Polydopamine-coated graphene nanosheets as efficient electrocatalysts for oxygen reduction reaction. Issue 29 (30th April 2018)

• Record Type: Journal Article
• Authors: Wang, Dan-Dan; Gao, Xiuli; Zhao, Lianming; Zhou, Jin; Zhuo, Shuping; Yan, Zifeng; Xing, Wei
• Is Part Of: RSC advances. Volume 8:Issue 29(2018)
• Page Start: 16044
• Page End: 16051
• Publication Date: 2018-04-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra01027g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Polydopamine-coated graphene nanosheets show excellent electrocatalytic activity towards oxygen reduction reaction. Abstract : Polydopamine-modified graphene (G-PDA) materials were synthesized by in situ polymerization of a dopamine monomer on the surface of graphene oxide. X-ray photoelectron spectroscopy (XPS) has confirmed that new N-containing functional groups are formed during the synthesis process, which result in the excellent electrocatalytic activity of the composite towards ORR in terms of onset potential, number of electron transferred and limiting current density. The electrocatalytic activity of the optimized G-PDA sample is better than N-doped graphene and comparable to the commercial 20 wt% Pt/C catalyst. Furthermore, compared with the Pt-based catalysts, the G-PDA showed superior stability and methanol resistance, which favored its practical applications in fuel cells.