Mechanosynthesis of a bifunctional FeNi–N–C oxygen electrocatalyst via facile mixed-phase templating and preheating-pyrolysis

文献情報

出版日 2023-11-18

DOI 10.1039/D3TA04580C

インパクトファクター 12.732

著者

Akmal Kosimov, Gulnara Yusibova, Ivan Tito Wojsiat, Jaan Aruväli, Maike Käärik, Jaan Leis, Peeter Paaver, Sergei Vlassov, Arvo Kikas, Vambola Kisand, Helle-Mai Piirsoo, Kaupo Kukli, Ivo Heinmaa, Tiit Kaljuvee, Nadezda Kongi

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要旨

Metal–air batteries (MABs) offer a promising solution to address the intermittent nature of renewable energy sources and facilitate the global transition to green energy, thereby mitigating climate issues. However, efficient and affordable bifunctional electrocatalysts are essential to overcome the kinetic limitations of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in MABs, ensuring optimal performance and accessibility of these devices. This study reports a template-assisted mechanosynthesis of a bifunctional FeNi–N–C electrocatalyst by employing low-cost and sustainable FeCl3, NiCl2, 2,4,6-tri(2-pyridyl)-1,3,5-triazine (TPTZ), melamine and KCl. Facile liquid-assisted grinding was utilized to produce KCl-templated FeNi-TPTZ metal–organic material, enabling template-induced stability of the catalyst. A carefully tailored pyrolysis strategy allows near-melt preheating of FeNi-TPTZ, increasing the concentration of active sites. Furthermore, the pyrolysis protocol enables the phase transition of KCl, functionalizing it as a solid–liquid template to achieve a high porosity (SBET = 570 m2 g−1). The produced catalyst – IroNi-3D exhibits impressive ORR (E1/2 = 0.82 V, Eonset = 0.92 V) and OER (Ej=10 = 1.52 V) performance with a ΔE of 0.70 V. In zinc–air battery testing, IroNi-3D outperforms PtRu with a power density of 144 mW cm−2. This cost-effective FeNi–N–C electrocatalyst presents great promise for widespread use in MABs, advancing renewable energy storage and contributing to global climate change mitigation.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment