Synthesis of hollow Fe, Co, and N-doped carbon catalysts from conducting polymer-metal-organic-frameworks core-shell particles for their application in an oxygen reduction reaction. (5th July 2022)

• Record Type: Journal Article
• Authors: Nguyen, Quoc Hao; Im, Kyungmin; Kim, Jinsoo
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 57(2022)
• Page Start: 24169
• Page End: 24178
• Publication Date: 2022-07-05
• Subjects: Oxygen reduction reaction -- M-N-C -- Metal-organic framework -- Polypyrrole -- Core-shell; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.04.075
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Oxygen reduction reaction (ORR), one of the key reactions for fuel cells and zinc-air batteries, should be improved for higher performance. Herein, we fabricated hollow Fe, Co, and nitrogen co-doped carbon (H-FeCo-NC) catalyst, which was prepared by carbonization of core-shell particles made of polypyrrole (PPy)-coated polystyrene (PS) spheres as cores and (Zn, Co) bimetallic-zeolitic imidazolate frameworks (ZnCoBZIFs) as shells. PPy was used as a nitrogen and a carbon source. The H-FeCo-NC catalyst had a high surface area of 324.08 m 2 g −1 with uniformly distributed Fe and Co species, and excellent ORR performance with the half-wave potential of 0.888 V vs. reversible hydrogen electrode in alkaline media. Furthermore, the H-FeCo-NC catalyst demonstrated exceptional stability, durability, and tolerance to methanol crossover. Highlights: Hollow Fe, Co, and N-doped carbon was prepared using polypyrrole and MOFs. Polypyrrole served as the source of carbon and nitrogen. Hollow FeCo-NC catalyst showed high surface area with high metal dispersion. The ORR activity, stability, and durability of the H-FeCo-NC catalyst were excellent.