Covalent Phenanthroline Framework Derived FeS@Fe3C Composite Nanoparticles Embedding in N‐S‐Codoped Carbons as Highly Efficient Trifunctional Electrocatalysts. (26th October 2018)

• Record Type: Journal Article
• Authors: Kong, Fantao; Fan, Xiaohong; Kong, Aiguo; Zhou, Ziqian; Zhang, Xiaoying; Shan, Yongkui
• Is Part Of: Advanced functional materials. Volume 28:Number 51(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-26
• Subjects: carbon -- covalent phenanthroline frameworks -- FeS@Fe3C -- Pt‐free catalysts -- trifunctional electrocatalysts; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201803973
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Efficient and earth‐abundant materials with multifunctional electrocatalytic properties within a wide range of pH are the new darlings for developing green energy conversion and storage techniques. A novel porous covalent phenanthroline framework (Fe‐Phen‐COFs) that involved Fe‐DMSO (dimethyl sulfoxide) coordination complexes is successfully synthesized using 3, 8‐dibromophenanthroline and 1, 3, 5‐benzenetriboronicacid trivalent alcohol ester as a rigid building block via Suzuki coupling reaction. Fe‐Phen‐COFs as the self‐carrier enriched with Fe, S, N, and C is pyrolyzed to produce N‐S‐codoping carbons with embedded core–shell Fe3 C and FeS composite nanostructures (FeS/Fe3 C@N‐S‐C). The FeS/Fe3 C@N‐S‐C‐800 obtained by pyrolysis at 800 °C exhibits efficient trifunctional electrocatalytic activity for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) within a wide pH range. Impressively, the ORR half‐potential of FeS/Fe3 C@N‐S‐C‐800 reaches 0.87 V in 0.1m KOH, more positive than the previously reported Pt‐free electrocatalysts. It could be utilized as the advanced air electrode materials in zinc–air batteries, which exhibit an excellent power density and cycling stability superior to those of Pt/C‐based zinc–air battery. Thermal conversion of novel Fe‐Phen‐COFs provides an effective strategy to prepare high‐performance trifunctional electrocatalytic materials for the new‐generation powerful energy conversion technologies. Abstract : FeS@Fe3 C coupled composite nanoparticles embedding in N‐S‐codoped carbons (FeS/Fe3 C@N‐S‐C) are prepared by thermal conversion of the Fe‐coordinated covalent phenanthroline frameworks (Fe‐Phen‐COFs). The prepared material exhibits excellent catalytic activity as a highly efficient trifunctional nonprecious metal electrocatalyst for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) in a wide range of pH.