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Cobalt Sulfide Nanosheet/Graphene/Carbon Nanotube Nanocomposites as Flexible Electrodes for Hydrogen Evolution
Author(s) -
Peng Shengjie,
Li Linlin,
Han Xiaopeng,
Sun Wenping,
Srinivasan Madhavi,
Mhaisalkar Subodh G.,
Cheng Fangyi,
Yan Qingyu,
Chen Jun,
Ramakrishna Seeram
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201408876
Subject(s) - graphene , nanosheet , materials science , electrocatalyst , nanocomposite , carbon nanotube , nanotechnology , oxide , electrode , cobalt sulfide , electrochemistry , cobalt , chemical engineering , sulfide , chemistry , engineering , metallurgy
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 (CoS 2 /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 CoS 2 , graphene, and CNTs leads to unique CoS 2 /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.