Cobalt sulfide nanosheet/graphene/carbon nanotube nanocomposites as flexible electrodes for hydrogen evolution

• Main Authors: Peng, Shengjie, Li, Linlin, Han, Xiaopeng, Sun, Wenping, Srinivasan, Madhavi, Mhaisalkar, Subodh Gautam, Cheng, Fangyi, Yan, Qingyu, Chen, Jun, Ramakrishna, Seeram
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2015
• Subjects: DRNTU::Science::Chemistry::Organic chemistry::Carbanions
• Online Access: https://hdl.handle.net/10356/103932; http://hdl.handle.net/10220/24639
• Institution: Nanyang Technological University

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.