Cobalt and Nitrogen Co-doped Porous Carbon Spheres as Efficient Oxygen Reduction Electrocatalysts

Iron and nitrogen co-doped carbon spheres (Fe-N/CS) catalysts were prepared from iron nitrate nonahydrate by electrospinning and thermal treatment. The effect of different iron contents on the morphology and performance of the catalyst was explored by changing the amount of iron precursor. And the relationship between its structure and the oxygen reduction activity was also discussed. The results showed that there is an optimal content for the iron. When the iron content was 0.18% (Fe-N/CS-0.18), the initial and half-wave potential of the catalyst were 0.970 V and 0.842 V, which are the best result among the Fe-N/CS catalysts. Compared with that for commercial Pt/C, the Fe-N/CS-0.18 even showed a better ORR catalytic performance. The current retention of the Fe-N/CS-0.18 was 90.6% after continuous operation for 10000 s, which is better than that for commercial Pt/C(84.2%). Additionally, the methanol tolerance of Fe-N/CS-0.18 is better than that of the commercial Pt/C. The current density percentage of Fe-N/CS-0.18 has slightly decrease after the addition of methanol at 500 s. However, the commercial Pt/C decreases sharply. This was attributed to the abundant active nitrogen (pyridine nitrogen and pyrrole nitrogen) and suitable iron content in Fe-N/CS-0.18, which easily promote the oxygen reduction reaction.

show abstract

F127 Assisted Synthesis of Tri-(Fe/F/N)-doped Porous Carbons with a High Density of Fe3C and Fe-N4 Catalytic Sites as Efficient Electrocatalysts for ORR

Niu¹

2021

International Journal of Electrochemical Science

View full text Add to dashboard Cite

Because of the slow reaction rate of the oxygen reduction reaction (ORR), high-performance catalysts are needed to accelerate the reaction. However, platinum (Pt)-based electrocatalysts have the shortcomings of high cost and poor stability. The development of low-cost, high catalytic activity and long-term durability non-precious metal electrocatalysts has become a research hotspot. In this study, we successfully prepared tri(Fe/N/F)-doped FeNF-F127C catalyst featuring mesoporous carbon via polyacrylonitrile/polyvinylidene fluoride/F127 (PAN/PVDF/F127) tricomponent polymers and iron(III) nitrate nonahydrate (Fe(NO3)3•9H2O) followed by thermal carbonization. Compared with commercial Pt/C catalysts, FeNF-F127C showed excellent long-term durability and considerably better methanol tolerance as well as a high electrocatalytic activity (Eonset: 0.956 V vs RHE, E1/2: 0.823 vs RHE, and electron transfer number: 4.0) in alkaline media. The improved ORR performance could be explained by larger specific surface area with a well-ordered mesoporous structure, high density of Fe3C sites and Fe-N4 sites.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Cobalt and Nitrogen Co-doped Porous Carbon Spheres as Efficient Oxygen Reduction Electrocatalysts

Cited by 3 publications

References 26 publications

Recent progress of carbon-based electrocatalytic materials in Lithium-based batteries

Recent progress of carbon-based electrocatalytic materials in Lithium-based batteries

Iron and Nitrogen Co-doped Carbon Spheres as High Efficiency Oxygen Reduction Catalyst

F127 Assisted Synthesis of Tri-(Fe/F/N)-doped Porous Carbons with a High Density of Fe3C and Fe-N4 Catalytic Sites as Efficient Electrocatalysts for ORR

Contact Info

Product

Resources

About