气候变化领域集成服务门户(CCPortal): Vertically aligned NiS2/CoS2/MoS2 nanosheet array as an efficient and low-cost electrocatalyst for hydrogen evolution reaction in alkaline media

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DOI	10.1016/j.scib.2019.12.003
	Vertically aligned NiS2/CoS2/MoS2 nanosheet array as an efficient and low-cost electrocatalyst for hydrogen evolution reaction in alkaline media
	Zhang Y.; Shi M.; Wang C.; Zhu Y.; Li N.; Pu X.; Yu A.; Zhai J.
发表日期	2020
ISSN	20959273
起始页码	359
结束页码	366
卷号	65 期号:5
英文摘要	Recently, the rational design of non-precious metal electrocatalysts for highly efficient hydrogen evolution reaction (HER) in alkaline media has received considerable interests in sustainable and renewable energy researches. Herein, vertically aligned and interconnected NiS2/CoS2/MoS2 nanosheet arrays on Ni foam were prepared by a two-step procedure that conducted by the hydrothermal synthesis of Ni-Co molybdate nanosheet array as the precursor and followed by the vapor phase sulfurization to achieve in situ conversion. Basing on the scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations, it can be found that the honeycomb-like structure of the Ni-Co molybdate nanosheet array was well preserved after the sulfurization process. The high-resolution TEM (HRTEM) characterization reveals that the NiS2/CoS2/MoS2 nanosheet array provided abundant well-exposed active edge sites and multiple heterointerfaces towards enhanced alkaline HER performance. Electrochemical studies demonstrated that the ultrathin NiS2/CoS2/MoS2 nanosheets exhibited excellent HER performance with an overpotential of 112 mV at 10 mA cm−2 and a smaller Tafel slope of 59 mV dec−1 in comparison with NiS2/MoS2 (155 mV and 89 mV dec−1) and CoS2/MoS2 (124 mV and 75 mV dec−1) samples by taking the advantage of the well-exposed multiple heterointerfaces. This work presents a facile and reliable synthetic strategy for the rational design of highly efficient electrocatalysts for the HER in alkaline solution based on non-precious metal sulfide nanocomposite. © 2019 Science China Press
关键词	Hydrogen evolution reaction In situ conversion Metal sulfides Multiple heterointerfaces Nanosheet array
英文关键词	Binary alloys; Costs; Electrocatalysts; High resolution transmission electron microscopy; Hydrothermal synthesis; Nanosheets; Precious metals; Scanning electron microscopy; Sulfur compounds; Electrochemical studies; Hetero-interfaces; Honeycomblike structures; Hydrogen evolution reactions; Metal sulfides; Nanosheet arrays; Transmission electron microscopy (TEM) characterizations; Vapor phase sulfurization; Cobalt alloys
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207310
作者单位	Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China; Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil, Engineering and Architecture, Beijing, 100044, China; School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Zhang Y.,Shi M.,Wang C.,et al. Vertically aligned NiS2/CoS2/MoS2 nanosheet array as an efficient and low-cost electrocatalyst for hydrogen evolution reaction in alkaline media[J],2020,65(5).
APA	Zhang Y..,Shi M..,Wang C..,Zhu Y..,Li N..,...&Zhai J..(2020).Vertically aligned NiS2/CoS2/MoS2 nanosheet array as an efficient and low-cost electrocatalyst for hydrogen evolution reaction in alkaline media.Science Bulletin,65(5).
MLA	Zhang Y.,et al."Vertically aligned NiS2/CoS2/MoS2 nanosheet array as an efficient and low-cost electrocatalyst for hydrogen evolution reaction in alkaline media".Science Bulletin 65.5(2020).