气候变化领域集成服务门户(CCPortal): Efficient alkaline hydrogen evolution on atomically dispersed Ni-N x Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics

CCPortal

DOI	10.1039/c8ee01841c
	Efficient alkaline hydrogen evolution on atomically dispersed Ni-N x Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics
	Lei C.; Wang Y.; Hou Y.; Liu P.; Yang J.; Zhang T.; Zhuang X.; Chen M.; Yang B.; Lei L.; Yuan C.; Qiu M.; Feng X.
发表日期	2019
ISSN	17545692
起始页码	149
结束页码	156
卷号	12 期号:1
英文摘要	Developing inexpensive and efficient electrocatalysts for hydrogen evolution reaction (HER) during alkaline water electrolysis is crucial for renewable and sustainable energy harvesting. Herein, we report a novel hybrid electrocatalyst comprising atomically dispersed Ni-N x species anchored porous carbon (Ni-N-C) matrix with embedded Ni nanoparticles for HER. This new catalyst is synthesized via pyrolysis of hydrothermally prepared supermolecular composite of dicyandiamide and Ni ions followed by an acid etching treatment. The achieved hybrid exhibits superior catalytic performance toward HER with a small overpotential of 147 mV at 10 mA cm -2 and a low Tafel slope of 114 mV dec -1 , comparable to those of state-of-the-art heteroatom-doped nanocarbon catalysts and even outperforming other reported transition-metal-based compounds in basic media. Experimental observations and theoretical calculations reveal that the presence of Ni nanoparticles can optimize surface states of Ni-N x active centers and reduce energy barriers of dissociated water molecules, which synergistically improve OH - adsorption and promote HER kinetics. When served as electrodes for both cathode and anode, an alkaline water electrolyzer could afford a current density of 10 mA cm -2 at a low cell voltage of 1.58 V, rivalling the sufficiently high overpotentials of integrated Pt/C-Ir/C benchmark electrodes. © 2019 The Royal Society of Chemistry.
英文关键词	Carbon; Electrocatalysts; Electrodes; Energy harvesting; Molecules; Nanocatalysts; Nanoparticles; Porous materials; Alkaline water electrolysis; Catalytic performance; Dissociated waters; Hydrogen evolution reactions; Sustainable energy; Theoretical calculations; Transition-metal-based compounds; Water dissociation; Nickel; alkaline water; carbon; catalyst; electrochemical method; electrokinesis; hydrogen; nanoparticle; nickel; nitrogen; optimization; porous medium; pyrolysis; reaction kinetics; water treatment
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/190025
作者单位	Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China; WPI Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan; CREST, JST, 4-1-8 Honcho Kawaguchi, Saitama, 332-0012, Japan; Center for Advancing Electronics Dresden (Cfaed) and Department of Chemistry and Food Chemistry, Technische Universitaet Dresden, Dresden, 01062, Germany; Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, United States; Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan, 430079, China
推荐引用方式 GB/T 7714	Lei C.,Wang Y.,Hou Y.,et al. Efficient alkaline hydrogen evolution on atomically dispersed Ni-N x Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics[J],2019,12(1).
APA	Lei C..,Wang Y..,Hou Y..,Liu P..,Yang J..,...&Feng X..(2019).Efficient alkaline hydrogen evolution on atomically dispersed Ni-N x Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics.Energy & Environmental Science,12(1).
MLA	Lei C.,et al."Efficient alkaline hydrogen evolution on atomically dispersed Ni-N x Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics".Energy & Environmental Science 12.1(2019).