<i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water
Exploring different catalytic material paradigms could drive the search for the best oxygen evolution reaction (OER) catalyst to achieve industrially-feasible hydrogen fuel from water. Cobalt-based materials are considered good choices in this regard. Herein, we synthesized <i>Pluronic-123 (&l...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/3/636 |
| _version_ | 1797612927704891392 |
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| author | Ibrahim Khan |
| author_facet | Ibrahim Khan |
| author_sort | Ibrahim Khan |
| collection | DOAJ |
| description | Exploring different catalytic material paradigms could drive the search for the best oxygen evolution reaction (OER) catalyst to achieve industrially-feasible hydrogen fuel from water. Cobalt-based materials are considered good choices in this regard. Herein, we synthesized <i>Pluronic-123 (<b>P-123</b>)</i>-stabilized, unique, rough, globular-shaped cobalt vanadate microparticles (µ-CoV MPs) using an ultrasonic-assisted solvothermal method. The as-synthesized µ-CoV MPs were subjected to high-temperature annealing to improve the crystallinity and the surface polymer moieties were pyrolyzed. Conventional SEM, XRD, FTIR, and BET analyses evaluated the morphological and structural features. The temperature-controlled crystalline phase led to extensive OER performance in SW electrolytes. The OER onset potential (V<sub>OER</sub>) was observed at 1.557 V@10 mA/cm<sup>2</sup> in seawater (SW) for µ-CoV MPs annealed at 400 °C compared to the V<sub>OER</sub> of 1.632 V of non-annealed µ-CoV MPs. The current density showed a steep increase beyond 1.557 V, confirming the excellent electrokinetics OER behavior of the µ-CoV MPs-deposited electrode. The chronoamperometric <b>(<i>I</i></b>–<b><i>t</i>)</b> OER stability comparison in SW and connate water (CW) electrolytes indicated only a <20% initial current density decrease after 8 h in the case of the SW electrolyte. However, the CW electrolyte posed serious challenges to the electrode and activity was completely lost after <2 h. The electrolytic comparison indicated that SW is highly suitable for µ-CoV MPs electrodes. |
| first_indexed | 2024-03-11T06:47:49Z |
| format | Article |
| id | doaj.art-96dcd2efaf6245d0ab5c522ef6d03364 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T06:47:49Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-96dcd2efaf6245d0ab5c522ef6d033642023-11-17T10:12:16ZengMDPI AGCatalysts2073-43442023-03-0113363610.3390/catal13030636<i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate WaterIbrahim Khan0School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of KoreaExploring different catalytic material paradigms could drive the search for the best oxygen evolution reaction (OER) catalyst to achieve industrially-feasible hydrogen fuel from water. Cobalt-based materials are considered good choices in this regard. Herein, we synthesized <i>Pluronic-123 (<b>P-123</b>)</i>-stabilized, unique, rough, globular-shaped cobalt vanadate microparticles (µ-CoV MPs) using an ultrasonic-assisted solvothermal method. The as-synthesized µ-CoV MPs were subjected to high-temperature annealing to improve the crystallinity and the surface polymer moieties were pyrolyzed. Conventional SEM, XRD, FTIR, and BET analyses evaluated the morphological and structural features. The temperature-controlled crystalline phase led to extensive OER performance in SW electrolytes. The OER onset potential (V<sub>OER</sub>) was observed at 1.557 V@10 mA/cm<sup>2</sup> in seawater (SW) for µ-CoV MPs annealed at 400 °C compared to the V<sub>OER</sub> of 1.632 V of non-annealed µ-CoV MPs. The current density showed a steep increase beyond 1.557 V, confirming the excellent electrokinetics OER behavior of the µ-CoV MPs-deposited electrode. The chronoamperometric <b>(<i>I</i></b>–<b><i>t</i>)</b> OER stability comparison in SW and connate water (CW) electrolytes indicated only a <20% initial current density decrease after 8 h in the case of the SW electrolyte. However, the CW electrolyte posed serious challenges to the electrode and activity was completely lost after <2 h. The electrolytic comparison indicated that SW is highly suitable for µ-CoV MPs electrodes.https://www.mdpi.com/2073-4344/13/3/636cobalt vanadate (CoV)OERwater splittingseawaterconnate water<i>Pluronic-123 (<b>P-123</b>)</i> |
| spellingShingle | Ibrahim Khan <i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water Catalysts cobalt vanadate (CoV) OER water splitting seawater connate water <i>Pluronic-123 (<b>P-123</b>)</i> |
| title | <i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water |
| title_full | <i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water |
| title_fullStr | <i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water |
| title_full_unstemmed | <i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water |
| title_short | <i>Pluronic-123</i> Assisted Synthesis of Cobalt Vanadate Microparticles (µ-CoV MPs) for Durable Electrochemical Oxygen Evolution Reaction in Seawater and Connate Water |
| title_sort | i pluronic 123 i assisted synthesis of cobalt vanadate microparticles µ cov mps for durable electrochemical oxygen evolution reaction in seawater and connate water |
| topic | cobalt vanadate (CoV) OER water splitting seawater connate water <i>Pluronic-123 (<b>P-123</b>)</i> |
| url | https://www.mdpi.com/2073-4344/13/3/636 |
| work_keys_str_mv | AT ibrahimkhan ipluronic123iassistedsynthesisofcobaltvanadatemicroparticlesμcovmpsfordurableelectrochemicaloxygenevolutionreactioninseawaterandconnatewater |