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Babuska T, Reed CL, Banga D, Larson SR, Mings A, Curry JF, Dugger MT. Electrodeposited Mo xS yO z/Ni Tribological Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5776-5784. [PMID: 38456666 PMCID: PMC10956497 DOI: 10.1021/acs.langmuir.3c03518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/14/2024] [Accepted: 02/18/2024] [Indexed: 03/09/2024]
Abstract
Deposition of molybdenum disulfide (MoS2) coatings using physical vapor deposition (PVD) and mechanical burnishing has been widely assessed for solid lubricants in space applications but still suffers from line-of-sight constraints on complex geometries. Here, we highlight one of the first demonstrations of electrodeposited MoxSyOz and MoxSyOz/Ni thin-film coatings from aqueous solutions of ammonium tetrathiomolybdate for solid lubricant applications and their remarkable ability to provide low coefficients of friction and high wear resistance. Characterization of the coating morphology shows amorphous microstructures with a high oxygen content and cracking upon drying. Even so, electrodeposited MoxSyOz can achieve low steady-state coefficients of friction (μ ∼ 0.05-0.06) and wear rates (2.6 × 10-7 mm3/(N m)) approaching those of physical vapor deposited coatings (2.3 × 10-7 mm3/(N m)). Additionally, we show that adding dopants such as nickel increased the wear rate (7.5 × 10-7 mm3/(N m)) and initial coefficient of friction (μi = 0.23) due to compositional modifications such as dramatic sub-stoichiometry (S/Mo ∼ 1) and expression of a NiOx surface layer, although doping did reduce the degree of cracking upon drying.
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Affiliation(s)
- Tomas
F. Babuska
- Sandia
National Laboratories, Albuquerque, New Mexico 87185-0889, United States
| | - Christopher L. Reed
- Sandia
National Laboratories, Livermore, California 94551-0969, United States
| | - Dhego Banga
- Sandia
National Laboratories, Livermore, California 94551-0969, United States
| | - Steven R. Larson
- Sandia
National Laboratories, Albuquerque, New Mexico 87185-0889, United States
| | - Alexander Mings
- Sandia
National Laboratories, Albuquerque, New Mexico 87185-0889, United States
| | - John F. Curry
- Sandia
National Laboratories, Albuquerque, New Mexico 87185-0889, United States
| | - Michael T. Dugger
- Sandia
National Laboratories, Albuquerque, New Mexico 87185-0889, United States
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2
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George T, Brosseau CL, Masuda JD. Electrochemical and X-ray structural evidence of multiple molybdenum precursor candidates from a reported non-aqueous electrodeposition of molybdenum disulfide. RSC Adv 2023; 13:32199-32216. [PMID: 37920754 PMCID: PMC10619629 DOI: 10.1039/d3ra04605b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/06/2023] [Indexed: 11/04/2023] Open
Abstract
A published report of electrodeposited molybdenum(iv) disulfide microflowers at 100 °C in the ionic liquid N-methyl-N-propylpiperidinium bis(trifluoromethane)sulfonimide (PP13-TFSI) from 1,4-butanedithiol and the concentrated filtrate from a reaction mixture of molybdenum(vi) trioxide and ethylene glycol could not be reproduced reliably, affording numerous uniquely coloured reaction mixtures that precipitated a variety of crystalline molybdenum coordination complexes. Further attempts to use the same two of these filtrates to electrodeposit molybdenum(iv) disulfide from 0.1 M PP13-TFSI in tetrahydrofuran with 1,4-butanedithiol at room temperature were unsuccessful. Various crude reaction mixtures grew crystals of different identity from eight attempts to synthesize the reported molybdenum-precursor. Single crystal X-ray diffraction (SC-XRD) offered insight into a wide range of structural features from four candidate paramagnetic precursor compounds, including a novel organomolybdenum cluster. Electrochemical studies of the various molybdenum-precursor filtrates, ethylene glycol, and 1,4-butanedithiol were conducted in 0.1 M PP13-TFSI in tetrahydrofuran, offering insight into differences between preparations of the molybdenum-precursor and interference between ethylene glycol and 1,4-butanedithiol on platinum working electrodes. Molybdenum(iv) disulfide electrodeposition attempts included cyclic voltammetry and chronoamperometry on platinum and glassy carbon working electrodes, which led to either no deposited material, or molybdenum, carbon, oxygen, and sulfur containing amorphous and non-homogenous deposits, as indicated by SEM-EDS analysis.
