1
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Phan HH, Bell JG, Mutch GA, McCue AJ, Phan AN, Thomas KM. Spectroelectrochemical study of carbon structural and functionality characteristics on vanadium redox reactions for flow batteries. MATERIALS ADVANCES 2024:d4ma00675e. [PMID: 39156594 PMCID: PMC11325216 DOI: 10.1039/d4ma00675e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Accepted: 08/01/2024] [Indexed: 08/20/2024]
Abstract
Vanadium redox flow batteries have applications for large-scale electricity storage. This paper reports the influence of carbon structural characteristics of sustainable walnut shell-derived carbons in carbon/polyvinylidene fluoride composite electrodes on vanadium redox reactions. Pyrolysis, gasification, and chemical treatment procedures were used to modify the structural characteristics of carbons. Carbon functional groups were modified by chemical treatment with HNO3, heat treatment with K2CO3, and high-temperature NH3 treatment. Carbon porous structures were characterized using gas adsorption studies. Raman spectroscopy and X-ray diffraction were used to characterize the carbon molecular structure. Functional groups were characterized using X-ray photoelectron spectroscopy, acid/base titrations, temperature-programmed desorption, and Fourier transform infrared spectroscopy. The influence of carbon structure, porosity, and surface functional groups on the redox reactions of vanadium was investigated using cyclic voltammetry and electrical impedance spectroscopy. The VO2+/VO2 + and V2+/V3+ couples had well-defined peaks in cyclic voltammetry, with the former being the most intense, but the V3+/VO2+ couple was not observed for samples carbonized under nitrogen. The results show that V2+/V3+ and VO2+/VO2 + couples observed in cyclic voltammograms were enhanced for carbonization temperatures up to 800 °C. Electrical impedance spectroscopy also showed impedance trends. The electrochemistry results are primarily related to changes in carbon structure and the catalysis of V3+ oxidation by surface functional groups in the carbon structure. The V3+/VO2+ couple was limited by slow kinetics, but it occurs on specific oxygen and nitrogen sites in the carbon structure. The oxidation of V(iii) to V(iv) only occurs on a limited number of surface sites, and the outer-sphere electron transfer to oxidize V(iii) takes place at much more positive potentials. The coulombic, voltage, and energy efficiency of the carbon electrodes were suitable for batteries.
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Affiliation(s)
- Ha H Phan
- Wolfson Northern Carbon Reduction Laboratories, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
| | - Jon G Bell
- Wolfson Northern Carbon Reduction Laboratories, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
| | - Greg A Mutch
- School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
| | - Alan J McCue
- School of Chemistry, University of Aberdeen Aberdeen AB24 3UE UK
| | - Anh N Phan
- Wolfson Northern Carbon Reduction Laboratories, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
| | - K Mark Thomas
- Wolfson Northern Carbon Reduction Laboratories, School of Engineering, Newcastle University Newcastle upon Tyne NE1 7RU UK
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Swaby S, Monzón D, Ureña N, Vivo Vilches J, Sanchez JY, Iojoiu C, Várez A, Pérez-Prior MT, Levenfeld B. Block Copolymer-Based Membranes for Vanadium Redox Flow Batteries: Synthesis, Characterization, and Performance. ACS APPLIED POLYMER MATERIALS 2024; 6:8966-8976. [PMID: 39144278 PMCID: PMC11320381 DOI: 10.1021/acsapm.4c01262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 07/14/2024] [Accepted: 07/14/2024] [Indexed: 08/16/2024]
Abstract
Nonfluorinated polymers have been widely proposed to replace Nafion as raw materials for redox flow battery ion-exchange membranes. Hereby, block copolymers based on polysulfone (PSU) and polyphenylsulfone (PPSU) are synthesized and employed as precursors of membranes for vanadium redox flow batteries. A series of copolymers with varying molar proportions of PSU (75/25, 60/40, 50/50 mol %) were prepared. The 60/40 and 75/25 copolymers exhibit concentrated sulfonic groups predominantly in the PSU unit, favoring the formation of hydrophobic and hydrophilic domains. The 50/50 copolymer presents a balanced degree of sulfonation between the two units, leading to a homogeneous distribution of sulfonic groups. An ex situ study of these materials comprising vanadium ion permeability and chemical and mechanical stability was performed. The best performance is achieved with 50/50 membranes, which exhibited performance comparable to commercial Nafion membranes. These results signify a promising breakthrough in the pursuit of high-performance, sustainable membranes for next-generation VRFBs.
