MOF-derived N-doped CoNi@C as bifunctional catalysts for efficient water splitting
Catalysis Science and Technology, ISSN: 2044-4761, Vol: 14, Issue: 23, Page: 6814-6823
2024
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
The development of efficient and stable bifunctional non-noble metal catalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential for electrochemical water splitting. In this study, CoNi@C core-shell structure catalysts derived from ZIF-67 were synthesized through high-temperature calcination. The hydrophilic carbon shell inhibits the oxidation of Co and Ni and enhances the activity and stability of the water splitting reaction. CoNi serves as the active site of the reaction, while the doped nitrogen further promotes the electrocatalytic reaction. The synthesized NiCo/C catalyst exhibits high bifunctional performance, with low overpotentials at 100 mA cm for the OER (380 mV) and HER (357 mV), and a high double-layer capacitance (54 mF cm). Moreover, the NiCo/C catalyst serves as an effective cathode for water splitting in a two-electrode system, demonstrating a stable cell voltage of 2.05 V and maintaining a constant catalytic current of 100 mA cm over 24 hours. DFT calculation showed that the active site of the OER and HER was Co.
Bibliographic Details
Royal Society of Chemistry (RSC)
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