气候变化领域集成服务门户(CCPortal): Helical cobalt borophosphates to master durable overall water-splitting

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DOI	10.1039/c8ee01669k
	Helical cobalt borophosphates to master durable overall water-splitting
	Menezes P.W.; Indra A.; Zaharieva I.; Walter C.; Loos S.; Hoffmann S.; Schlögl R.; Dau H.; Driess M.
发表日期	2019
ISSN	1754-5692
起始页码	988
结束页码	999
卷号	12 期号:3
英文摘要	The sustainable electrochemical production of hydrogen from water is a key element in the transition toward carbon-neutral energy systems. Application at a global scale requires the discovery of precious metal-free electrocatalysts that unify high energetic efficiency, long-term stability and economic viability. Here we report the striking properties of noble metal-free, alkali-metal cobalt borophosphates acting as robust and efficient materials for bi-functional electrocatalytic water-splitting to give hydrogen and oxygen. Alkali-metal cobalt borophosphates are porous crystalline inorganic materials with chiral DNA-like helical structures bearing two chemically distinct types of water molecules, coordinated and strands of hydrate water associated via hydrogen bonds, located in the channels, which are predestined to possess superior catalytic performance. Depending on the applied electrode potential, they can be reversibly switched between catalysis of the hydrogen and oxygen evolution reactions, both at low overpotentials. This bifunctionality provides access to technologically simple overall water-splitting systems with energetic efficiencies exceeding the 75% level (above 90% based on a higher heating value) and uncompromised long-term stability, now verified with a two-and-a-half month period. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Alkali metals; Calorific value; Cobalt compounds; Electrocatalysts; Hydrogen bonds; Molecules; Precious metals; Stereochemistry; Catalytic performance; Electrode potentials; Energetic efficiency; Higher heating value; Metal-free electrocatalysts; Oxygen evolution reaction; Production of hydrogen; Water splitting system; Hydrogen production; cobalt; crystallinity; electrochemistry; electrode; heating; hydrogen; hydrolysis; inorganic matter; oxygen
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162675
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; Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, Berlin, 14195, Germany
推荐引用方式 GB/T 7714	Menezes P.W.,Indra A.,Zaharieva I.,et al. Helical cobalt borophosphates to master durable overall water-splitting[J],2019,12(3).
APA	Menezes P.W..,Indra A..,Zaharieva I..,Walter C..,Loos S..,...&Driess M..(2019).Helical cobalt borophosphates to master durable overall water-splitting.Energy and Environmental Science,12(3).
MLA	Menezes P.W.,et al."Helical cobalt borophosphates to master durable overall water-splitting".Energy and Environmental Science 12.3(2019).