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Affiliation(s)
- Sydonne Swaby
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
| | - Diego Monzón
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
| | - Nieves Ureña
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
| | - José Vivo Vilches
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
| | - Jean-Yves Sanchez
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
- LEPMI, University Grenoble Alpes, 38000 Grenoble, France
- CNRS,
LEPMI, 38000 Grenoble, France
| | - Cristina Iojoiu
- LEPMI, University Grenoble Alpes, 38000 Grenoble, France
- CNRS,
LEPMI, 38000 Grenoble, France
| | - Alejandro Várez
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
| | - María Teresa Pérez-Prior
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
| | - Belén Levenfeld
- Departamento
de Ciencia e Ingeniería de Materiales e Ingeniería Química,
IAAB, Universidad Carlos III de Madrid, Avda. Universidad, 30, 28911 Leganés, Madrid, Spain
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3
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Rokade A, Rahane GK, Živković A, Rahane SN, Tarkas HS, Hareesh K, de Leeuw NH, Sartale SD, Dzade NY, Jadkar SR, Rondiya SR. Fabrication of ZnO Scaffolded CdS Nanostructured Photoanodes with Enhanced Photoelectrochemical Water Splitting Activity under Visible Light. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6884-6897. [PMID: 38517367 DOI: 10.1021/acs.langmuir.3c03817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
CdS, characterized by its comparatively narrow energy band gap (∼2.4 eV), is an appropriate material for prospective use as a photoanode in photoelectrochemical water splitting. Regrettably, it encounters several obstacles for practical and large-scale applications, including issues such as bulk carrier recombination and diminished conductivity. Here, we have tried to address these challenges by fabricating a novel photoelectrode (ZnO/CdS) composed of one-dimensional ZnO nanorods (NRs) decorated with two-dimensional CdS nanosheets (NSs). A facile two-step chemical method comprising electrodeposition along with chemical bath deposition is employed to synthesize the ZnO NRs, CdS NSs, and ZnO/CdS nanostructures. The prepared nanostructures have been investigated by UV-visible absorption spectroscopy, X-ray diffraction, Raman spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy. The fabricated ZnO/CdS nanostructures have shown enhanced photoelectrochemical properties due to the improvement of the semiconductor junction surface area and thereby enhanced visible light absorption. The incorporation of CdS NSs has been further found to promote the rate of the charge separation and transfer process. Subsequently, the fabricated ZnO/CdS photoelectrodes achieved a photocurrent conversion efficiency 3 times higher than that of a planar ZnO NR photoanode and showed excellent performance under visible light irradiation. The highest applied bias photon-to-current conversion efficiency (% ABPE) of about ∼0.63% has been obtained for the sample with thicker CdS NSs on ZnO NRs with a photocurrent density of ∼1.87 mA/cm2 under AM 1.5 G illumination. The newly synthesized nanostructures further demonstrate that the full photovoltaic capacity of nanomaterials is yet to be exhausted.
