Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties
Herein, we present the investigation of catalytical and fluorescence properties for Ni<sub>11</sub>(HPO<sub>3</sub>)<sub>8</sub>(OH)<sub>6</sub> materials obtained through a hydrothermal approach. As part of the constant search for new materials that a...
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MDPI AG
2022-12-01
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| author | Maria Poienar Paula Svera Bogdan-Ovidiu Taranu Catalin Ianasi Paula Sfirloaga Gabriel Buse Philippe Veber Paulina Vlazan |
| author_facet | Maria Poienar Paula Svera Bogdan-Ovidiu Taranu Catalin Ianasi Paula Sfirloaga Gabriel Buse Philippe Veber Paulina Vlazan |
| author_sort | Maria Poienar |
| collection | DOAJ |
| description | Herein, we present the investigation of catalytical and fluorescence properties for Ni<sub>11</sub>(HPO<sub>3</sub>)<sub>8</sub>(OH)<sub>6</sub> materials obtained through a hydrothermal approach. As part of the constant search for new materials that are both cost effective and electrocatalytically active for the oxygen evolution reaction (OER) in alkaline medium, the present study involves several graphite electrodes modified with Ni<sub>11</sub>(HPO<sub>3</sub>)<sub>8</sub>(OH)<sub>6</sub> mixed with reduced graphene oxide (rGO) and carbon black. The experimental results obtained in 0.1 mol L<sup>–1</sup> KOH electrolyte solution show the electrode modified with rGO, 5 mg carbon black and 1 mg nickel phosphite as displaying the highest current density. This performance can be attributed to the synergistic effect between nickel phosphite and the carbon materials. Investigation of the electrode’s OER performance in 0.1 mol L<sup>–1</sup> KOH solution revealed a Tafel slope value of just 46 mV dec<sup>–1</sup>. By increasing the concentration to 0.5 and 1 mol L<sup>–1</sup>, this value increased as well, but there was a significant decrease in overpotential. Fluorescence properties were analyzed for the first time at the excitation length of 344 nm, and the observed strong and multiple emissions are described. |
| first_indexed | 2024-03-09T17:09:53Z |
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| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T17:09:53Z |
| publishDate | 2022-12-01 |
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| series | Crystals |
| spelling | doaj.art-ef9cd0ef7a4347c4b6cb54426289109d2023-11-24T14:11:14ZengMDPI AGCrystals2073-43522022-12-011212180310.3390/cryst12121803Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence PropertiesMaria Poienar0Paula Svera1Bogdan-Ovidiu Taranu2Catalin Ianasi3Paula Sfirloaga4Gabriel Buse5Philippe Veber6Paulina Vlazan7National Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Street, No. 144, 300569 Timisoara, RomaniaNational Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Street, No. 144, 300569 Timisoara, RomaniaNational Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Street, No. 144, 300569 Timisoara, RomaniaCoriolan Drăgulescu Institute of Chemistry, Bv. Mihai Viteazul, No. 24, 300223 Timisoara, RomaniaNational Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Street, No. 144, 300569 Timisoara, RomaniaInstitute for Advanced Environmental Research, West University of Timisoara (ICAM-WUT), Oituz Str., No. 4, 300086 Timisoara, RomaniaFrench National Centre for Scientific Research, Institute of Light and Matter, University Claude Bernard Lyon 1, UMR 5306 Villeurbanne, FranceNational Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Street, No. 144, 300569 Timisoara, RomaniaHerein, we present the investigation of catalytical and fluorescence properties for Ni<sub>11</sub>(HPO<sub>3</sub>)<sub>8</sub>(OH)<sub>6</sub> materials obtained through a hydrothermal approach. As part of the constant search for new materials that are both cost effective and electrocatalytically active for the oxygen evolution reaction (OER) in alkaline medium, the present study involves several graphite electrodes modified with Ni<sub>11</sub>(HPO<sub>3</sub>)<sub>8</sub>(OH)<sub>6</sub> mixed with reduced graphene oxide (rGO) and carbon black. The experimental results obtained in 0.1 mol L<sup>–1</sup> KOH electrolyte solution show the electrode modified with rGO, 5 mg carbon black and 1 mg nickel phosphite as displaying the highest current density. This performance can be attributed to the synergistic effect between nickel phosphite and the carbon materials. Investigation of the electrode’s OER performance in 0.1 mol L<sup>–1</sup> KOH solution revealed a Tafel slope value of just 46 mV dec<sup>–1</sup>. By increasing the concentration to 0.5 and 1 mol L<sup>–1</sup>, this value increased as well, but there was a significant decrease in overpotential. Fluorescence properties were analyzed for the first time at the excitation length of 344 nm, and the observed strong and multiple emissions are described.https://www.mdpi.com/2073-4352/12/12/1803nickel phosphitecarbonoxygen evolution reactionfluorescence |
| spellingShingle | Maria Poienar Paula Svera Bogdan-Ovidiu Taranu Catalin Ianasi Paula Sfirloaga Gabriel Buse Philippe Veber Paulina Vlazan Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties Crystals nickel phosphite carbon oxygen evolution reaction fluorescence |
| title | Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties |
| title_full | Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties |
| title_fullStr | Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties |
| title_full_unstemmed | Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties |
| title_short | Electrochemical Investigation of the OER Activity for Nickel Phosphite-Based Compositions and Its Morphology-Dependent Fluorescence Properties |
| title_sort | electrochemical investigation of the oer activity for nickel phosphite based compositions and its morphology dependent fluorescence properties |
| topic | nickel phosphite carbon oxygen evolution reaction fluorescence |
| url | https://www.mdpi.com/2073-4352/12/12/1803 |
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