A Green Synthesis of CoFe<sub>2</sub>O<sub>4</sub> Decorated ZIF-8 Composite for Electrochemical Oxygen Evolution
Low-cost, sustainable hydrogen production requires noble metal-free electrocatalysts for water splitting. In this study, we prepared zeolitic imidazolate frameworks (ZIF) decorated with CoFe<sub>2</sub>O<sub>4</sub> spinel nanoparticles as active catalysts for oxygen evolutio...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-05-01
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| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/24/11/9585 |
| Summary: | Low-cost, sustainable hydrogen production requires noble metal-free electrocatalysts for water splitting. In this study, we prepared zeolitic imidazolate frameworks (ZIF) decorated with CoFe<sub>2</sub>O<sub>4</sub> spinel nanoparticles as active catalysts for oxygen evolution reaction (OER). The CoFe<sub>2</sub>O<sub>4</sub> nanoparticles were synthesized by converting agricultural bio-waste (potato peel extract) into economically valuable electrode materials. The biogenic CoFe<sub>2</sub>O<sub>4</sub> composite showed an overpotential of 370 mV at a current density of 10 mA cm<sup>−2</sup> and a low Tafel slope of 283 mV dec<sup>−1</sup>, whereas the ZIF@CoFe<sub>2</sub>O<sub>4</sub> composite prepared using an in situ hydrothermal method showed an overpotential of 105 mV at 10 mA cm<sup>−2</sup> and a low Tafel slope of 43 mV dec<sup>−1</sup> in a 1 M KOH medium. The results demonstrated an exciting prospect of high-performance noble metal-free electrocatalysts for low-cost, high-efficiency, and sustainable hydrogen production. |
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| ISSN: | 1661-6596 1422-0067 |