Back to Search Start Over

Large-scale production of holey carbon nanosheets implanted with atomically dispersed Fe sites for boosting oxygen reduction electrocatalysis

Authors :
Dong Liu
Junjie Mao
Lei Shi
Changcheng Jiang
Xuanni Lin
Feng Liu
Chuangang Hu
Source :
Nano Research. 15:1926-1933
Publication Year :
2021
Publisher :
Springer Science and Business Media LLC, 2021.

Abstract

Atomically dispersed metals stabilized by nitrogen elements in carbon skeleton hold great promise as alternatives for Pt-based catalysts towards oxygen reduction reaction in proton exchange membrane fuel cells. However, their widespread commercial applications are limited by complicated synthetic procedures for mass production. Herein, we are proposing a simple, green mechanochemical approach to synthesize zeolitic imidazolate frameworks precursors for the production of atomically dispersed “Fe-N4” sites in holey carbon nanosheets on a large scale. The thin porous carbon nanosheets (PCNs) with atomically dispersed “Fe-N4” moieties can be prepared in hectogram scale by directly pyrolysis of salt-sealed Fe-based zeolitic imidazolate framework-8 (Fe-ZIF-8@NaCl) precursors. The PCNs possess large specific surface area, abundant lamellar edges and rich “Fe-N4” active sites, and show superior catalytic activity towards oxygen reduction reaction in an acid electrolyte. This work provides a promising approach to cost-effective production of atomically dispersed transition metal catalysts on large scale for practical applications.

Details

ISSN :
19980000 and 19980124
Volume :
15
Database :
OpenAIRE
Journal :
Nano Research
Accession number :
edsair.doi...........9f568fde9516ec009144ef39f5bf4233