Metal-organic framework - derived Co9S8@CoS@CoO@C nanoparticles as   efficient electro- and photo-catalysts for the oxygen evolution reaction

doi:10.1039/c7ta01447c

CORC > 北京大学 > 化学与分子工程学院

	Metal-organic framework - derived Co9S8@CoS@CoO@C nanoparticles as efficient electro- and photo-catalysts for the oxygen evolution reaction
	Long, Jiying ; Gong, Yun ; Lin, Jianhua
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017
关键词	LITHIUM-ION BATTERIES HIGH-PERFORMANCE SUPERCAPACITORS NITROGEN-DOPED GRAPHENE WATER OXIDATION COBALT OXIDE BIFUNCTIONAL ELECTROCATALYSTS ANODE MATERIALS BINDER-FREE REDUCTION REACTION CARBON
DOI	10.1039/c7ta01447c
英文摘要	Through an annealing method, Co9S8@CoS@CoO@C nanoparticles (NPs) of 5-20 nm size were synthesized using a metal-organic framework (MOF) as the precursor. The Co9S8@CoS@CoO@C NPs exhibited excellent electrocatalytic activity for the oxygen evolution reaction (OER) with a lower overpotential than RuO2 (0.37 V) and Pt NPs (0.60 V). The better electrocatalytic activity of the hybrid material is associated with its heterojunction structure, in which the strong electron coupling interactions between Co9S8, CoS, CoO and C give rise to a superior synergistic effect. The interconnected amorphous carbon not only anchored the active Co compounds to avoid aggregation, but also afforded conducting channels for electron transfer. Furthermore, the cobalt compounds were the active species in the sample during the OER process; they were converted into CoOOH and Co(OH)(2) in the KOH electrolyte, and the S elements in the sample entered the solution. The Co9S8@CoS@CoO@C NPs can exhibit the best OER activity with minimum overpotential (0.028 V) to afford a stable OER current after activation in a KOH aqueous solution. The sample also showed obvious photoresponse to visible light irradiation with enhanced OER current and lowered onset potential, which was probably associated with the semiconducting characteristics of the spin-polarized CoO and the quantum confinement effect of the nanoparticles.; National Natural Science Foundation of China [21371184]; Large-Scale Instrument and Equipment Open Foundation in Chongqing University [201606150053]; National-Municipal Joint Engineering Laboratory for Chemical Process Intensification and Reaction; Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization; SCI(E); ARTICLE; 21; 10495-10509; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472876]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Long, Jiying,Gong, Yun,Lin, Jianhua. Metal-organic framework - derived Co9S8@CoS@CoO@C nanoparticles as efficient electro- and photo-catalysts for the oxygen evolution reaction[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017.
APA	Long, Jiying,Gong, Yun,&Lin, Jianhua.(2017).Metal-organic framework - derived Co9S8@CoS@CoO@C nanoparticles as efficient electro- and photo-catalysts for the oxygen evolution reaction.JOURNAL OF MATERIALS CHEMISTRY A.
MLA	Long, Jiying,et al."Metal-organic framework - derived Co9S8@CoS@CoO@C nanoparticles as efficient electro- and photo-catalysts for the oxygen evolution reaction".JOURNAL OF MATERIALS CHEMISTRY A (2017).