Two-Dimensional Titanium Carbide (Ti3C2Tx) MXenes of Different Flake Sizes Studied by Scanning Electrochemical Microscopy in Different Electrolytes

doi:10.1007/s11664-020-08123-9

IMR OpenIR

	Two-Dimensional Titanium Carbide (Ti3C2Tx) MXenes of Different Flake Sizes Studied by Scanning Electrochemical Microscopy in Different Electrolytes
	Gupta, Sanju 1,2; Ringo, Wyatt 3; Hu, Minmin 4; Wang, Xiaohui 4
通讯作者	Gupta, Sanju(sgup77@gmail.com)
	2020-04-09
发表期刊	JOURNAL OF ELECTRONIC MATERIALS
ISSN	0361-5235
卷号	49 期号:6 页码:17
摘要	Two-dimensional (2D) layered materials are studied in efforts to discover new compounds and for their fascinating properties engendered by their sheet-like structure and tunable surfaces. MXenes are an emergent class of layered, synthesized transition metal carbides and carbonitrides that are useful in addressing the formidable challenges of sensing at the energy-water nexus. This work reports systematic structural and electrochemical properties of titanium carbide (Ti3C2Tx) MXenes revealed by varying interlayer spacing, flake thickness and lateral size under different electrolytes. In addition to traditional electrode kinetics, we utilized surface sensitive scanning electrochemical microscopy (SECM) to gain a more complete understanding of rich MXene surface chemistry and corresponding knowledge about the physicochemical processes, including inherent electrochemistry and heterogeneous charge transfer characteristics, at electrode/electrolyte (solid/liquid) interfaces. We employed electron microscopy, ultraviolet-visible (UV-Vis) absorption spectroscopy, x-ray diffraction, and Raman spectroscopy to determine surface morphology, microscopic and electronic structure and lattice vibrational properties. It is shown that Ti3C2Tx or, specifically, transition metal Ti, undergoes irreversible oxidation and lithiation in a positive potential window, which strongly depends on the flake thickness and type (aqueous versus organic) of the electrolyte. Multi-layered and smaller Ti3C2Tx flakes exhibit faster electron transfer kinetics (k(ET) = 1.2 cm s(-1)) with a potassium ferrocyanide [Fe(CN)(6)](4-/3-) redox probe, compared to few-layered Ti3C2Tx (k(ET) = 0.3 cm s(-1)) in aqueous and organic electrolyte (k(ET) = 4.9 cm s(-1)) with a [Fe(CN)(6)](4-/3-) redox probe, and compared to a few-layered Ti3C2Tx (k(ET) = 0.9 cm s(-1)). In addition, the few-layered free standing Ti3C2Tx film electrode remains intact following irreversible oxidation. These properties help to establish structure-property-electroactivity relationships among different types of Ti3C2Tx MXenes.
关键词	Two-dimensional material MXenes flake (particle) size surface redox chemistry scanning electrochemical microscopy
资助者	NSF-MRI grant ; KY NSF RSP grant ; KY NSF REG grant ; WKU Research Foundation RCAP internal Award ; Gatton Academy of Mathematics and Science
DOI	10.1007/s11664-020-08123-9
收录类别	SCI
语种	英语
资助项目	NSF-MRI grant[1429563] ; KY NSF RSP grant ; KY NSF REG grant ; WKU Research Foundation RCAP internal Award ; Gatton Academy of Mathematics and Science
WOS研究方向	Engineering ; Materials Science ; Physics
WOS类目	Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000524922300005
出版者	SPRINGER
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138226
专题	中国科学院金属研究所
通讯作者	Gupta, Sanju
作者单位	1.Western Kentucky Univ, Dept Phys & Astron, 1906 Coll Hts Blvd, Bowling Green, KY 42101 USA 2.CUNY City Coll, Dept Chem & Biochem, New York, NY 10031 USA 3.Western Kentucky Univ, Gatton Acad Math & Sci, Dept Phys & Astron, 1906 Coll Hts Blvd, Bowling Green, KY 42101 USA 4.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gupta, Sanju,Ringo, Wyatt,Hu, Minmin,et al. Two-Dimensional Titanium Carbide (Ti3C2Tx) MXenes of Different Flake Sizes Studied by Scanning Electrochemical Microscopy in Different Electrolytes[J]. JOURNAL OF ELECTRONIC MATERIALS,2020,49(6):17.
APA	Gupta, Sanju,Ringo, Wyatt,Hu, Minmin,&Wang, Xiaohui.(2020).Two-Dimensional Titanium Carbide (Ti3C2Tx) MXenes of Different Flake Sizes Studied by Scanning Electrochemical Microscopy in Different Electrolytes.JOURNAL OF ELECTRONIC MATERIALS,49(6),17.
MLA	Gupta, Sanju,et al."Two-Dimensional Titanium Carbide (Ti3C2Tx) MXenes of Different Flake Sizes Studied by Scanning Electrochemical Microscopy in Different Electrolytes".JOURNAL OF ELECTRONIC MATERIALS 49.6(2020):17.