6533b836fe1ef96bd12a0bb6
RESEARCH PRODUCT
Uniform nanoporous graphene sponge from natural polysaccharides as a metal-free electrocatalyst for hydrogen generation
Jinan NiuJinan NiuHermenegildo GarcíaAntonio Doménech-carbóAna Primosubject
NanoporousGeneral Chemical Engineering02 engineering and technologyGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnologyElectrocatalyst01 natural sciences0104 chemical sciencesQUIMICA ORGANICAPolitical scienceEconomic historyChristian ministry0210 nano-technologydescription
[EN] 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-01 | RSC Advances |