AI Article Synopsis
- The study focuses on creating a new type of non-precious metal catalyst, NiSe-FeO@LC, to enhance the oxygen evolution reaction (OER) needed for water splitting.
- This innovative catalyst shows impressive performance with a low overpotential of 265 mV, a Tafel slope of 83 mV·dec, and strong long-term stability.
- The combination of FeO with NiSe helps improve electron transfer by optimizing the interface structure and the carbon layer effectively protects the catalyst from degradation during use.
Article Abstract
The development of productive and durable non-precious metal catalysts for the sluggish oxygen evolution reaction (OER) is critical for water splitting. Herein, a novel NiSe-FeO heterojunction encapsulated in lignin-derived carbon layer (NiSe-FeO@LC) was synthesized via hydrothermal self-assembly and in-situ pyrolysis. NiSe-FeO@LC exhibited excellent OER performance with an overpotential of 265 mV at 50 mA·cm, a Tafel slope of 83 mV·dec, as well as long-term stability. Both experimental and DFT calculation results indicated that the doping of FeO into NiSe@LC successfully optimized the dual interface structure between NiSe and FeO, thereby promoted the d-bands orbital hybridization, that facilitated electron transfer. Besides, the carbon coating effectively protected the NiSe-FeO components from leaching and agglomerating during the reaction. This study provides insight into the significance of lignin-derived carbon-encapsulated metallic catalyst for electrocatalytic OER process.
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| http://dx.doi.org/10.1016/j.ijbiomac.2024.133509 | DOI Listing |
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