Jump to main content
Jump to site search


High-rate oxygen electroreduction over metal-free graphene foams embedding P–N coupled moieties in acidic media

Author affiliations

Abstract

High-efficiency metal-free carbon electrocatalysts for the oxygen reduction reaction (ORR) in acidic medium are still a great challenge for the commercialization of the fuel cell technology. Herein, high-performance metal-free P,N-doped carbon catalysts (P–N-GFs-HMPA) with the E1/2 potential of about 0.78 V are successfully prepared by constructing porous foams using graphene oxides and carbon nanotubes as building bricks and hexamethylphosphoric triamide (HMPA) as the special precursor of P and N. Impressively, the HMPA compound not only facilitated the remarkable increase in the content of both P and N in the carbon frameworks, but also offered high density of the coupled N–P moieties embedded in the graphene surface. Together with the optimized local structures including open porosities and high electron transportation capacity, this foam exhibits excellent electrocatalytic performance for the ORR in acidic medium. It is markedly superior to the previously reported metal-free carbons and comparable to Fe- or Co-based ORR carbon electrocatalysts. Thus we have successfully developed a high-performance metal-free ORR catalyst in acidic medium by precisely tuning the carbon structure through coupling with non-metal elements.

Graphical abstract: High-rate oxygen electroreduction over metal-free graphene foams embedding P–N coupled moieties in acidic media

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Sep 2017, accepted on 08 Feb 2018 and first published on 09 Feb 2018


Article type: Paper
DOI: 10.1039/C7TA08186C
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

    High-rate oxygen electroreduction over metal-free graphene foams embedding P–N coupled moieties in acidic media

    C. Li, Z. Chen, A. Kong, Y. Ni, F. Kong and Y. Shan, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C7TA08186C

Search articles by author

Spotlight

Advertisements