title: Cobalt sulfide nanosheet/graphene/carbon nanotube nanocomposites as flexible electrodes for hydrogen evolution.
abstract: Flexible three-dimensional (3D) nanoarchitectures have received tremendous interest recently because of their potential applications in wearable electronics, roll-up displays, and other devices. The design and fabrication of a flexible and robust electrode based on cobalt sulfide/reduced graphene oxide/carbon nanotube (CoS2 /RGO-CNT) nanocomposites are reported. An efficient hydrothermal process combined with vacuum filtration was used to synthesize such composite architecture, which was then embedded in a porous CNT network. This conductive and robust film is evaluated as electrocatalyst for the hydrogen evolution reaction. The synergistic effect of CoS2 , graphene, and CNTs leads to unique CoS2 /RGO-CNT nanoarchitectures, the HER activity of which is among the highest for non-noble metal electrocatalysts, showing 10 mA cm(-2) current density at about 142 mV overpotentials and a high electrochemical stability.
authors.affiliation: Centre for Nanofibers and Nanotechnology, National University of Singapore, Singapore, 117576 (Singapore).
authors.forename: Shengjie
authors.initials: S
authors.lastname: Peng
authors.forename: Linlin
authors.initials: L
authors.lastname: Li
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Han
authors.forename: Wenping
authors.initials: W
authors.lastname: Sun
authors.forename: Madhavi
authors.initials: M
authors.lastname: Srinivasan
authors.forename: Subodh G
authors.initials: SG
authors.lastname: Mhaisalkar
authors.forename: Fangyi
authors.initials: F
authors.lastname: Cheng
authors.forename: Qingyu
authors.initials: Q
authors.lastname: Yan
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Seeram
authors.initials: S
authors.lastname: Ramakrishna
keywords: cobalt sulfide; flexible electrodes; graphene; hybrid composites; hydrogen evolution reaction