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Affiliation(s)
- Tanner George
- Department of Chemistry, Saint Mary's University Halifax Nova Scotia Canada B3H 3C3
| | - Christa L Brosseau
- Department of Chemistry, Saint Mary's University Halifax Nova Scotia Canada B3H 3C3
| | - Jason D Masuda
- Department of Chemistry, Saint Mary's University Halifax Nova Scotia Canada B3H 3C3
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3
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Zhang W, Liu M, Gu X, Shi Y, Deng Z, Cai N. Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers. Chem Rev 2023. [PMID: 36749705 DOI: 10.1021/acs.chemrev.2c00573] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Since severe global warming and related climate issues have been caused by the extensive utilization of fossil fuels, the vigorous development of renewable resources is needed, and transformation into stable chemical energy is required to overcome the detriment of their fluctuations as energy sources. As an environmentally friendly and efficient energy carrier, hydrogen can be employed in various industries and produced directly by renewable energy (called green hydrogen). Nevertheless, large-scale green hydrogen production by water electrolysis is prohibited by its uncompetitive cost caused by a high specific energy demand and electricity expenses, which can be overcome by enhancing the corresponding thermodynamics and kinetics at elevated working temperatures. In the present review, the effects of temperature variation are primarily introduced from the perspective of electrolysis cells. Following an increasing order of working temperature, multidimensional evaluations considering materials and structures, performance, degradation mechanisms and mitigation strategies as well as electrolysis in stacks and systems are presented based on elevated temperature alkaline electrolysis cells and polymer electrolyte membrane electrolysis cells (ET-AECs and ET-PEMECs), elevated temperature ionic conductors (ET-ICs), protonic ceramic electrolysis cells (PCECs) and solid oxide electrolysis cells (SOECs).
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Affiliation(s)
- Weizhe Zhang
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China.,Beijing Institute of Smart Energy, Changping District, Beijing 102209, China
| | - Menghua Liu
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China.,Beijing Institute of Smart Energy, Changping District, Beijing 102209, China
| | - Xin Gu
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China
| | - Yixiang Shi
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China.,Beijing Institute of Smart Energy, Changping District, Beijing 102209, China
| | - Zhanfeng Deng
- Beijing Institute of Smart Energy, Changping District, Beijing 102209, China
| | - Ningsheng Cai
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Haidian District, Beijing 100084, China
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4
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Chotkowski M, Połomski D, Czerwinski K. Potential Application of Ionic Liquids for Electrodeposition of the Material Targets for Production of Diagnostic Radioisotopes. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5069. [PMID: 33182812 PMCID: PMC7697952 DOI: 10.3390/ma13225069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/31/2020] [Accepted: 11/06/2020] [Indexed: 12/28/2022]
Abstract
An overview of the reported electrochemistry studies on the chemistry of the element for targets for isotope production in ionic liquids (ILs) is provided. The majority of investigations have been dedicated to two aspects of the reactive element chemistry. The first part of this review presents description of the cyclotron targets properties, especially physicochemical characterization of irradiated elements. The second part is devoted to description of the electrodeposition procedures leading to obtain elements or their alloys coatings (e.g., nickel, uranium) as the targets for cyclotron and reactor generation of the radioisotopes. This review provides an evaluation of the role ILs can have in the production of isotopes.
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Affiliation(s)
- Maciej Chotkowski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland;
- Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Damian Połomski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland;
- Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland
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5
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Noori YJ, Thomas S, Ramadan S, Smith DE, Greenacre VK, Abdelazim N, Han Y, Beanland R, Hector AL, Klein N, Reid G, Bartlett PN, Kees de Groot CH. Large-Area Electrodeposition of Few-Layer MoS 2 on Graphene for 2D Material Heterostructures. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49786-49794. [PMID: 33079533 DOI: 10.1021/acsami.0c14777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Heterostructures involving two-dimensional (2D) transition metal dichalcogenides and other materials such as graphene have a strong potential to be the fundamental building block of many electronic and optoelectronic applications. The integration and scalable fabrication of such heterostructures are of the essence in unleashing the potential of these materials in new technologies. For the first time, we demonstrate the growth of few-layer MoS2 films on graphene via nonaqueous electrodeposition. Through methods such as scanning and transmission electron microscopy, atomic force microscopy, Raman spectroscopy, energy- and wavelength-dispersive X-ray spectroscopies, and X-ray photoelectron spectroscopy, we show that this deposition method can produce large-area MoS2 films with high quality and uniformity over graphene. We reveal the potential of these heterostructures by measuring the photoinduced current through the film. These results pave the way toward developing the electrodeposition method for the large-scale growth of heterostructures consisting of varying 2D materials for many applications.
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Affiliation(s)
- Yasir J Noori
- School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, U.K
| | - Shibin Thomas
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Sami Ramadan
- Department of Materials, Imperial College London, London SW7 2AZ, U.K
| | - Danielle E Smith
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Vicki K Greenacre
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Nema Abdelazim
- School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, U.K
| | - Yisong Han
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Richard Beanland
- Department of Physics, University of Warwick, Coventry CV4 7AL, U.K
| | - Andrew L Hector
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Norbert Klein
- Department of Materials, Imperial College London, London SW7 2AZ, U.K
| | - Gillian Reid
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Philip N Bartlett
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - C H Kees de Groot
- School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, U.K
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6
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de la Asunción-Nadal V, Jurado-Sánchez B, Vázquez L, Escarpa A. Near infrared-light responsive WS 2 microengines with high-performance electro- and photo-catalytic activities. Chem Sci 2020; 11:132-140. [PMID: 32110364 PMCID: PMC7012050 DOI: 10.1039/c9sc03156a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 10/26/2019] [Indexed: 12/12/2022] Open
Abstract
Tungsten disulfide (WS2)-based micromotors with enhanced electrochemical and photo-catalytic activities are synthesized using a greatly simplified electrochemical deposition protocol at room temperature involving exclusively tungstic acid and sulfate as metal and sulfur sources without further building chemistry. The WS2-based micromotors exhibit dual electrochemical and photo-catalytic behavior in the inner and outer layers, respectively, due to the combination of the unique properties of the sp2 hybridized WS2 outer layer with highly reactive WS2-induced inner catalytic layers, accounting for this material's exclusive enhanced performances. A rough inner Pt-Ni layer allows tailoring the micromotor propulsion, with a speed increase of up to 1.6 times after external control of the micromotor with a magnetic field due to enhanced fuel accessibility. Such a coupling of the attractive capabilities of WS2 with enhanced micromotor movement holds considerable promise to address the growing energy crisis and environmental pollution concerns.
