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DOI	10.1039/c9ee03231b
	Highly efficient H2 production from H2S: Via a robust graphene-encapsulated metal catalyst
	Zhang M.; Guan J.; Tu Y.; Chen S.; Wang Y.; Wang S.; Yu L.; Ma C.; Deng D.; Bao X.
发表日期	2020
ISSN	17545692
起始页码	119
结束页码	126
卷号	13 期号:1
英文摘要	The electrocatalytic decomposition of the abundant and toxic H2S from industrial by-products is a promising energy conversion technology for H2 production and simultaneously removing this environmental pollutant. However, the development of such a technology has been hindered by the lack of low-cost, efficient and robust electrocatalysts. Herein, we reported a remarkable graphene-encapsulated metal catalyst, i.e., nitrogen-doped graphene encapsulating a non-precious CoNi nanoalloy as the anode for highly efficient electrocatalytic H2 production from H2S. This optimized catalyst could drive the anode reaction at an onset potential of 0.25 V, which was 1.24 V lower than that required for the water oxidation reaction, and delivered almost twice current density than that of Pt/C. Meanwhile, it exhibited approximately 98% H2 faradaic efficiency and maintained long-term durability for more than 500 h without any decay. The density functional theory calculations revealed that the CoNi and nitrogen dopants synergistically facilitated the formation of polysulfides on graphene's surfaces. Furthermore, a demo showed 1200 h stability for removing H2S impurities from industrial syngas to produce hydrogen by this graphene-encapsulated metal catalyst, demonstrating its great potential for hydrogen production toward sustainable energy applications. © 2020 The Royal Society of Chemistry.
英文关键词	Anodes; Binary alloys; Cobalt alloys; Density functional theory; Doping (additives); Electrocatalysts; Energy conversion; Environmental technology; Graphene; Nitrogen; Synthesis gas manufacture; Electrocatalytic; Energy conversion technologies; Environmental pollutants; Faradaic efficiencies; Industrial by-products; Long term durability; Nitrogen doped graphene; Sustainable energy; Hydrogen production
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/189755
作者单位	State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (IChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; State Key Laboratory of Catalysis, IChEM, Dalian Institute of Chemical Physics, Chinese Academy of Science Zhongshan, Road 457, Dalian, 116023, China; School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China; Center for High Resolution Electron Microscopy, College of Materials Science and Engineering, Hunan University, Changsha, 410082, China
推荐引用方式 GB/T 7714	Zhang M.,Guan J.,Tu Y.,et al. Highly efficient H2 production from H2S: Via a robust graphene-encapsulated metal catalyst[J],2020,13(1).
APA	Zhang M..,Guan J..,Tu Y..,Chen S..,Wang Y..,...&Bao X..(2020).Highly efficient H2 production from H2S: Via a robust graphene-encapsulated metal catalyst.Energy & Environmental Science,13(1).
MLA	Zhang M.,et al."Highly efficient H2 production from H2S: Via a robust graphene-encapsulated metal catalyst".Energy & Environmental Science 13.1(2020).