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Rodríguez O, Denuault G. The Influence of the Oxygen Reduction Reaction (ORR) on Pt Oxide Electrochemistry. ChemElectroChem 2021. [DOI: 10.1002/celc.202100710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Oliver Rodríguez
- Chemistry University of Southampton Southampton SO17 1BJ UK
- Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana IL 61801 United States
| | - Guy Denuault
- Chemistry University of Southampton Southampton SO17 1BJ UK
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2
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Hydroxide ion oxidation using low-symmetry mesoporous titanium dioxide (lsm-TiO2) electrode. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Irkham I, Einaga Y. Oxidation of hydroxide ions in weak basic solutions using boron-doped diamond electrodes: effect of the buffer capacity. Analyst 2019; 144:4499-4504. [DOI: 10.1039/c9an00505f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrochemical oxidation of hydroxide ions using boron-doped diamond (BDD) electrodes in weak basic solutions was examined.
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Affiliation(s)
- Irkham Irkham
- Department of Chemistry
- Keio University
- Yokohama 223-8522
- Japan
| | - Yasuaki Einaga
- Department of Chemistry
- Keio University
- Yokohama 223-8522
- Japan
- JST-ACCEL
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4
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Kuwar A, Tayade K, Keshav K, Sahoo SK, Mayank, Singh N. Cu 2+-driven metallo-supramolecular self-assembly and its application in sensing of hydroxyl ion. Supramol Chem 2018. [DOI: 10.1080/10610278.2017.1357817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Anil Kuwar
- School of Chemical Sciences, North Maharashtra University, Jalgaon, India
| | - Kundan Tayade
- School of Chemical Sciences, North Maharashtra University, Jalgaon, India
| | - Karunesh Keshav
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Suban K. Sahoo
- Department of Applied Chemistry, SV National Institute of Technology, Surat, India
| | - Mayank
- Department of Chemistry, Indian Institute of Technology, Ropar, Rupnagar, India
| | - Narinder Singh
- Department of Chemistry, Indian Institute of Technology, Ropar, Rupnagar, India
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5
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Irkham, Watanabe T, Einaga Y. Hydroxide Ion Oxidation in Aqueous Solutions Using Boron-Doped Diamond Electrodes. Anal Chem 2017. [DOI: 10.1021/acs.analchem.7b01102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Irkham
- Department
of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - Takeshi Watanabe
- Department
of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - Yasuaki Einaga
- Department
of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
- JST-ACCEL, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
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6
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In situ videometry monitoring of bubble behavior during the electrocatalytic oxygen evolution reaction. REACTION KINETICS MECHANISMS AND CATALYSIS 2015. [DOI: 10.1007/s11144-014-0819-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Thakur N, Kumar SA, Pandey AK, Kumar SD, Reddy AVR. Optode sensor for on-site detection and quantification of hydroxide ions in highly concentrated alkali solutions. RSC Adv 2015. [DOI: 10.1039/c5ra11983a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Development of a colorimetric strip sensor for visual detection and quantification of hydroxide ions in highly concentrated alkali solutions.
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Affiliation(s)
- Neha Thakur
- Analytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Sanjukta A. Kumar
- Analytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Ashok K. Pandey
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Sangita D. Kumar
- Analytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - A. V. R. Reddy
- Analytical Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
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8
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Aguilar-Vargas V, S. Valente J, González I. Electrochemical characterization of carbon paste electrodes modified with MgZnGa and ZnGaAl hydrotalcite-like compounds. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2222-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Doménech A, Montoya N, Alarcón J. Study of solid state kinetics using voltammetry of immobilized particles. Application to tetragonal to monoclinic transition in nanoparticulate zirconia and praseodymia-doped zirconia. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.01.103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Switching between voltammetry and potentiometry in order to determine H+ or OH− ion concentration over the entire pH scale by means of tungsten disk electrode. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2011.11.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Tuvić T, Pašti I, Mentus SV. A rotating tungsten disc electrode in concentrated strong alkaline solutions: An electroanalytical aspect. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.01.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Denuault G. The Contribution of Microelectrodes to Electroanalytical Chemistry: From Reaction Mechanisms and Scanning Electrochemical Microscopy to Ocean Sensors. Isr J Chem 2010. [DOI: 10.1002/ijch.201000041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Hlushkou D, Perdue RK, Dhopeshwarkar R, Crooks RM, Tallarek U. Electric field gradient focusing in microchannels with embedded bipolar electrode. LAB ON A CHIP 2009; 9:1903-1913. [PMID: 19532966 DOI: 10.1039/b822404h] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The complex interplay of electrophoretic, electroosmotic, bulk convective, and diffusive mass/charge transport in a hybrid poly(dimethylsiloxane) (PDMS)/glass microchannel with embedded floating electrode is analyzed. The thin floating electrode attached locally to the wall of the straight microchannel results in a redistribution of local field strength after the application of an external electric field. Together with bulk convection based on cathodic electroosmotic flow, an extended field gradient is formed in the anodic microchannel segment. It imparts a spatially dependent electrophoretic force on charged analytes and, in combination with the bulk convection, results in an electric field gradient focusing at analyte-specific positions. Analyte concentration in the enriched zone approaches a maximum value which is independent of its concentration in the supplying reservoirs. A simple approach is shown to unify the temporal behavior of the concentration factors under general conditions.