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Affiliation(s)
- Víctor de la Asunción-Nadal
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering , University of Alcalá , Alcala de Henares , Madrid , E-28871 , Spain . ; ; Tel: +34 91 8854995
| | - Beatriz Jurado-Sánchez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering , University of Alcalá , Alcala de Henares , Madrid , E-28871 , Spain . ; ; Tel: +34 91 8854995
- Chemical Research Institute "Andrés M. del Río" , University of Alcala , Alcala de Henares , Madrid , E-28871 , Spain
| | - Luis Vázquez
- Materials Science Factory , Institute of Materials Science of Madrid (ICMM-CSIC) , Cantoblanco , E-28049 Madrid , Spain
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering , University of Alcalá , Alcala de Henares , Madrid , E-28871 , Spain . ; ; Tel: +34 91 8854995
- Chemical Research Institute "Andrés M. del Río" , University of Alcala , Alcala de Henares , Madrid , E-28871 , Spain
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7
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Bolotsky A, Butler D, Dong C, Gerace K, Glavin NR, Muratore C, Robinson JA, Ebrahimi A. Two-Dimensional Materials in Biosensing and Healthcare: From In Vitro Diagnostics to Optogenetics and Beyond. ACS NANO 2019; 13:9781-9810. [PMID: 31430131 DOI: 10.1021/acsnano.9b03632] [Citation(s) in RCA: 151] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Since the isolation of graphene in 2004, there has been an exponentially growing number of reports on layered two-dimensional (2D) materials for applications ranging from protective coatings to biochemical sensing. Due to the exceptional, and often tunable, electrical, optical, electrochemical, and physical properties of these materials, they can serve as the active sensing element or a supporting substrate for diverse healthcare applications. In this review, we provide a survey of the recent reports on the applications of 2D materials in biosensing and other emerging healthcare areas, ranging from wearable technologies to optogenetics to neural interfacing. Specifically, this review provides (i) a holistic evaluation of relevant material properties across a wide range of 2D systems, (ii) a comparison of 2D material-based biosensors to the state-of-the-art, (iii) relevant material synthesis approaches specifically reported for healthcare applications, and (iv) the technological considerations to facilitate mass production and commercialization.
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Affiliation(s)
| | | | - Chengye Dong
- State Key Lab of Electrical Insulation and Power Equipment , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , People's Republic of China
| | | | - Nicholas R Glavin
- Materials and Manufacturing Directorate , Air Force Research Laboratory , WPAFB , Ohio 45433 , United States
| | - Christopher Muratore
- Department of Chemical and Materials Engineering , University of Dayton , Dayton , Ohio 45469 , United States
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8
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Facile synthesis of molybdenum multisulfide composite nanorod arrays from single-source precursor for photoelectrochemical hydrogen generation. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-00957-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Zhang L, Wu L, Li J, Lei J. Electrodeposition of amorphous molybdenum sulfide thin film for electrochemical hydrogen evolution reaction. BMC Chem 2019; 13:88. [PMID: 31384835 PMCID: PMC6661953 DOI: 10.1186/s13065-019-0600-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 06/29/2019] [Indexed: 11/30/2022] Open
Abstract
Amorphous molybdenum sulfide (MoSx) is a highly active noble-metal-free electrocatalysts for the hydrogen evolution reaction (HER). The MoSx was prepared by electrochemical deposition at room temperature. Low-cost precursors of Mo and S were adopted to synthesize thiomolybdates solution as the electrolyte. It replaces the expensive (NH)2MoS4 and avoid the poison gas (H2S) to generate or employ. The (MoO2S2)2−, (MoOS3)2− and (MoS4)2− ions were determined by UV–VIS spectroscopy. The electrodeposition of MoSx was confirmed with XRD, XPS and SEM. The electrocatalyst activity was measured by polarization curve. The electrolyte contained (MoO2S2)2− ion and (MoOS3)2− ion electrodeposit the MoSx thin film displays a relatively high activity for HER with low overpotential of 211 mV at a current density of 10 mA cm−2, a relatively high current density of 21.03 mA cm−2 at η = 250 mV, a small Tafel slope of 55 mV dec−1. The added sodium dodecyl sulfate (SDS) can efficient improve the stability of the MoSx film catalyst.
