchical micro-mesopore distributions (1.2, 2.6 and 6.2 nm), hollow macropore cores (similar to 91 nm) and highest relative content of pyridinic and graphitic N groups. This triple micro-meso-macropore system could synergistically enhance the activity because macropores could store up the reactant, mesopores could reduce the transport resistance of the reactants to the active sites, and micropores could be in favor of the accumulation of ions. Therefore, the CANHCS-950 with optimized structure shows the optimal and comparable oxygen reduction reaction (ORR) activity but superior methanol tolerance and long-term durability to commercial Pt/C with a 4e(-)-dominant transfer pathway in alkaline media. These excellent properties in combination with good stability and recyclability make CANHCSs among the most promising metal-free ORR electrocatalysts reported so far in practical applications. [GRAPHICS]
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000414106100003
资助机构	The authors thank the financial support from the National Key Research and Development Program of China (2016YFB0700204), NSFC (51502327, 51602332), Science and Technology Commission of Shanghai Municipality (15520720400, 15YF1413800, 14DZ2261203 and 16DZ2260603), Key Project for Young Researcher of State Key Laboratory of High Performance Ceramics and Superfine Microstructure and One Hundred Talent Plan of Chinese Academy of Sciences. ; The authors thank the financial support from the National Key Research and Development Program of China (2016YFB0700204), NSFC (51502327, 51602332), Science and Technology Commission of Shanghai Municipality (15520720400, 15YF1413800, 14DZ2261203 and 16DZ2260603), Key Project for Young Researcher of State Key Laboratory of High Performance Ceramics and Superfine Microstructure and One Hundred Talent Plan of Chinese Academy of Sciences.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24618]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Shanghai Univ, Sch Mat Sci & Engn, 99 Shangda Rd, Shanghai 200444, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 3.Shanghai Inst Mat Genome, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Xing, Ruohao,Zhou, Tingsheng,Zhou, Yao,et al. Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction[J]. NANO-MICRO LETTERS,2018,10(1).
APA	Xing, Ruohao.,Zhou, Tingsheng.,Zhou, Yao.,Ma, Ruguang.,Liu, Qian.,...&Wang, Jiacheng.(2018).Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction.NANO-MICRO LETTERS,10(1).
MLA	Xing, Ruohao,et al."Creation of Triple Hierarchical Micro-Meso-Macroporous N-doped Carbon Shells with Hollow Cores Toward the Electrocatalytic Oxygen Reduction Reaction".NANO-MICRO LETTERS 10.1(2018).