Jump to main content
Jump to site search


Enhancement mechanism of sulfur dopants on the catalytic activity of N and P co-doped three-dimensional hierarchically porous carbon as a metal-free oxygen reduction electrocatalyst

Author affiliations

Abstract

Doping carbon networks with multi-heteroatoms is one of the most effective ways to achieve a carbon-based metal-free electrocatalyst with a superior activity for oxygen reduction reaction (ORR). Herein, multi-heteroatom doped three-dimensional hierarchically micro/mesoporous carbon was synthesized as an efficient metal-free electrocatalyst towards ORR by pyrolyzing thiourea (THU) with nitrogen- and phosphorus-doped (N- and P-doped) hierarchically porous carbon networks derived from cattle bone. The obtained sulfur, nitrogen and phosphorus ternary-doped (S, N and P ternary-doped) carbon material has both a high porosity for effective mass transport of ORR reactants and abundant surface active sites for efficient ORR. As identified by X-ray absorption near edge structure spectroscopy, the S dopant in the reduced form (SRed) plays a major role during the ORR catalytic process. When used as an ORR electrocatalyst, the S, N and P ternary-doped carbon with the highest content of SRed outperformed the commercial Pt/C electrocatalyst in alkaline electrolytes with a superior electrocatalytic activity (∼40 mV higher half-wave potential), outstanding electrochemical durability and a good anti-poisoning capability. This work presents an effective approach for the design and synthesis of efficient metal-free ORR electrocatalysts from earth-abundant cattle bone and analogues.

Graphical abstract: Enhancement mechanism of sulfur dopants on the catalytic activity of N and P co-doped three-dimensional hierarchically porous carbon as a metal-free oxygen reduction electrocatalyst

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Jul 2019, accepted on 20 Aug 2019 and first published on 21 Aug 2019


Article type: Paper
DOI: 10.1039/C9CY01387C
Catal. Sci. Technol., 2019, Advance Article

  •   Request permissions

    Enhancement mechanism of sulfur dopants on the catalytic activity of N and P co-doped three-dimensional hierarchically porous carbon as a metal-free oxygen reduction electrocatalyst

    Y. Zan, Z. Zhang, M. Dou and F. Wang, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C9CY01387C

Search articles by author

Spotlight

Advertisements