In Situ Time-Resolved X-ray Absorption Fine Structure and Small Angle X-ray Scattering Revealed an Unexpected Phase Structure Transformation during the Growth of Nickel Phosphide Nanoparticles

doi:10.1021/acs.jpcc.8b03883

	In Situ Time-Resolved X-ray Absorption Fine Structure and Small Angle X-ray Scattering Revealed an Unexpected Phase Structure Transformation during the Growth of Nickel Phosphide Nanoparticles
	Wu, ZH; Mo, G; Xing, XQ; Chen, ZJ; Yan, S; Gong, Y; Jiao, SQ; Yu, HY; Sun, DB; Tan, YY
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2018
卷号	122 期号:28 页码:16397-16405
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.8b03883
文献子类	Article
英文摘要	Nickel phosphide (Ni-P) nanoparticles have been extensively studied because of their promising catalytic activities in both hydrogen evolution reaction and oxygen evolution reaction. However, controllable synthesis of the nickel phosphide catalyst is still a challenge because of its complex phase transformations during the synthesis procedure. Deep understanding of the nanoparticle formation mechanism should be taken into account for an efficient catalyst tailoring of size, shape, structure, and eventually performance. Unfortunately, there are only few reports regarding their formation processes. In this regard, we investigated the formation process of Ni-P nanoparticles by a conjunction of in situ X-ray absorption fine structure (XAFS) from the Ni K-edge, ex situ XAFS from the P K-edge, in situ small angle X-ray scattering, and high-resolution transmission electron microscopy techniques. A novel phase structure transformation was unraveled from views of evolutions of chemical valence, coordination structures, and size distributions along with the reaction time. The results demonstrated a four-stage formation mechanism of Ni-P nanoparticles: nucleation of crystalline Ni, nucleation of Ni-P, phase transformation from crystalline Ni to noncrystalline Ni-P, and growth of noncrystalline Ni-P nanoparticles. Furthermore, different growth manners were also observed at different growing stages. Our results shed light on efficient control of the phase structure, particle size, and compositions of nickel phosphide nanoparticles, which would enlighten and promote their further development.
WOS关键词	METAL NANOCLUSTER FORMATION ; HYDROGEN EVOLUTION REACTION ; NI-P NANOPARTICLES ; PLATINUM NANOPARTICLES ; CONTINUOUS NUCLEATION ; XAFS SPECTROSCOPY ; SOLID-SOLUTIONS ; MECHANISM ; TEMPERATURE ; CRYSTALLIZATION
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
WOS记录号	WOS:000439661000069
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286139]
专题	高能物理研究所_多学科研究中心
通讯作者	Wu ZH(吴忠华)
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	Wu, ZH,Mo, G,Xing, XQ,et al. In Situ Time-Resolved X-ray Absorption Fine Structure and Small Angle X-ray Scattering Revealed an Unexpected Phase Structure Transformation during the Growth of Nickel Phosphide Nanoparticles[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2018,122(28):16397-16405.
APA	Wu, ZH.,Mo, G.,Xing, XQ.,Chen, ZJ.,Yan, S.,...&Cai, Q.(2018).In Situ Time-Resolved X-ray Absorption Fine Structure and Small Angle X-ray Scattering Revealed an Unexpected Phase Structure Transformation during the Growth of Nickel Phosphide Nanoparticles.JOURNAL OF PHYSICAL CHEMISTRY C,122(28),16397-16405.
MLA	Wu, ZH,et al."In Situ Time-Resolved X-ray Absorption Fine Structure and Small Angle X-ray Scattering Revealed an Unexpected Phase Structure Transformation during the Growth of Nickel Phosphide Nanoparticles".JOURNAL OF PHYSICAL CHEMISTRY C 122.28(2018):16397-16405.