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Affiliation(s)
- Avinash Rokade
- Department of Physics, Savitribai Phule Pune University, Pune 411007, India
| | - Ganesh K Rahane
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Aleksandar Živković
- Department of Earth Sciences, Utrecht University, Princetonlaan 8a, Utrecht 3548CB, The Netherlands
| | - Swati N Rahane
- Department of Physics, Savitribai Phule Pune University, Pune 411007, India
| | - Hemant S Tarkas
- Department of Physics, Savitribai Phule Pune University, Pune 411007, India
| | - K Hareesh
- Department of Physics, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal 576104, India
| | - Nora H de Leeuw
- Department of Earth Sciences, Utrecht University, Princetonlaan 8a, Utrecht 3548CB, The Netherlands
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | | | - Nelson Y Dzade
- Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Sandesh R Jadkar
- Department of Physics, Savitribai Phule Pune University, Pune 411007, India
| | - Sachin R Rondiya
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
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Shams M, Niazi Z, Saeb MR, Mozaffari Moghadam S, Mohammadi AA, Fattahi M. Tailoring the topology of ZIF-67 metal-organic frameworks (MOFs) adsorbents to capture humic acids. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 269:115854. [PMID: 38154210 DOI: 10.1016/j.ecoenv.2023.115854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/02/2023] [Accepted: 12/15/2023] [Indexed: 12/30/2023]
Abstract
Chlorination is a versatile technique to combat water-borne pathogens. Over the last years, there has been continued research interest to abate the formation of chlorinated disinfection by-products (DBPs). To prevent hazardous DBPs in drinking water, it is decided to diminish organic precursors, among which humic acids (HA) resulting from the decomposition and transformation of biomass. Metal-organic frameworks (MOFs) such as zeolitic imidazolate frameworks (ZIFs) have recently received tremendous attention in water purification. Herein, customized ZIF-67 MOFs possessing various physicochemical properties were prepared by changing the cobalt source. The HA removal by ZIF-67-Cl, ZIF-67-OAc, ZIF-67-NO3, and ZIF-67-SO4 were 85.6%, 68.9%, 86.1%, and 87.4%, respectively, evidently affected by the specific surface area. HA uptake by ZIF-67-SO4 indicated a removal efficiency beyond 90% in 4 90% after 60 min mixing the solution with 0.3 g L-1 ZIF-67-SO4. Notably, an acceptable removal performance (∼72.3%) was obtained even at HA concentrations up to 100 mg L-1. The equilibrium data fitted well with the isotherm models in the order of Langmuir> Hill > BET> Khan > Redlich-Peterson> Jovanovic> Freundlich > and Temkin. The maximum adsorption capacity qm for HA uptake by ZIF-67-SO4 was 175.89 mg g-1, well above the majority of adsorbents. The pseudo-first-order model described the rate of HA adsorption by time. In conclusion, ZIF-67-SO4 presented promising adsorptive properties against HA. Further studies would be needed to minimize cobalt leaching from the ZIF-67-SO4 structure and improve its reusability safely, to ensure its effectiveness and the economy of adsorption system.
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Affiliation(s)
- Mahmoud Shams
- Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zohreh Niazi
- Chemistry Department, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammad Reza Saeb
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, J. Hallera 107, 80-416 Gdańsk, Poland
| | - Sina Mozaffari Moghadam
- Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Akbar Mohammadi
- Department of Environmental Health Engineering, School of Public Health, Neyshabur University of Medical Sciences, Neyshabur, Iran.
| | - Mehdi Fattahi
- Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam; School of Engineering &Technology, Duy Tan University, Da Nang, Viet Nam.
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Cheng YH, Chande C, Li Z, Haridas Menon N, Kaaliveetil S, Basuray S. Optimization of Electrolytes with Redox Reagents to Improve the Impedimetric Signal for Use with a Low-Cost Analyzer. BIOSENSORS 2023; 13:999. [PMID: 38131759 PMCID: PMC10741443 DOI: 10.3390/bios13120999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/10/2023] [Accepted: 11/24/2023] [Indexed: 12/23/2023]
Abstract
The most well-known criterion for POC devices is ASSURED, and affordability, i.e., using low-cost instrumentation, is the most challenging one. This manuscript provides a pathway for transitioning ESSENCE, an impedance-based biosensor platform, from using an expensive benchtop analyzer-KeySight 4294A (~$50k)-to using a significantly portable and cheaper USB oscilloscope-Analog Discovery 2 (~$200) -with similar sensitivity (around 100 times price difference). To achieve this, we carried out a fundamental study of the interplay between an electrolyte like potassium chloride (KCl), and an electrolyte buffer like phosphate buffered saline (PBS) in the presence and absence of a redox buffer like ferro/ferricyanide system and ([Ru(bpy)3]2+). Redox molecules in the electrolyte caused a significant change in the Nyquist curve of the impedance depending on the redox molecule type. The redox species and the background electrolyte have their own RC semicircles in the Nyquist curve, whose overlap depends on the redox concentration and electrolyte ionic strength. We found that by increasing the electrolyte ionic strength or the redox concentration, the RC semicircle moves to higher frequencies and vice versa. Importantly, the use of the buffer electrolyte, instead of KCl, led to a lower standard deviation and overall signal (lesser sensitivity). However, to achieve the best results from the biorecognition signal, we chose a buffered electrolyte like PBS with high ionic strength and lowered the redox probe concentrations to minimize the standard deviation and reduce any noise from migrating to the low-cost analyzer. Comparing the two analyzers shows similar results, with a lowered detection limit from the low-cost analyzer.