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Affiliation(s)
- Dzmitry Hlushkou
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032, Marburg, Germany
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He W, Silvester DS, Streeter I, Aldous L, Hardacre C, Compton RG. Measuring the solubility of benzoic acid in room temperature ionic liquids using chronoamperometric techniques. J PHYS ORG CHEM 2009. [DOI: 10.1002/poc.1428] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Abu-Rabi A, Jašin D, Mentus S. The influence of cathodic pretreatment on the kinetics of hydroxide ion oxidation on polycrystalline gold electrode. J Electroanal Chem (Lausanne) 2007. [DOI: 10.1016/j.jelechem.2006.09.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Imokawa T, Williams KJ, Denuault G. Fabrication and Characterization of Nanostructured Pd Hydride pH Microelectrodes. Anal Chem 2005; 78:265-71. [PMID: 16383336 DOI: 10.1021/ac051328j] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel pH microsensors were made by electrodepositing mesoporous Pd films onto Pt microdisks, electrochemically loading the films with hydrogen to form the alpha+beta Pd hydride phase, and then switching to the potentiometric mode to monitor pH. To create a nanostructure, the films were deposited within a molecular template formed by the self-assembly of surfactant molecules, a technique known as true liquid crystal templating. The films retain the micrometer size of the Pt microdisk but offer electroactive areas up to 900 times larger. Optimum hydrogen loading conditions were determined, and the mesoporous Pd microdisks were found to have excellent potentiometric properties. From pH 2 to 12, their potential was Nernstian, highly reproducible, very stable (+/-1.2 mV over 2 h), and without hysteresis. Their response time was better than 1 s. However, the presence of oxygen reduced their lifetime significantly, thereby requiring frequent reloading. These microelectrodes do not require calibration before and after measurements, a procedure normally essential for potentiometric pH microsensors. To our knowledge, these are the first results where nanostructured materials made by the true liquid crystal templating method have been used in the potentiometric mode; moreover, these are the first results demonstrating the application of nanostructured microdisks in the potentiometric mode.
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Affiliation(s)
- Toru Imokawa
- Steel Research Laboratory, JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima 721-8510, Japan
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Rudd NC, Cannan S, Bitziou E, Ciani I, Whitworth AL, Unwin PR. Fluorescence Confocal Laser Scanning Microscopy as a Probe of pH Gradients in Electrode Reactions and Surface Activity. Anal Chem 2005; 77:6205-17. [PMID: 16194080 DOI: 10.1021/ac050800y] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The application of fluorescence confocal laser scanning microscopy (CLSM) to quantify three-dimensional pH gradients near electrode surfaces is described. The methodology utilizes a trace quantity of a fluorescent dye, fluorescein, in solution, which fluoresces strongly above pH 6.5, to map the pH adjacent to various ultramicroelectrodes undergoing electrochemical processes that lead to pH changes. The experimental fluorescence profiles, determined by CLSM, have been compared to models by solving the underlying mass transport equations, including the effect of natural convection, using the finite element method. The methodology has been validated through studies of the galvanostatic reduction of water at both disk and ring ultramicroelectrodes. The fluorescence profiles were found to be highly sensitive to both the initial bulk solution pH and applied current in a predictable fashion. The potentiostatic reduction of oxygen has been investigated at 25- and 10-microm-diameter platinum electrodes to confirm the effective number of electrons transferred in the reaction. Finally, the application of this methodology to observe defects in microelectrode arrays, particularly those that cannot be seen by optical microscopy, is described.
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Affiliation(s)
- Nicola C Rudd
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
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18
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Ciani I, Daniele S. Oxidation of hydroxide ions from dilute unbuffered solutions of ammonia at platinum microdiscs surrounded by thick and thin insulating sheaths. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.09.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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