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DOI	10.1039/c7ee03619a
	A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting
	Menezes P.W.; Panda C.; Loos S.; Bunschei-Bruns F.; Walter C.; Schwarze M.; Deng X.; Dau H.; Driess M.
发表日期	2018
ISSN	17545692
起始页码	1287
结束页码	1298
卷号	11 期号:5
英文摘要	The design and development of economical and highly efficient electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions are vital in lowering the overall energy losses in alkaline water electrolysis. Here we present a nickel phosphite, Ni11(HPO3)8(OH)6, belonging to the unique class of phosphorus-based inorganic materials with striking structural features that have been explored for the first time in the reaction of electrocatalytic overall water splitting with a profound understanding of the system using in situ and ex situ techniques. When electrophoretically deposited, the nickel phosphite exhibited remarkable electrocatalytic activity, yielding considerably low overpotentials for both the OER and HER with extreme structural stability and enhanced durability in alkaline media. Apart from the attractive structural merits, the higher activity of nickel phosphite is mainly attributed to the formation of oxidized nickel species in the catalytic OER process, while subtle experimental evidence of the participation of phosphite anions for the acceleration of the HER with the support of Ni2+ cations as catalytically active sites is identified, which is highly compelling and has never been previously discovered. Finally, the bifunctionality of nickel phosphite was demonstrated by constructing an alkaline water electrolyzer with a low cell voltage and over 4 days of undiminishing stability. This work offers an appealing cost-effective system based on earth-abundant metals for water electrolysis and can be extended to other transition metal based homo- or hetero-bimetallic phosphites. © 2018 The Royal Society of Chemistry.
英文关键词	Cost effectiveness; Electrocatalysts; Electrolysis; Energy dissipation; Stability; Alkaline water electrolysis; Bifunctional electrocatalysts; Cost effective systems; Design and Development; Electrocatalytic activity; Hydrogen evolution reactions; Oxygen evolution reaction; Structural stabilities; Nickel; anion; catalyst; chemical reaction; electrokinesis; energy; nickel; phosphate; transition element
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/190251
作者单位	Department of Chemistry, Metalorganics and Inorganic Materials, Technische Universität Berlin, Straße des 17 Juni 135, Sekr. C2, Berlin, 10623, Germany; Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany
推荐引用方式 GB/T 7714	Menezes P.W.,Panda C.,Loos S.,et al. A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting[J],2018,11(5).
APA	Menezes P.W..,Panda C..,Loos S..,Bunschei-Bruns F..,Walter C..,...&Driess M..(2018).A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting.Energy & Environmental Science,11(5).
MLA	Menezes P.W.,et al."A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting".Energy & Environmental Science 11.5(2018).