Abstract
AbstractCarbonaceous transition metal catalysts have become one of the most promising materials to replace expensive Pt‐based catalysts because of their high oxygen reduction reaction (ORR) activity and stability. In this paper, three metal‐containing nanoparticles, namely FeCoNi, were encapsulated into carbonaceous matrixes by simple stirring and calcination. The morphology of as‐obtained FeCoNi particles was controlled and investigated by adjusting the amount of melamine as carbon (and nitrogen) source. FeCoNi@NC/CNTs‐6 showed the best ORR activity among all of the catalysts. The half‐wave potential of the FeCoNi@NC/CNTs‐6 is 0.83 V vs. RHE, and its limiting current density is up to 5.16 mA cm−2. It was found that the unique 3D carbon‐based matrix may be the main reason for this enhanced ORR activity. Additionally, higher content of pyridine N and Fe(Co/Ni)Nx group in FeCoNi@NC/CNTs‐6 catalyst may be another reason. Finally, FeCoNi@NC/CNTs‐6 was also used as a cathode to assemble the zinc‐air battery. The results showed that it had better battery performance than the reference Pt/C catalyst. These results could provide theoretical and practical support for the enlarged applicability of similar catalysts.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
