Cobalt Sulfide Nanosheet/Graphene/Carbon Nanotube Nanocomposites as Flexible Electrodes for Hydrogen Evolution

作者：Shengjie Peng, Linlin Li, Xiaopeng Han, Wenping Sun, Madhavi Srinivasan, Subodh G. Mhaisalkar, Fangyi Cheng, Qingyu Yan, Jun Chen, Seeram Ramakrishna · 发表于：Angewandte Chemie International Edition · 年份：2014 · DOI：10.1002/anie.201408876 · 被引用次数：427 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Supercapacitor Materials and Fabrication

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.