Effects of Ion Energy and Density on the Plasma Etching-Induced Surface Area, Edge Electrical Field, and Multivacancies in MoSe2 Nanosheets for Enhancement of the Hydrogen Evolution Reaction

doi:10.1002/smll.202001470

	Effects of Ion Energy and Density on the Plasma Etching-Induced Surface Area, Edge Electrical Field, and Multivacancies in MoSe2 Nanosheets for Enhancement of the Hydrogen Evolution Reaction
	Xiao, Dezhi 3,4; Ruan, Qingdong 3,4; Bao, De-Liang 2,5,6; Luo, Yang 3,4; Huang, Chao 3,4; Tang, Siying 3,4; Shen, Jie 1; Cheng, Cheng 1; Chu, Paul K.3,4
刊名	SMALL
	2020-05-28
关键词	edge electric field etched through-holes hydrogen evolution reaction multivacancies plasma simulation plasma-induced damage
ISSN号	1613-6810
DOI	10.1002/smll.202001470
通讯作者	Chu, Paul K.(paul.chu@cityu.edu.hk)
英文摘要	Plasma functionalization can increase the efficiency of MoSe2 in the hydrogen evolution reaction (HER) by providing multiple species but the interactions between the plasma and catalyst are not well understood. In this work, the effects of the ion energy and plasma density on the catalytic properties of MoSe2 nanosheets are studied. The through-holes resulting from plasma etching and multi-vacancies induced by plasma-induced damage enhance the HER efficiency as exemplified by a small overpotential of 148 mV at 10 mA cm(-2) and Tafel slope of 51.6 mV dec(-1) after the plasma treatment using a power of 20 W. The interactions between the plasma and catalyst during etching and vacancies generation are evaluated by plasma simulation. Finite element and first-principles density functional theory calculations are also conducted and the results are consistent with the experimental results, indicating that the improved HER catalytic activity stems from the enhanced electric field and more active sites on the catalyst, and reduced bandgap and adsorption energy arising from the etched through-holes and vacancies, respectively. The results convey new fundamental knowledge about the plasma effects and means to enhance the efficiency of catalysts in water splitting as well insights into the design of high-performance HER catalysts.
资助项目	Hong Kong Scholars Program[XJ2018009] ; City University of Hong Kong Strategic Research Grant (SRG)[7005105]
WOS关键词	CATALYTIC-ACTIVITY ; ELECTROCATALYSTS ; VACANCIES ; PHASE
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000535817600001
资助机构	Hong Kong Scholars Program ; City University of Hong Kong Strategic Research Grant (SRG)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103191]
专题	中国科学院合肥物质科学研究院
通讯作者	Chu, Paul K.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA 3.City Univ Hong Kong, Dept Phys, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong 999077, Peoples R China 4.City Univ Hong Kong, Dept Biomed Engn, Kowloon, Tat Chee Ave, Hong Kong 999077, Peoples R China 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 6.Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Dezhi,Ruan, Qingdong,Bao, De-Liang,et al. Effects of Ion Energy and Density on the Plasma Etching-Induced Surface Area, Edge Electrical Field, and Multivacancies in MoSe2 Nanosheets for Enhancement of the Hydrogen Evolution Reaction[J]. SMALL,2020.
APA	Xiao, Dezhi.,Ruan, Qingdong.,Bao, De-Liang.,Luo, Yang.,Huang, Chao.,...&Chu, Paul K..(2020).Effects of Ion Energy and Density on the Plasma Etching-Induced Surface Area, Edge Electrical Field, and Multivacancies in MoSe2 Nanosheets for Enhancement of the Hydrogen Evolution Reaction.SMALL.
MLA	Xiao, Dezhi,et al."Effects of Ion Energy and Density on the Plasma Etching-Induced Surface Area, Edge Electrical Field, and Multivacancies in MoSe2 Nanosheets for Enhancement of the Hydrogen Evolution Reaction".SMALL (2020).