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Sulfur-doped porous reduced graphene oxide hollow nanosphere frameworks as metal-free electrocatalysts for oxygen reduction reaction and as supercapacitor electrode materials.

Chen,X, Chen,X, Xu,X, Yang,Z, Liu,Z, Zhang,L, Xu,X, Chen,Y and Huang,S 2014, Sulfur-doped porous reduced graphene oxide hollow nanosphere frameworks as metal-free electrocatalysts for oxygen reduction reaction and as supercapacitor electrode materials., Nanoscale, vol. 6, no. 22, pp. 13740-13747, doi: 10.1039/c4nr04783d.

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Title Sulfur-doped porous reduced graphene oxide hollow nanosphere frameworks as metal-free electrocatalysts for oxygen reduction reaction and as supercapacitor electrode materials.
Author(s) Chen,X
Chen,X
Xu,X
Yang,Z
Liu,Z
Zhang,L
Xu,X
Chen,YORCID iD for Chen,Y orcid.org/0000-0002-7322-2224
Huang,S
Journal name Nanoscale
Volume number 6
Issue number 22
Start page 13740
End page 13747
Total pages 8
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2014-11-21
ISSN 2040-3372
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
RECENT PROGRESS
CATHODE CATALYST
CARBON
NITROGEN
PERFORMANCE
STORAGE
NANOMATERIALS
COMPOSITES
CONVERSION
FOAMS
Summary Chemical doping with foreign atoms is an effective approach to significantly enhance the electrochemical performance of the carbon materials. Herein, sulfur-doped three-dimensional (3D) porous reduced graphene oxide (RGO) hollow nanosphere frameworks (S-PGHS) are fabricated by directly annealing graphene oxide (GO)-encapsulated amino-modified SiO2 nanoparticles with dibenzyl disulfide (DBDS), followed by hydrofluoric acid etching. The XPS and Raman spectra confirmed that sulfur atoms were successfully introduced into the PGHS framework via covalent bonds. The as-prepared S-PGHS has been demonstrated to be an efficient metal-free electrocatalyst for oxygen reduction reaction (ORR) with the activity comparable to that of commercial Pt/C (40%) and much better methanol tolerance and durability, and to be a supercapacitor electrode material with a high specific capacitance of 343 F g(-1), good rate capability and excellent cycling stability in aqueous electrolytes. The impressive performance for ORR and supercapacitors is believed to be due to the synergistic effect caused by sulfur-doping enhancing the electrochemical activity and 3D porous hollow nanosphere framework structures facilitating ion diffusion and electronic transfer.
Language eng
DOI 10.1039/c4nr04783d
Field of Research 100708 Nanomaterials
100706 Nanofabrication, Growth and Self Assembly
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID DP130102311
Copyright notice ©2014, The Royal Society of Chemistry
Persistent URL http://hdl.handle.net/10536/DRO/DU:30069232

Document type: Journal Article
Collection: Institute for Frontier Materials
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