3D graphene preparation via covalent amide functionalization for efficient metal-free electrocatalysis in oxygen reduction.

ABSTRACT: 3D and porous reduced graphene oxide (rGO) catalysts have been prepared with sp³-hybridized 1,4-diaminobutane (sp³-DABu, rGO-sp³-rGO) and sp²-hybridized 1,4-diaminobenzene (sp²-DABe, rGO-sp²-rGO) through a covalent amidation and have employed as a metal-free electrocatalyst for oxygen reduction reaction (ORR) in alkaline media. Both compounds have used as a junction between functionalized rGO layers to improve electrical conductivity and impart electrocatalytic activity to the ORR resulting from the interlayer charge transfer. The successful amidation and the subsequent reduction in the process of catalyst preparation have confirmed by X-ray photoelectron spectroscopy. A hierarchical porous structure is also confirmed by sur

SUBMITTER: Ahmed MS 

PROVIDER: S-EPMC5327434 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature