Superior oxygen reduction electrocatalysis enabled by integrating   hierarchical pores, Fe3C nanoparticles and bamboo-like carbon nanotubes

doi:10.1039/c5nr08008h

CORC > 北京大学 > 工学院

	Superior oxygen reduction electrocatalysis enabled by integrating hierarchical pores, Fe3C nanoparticles and bamboo-like carbon nanotubes
	Yang, Wenxiu ; Yue, Xiaoyu ; Liu, Xiangjian ; Chen, Lulu ; Jia, Jianbo ; Guo, Shaojun
刊名	NANOSCALE
	2016
关键词	NITROGEN-DOPED CARBON METAL-FREE ELECTROCATALYST HIGHLY EFFICIENT FUEL-CELLS GRAPHENE CATALYSTS SULFUR CO DECOMPOSITION PERFORMANCE
DOI	10.1039/c5nr08008h
英文摘要	Hierarchical porous carbon nanostructures doped with nitrogen or other active elements have been demonstrated to be of importance in enhancing the oxygen reduction reaction (ORR) activity. However, their intrinsic limited active sites usually make them exhibit lower ORR activity than commercial Pt/C. In order to solve well this challenging issue, herein we develop a simple method for encapsulating more electrochemically active Fe3C nanoparticles (NPs) into the channels of bamboo-like carbon nanotubes (bCNTs) with interesting 3D hierarchical micro-, meso- and macropores by impregnating the bCNTs with a Fe(NO3)(3) solution, followed by the calcination of the composite under a N-2 atmosphere. The resulting bCNT/Fe3C hybrid electrocatalysts with much more active sites exhibit excellent ORR activity in acidic media with the half-wave potential of 0.710 V comparable to the commercial Pt/C catalyst (0.782 V). Furthermore, they show very high ORR activity in 0.10 M KOH with the half-wave potential of 0.879 V, 67 mV more positive than that of the Pt/C catalyst. Most importantly, the as-prepared new catalysts are very stable for ORR in both acidic and alkaline solutions with almost no ORR polarization curve shift after 3000 cycles, much better than that of the Pt/C catalyst. To the best of our knowledge, our new bCNT/Fe3C catalyst is the best non-noble-metal catalyst ever reported for ORR under both acidic and alkaline conditions. The present work highlights the important roles of introducing more stable Fe3C NPs and hierarchical micro-, meso-and macropores as much more active sites in maximizing the ORR electrocatalysis performance.; Ministry of Science and Technology of China [2013YQ170585]; Peking University; Young Thousand Talented Program; SCI(E); EI; PubMed; ARTICLE; jbjia@ciac.ac.cn; sjguo@coe.pku.edu.cn; 2; 959-964; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435911]
专题	工学院
推荐引用方式 GB/T 7714	Yang, Wenxiu,Yue, Xiaoyu,Liu, Xiangjian,et al. Superior oxygen reduction electrocatalysis enabled by integrating hierarchical pores, Fe3C nanoparticles and bamboo-like carbon nanotubes[J]. NANOSCALE,2016.
APA	Yang, Wenxiu,Yue, Xiaoyu,Liu, Xiangjian,Chen, Lulu,Jia, Jianbo,&Guo, Shaojun.(2016).Superior oxygen reduction electrocatalysis enabled by integrating hierarchical pores, Fe3C nanoparticles and bamboo-like carbon nanotubes.NANOSCALE.
MLA	Yang, Wenxiu,et al."Superior oxygen reduction electrocatalysis enabled by integrating hierarchical pores, Fe3C nanoparticles and bamboo-like carbon nanotubes".NANOSCALE (2016).