Highly ordered macroporous dual-element-doped carbon from metal-organic frameworks for catalyzing oxygen reduction.

Chemical Science
Wei XiaJing Tang

Abstract

Multiple heteroatom-doped carbons with 3D ordered macro/meso-microporous structures have not been realized by simple carbonization of metal-organic frameworks (MOFs). Herein, ordered macroporous phosphorus- and nitrogen-doped carbon (M-PNC) is prepared successfully by carbonization of double-solvent-induced MOF/polystyrene sphere (PS) precursors accompanied with spontaneous removal of the PS template, followed by post-doping. M-PNC shows a high specific surface area of 837 m2 g-1, nitrogen doping of 3.17 at%, and phosphorus doping of 1.12 at%. Thanks to the hierarchical structure, high specific surface area, and multiple heteroatom-doping, M-PNC exhibits unusual catalytic activity as an electrocatalyst for the oxygen reduction reaction. Computational calculation reveals that the P[double bond, length as m-dash]O group helps stabilize the adsorption of intermediates, and the position of P[double bond, length as m-dash]O relative to graphitic N significantly improves the activity of the adjacent carbons for electrocatalysis.

References

Jun 27, 2006·Proceedings of the National Academy of Sciences of the United States of America·Kyo Sung ParkOmar M Yaghi
Jan 22, 2015·Journal of the American Chemical Society·Wenxiu YangShaojun Guo
Jun 9, 2017·Journal of the American Chemical Society·Changming ZhaoYadong Li
Feb 7, 2018·Chemical Reviews·Ambarish KulkarniJens K Nørskov
Mar 27, 2019·Journal of Chemical Information and Modeling·Michelle A HunterDebra J Searles

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Methods Mentioned

BETA
thermal treatment
scanning electron microscopy
X-ray
transmission electron microscopy

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