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Affiliation(s)
| | | | | | | | | | - Sagnik Basuray
- Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, 323 Dr Martin Luther King Jr Blvd, Newark, NJ 07102, USA
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6
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Selim AA, Abdallah AB, Awad FS, Khalifa ME, Salem Molouk AF. Electrochemical sensor based on amine- and thiol-modified multi-walled carbon nanotubes for sensitive and selective determination of uranyl ions in real water samples. RSC Adv 2023; 13:31141-31150. [PMID: 37881759 PMCID: PMC10594082 DOI: 10.1039/d3ra05374a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/12/2023] [Indexed: 10/27/2023] Open
Abstract
Novel selective and sensitive electrochemical sensors based on the modification of a carbon paste electrode (CPE) with novel amine- and thiol-functionalized multi-walled carbon nanotubes (MWCNT) have been developed for the detection and monitoring of uranyl ions in different real water samples. Multiwalled carbon nanotubes were grafted with 2-aminothiazole (AT/MWCNT) and melamine thiourea (MT/MWCNT) via an amidation reaction in the presence of dicyclohexyl carbodiimide (DCC) as a coupling agent. This modification for multiwalled carbon nanotubes has never been reported before. The amine and thiol groups were considered to be promising functional groups due to their high affinity toward coordination with uranyl ions. The modified multi-walled carbon nanotubes were characterized using different analytical techniques including FTIR, SEM, XPS, and elemental analysis. Subsequently, 10 wt% MT/MWCNT was mixed with 60 wt% graphite powder in the presence of 30 wt% paraffin oil to obtain a modified carbon paste electrode (MT/MWCNT/CPE). The electrochemical behavior and applications of the prepared sensors were examined using cyclic voltammetry, differential pulse anodic stripping voltammetry, and electrochemical impedance spectroscopy. The MT/MWCNT/CPE sensor exhibited a good linearity for UO22+ in the concentration range of 5.0 × 10-3 to 1.0 × 10-10 mol L-1 with low limits of detection (LOD = 2.1 × 10-11 mol L-1) and quantification (LOQ = 7 × 10-11 mol L-1). In addition, high precision (RSD = 2.7%), good reproducibility (RSD = 2.1%), and high stability (six weeks) were displayed. Finally, MT-MWCNT@CPE was successfully utilized to measure the uranyl ions in an actual water sample with excellent recoveries (97.8-99.3%). These results demonstrate that MT-MWCNT@CPE possesses appropriate accuracy and is appropriate for environmental applications.
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Affiliation(s)
- Amina A Selim
- Chemistry Department, Faculty of Science, Mansoura University Mansoura 35516 Egypt +201000166374 +201090433272
| | - A B Abdallah
- Chemistry Department, Faculty of Science, Mansoura University Mansoura 35516 Egypt +201000166374 +201090433272
- Chemistry Department, Faculty of Science, New Mansoura University New Mansoura City Egypt
| | - Fathi S Awad
- Chemistry Department, Faculty of Science, Mansoura University Mansoura 35516 Egypt +201000166374 +201090433272
- Chemistry Department, Faculty of Science, New Mansoura University New Mansoura City Egypt
| | - Magdi E Khalifa
- Chemistry Department, Faculty of Science, Mansoura University Mansoura 35516 Egypt +201000166374 +201090433272
| | - Ahmed Fathi Salem Molouk
- Chemistry Department, Faculty of Science, Mansoura University Mansoura 35516 Egypt +201000166374 +201090433272
- Chemistry Department, Faculty of Science, New Mansoura University New Mansoura City Egypt
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Das R, Choudhury D, Maurya R, Sharma S, Neergat M. Influence of Nitrogen Doping into Carbon on the Activation Barrier of ORR in Alkaline Medium: An Investigation Based on Eyring Analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:4351-4361. [PMID: 36933231 DOI: 10.1021/acs.langmuir.2c03359] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The oxygen reduction reaction (ORR) is investigated on metal-free carbon (Vulcan XC-72) and nitrogen-doped (∼≤1%) carbon (N/C-900) in 0.1 M KOH. The product distribution (O2 to OH- and HO2-) as a function of overpotential (η) in the temperature range of 293-323 K is analyzed using a rotating ring-disk electrode (RRDE) assembly. The kinetic current due to reduction of O2 to HO2- is estimated and used in the Eyring analysis to determine the change in enthalpy of activation (ΔH#). It is shown that doping of carbon with nitrogen (even with ≤1 wt %) causes substantial increase in the number of active sites (almost 2-fold) and reduction in ΔH# at any η. Moreover, ΔH# is a stronger function of η on N/C-900 as compared to that on the carbon surface.