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Affiliation(s)
- Lina Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044 People's Republic of China
| | - Liangliu Wu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044 People's Republic of China
| | - Jing Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044 People's Republic of China
| | - Jinglei Lei
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044 People's Republic of China
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10
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Chandrasekaran S, Yao L, Deng L, Bowen C, Zhang Y, Chen S, Lin Z, Peng F, Zhang P. Recent advances in metal sulfides: from controlled fabrication to electrocatalytic, photocatalytic and photoelectrochemical water splitting and beyond. Chem Soc Rev 2019; 48:4178-4280. [DOI: 10.1039/c8cs00664d] [Citation(s) in RCA: 540] [Impact Index Per Article: 108.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This review describes an in-depth overview and knowledge on the variety of synthetic strategies for forming metal sulfides and their potential use to achieve effective hydrogen generation and beyond.
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Affiliation(s)
| | - Lei Yao
- Shenzhen Key Laboratory of Special Functional Materials
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen 518060
| | - Libo Deng
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- China
| | - Chris Bowen
- Department of Mechanical Engineering
- University of Bath
- Bath
- UK
| | - Yan Zhang
- Department of Mechanical Engineering
- University of Bath
- Bath
- UK
| | - Sanming Chen
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- China
| | - Zhiqun Lin
- School of Materials Science and Engineering
- Georgia Institute of Technology
- Atlanta
- USA
| | - Feng Peng
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
| | - Peixin Zhang
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- China
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11
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Roohi H, Ghauri K, Salehi R. Non-covalent green functionalization of boron nitride nanotubes with tunable aryl alkyl ionic liquids: A quantum chemical approach. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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12
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Redman DW, Rose MJ, Stevenson KJ. Electrodeposition of Amorphous Molybdenum Chalcogenides from Ionic Liquids and Their Activity for the Hydrogen Evolution Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9354-9360. [PMID: 28591511 DOI: 10.1021/acs.langmuir.7b00821] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This work reports on the general electrodeposition mechanism of tetrachalcogenmetallates from 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. Both tetrathio- and tetraselenomolybdate underwent anodic electrodeposition and cathodic corrosion reactions as determined by UV-vis spectroelectrochemistry. Electrodeposition was carried out by cycling the potential between the anodic and cathodic regimes. This resulted in a film of densely packed nanoparticles of amorphous MoSx or MoSex as determined by SEM, Raman, and XPS. The films were shown to have high activity for the hydrogen evolution reaction. The onset potential (J = 1 mA/cm2) of the MoSx film was E = -0.208 V vs RHE, and that of MoSex was E = -0.230 V vs RHE. The Tafel slope of MoSx was 42 mV/decade, and that of MoSex was 59 mV/decade.
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Affiliation(s)
- Daniel W Redman
- Department of Chemistry, University of Texas at Austin , 105 E. 24th Street, Austin, Texas 78712, United States
| | - Michael J Rose
- Department of Chemistry, University of Texas at Austin , 105 E. 24th Street, Austin, Texas 78712, United States
| | - Keith J Stevenson
- Center for Electrochemical Energy Storage, Skolkovo Institute of Technology, Skolkovo Innovation Center , Building 3, Moscow, Russia 143026
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13
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Lertanantawong B, Hoshyargar F, O'Mullane AP. Directing Nanostructure Formation of Gold through the In Situ Underpotential Deposition of a Secondary Metal for the Detection of Nitrite Ions. ChemElectroChem 2017. [DOI: 10.1002/celc.201700707] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Benchaporn Lertanantawong
- Nanoscience and Nanotechnology Graduate Program King Mongkut's University of Technology Thonburi (KMUTT) 126 Pracha Uthit Rd. Bangmod, Tungkru, Bangkok 10140 Thailand
| | - Faegheh Hoshyargar
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) GPO Box 2434 Brisbane, QLD 4001 Australia
| | - Anthony P. O'Mullane
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) GPO Box 2434 Brisbane, QLD 4001 Australia
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14
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Mohamad Latiff N, Wang L, Mayorga-Martinez CC, Sofer Z, Fisher AC, Pumera M. Valence and oxide impurities in MoS 2 and WS 2 dramatically change their electrocatalytic activity towards proton reduction. NANOSCALE 2016; 8:16752-16760. [PMID: 27714024 DOI: 10.1039/c6nr03086f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Layered molybdenum disulfide (MoS2) and tungsten disulfide (WS2) have received renewed interest in recent years as they are catalytic towards the hydrogen evolution reaction (HER) and they are touted as future replacements of platinum in electrolyzers. There is a significant discrepancy in the found onset potentials of MoS2 and WS2 towards the hydrogen evolution reaction. Here we show that the presence of valence sulfide impurities, such as MoS3 and WS3, and their oxide counterparts, such as MoO2, MoO3 and WO2, WO3 can contribute to the catalytic activity towards hydronium reduction to hydrogen of MoS2 and WS2. Therefore, it is highly possible that the differences in the reported onset potentials and thus catalytic activities of the MoS2 and WS2 are due to the presence of catalytic impurities.
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Affiliation(s)
- Naziah Mohamad Latiff
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
| | - Lu Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
| | - Carmen C Mayorga-Martinez
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic
| | - Adrian C Fisher
- Department of Chemical Engineering and Biotechnology, University of Cambridge, UK
| | - Martin Pumera
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore.
