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Increased activity of nitrogen-doped graphene-like carbon sheets modified by iron doping for oxygen reduction
Zhou, Tingsheng; Ma, Ruguang; Zhang, Tao; Li, Zichuang; Yang, Minghui; Liu, Qian; Zhu, Yufang; Wang, Jiacheng
2019-02-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume536Pages:42
SubtypeArticle
AbstractRational design and synthesis of Fe-N-codoped carbon materials are promising for replacing commercial Pt/C for oxygen reduction reaction (ORR). Herein, we develop a simple two-step pyrolysis approach to synthesize highly active Fe-N-codoped graphene-like carbon sheets (FeNGC) with active Fe-N-based species for ORR. In this strategy, two-dimensional nitrogen-doped graphene-like carbon sheets (NGC) with a high N-doping level (8.1 at%) and abundant mesoporosity (3.8 nm) are firstly synthesized by co-pyrolysis of biomass carbon source and dicyandiamide, in which dicyandiamide simultaneously serves as a trifunctional role of in situ reaction template, nitrogen source and porogen. Secondly, FeNGCs are prepared by additional iron doping of NGC at high temperatures, in which sheet-like structure is in favor of increased accessibility of N-functional groups to more Fe atoms, thus giving rise to formation of high-density Fe-N-based active sites. The optimized catalyst synthesized at 950 degrees C (FeNGC-950) demonstrates significantly increased ORR activity with a dominant 4e(-) reduction process compared to pure NGC in alkaline and acidic solutions, which evidently shows the comparable activity to Pt/C due to the synergy of simultaneously optimized structures and multi-active sites. Moreover, FeNGC-950 has better long-term stability and methanol tolerance than Pt/C both in alkaline and acidic electrolytes. The present strategy paves a new venue to design and prepare various metal-doped carbon materials with great potentials in energy applications. (C) 2018 Elsevier Inc. All rights reserved.
KeywordElectrocatalysis Oxygen reduction Carbon sheets N-doping Fe modification
DOI10.1016/j.jcis.2018.10.021
WOS KeywordMETAL-FREE ELECTROCATALYST ; HIGH-PERFORMANCE ; MESOPOROUS CARBON ; EFFICIENT ; NANOSHEETS ; CATALYST ; SPHERES ; NANOPARTICLES ; ARCHITECTURES ; ELECTRODE
Language英语
WOS Research AreaChemistry
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27553
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Zhou, Tingsheng,Ma, Ruguang,Zhang, Tao,et al. Increased activity of nitrogen-doped graphene-like carbon sheets modified by iron doping for oxygen reduction[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2019,536:42.
APA Zhou, Tingsheng.,Ma, Ruguang.,Zhang, Tao.,Li, Zichuang.,Yang, Minghui.,...&Wang, Jiacheng.(2019).Increased activity of nitrogen-doped graphene-like carbon sheets modified by iron doping for oxygen reduction.JOURNAL OF COLLOID AND INTERFACE SCIENCE,536,42.
MLA Zhou, Tingsheng,et al."Increased activity of nitrogen-doped graphene-like carbon sheets modified by iron doping for oxygen reduction".JOURNAL OF COLLOID AND INTERFACE SCIENCE 536(2019):42.
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