1. Carbon particles co-doped with N, B and Fe from metal-organic supramolecular polymers for boosted oxygen reduction performance
- Author
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Wu Yuzhe, Li Yuntong, Li Zhongyu, Haiyang Wu, Zhang Hong, Lizong Dai, Tong Wu, Conghui Yuan, Birong Zeng, and Yiting Xu
- Subjects
chemistry.chemical_classification ,Materials science ,Renewable Energy, Sustainability and the Environment ,Coordination polymer ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrocatalyst ,01 natural sciences ,0104 chemical sciences ,Catalysis ,Supramolecular polymers ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Methanol ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Platinum ,Carbon ,Pyrolysis - Abstract
Rational design of high-efficiency and cost-effective nonprecious metal-based catalysts with outstanding oxygen reduction reaction (ORR) performance, is of great importance to replace platinum-based electrocatalysts in fuel cell. Herein, a novel N, B and Fe co-doped carbon materials (Fe-NBC) electrocatalyst is designed through the pyrolysis of a metal-organic coordination polymer precursor, which is formed from the coordination between dendrimer-like terpyridinic monomer and Fe3+. The as-prepared Fe-NBC catalyst exhibits superior ORR activity with an onset potential of 0.98 V and a half-wave potential of 0.86 V, which are comparable to that of the Pt/C catalyst. The formation of Fe-Nx moieties is considered to be the most important factor for the improved ORR activity of Fe-NBC. Besides, Fe-NBC catalyst displays a better methanol tolerance as well as durability (5 mV negative shift of E1/2, after 1000 cycles) in comparison with Pt/C (12 mV negative shift of E1/2, after 1000 cycles). This work provides a facile protocol for the design and fabrication of multi-element co-doped carbon materials. Moreover, the excellent ORR performance of these N, B and Fe co-doped carbon materials may be a potential candidate to replace Pt-based catalyst in fuel cells.
- Published
- 2019