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15
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Ahn HS, Bard AJ. Electrochemical Surface Interrogation of a MoS2 Hydrogen-Evolving Catalyst: In Situ Determination of the Surface Hydride Coverage and the Hydrogen Evolution Kinetics. J Phys Chem Lett 2016; 7:2748-2752. [PMID: 27383727 DOI: 10.1021/acs.jpclett.6b01276] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The hydrogen evolution reaction (HER) on an electrodeposited a-MoS2 electrode was investigated by a surface-selective electrochemical titration technique by application of surface interrogation scanning electrochemical microscopy. In a mildly acidic (pH 4.6) environment, the saturated surface hydride coverage of MoS2 was determined to be 31%, much higher than that expected for a crystalline nanoparticle. The HER rate constant of a surface molybdenum atom was measured for the first time in situ to be 3.8 s(-1) at a 600 mV overpotential. At high Mo-H coverages, a change in the nature of the active sites was observed upon consumption of Mo-H by HER.
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Affiliation(s)
- Hyun S Ahn
- Center for Electrochemistry, Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Allen J Bard
- Center for Electrochemistry, Department of Chemistry, The University of Texas at Austin , Austin, Texas 78712, United States
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16
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Li P, Yang Z, Shen J, Nie H, Cai Q, Li L, Ge M, Gu C, Chen X, Yang K, Zhang L, Chen Y, Huang S. Subnanometer Molybdenum Sulfide on Carbon Nanotubes as a Highly Active and Stable Electrocatalyst for Hydrogen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2016; 8:3543-3550. [PMID: 26765150 DOI: 10.1021/acsami.5b08816] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Electrochemically splitting water for hydrogen evolution reaction (HER) has been viewed as a promising approach to produce renewable and clean hydrogen energy. However, searching for cheap and efficient HER electrocatalysts to replace the currently used Pt-based catalysts remains an urgent task. Herein, we develop a one-step carbon nanotube (CNT) assisted synthesis strategy with CNTs' strong adsorbability to mediate the growth of subnanometer-sized MoS(x) on CNTs. The subnanometer MoS(x)-CNT hybrids achieve a low overpotential of 106 mV at 10 mA cm(-2), a small Tafel slope of 37 mV per decade, and an unprecedentedly high turnover frequency value of 18.84 s(-1) at η = 200 mV among all reported non-Pt catalysts in acidic conditions. The superior performance of the hybrid catalysts benefits from the presence of a higher number of active sites and the abundant exposure of unsaturated S atoms rooted in the subnanometer structure, demonstrating a new class of subnanometer-scale catalysts.
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Affiliation(s)
- Ping Li
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Zhi Yang
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Juanxia Shen
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Huagui Nie
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Qiran Cai
- ARC Centre of Excellence for Functional Nanomaterials, Institute for Frontier Materials, Deakin University , Waurn Ponds, Victoria 3216, Australia
| | - Luhua Li
- ARC Centre of Excellence for Functional Nanomaterials, Institute for Frontier Materials, Deakin University , Waurn Ponds, Victoria 3216, Australia
| | - Mengzhan Ge
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Cancan Gu
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Xi'an Chen
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Keqin Yang
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Lijie Zhang
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
| | - Ying Chen
- ARC Centre of Excellence for Functional Nanomaterials, Institute for Frontier Materials, Deakin University , Waurn Ponds, Victoria 3216, Australia
| | - Shaoming Huang
- Nanomaterials & Chemistry Key Laboratory, Wenzhou University , Wenzhou 325027, China
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17
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Wang L, Sofer Z, Luxa J, Sedmidubský D, Ambrosi A, Pumera M. Layered rhenium sulfide on free-standing three-dimensional electrodes is highly catalytic for the hydrogen evolution reaction: Experimental and theoretical study. Electrochem commun 2016. [DOI: 10.1016/j.elecom.2015.11.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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18
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Ting LRL, Deng Y, Ma L, Zhang YJ, Peterson AA, Yeo BS. Catalytic Activities of Sulfur Atoms in Amorphous Molybdenum Sulfide for the Electrochemical Hydrogen Evolution Reaction. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02369] [Citation(s) in RCA: 234] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Louisa Rui Lin Ting
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, Singapore 117574
| | - Yilin Deng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, Singapore 117574
| | - Liang Ma
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, Singapore 117574
| | - Yin-Jia Zhang
- Department of Chemistry, Brown University, 324 Brook Street, Providence, Rhode Island 02912, United States
| | - Andrew A. Peterson
- School of Engineering, Brown University, 184 Hope Street, Providence, Rhode Island 02912, United States
| | - Boon Siang Yeo
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
- Solar Energy Research Institute of Singapore, National University of Singapore, 7 Engineering Drive 1, Singapore 117574
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19
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Han GQ, Li X, Liu YR, Dong B, Hu WH, Shang X, Zhao X, Chai YM, Liu YQ, Liu CG. Controllable synthesis of three dimensional electrodeposited Co–P nanosphere arrays as efficient electrocatalysts for overall water splitting. RSC Adv 2016. [DOI: 10.1039/c6ra04478f] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel three dimensional (3D) electrodeposited Co–P nanosphere arrays on FTO (Co–P/FTO) have been successfully prepared as efficient bifunctional electrocatalysts for overall water splitting in alkaline media.
