气候变化领域集成服务门户(CCPortal): A hierarchical nickel-carbon structure templated by metal-organic frameworks for efficient overall water splitting

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DOI	10.1039/c8ee00934a
	A hierarchical nickel-carbon structure templated by metal-organic frameworks for efficient overall water splitting
	Sun H.; Lian Y.; Yang C.; Xiong L.; Qi P.; Mu Q.; Zhao X.; Guo J.; Deng Z.; Peng Y.
发表日期	2018
ISSN	17545692
起始页码	2363
结束页码	2371
卷号	11 期号:9
英文摘要	The development of high-performance and cost-effective catalysts for the hydrogen and oxygen evolution reactions is key to efficient electrocatalysis of water, which offers a promising solution to convert and store those green but unsteady energies. Herein, we report a hierarchical nickel-carbon composite, fabricated by directly growing sheet-like Ni-MOFs on commercial nickel foam prior to high-temperature annealing, as a highly efficient bifunctional catalyst. This composite shows remarkable catalytic activities for both the hydrogen and oxygen evolution reactions in an alkaline electrolyte, affording a current density of 10 mA cm-2 at an overpotential of 37 mV for the HER and 265 mV for the OER. Furthermore, an electrolyzer employing the composite as a bifunctional catalyst in both the cathode and the anode delivers a current density of 35.9 mA cm-2 at a cell voltage of 1.60 V with extended stability, which is even superior to the integrated Pt/C and RuO2 counterparts. This excellent performance is believed to be a result of a concerted synergy due to its hierarchical structure, enabling excellent reaction kinetics. Further ex situ XRD and XPS analyses reveal that while metallic nickel is responsible for the HER, Ni nanoparticles with an oxide shell encapsulated in graphitic carbon are the OER catalytically-active sites formed in situ. © 2018 The Royal Society of Chemistry.
英文关键词	Carbon carbon composites; Catalyst activity; Cost effectiveness; Crystalline materials; Electrocatalysis; Electrodes; Electrolytes; Hydrogen; Organometallics; Oxygen; Platinum compounds; Reaction kinetics; Ruthenium compounds; Alkaline electrolytes; Bi-functional catalysts; Carbon structures; Extended stabilities; Hierarchical structures; High-temperature annealing; Metal organic framework; Oxygen evolution reaction; Foams; carbon; catalyst; electrokinesis; hierarchical system; hydrogen; hydrolysis; nickel; organometallic compound; oxygen; performance assessment
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/190145
作者单位	Soochow Institute for Energy and Materials Innovations, College of Physics, Optoelectronics and Energy and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215006, China; Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China; Analysis and Testing Center, Soochow University, Suzhou, 215123, China
推荐引用方式 GB/T 7714	Sun H.,Lian Y.,Yang C.,et al. A hierarchical nickel-carbon structure templated by metal-organic frameworks for efficient overall water splitting[J],2018,11(9).
APA	Sun H..,Lian Y..,Yang C..,Xiong L..,Qi P..,...&Peng Y..(2018).A hierarchical nickel-carbon structure templated by metal-organic frameworks for efficient overall water splitting.Energy & Environmental Science,11(9).
MLA	Sun H.,et al."A hierarchical nickel-carbon structure templated by metal-organic frameworks for efficient overall water splitting".Energy & Environmental Science 11.9(2018).