Issue 1, 2019

Uniform nanoporous graphene sponge from natural polysaccharides as a metal-free electrocatalyst for hydrogen generation

Abstract

Structuring of graphene as graphene sponges in the submicrometric scale has been achieved by using silica spheres (80 nm diameter) as hard templates and chitosan or alginate as precursor of defective N-doped or undoped graphene, respectively. The resulting defective N-doped graphene sponge exhibits a remarkable activity and stability for hydrogen evolution reaction with onset at 203 mV for a current density of 0.5 mA cm−2 with a small Tafel plot slope of 69.7 mV dec−1. In addition, the graphene sponge also exhibits a high double layer capacitance of 11.65 mF cm−2. Comparison with an analogous N-doped graphene sample shows that this electrochemical properties derive from the spatial structuring and large surface area.

Graphical abstract: Uniform nanoporous graphene sponge from natural polysaccharides as a metal-free electrocatalyst for hydrogen generation

Supplementary files

Article information

Article type
Paper
Submitted
22 окт 2018
Accepted
06 дек 2018
First published
21 дек 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 99-106

Uniform nanoporous graphene sponge from natural polysaccharides as a metal-free electrocatalyst for hydrogen generation

J. Niu, A. Domenech-Carbó, A. Primo and H. Garcia, RSC Adv., 2019, 9, 99 DOI: 10.1039/C8RA08745H

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