Self-supported NbSe2 nanosheet arrays for highly efficient ammonia electrosynthesis under ambient conditions

doi:10.1016/j.jcat.2019.10.029

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Self-supported NbSe2 nanosheet arrays for highly efficient ammonia electrosynthesis under ambient conditions
	Wang, Yong 1; Chen, Anran 1; Lai, Shuhua 4; Peng, Xianyun 4; Zhao, Shunzheng 3; Hu, Guangzhi 1; Qiu, Yuan 4; Ren, Junqiang 2; Liu, Xijun 4; Luo, Jun 4
	2020
关键词	Ammonia Density functional theory Efficiency Electrocatalysts Electrolytes Electrolytic reduction Hydrogen Nanosheets Reaction kinetics Selenium compounds Sodium sulfateAqueous electrolyte Electro reduction Faradaic efficiencies Hydrogen evolution Nano-architecture NH3 electrosynthesis Reversible hydrogen electrodes Self-supported
卷号	381
DOI	10.1016/j.jcat.2019.10.029
页码	78-83
英文摘要	As a promising alternative to the Haber–Bosch process for producing NH3, the electrocatalytic nitrogen reduction reaction (NRR) in the aqueous electrolyte has attracted much attention. However, the presence of sluggish reaction kinetics and competitive hydrogen evolution could result in poor activity and unsatisfactory selectivity. Herein, self-supported NbSe2 nanosheet arrays have been prepared and tested as electrocatalysts for NH3 electrosynthesis with a Faradaic efficiency of 13.9 ± 1.0% at −0.4 V versus the reversible hydrogen electrode (vs RHE) and a yield rate of 89.5 ± 6.0 μg h−1 mgcat.−1 at −0.45 V vs RHE in 0.1 M Na2SO4 under ambient conditions. Moreover, this electrocatalyst showed excellent durability during the 60-h electrolysis (no stable decay of Faradaic efficiencies and NH3 yield rates). Furthermore, density functional theory calculations disclosed that NbSe2 can effectively catalyze the dissociation of the adsorbed N2 molecule and thus promote the NRR process. © 2019 Elsevier Inc.
会议录	Journal of Catalysis
会议录出版者	Academic Press Inc.
语种	英语
ISSN号	00219517
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132658]
专题	省部共建有色金属先进加工与再利用国家重点实验室设计艺术学院继续教育学院
作者单位	1.School of Chemical Science and Technology, School of Energy, Yunnan University, Kunming; 650091, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China 3.Department of Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China; 4.Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin; 300384, China;
推荐引用方式 GB/T 7714	Wang, Yong,Chen, Anran,Lai, Shuhua,et al. Self-supported NbSe2 nanosheet arrays for highly efficient ammonia electrosynthesis under ambient conditions[C]. 见:.