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Affiliation(s)
- Rubul Das
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debittree Choudhury
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Rajan Maurya
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Shreya Sharma
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Manoj Neergat
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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8
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Vyas V, Kotla NG, Rochev Y, Poudel A, Biggs M. Multifrequency dielectric mapping of fixed mice colon tissues in cell culture media via scanning electrochemical microscopy. Front Bioeng Biotechnol 2023; 11:1063063. [PMID: 36845172 PMCID: PMC9947134 DOI: 10.3389/fbioe.2023.1063063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/19/2023] [Indexed: 02/11/2023] Open
Abstract
Alternating current scanning electrochemical microscopy (AC-SECM) is a powerful tool for characterizing the electrochemical reactivity of surfaces. Here, perturbation in the sample is induced by the alternating current and altered local potential is measured by the SECM probe. This technique has been used to investigate many exotic a range of biological interfaces including live cells and tissues, as well as the corrosive degradation of various metallic surfaces, etc. In principle, AC-SECM imaging is derived from electrochemical impedance spectroscopy (EIS) which has been used for a century to describe interfacial and diffusive behaviour of molecules in solution or on a surface. Increasingly bioimpedance centric medical devices have become an important tool to detect evolution of tissue biochemistry. Predictive implications of measuring electrochemical changes within a tissue is one of the core concepts in developing minimally invasive and smart medical devices. In this study, cross sections of mice colon tissue were used for AC-SECM imaging. A 10 micron sized platinum probe was used for two-dimensional (2D) tan δ mapping of histological sections at a frequency of 10 kHz, Thereafter, multifrequency scans were performed at 100 Hz, 10 kHz, 300 kHz, and 900 kHz. Loss tangent (tan δ) mapping of mice colon revealed microscale regions within a tissue possessing a discrete tan δ signature. This tan δ map may be an immediate measure of physiological conditions in biological tissues. Multifrequency scans highlight subtle changes in protein or lipid composition as a function of frequency which was recorded as loss tangent maps. Impedance profile at different frequencies could also be used to identify optimal contrast for imaging and extracting the electrochemical signature specific for a tissue and its electrolyte.
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Affiliation(s)
- Varun Vyas
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland,CNRS, LIEC, Université de Lorraine, Nancy, France,*Correspondence: Varun Vyas, ; Manus Biggs,
| | - Niranjan G. Kotla
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland
| | - Yury Rochev
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland
| | - Anup Poudel
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland
| | - Manus Biggs
- CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway, Ireland,*Correspondence: Varun Vyas, ; Manus Biggs,
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9
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Pulsed laser deposited V2O3 thin-films on graphene/aluminum foil for micro-battery applications. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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10
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Loktionov P, Pichugov R, Konev D, Petrov M, Pustovalova A, Antipov A. Operando UV/Vis spectra deconvolution for comprehensive electrolytes analysis of vanadium redox flow battery. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Aguiló-Aguayo N, Drozdzik T, Bechtold T. Impedance analysis of electrodes made of continuous carbon filaments in a 20 cm2 redox flow cell. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Reduction of VO2+ in electrolysis cell combined with chemical regeneration of oxidized VO2+ electrolyte for operando capacity recovery of vanadium redox flow battery. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Tripathi AK, Priyadarshani D, Joy ME, Maurya R, Neergat M. The impact of overpotential on the enthalpy of activation and pre-exponential factor of electrochemical redox reactions. Phys Chem Chem Phys 2022; 24:16031-16040. [PMID: 35730802 DOI: 10.1039/d2cp00404f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of the V5+/V4+ redox reaction is investigated in a three-electrode configuration on a Vulcan XC-72 modified glassy carbon rotating disk electrode at four different temperatures (25 to 40 °C, with 5 °C interval). The values of enthalpy of activation (ΔH#) and pre-exponential factor (Af) estimated using the Eyring equation are in the range of 0.25-0.53 eV (24-51 kJ mol-1) and -1.3 to 5, respectively. The Eyring plots tend to diverge with overpotential, causing an increase in the values of the estimated ΔH# and Af. This is perhaps due to the retarding effect of the precipitates/adsorbates on the electrode surface. The investigation of the kinetics suggests that the V5+/V4+ redox reaction is electrocatalysed through an increase in the entropy of activation (ΔS#).
