气候变化领域集成服务门户(CCPortal): Phosphine vapor-assisted construction of heterostructured Ni2P/NiTe2catalysts for efficient hydrogen evolution

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DOI	10.1039/d0ee00666a
	Phosphine vapor-assisted construction of heterostructured Ni2P/NiTe2catalysts for efficient hydrogen evolution
	Li Y.; Tan X.; Tan H.; Ren H.; Chen S.; Yang W.; Smith S.C.; Zhao C.
发表日期	2020
ISSN	17545692
起始页码	1799
结束页码	1807
卷号	13 期号:6
英文摘要	Heterostructured catalysts with unique interfaces and properties endow distinct advantages for many electrochemical reactions. Herein, a phosphine (PH3) vapor-assisted phase and structure engineering strategy is developed for the controllable conversion of non-active NiTe into a heterostructured active Ni2P/NiTe2 catalyst for alkaline hydrogen evolution reaction (HER). The crystalline NiTe2 phase in situ generated in a PH3 vapor environment and the nanosheet morphology both contribute to the outstanding alkaline HER performance with an overpotential of only 62 mV to achieve a current density of -10 mA cm-2. Experimental and DFT mechanistic studies suggest the Ni2P/NiTe2 interfaces provide abundant exposed active sites. The Ni2P/NiTe2 catalyst shows the lowest kinetic barrier for water dissociation and the adsorbed H∗ can simultaneously bind to two Ni atoms at the interface of Ni2P/NiTe2(011), which greatly enhances the H∗ binding and HER activities. DFT simulation also shows that more electrons transfer from Ni atoms to H∗ on Ni2P/NiTe2(011) (0.22 e-) than that on NiTe2(011) (0.13 e-), which explains the enhanced H∗ binding at the Ni2P/NiTe2(011) interface. The PH3 vapor synthetic approach is also applied to treat other chalcogenide-based materials with low HER activities, such as Ni3S2, to create Ni2P/NiS2 interfaces for significantly enhanced HER activity. © The Royal Society of Chemistry.
英文关键词	Catalysts; Hydrogen; Hydrogen evolution reaction; Nanocrystalline materials; Nickel; Phosphorus compounds; Electrochemical reactions; Hydrogen evolution; Kinetic barrier; Mechanistic studies; Overpotential; Structure engineering; Synthetic approach; Water dissociation; Nickel compounds
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189642
作者单位	School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia; Integrated Materials Design Laboratory, Department of Applied Mathematics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia; National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
推荐引用方式 GB/T 7714	Li Y.,Tan X.,Tan H.,et al. Phosphine vapor-assisted construction of heterostructured Ni2P/NiTe2catalysts for efficient hydrogen evolution[J],2020,13(6).
APA	Li Y..,Tan X..,Tan H..,Ren H..,Chen S..,...&Zhao C..(2020).Phosphine vapor-assisted construction of heterostructured Ni2P/NiTe2catalysts for efficient hydrogen evolution.Energy & Environmental Science,13(6).
MLA	Li Y.,et al."Phosphine vapor-assisted construction of heterostructured Ni2P/NiTe2catalysts for efficient hydrogen evolution".Energy & Environmental Science 13.6(2020).