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Begum H, Islam MN, Ben Aoun S, Safwan JA, Shah SS, Aziz MA, Hasnat MA. Electrocatalytic reduction of nitrate ions in neutral medium at coinage metal-modified platinum electrodes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:34904-34914. [PMID: 36525190 DOI: 10.1007/s11356-022-24372-z] [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: 09/06/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Nitrate is a water-soluble toxic pollutant that needs to be excluded from the environment. For this purpose, several electrochemical studies have been conducted but most of them focused on the nitrate reduction reaction (NRR) in alkaline and acidic media while insignificant research is available in neutral media with Pt electrode. In this work, we explored the effect of three coinage metals (Cu, Ag, and Au) on Pt electrode for the electrochemical reduction of nitrate in neutral solution. Among the three electrodes, Pt-Cu exhibited the best catalytic activity toward NRR, whereas Pt-Au electrode did not show any reactivity. An activity order of Pt-Cu > Pt-Ag > Pt-Au was observed pertaining to NRR. The Pt-Ag electrode produces nitrite ions by reducing nitrate ions ([Formula: see text]. Meanwhile, at Pt-Cu electrode, nitrate reduction yields ammonia via both direct ([Formula: see text] and indirect ([Formula: see text] reaction pathways depending on the potential. The cathodic transfer coefficients were estimated to be ca. 0.40 and ca. 0.52, while the standard rate constants for nitrate reduction were calculated as ca. 2.544 × 10-2 cm.s-1 and ca. 1.453 × 10-2 cm.s-1 for Pt-Cu and Pt-Ag electrodes, respectively. Importantly, Pt-Cu and Pt-Ag electrodes execute NRR in the neutral medium between their respective Hydrogen-Evolution Reaction (HER) and Open-Circuit Potential (OCP), implying that on these electrodes, HER and NRR do not compete and the latter is a corrosion-free process.
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Affiliation(s)
- Humayra Begum
- Electrochemistry & Catalysis Research Laboratory (ECRL), Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Md Nurnobi Islam
- Electrochemistry & Catalysis Research Laboratory (ECRL), Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Sami Ben Aoun
- Department of Chemistry, Faculty of Science, Taibah University, PO Box 30002, Al-Madinah, Al-Munawarah, Saudi Arabia
| | - Jamil A Safwan
- Electrochemistry & Catalysis Research Laboratory (ECRL), Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh
| | - Syed Shaheen Shah
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum & Minerals, KFUPM Box 5040, Dhahran, 31261, Saudi Arabia
- Physics Department, King Fahd University of Petroleum & Minerals, KFUPM Box 5047, Dhahran, 31261, Saudi Arabia
| | - Md Abdul Aziz
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum & Minerals, KFUPM Box 5040, Dhahran, 31261, Saudi Arabia
| | - Mohammad A Hasnat
- Electrochemistry & Catalysis Research Laboratory (ECRL), Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology, Sylhet, 3114, Bangladesh.
- Bangladesh Academy of Sciences, Agargaon, Dhaka, 1207, Bangladesh.
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Hubin A, Doneux T. Preface to the Special Issue in the honour of Claudine Buess-Herman on the occasion of her 65th anniversary. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dia O, Drogui P, Buelna G, Dubé R. Strategical approach to prevent ammonia formation during electrocoagulation of landfill leachate obtained from a biofiltration process. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.08.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chen Legrand D, Barus C, Garçon V. Square Wave Voltammetry Measurements of Low Concentrations of Nitrate Using Au/AgNPs Electrode in Chloride Solutions. ELECTROANAL 2017. [DOI: 10.1002/elan.201700447] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- D. Chen Legrand
- Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, UMR 5566; Université de Toulouse, CNRS, CNES, IRD, UPS; 18 Avenue Edouard Belin 31401 TOULOUSE Cedex 9 France
| | - C. Barus
- Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, UMR 5566; Université de Toulouse, CNRS, CNES, IRD, UPS; 18 Avenue Edouard Belin 31401 TOULOUSE Cedex 9 France
| | - V. Garçon
- Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, UMR 5566; Université de Toulouse, CNRS, CNES, IRD, UPS; 18 Avenue Edouard Belin 31401 TOULOUSE Cedex 9 France
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Ivanova NM, Soboleva EA, Visurkhanova YA, Kirilyus IV. Electrocatalytic activity of polyaniline-copper composites in electrohydrogenation of p-nitroaniline. RUSS J ELECTROCHEM+ 2015. [DOI: 10.1134/s1023193515020056] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Insight into the electroreduction of nitrate ions at a copper electrode, in neutral solution, after determination of their diffusion coefficient by electrochemical impedance spectroscopy. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.07.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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