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Affiliation(s)
- Guan-Qun Han
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
- College of Science
| | - Xiao Li
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Yan-Ru Liu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Bin Dong
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
- College of Science
| | - Wen-Hui Hu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Xiao Shang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Xin Zhao
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Yong-Ming Chai
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Yun-Qi Liu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
| | - Chen-Guang Liu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (East China)
- Qingdao 266580
- PR China
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20
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Trenczek-Zajac A, Banas J, Radecka M. TiO2-based photoanodes modified with GO and MoS2 layered materials. RSC Adv 2016. [DOI: 10.1039/c6ra22979d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
MoS2/TiO2 and GO/TiO2 nanocomposites synthesized via electrodeposition (GO, MoS2) with enhanced photocurrent response.
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Affiliation(s)
- Anita Trenczek-Zajac
- AGH University of Science and Technology
- Faculty of Materials Science and Ceramics
- 30-059 Krakow
- Poland
| | - Joanna Banas
- AGH University of Science and Technology
- Faculty of Materials Science and Ceramics
- 30-059 Krakow
- Poland
| | - Marta Radecka
- AGH University of Science and Technology
- Faculty of Materials Science and Ceramics
- 30-059 Krakow
- Poland
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21
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Zhang B, Hao S, Wu J, Li X, Huang Y. Evidence of a nanosized copper anodic reaction in an anaerobic sulfide aqueous solution. RSC Adv 2016. [DOI: 10.1039/c5ra25731j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present paper reports the use of TEM to investigate the electrochemical behavior of copper subject to the both free corrosion and polarization in sulfide aqueous solution at nano scale.
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Affiliation(s)
- Bowei Zhang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Shiji Hao
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Interdisciplinary Graduate School
- Nanyang Technological University
| | - Junsheng Wu
- Institute of Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing
- China
| | - Xiaogang Li
- Institute of Advanced Materials and Technology
- University of Science and Technology Beijing
- Beijing
- China
| | - Yizhong Huang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
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22
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Baradaran Ghasemi AH, Faridi E, Ansari N, Mohseni S. Extraordinary magneto-optical Kerr effect via MoS2 monolayer in Au/Py/MoS2 plasmonic cavity. RSC Adv 2016. [DOI: 10.1039/c6ra21314f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
We demonstrate a multilayer magnetoplasmonic structure fabricated from MoS2 monolayer to significantly increase the transverse magneto-optical Kerr effect (TMOKE) with a signal Q-factor more than 600.
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Affiliation(s)
| | - E. Faridi
- Department of Physics
- Shahid Beheshti University
- Iran
| | - N. Ansari
- Department of Physics
- Alzahra University
- Iran
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23
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Narayanan S, Tong X, Thangadurai V. The synthesis and electrical properties of hybrid gel electrolytes derived from Keggin-type heteropoly acids and 3-(pyridin-1-ium-1-yl)propane-1-sulfonate (PyPs). RSC Adv 2016. [DOI: 10.1039/c6ra23082b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cyclic voltammetry of PyPs–H3PWMo at room temperature between −4 and +4 V vs. Ag/AgCl at a 10 mV s−1 scan rate and comparison of electrical conductivity of PyPs–H3PWMo with other known promising proton conductors.
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Affiliation(s)
| | - Xia Tong
- Department of Chemistry
- University of Calgary
- Calgary
- T2N 1N4 Canada
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24
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Kang D, Kim TW, Kubota SR, Cardiel AC, Cha HG, Choi KS. Electrochemical Synthesis of Photoelectrodes and Catalysts for Use in Solar Water Splitting. Chem Rev 2015; 115:12839-87. [DOI: 10.1021/acs.chemrev.5b00498] [Citation(s) in RCA: 422] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Donghyeon Kang
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Tae Woo Kim
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Stephen R. Kubota
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Allison C. Cardiel
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Hyun Gil Cha
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Kyoung-Shin Choi
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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25
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Ori G, Massobrio C, Pradel A, Ribes M, Coasne B. Structure and Dynamics of Ionic Liquids Confined in Amorphous Porous Chalcogenides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6742-6751. [PMID: 26030830 DOI: 10.1021/acs.langmuir.5b00982] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Besides the abundant literature on ionic liquids in porous silica and carbon, the confinement of such intriguing liquids in porous chalcogenides has received very little attention. Here, molecular simulation is employed to study the structural and dynamical properties of a typical ionic liquid confined in a realistic molecular model of amorphous chalcogenide with various pore sizes and surface chemistries. Using molecular dynamics in the isobaric-isothermal (NPT) ensemble, we consider confinement conditions relevant to real samples. Both the structure and self-dynamics of the confined phase are found to depend on the surface-to-volume ratio of the host confining material. Consequently, most properties of the confined ionic liquid can be written as a linear combination of surface and bulk-like contributions, arising from the ions in contact with the surface and the ions in the pore center, respectively. On the other hand, collective dynamical properties such as the ionic conductivity remain close to their bulk counterpart and almost insensitive to pore size and surface chemistry. These results, which are in fair agreement with available experimental data, provide a basis for the development of novel applications using hybrid organic-inorganic solids consisting of ionic liquids confined in porous chalcogenides.
