Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 46, Pages 12594-12599Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201408876
Keywords
cobalt sulfide; flexible electrodes; graphene; hybrid composites; hydrogen evolution reaction
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Funding
- NRF (Singapore) [CRP10-2012-06]
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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 10mAcm(-2) current density at about 142mV overpotentials and a high electrochemical stability.
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