Self-growth-templating synthesis of 3D N,P,Co-doped mesoporous carbon frameworks for efficient bifunctional oxygen and carbon dioxide electroreduction Academic Article uri icon

abstract

  • © 2017 The Royal Society of Chemistry. Although mesopore designs are expected to play a key role in exploring electrocatalytic properties of carbons, facile preparation of mesoporous carbons (MPCs) with efficient dopants to enable high performance remains a great challenge. Herein, we for the first time introduce a self-growth-templating concept for the fabrication of three-dimensional (3D) N,P,Co-doped MPC frameworks, simply through pyrolysis of vitamin B12 in NaCl assembly-enclosed nanoreactors. The route realizes the controllable formation of mesoporous templates and elimination of the templates, as well as in situ doping of N, P, and Co into MPCs in a one-step enclosed-space-assisted pyrolysis process. The highly mesoporous architecture not only enhances mass transportation but also provides the 3D electrocatalytic surface to expose highly active N,P,Co-induced dopants. These features endow MPCs with excellent activity as bifunctional electrocatalysts in oxygen reduction (E1/2 of 0.85 V, JK of 51 mA cm-2 at -0.71 V and Tafel slope of 53 mV dec-1) and CO2 reduction reactions (overpotential of -0.19 V, maximum FE of 62% for CO and Tafel slope of 129 mV dec-1), coupled with high electrochemical stability in aqueous electrolytes. We expect that the self-constructing vision can afford useful insights to guide the development of other advanced mesoporous materials other than carbon for broad applications.

altmetric score

  • 0.25

author list (cited authors)

  • Pan, F., Liang, A., Duan, Y., Liu, Q., Zhang, J., & Li, Y.

citation count

  • 36

publication date

  • January 2017