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Affiliation(s)
- Guido Ori
- †Institut Charles Gerhardt Montpellier, CNRS-UMR 5253, ENSCM, Université Montpellier, Place Eugène Bataillon 34095 Montpellier Cedex 5, France
- ‡Multiscale Materials Science for Energy and Environment 2, UMI 3466 CNRS-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- §Institut de Physique et de Chimie des Matériaux de Strasbourg, Université de Strasbourg and CNRS UMR 7504, 23 rue du Loess, F-67034 Strasbourg Cedex 2, France
| | - Carlo Massobrio
- §Institut de Physique et de Chimie des Matériaux de Strasbourg, Université de Strasbourg and CNRS UMR 7504, 23 rue du Loess, F-67034 Strasbourg Cedex 2, France
| | - Annie Pradel
- †Institut Charles Gerhardt Montpellier, CNRS-UMR 5253, ENSCM, Université Montpellier, Place Eugène Bataillon 34095 Montpellier Cedex 5, France
| | - Michel Ribes
- †Institut Charles Gerhardt Montpellier, CNRS-UMR 5253, ENSCM, Université Montpellier, Place Eugène Bataillon 34095 Montpellier Cedex 5, France
| | - Benoit Coasne
- †Institut Charles Gerhardt Montpellier, CNRS-UMR 5253, ENSCM, Université Montpellier, Place Eugène Bataillon 34095 Montpellier Cedex 5, France
- ‡Multiscale Materials Science for Energy and Environment 2, UMI 3466 CNRS-MIT, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- ⊥Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 United States
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26
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Kang Y, Gong Y, Hu Z, Li Z, Qiu Z, Zhu X, Ajayan PM, Fang Z. Plasmonic hot electron enhanced MoS2 photocatalysis in hydrogen evolution. NANOSCALE 2015; 7:4482-8. [PMID: 25682885 DOI: 10.1039/c4nr07303g] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
With plasmonic hot electron doping, the molybdenum disulfide (MoS2) monolayer with deposited Au@Ag nanorattles effectively enhanced the hydrogen evolution reaction (HER) efficiency. The maximum photocatalysis is achieved under plasmon resonance excitation, and is actively controlled by the incident laser wavelength and power intensity. The localized phase transition of MoS2 is achieved and characterized to explicate this plasmon-enhanced hydrogen evolution. The proposed MoS2-nanoparticle composite combines surface plasmons and planar 2D materials, and pioneers a frontier field of plasmonic MoS2 photocatalysis.
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Affiliation(s)
- Yimin Kang
- State Key Lab for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China.
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27
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Well-constructed single-layer molybdenum disulfide nanorose cross-linked by three dimensional-reduced graphene oxide network for superior water splitting and lithium storage property. Sci Rep 2015; 5:8722. [PMID: 25735416 PMCID: PMC4348655 DOI: 10.1038/srep08722] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/30/2015] [Indexed: 11/08/2022] Open
Abstract
A facile one-step solution reaction route for growth of novel MoS2 nanorose cross-linked by 3D rGO network, in which the MoS2 nanorose is constructed by single-layered or few-layered MoS2 nanosheets, is presented. Due to the 3D assembled hierarchical architecture of the ultrathin MoS2 nanosheets and the interconnection of 3D rGO network, as well as the synergetic effects of MoS2 and rGO, the as-prepared MoS2-NR/rGO nanohybrids delivered high specific capacity, excellent cycling and good rate performance when evaluated as an anode material for lithium-ion batteries. Moreover, the nanohybrids also show excellent hydrogen-evolution catalytic activity and durability in an acidic medium, which is superior to MoS2 nanorose and their nanoparticles counterparts.
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28
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Abstract
This review summarizes the recent research efforts toward noble metal-free hydrogen evolution electrocatalysts.
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Affiliation(s)
- Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Yu Zhang
- Key laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Chemistry and Environment
- BeiHang University
- Beijing
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29
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Feng G, Jiang X, Qiao R, Kornyshev AA. Water in ionic liquids at electrified interfaces: the anatomy of electrosorption. ACS NANO 2014; 8:11685-94. [PMID: 25341189 DOI: 10.1021/nn505017c] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Complete removal of water from room-temperature ionic liquids is nearly impossible. For the electrochemical applications of ionic liquids, how water is distributed in the electrical double layers when the bulk liquids are not perfectly dry can potentially determine whether key advantages of ionic liquids, such as a wide electrochemical window, can be harnessed in practical systems. In this paper, we study the adsorption of water on electrode surfaces in contact with humid, imidazolium-based ionic liquids using molecular dynamics simulations. The results revealed that water molecules tend to accumulate within sub-nanometer distance from charged electrodes. At low amount of water in the bulk, the distributions of ions and of electrostatic potential in the double layer are affected weakly by the presence of water, but the spatial distribution of water molecules is strongly dependent on both. The preferential positions of water molecules in double layers are determined by the balance of several factors: the tendency to follow the positions of the maximal absolute value of the electrical field, the association with their ionic surroundings, and the propensity to settle at positions where more free space is available. The balance between these factors changes with charging the electrode, but the adsorption of water generally increases with voltage. The ion specificity of water electrosorption is manifested in the stronger presence of water near positive electrodes (where anions are the counterions) than near negative electrodes (where cations are counterions). These predictions await experimental verification.
