The formation of (NiFe)S-2 pyrite mesocrystals as efficient pre-catalysts for water oxidation

doi:10.1039/c7sc05452a

	The formation of (NiFe)S-2 pyrite mesocrystals as efficient pre-catalysts for water oxidation
	Ouyang, C; Wang, X; Zhuang, J; Long, Y; Zhang, SM; Wang, JO; Wang JO(王嘉鸥); He, T; Ni, B
刊名	CHEMICAL SCIENCE
	2018
卷号	9 期号:10 页码:2762-2767
ISSN号	2041-6520
DOI	10.1039/c7sc05452a
文献子类	Article
英文摘要	Designing intricate structures and searching for functional materials has attracted wide interest in nanoscience. Herein we have fabricated (NiFe)S-2 pyrite mesocrystals in the form of nearly-single crystalline porous cubes, and studied their self-optimization to realize efficient activity toward water oxidation under electrochemical conditions. The growth mechanism of the mesocrystals was a non-classical mechanism, which was initiated by the formation of a large quantity of small nickel sulfide clusters, followed by the aggregation and transformation of these small clusters in an oriented manner. When these mesocrystals were tested for water oxidation under electrocatalytic conditions, the materials served as pre-catalysts and immediately self-optimized to form amorphous S-doped metal (oxy) hydroxides, which are the real catalytically active materials. As a result, the observed overpotential to reach a current density of 10 mA cm(-2) on glassy carbon electrodes was less than 260 mV. The growth mechanism studied here may provide opportunities for constructing intricate sulfide structures, and the self-optimization process during water oxidation can inspire new thoughts on electrocatalysis.
电子版国际标准刊号	2041-6539
WOS关键词	OXYGEN EVOLUTION REACTION ; SINGLE-CRYSTALS ; ELECTROCATALYSTS ; CRYSTALLIZATION ; SUPERSTRUCTURES ; NANOPLATELETS ; NANOCRYSTALS ; BIOMINERALS ; ALIGNMENT ; OXIDES
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000431100300014
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285873]
专题	高能物理研究所_多学科研究中心高能物理研究所_实验物理中心中国科学院高能物理研究所_中国散裂中子源
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Ouyang, C,Wang, X,Zhuang, J,et al. The formation of (NiFe)S-2 pyrite mesocrystals as efficient pre-catalysts for water oxidation[J]. CHEMICAL SCIENCE,2018,9(10):2762-2767.
APA	Ouyang, C.,Wang, X.,Zhuang, J.,Long, Y.,Zhang, SM.,...&Ni, B.(2018).The formation of (NiFe)S-2 pyrite mesocrystals as efficient pre-catalysts for water oxidation.CHEMICAL SCIENCE,9(10),2762-2767.
MLA	Ouyang, C,et al."The formation of (NiFe)S-2 pyrite mesocrystals as efficient pre-catalysts for water oxidation".CHEMICAL SCIENCE 9.10(2018):2762-2767.