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Affiliation(s)
- Anand Kumar Tripathi
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Divya Priyadarshani
- Centre for Research in Nanotechnology & Science, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Miji E Joy
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Rajan Maurya
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Manoj Neergat
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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14
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Abstract
Interpretation of impedance spectroscopy data requires both a description of the chemistry and physics that govern the system and an assessment of the error structure of the measurement. The approach presented here includes use of graphical methods to guide model development, use of a measurement model analysis to assess the presence of stochastic and bias errors, and a systematic development of interpretation models in terms of the proposed reaction mechanism and physical description. Application to corrosion, batteries, and biological systems is discussed, and emerging trends in interpretation and implementation of impedance spectroscopy are presented.
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Affiliation(s)
- Vincent Vivier
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, 4 place Jussieu, Paris 75005 Cedex 05, France
| | - Mark E Orazem
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
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Kongkaew S, Meng L, Limbut W, Kanatharana P, Thavarungkul P, Mak WC. Evaluation on the Intrinsic Physicoelectrochemical Attributes and Engineering of Micro-, Nano-, and 2D-Structured Allotropic Carbon-Based Papers for Flexible Electronics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14302-14313. [PMID: 34859679 PMCID: PMC8675137 DOI: 10.1021/acs.langmuir.1c02121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 11/18/2021] [Indexed: 05/14/2023]
Abstract
Flexible electronics have gained more attention for emerging electronic devices such as sensors, biosensors, and batteries with advantageous properties including being thin, lightweight, flexible, and low-cost. The development of various forms of allotropic carbon papers provided a new dry-manufacturing route for the fabrication of flexible and wearable electronics, while the electrochemical performance and the bending stability are largely influenced by the bulk morphology and the micro-/nanostructured domains of the carbon papers. Here, we evaluate systematically the intrinsic physicoelectrochemical properties of allotropic carbon-based conducting papers as flexible electrodes including carbon-nanotubes-paper (CNTs-paper), graphene-paper (GR-paper), and carbon-fiber-paper (CF-paper), followed by functionalization of the allotropic carbon papers for the fabrication of flexible electrodes. The morphology, chemical structure, and defects originating from the allotropic nanostructured carbon materials were characterized by scanning electron microscopy (SEM) and Raman spectroscopy, followed by evaluating the electrochemical performance of the corresponding flexible electrodes by cyclic voltammetry and electrochemical impedance spectroscopy. The electron-transfer rate constants of the CNTs-paper and GR-paper electrodes were ∼14 times higher compared with the CF-paper electrode. The CNTs-paper and GR-paper electrodes composed of nanostructured carbon showed significantly higher bending stabilities of 5.61 and 4.96 times compared with the CF-paper. The carbon-paper flexible electrodes were further functionalized with an inorganic catalyst, Prussian blue (PB), forming the PB-carbon-paper catalytic electrode and an organic conducting polymer, poly(3,4-ethylenedioxythiophene) (PEDOT), forming the PEDOT-carbon-paper capacitive electrode. The intrinsic attribute of different allotropic carbon electrodes affects the deposition of PB and PEDOT, leading to different electrocatalytic and capacitive performances. These findings are insightful for the future development and fabrication of advanced flexible electronics with allotropic carbon papers.
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Affiliation(s)
- Supatinee Kongkaew
- Biosensors
and Bioelectronics Centre, Division of Sensor and Actuator Systems,
Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
- Center
of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center
of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division
of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Lingyin Meng
- Biosensors
and Bioelectronics Centre, Division of Sensor and Actuator Systems,
Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - Warakorn Limbut
- Center
of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center
of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division
of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Proespichaya Kanatharana
- Center
of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center
of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division
of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Panote Thavarungkul
- Center
of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center
of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division
of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Wing Cheung Mak
- Biosensors
and Bioelectronics Centre, Division of Sensor and Actuator Systems,
Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
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