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Affiliation(s)
- Guang Feng
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology (HUST) , Wuhan 430074, China
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30
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Yang S, Slotcavage D, Mai JD, Guo F, Li S, Zhao Y, Lei Y, Cameron CE, Huang TJ. Electrochemically Created Highly Surface Roughened Ag Nanoplate Arrays for SERS Biosensing Applications. JOURNAL OF MATERIALS CHEMISTRY. C 2014; 2:8350-8356. [PMID: 25383191 PMCID: PMC4217216 DOI: 10.1039/c4tc01276c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Highly surface-roughened Ag nanoplate arrays are fabricated using a simple electrodeposition and in situ electrocorrosion method with inorganic borate ions as capping agent. The electrocorrosion process is induced by a change in the local pH value during the electrochemical growth, which is used to intentionally carve the electrodeposited structures. The three dimensionally arranged Ag nanoplates are integrated with substantial surface-enhanced Raman scattering (SERS) hot spots and are free of organic contaminations widely used as shaping agents in previous works, making them excellent candidate substrates for SERS biosensing applications. The SERS enhancement factor of the rough Ag nanoplates is estimated to be > 109. These Ag nanoplate arrays are used for SERS-based analysis of DNA hybridization monitoring, protein detection, and virus differentiation without any additional surface modifications or labelling. They all exhibit an extremely high detection sensitivity, reliability, and reproducibility.
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Affiliation(s)
- Shikuan Yang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802-6812, USA
| | - Daniel Slotcavage
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802-6812, USA
| | - John D. Mai
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Feng Guo
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802-6812, USA
| | - Sixing Li
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802-6812, USA
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yanhui Zhao
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802-6812, USA
| | - Yong Lei
- Center for Innovation Competence & Institute for Physics, Technical University of Ilmenau, 98693 Ilmenau, Germany
| | - Craig E. Cameron
- Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA
| | - Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802-6812, USA
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31
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Kang Y, Najmaei S, Liu Z, Bao Y, Wang Y, Zhu X, Halas NJ, Nordlander P, Ajayan PM, Lou J, Fang Z. Plasmonic hot electron induced structural phase transition in a MoS2 monolayer. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:6467-71. [PMID: 25100132 DOI: 10.1002/adma.201401802] [Citation(s) in RCA: 268] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 06/17/2014] [Indexed: 05/21/2023]
Abstract
A reversible 2H-to-1T phase transition in a MoS2 monolayer is realized by plasmonic hot electrons. This transition can be actively controlled by the incident light intensity, wavelength, sample areas, and perimeters, resulting in an effective shift of photoluminescence. The suggested configuration paves the way for plasmonic optoelectronic device applications of MoS2 in the future.
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Affiliation(s)
- Yimin Kang
- School of Physics, State Key Lab for Mesoscopic Physics, Peking University and Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China
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32
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Highly porous Ag-Ag 2 S/MoS 2 with additional active sites synthesized by chemical etching method for enhanced electrocatalytic hydrogen evolution. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.129] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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33
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Saadi FH, Carim AI, Velazquez JM, Baricuatro JH, McCrory CCL, Soriaga MP, Lewis NS. Operando Synthesis of Macroporous Molybdenum Diselenide Films for Electrocatalysis of the Hydrogen-Evolution Reaction. ACS Catal 2014. [DOI: 10.1021/cs500412u] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | | | | | - Manuel P. Soriaga
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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34
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Ko YN, Kang YC, Park SB. Superior electrochemical properties of MoS2 powders with a MoS2@void@MoS2 configuration. NANOSCALE 2014; 6:4508-4512. [PMID: 24652333 DOI: 10.1039/c4nr00064a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Yolk-shell MoS2 powders with a distinct configuration of MoS2@void@MoS2 were prepared for the first time by applying spray pyrolysis. The yolk-shell MoO3 powders prepared by spray pyrolysis were converted into MoS2 powders by a simple sulfidation process at 400 °C without altering the morphology. Dense structured MoS2 powders were also prepared by a similar process. The respective initial discharge capacities of the yolk-shell and dense structured MoS2 powders at a current density of 1000 mA g(-1) were 651 and 490 mA h g(-1), and the corresponding capacity retentions after 100 cycles measured from the second cycle were 100 and 72%.
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Affiliation(s)
- Y N Ko
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea.
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35
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Najdovski I, O’Mullane AP. The effect of electrode material on the electrochemical formation of porous copper surfaces using hydrogen bubble templating. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.03.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Yan Y, Xia B, Xu Z, Wang X. Recent Development of Molybdenum Sulfides as Advanced Electrocatalysts for Hydrogen Evolution Reaction. ACS Catal 2014. [DOI: 10.1021/cs500070x] [Citation(s) in RCA: 695] [Impact Index Per Article: 69.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ya Yan
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - BaoYu Xia
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Zhichuan Xu
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Xin Wang
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
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