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Two-Dimensional Titanium Carbide (Ti3C2Tx) MXenes of Different Flake Sizes Studied by Scanning Electrochemical Microscopy in Different Electrolytes
Gupta, Sanju1,2; Ringo, Wyatt3; Hu, Minmin4; Wang, Xiaohui4
Corresponding AuthorGupta, Sanju(sgup77@gmail.com)
2020-04-09
Source PublicationJOURNAL OF ELECTRONIC MATERIALS
ISSN0361-5235
Volume49Issue:6Pages:17
AbstractTwo-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.
KeywordTwo-dimensional material MXenes flake (particle) size surface redox chemistry scanning electrochemical microscopy
Funding OrganizationNSF-MRI grant ; KY NSF RSP grant ; KY NSF REG grant ; WKU Research Foundation RCAP internal Award ; Gatton Academy of Mathematics and Science
DOI10.1007/s11664-020-08123-9
Indexed BySCI
Language英语
Funding ProjectNSF-MRI grant[1429563] ; KY NSF RSP grant ; KY NSF REG grant ; WKU Research Foundation RCAP internal Award ; Gatton Academy of Mathematics and Science
WOS Research AreaEngineering ; Materials Science ; Physics
WOS SubjectEngineering, Electrical & Electronic ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000524922300005
PublisherSPRINGER
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138226
Collection中国科学院金属研究所
Corresponding AuthorGupta, Sanju
Affiliation1.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
Recommended Citation
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.
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