Electrocatalytical Nitrite Oxidation via Manganese and Copper Oxides on Carbon Screen-Printed Electrode.
| Title: | Electrocatalytical Nitrite Oxidation via Manganese and Copper Oxides on Carbon Screen-Printed Electrode. |
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| Authors: | Farina R; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Dipartimento di Scienze Chimiche, Università Degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy.; Scalese S; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Alberti A; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Privitera SMS; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Capuano GE; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Corso D; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Department of Electrical, Computer and Biomedical Engineering, Università Degli Studi di Pavia, Via Ferrata 5, 27100 Pavia, Italy.; Screpis GA; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Analitiche (ChiBioFarAm), Università Degli Studi di Messina, Viale F. Stagno d'Alcontres 31, Vill. S. Agata, 98166 Messina, Italy.; Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati, CNR-ISMN, Viale F. Stagno d'Alcontres 31, Vill. S. Agata, 98166 Messina, Italy.; Reina SCR; Dipartimento di Scienze Mediche, Chirurgiche e Tecnologie Avanzate 'G.F. Ingrassia', Università Degli Studi di Catania, Via S. Sofia 87, 95123 Catania, Italy.; Condorelli GG; Dipartimento di Scienze Chimiche, Università Degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy.; Coniglio MA; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy.; Dipartimento di Scienze Mediche, Chirurgiche e Tecnologie Avanzate 'G.F. Ingrassia', Università Degli Studi di Catania, Via S. Sofia 87, 95123 Catania, Italy.; Libertino S; Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), Strada VIII Z.I., 5, 95121 Catania, Italy. |
| Source: | Sensors (Basel, Switzerland) [Sensors (Basel)] 2025 Jun 16; Vol. 25 (12). Date of Electronic Publication: 2025 Jun 16. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: MDPI Country of Publication: Switzerland NLM ID: 101204366 Publication Model: Electronic Cited Medium: Internet ISSN: 1424-8220 (Electronic) Linking ISSN: 14248220 NLM ISO Abbreviation: Sensors (Basel) Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Basel, Switzerland : MDPI, c2000- |
| Abstract: | Nitrite (NO2-) has long been recognized as a contaminant of concern due to its detrimental effects on both human health and the environment. As a result, there is a continuing need to develop sensitive, real-time, low-cost, and portable systems for the accurate detection of trace levels of NO2- in drinking water. We present a novel, low-cost, and easy-to-fabricate amperometric sensor designed for detecting low concentrations of NO2- in drinking water. The fabrication technique involves the electrodeposition of manganese and copper oxides onto a carbon working electrode. CuO and MnO2 act synergistically as efficient catalysts for the electrooxidation of nitrite to nitrate (NO3-) thanks to their complementary redox properties. The resulting sensor exhibits high catalytic activity toward the electrooxidation of NO2-, with a sensitivity of 10.83 μA/µM, a limit of detection (LOD) of 0.071 µM, and a good linear dynamic concentration range (0.2-60 µM). The sensor's performance was evaluated against potential interfering analytes (NO3-, Cl-, NH4+, and NH2Cl), all of which showed negligible interference. Reproducibility (maximum standard deviation 2.91%) and repeatability (usable up to three times) were also evaluated. |
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| Contributed Indexing: | Keywords: cyclic voltammetry; electrocatalysis; electrodeposition; metal oxides; nitrite oxidation; nitrite sensing |
| Entry Date(s): | Date Created: 20250627 Latest Revision: 20250629 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC12197279 |
| DOI: | 10.3390/s25123764 |
| PMID: | 40573652 |
| Database: | MEDLINE |
Journal Article