期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 11, 页码 6023-6030出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta09560a
关键词
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资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/M0138/1, EP/M013812/1, EP/S023259/1]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [866402]
- National Research Council of Canada through the Materials for Clean Fuels Challenge Program
- EPSRC Centre for Doctoral Training in the Advanced Characterisation of Materials [EP/L015277/1]
- Imperial College London SPIN-Lab [EP/P030548/1]
- Royal Academy of Engineering Chair in Emerging Technologies Fellowship
- Marie SklodowskaCurie Fellowship H2020-MSCA-IF-2019 through the project HAEMOGLOBIN [892614]
- Marie Sklodowska-Curie Fellowship H2020-MSCA-IF-2019 [897014, 896637]
- I20-EDE at Diamond Light Source [SP28663]
- Engineering and Physical Sciences Research Council [EP/P02520X/1, EP/V001914/1] Funding Source: researchfish
- Marie Curie Actions (MSCA) [897014, 892614, 896637] Funding Source: Marie Curie Actions (MSCA)
Single-atom catalysts, particularly the Fe-N-C family, have emerged as a promising alternative to platinum group metals in fuel cells for the oxygen reduction reaction. This work presents a novel method for the targeted synthesis of dual metal atom catalysts, which can significantly enhance the catalytic activity and efficiency.
Single-atom catalysts, in particular the Fe-N-C family of materials, have emerged as a promising alternative to platinum group metals in fuel cells as catalysts for the oxygen reduction reaction. Numerous theoretical studies have suggested that dual atom catalysts can appreciably accelerate catalytic reactions; nevertheless, the synthesis of these materials is highly challenging owing to metal atom clustering and aggregation into nanoparticles during high temperature synthesis treatment. In this work, dual metal atom catalysts are prepared by controlled post synthetic metal-coordination in a C2N-like material. The configuration of the active sites was confirmed by means of X-ray adsorption spectroscopy and scanning transmission electron microscopy. During oxygen reduction, the catalyst exhibited an activity of 2.4 +/- 0.3 A g(carbon)(-1) at 0.8 V versus a reversible hydrogen electrode in acidic media, comparable to the most active in the literature. This work provides a novel approach for the targeted synthesis of catalysts containing dual metal sites in electrocatalysis.
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