Hierarchical carbon nanopapers coupled with ultrathin MoS2 nanosheets: Highly efficient large-area electrodes for hydrogen evolution

摘要

Design of large-area hybrid paper for directly using as electrodes in hydrogen evolution reaction (HER) can provide an efficient approach for the extension of electrochemical hydrogen industry. Here we construct MoS2 decorated hybrid carbon papers (MOS2-CP5) that consist of tiny MoS2 nanosheets coupled with 3D graphene-carbon nanofiber papers. MoS2-CPs can function as largearea working electrodes for HER with an overpotential (at 10 mA/cm(2)) of 80 mV in acid media and 186 mV in basic media, surpassing the Mo-based catalysts ever reported thus far in acid and basic solution respectively. It is the highly coupled interface of carbon frameworks and MoS2 components that resulted in the formation of patched and few-layer MoS2 nanosheets with rather small size and thus ensured the abundance of exposed active edge sites. Stability tests through long-term potential cycles and extended electrolysis confirm the outstanding durability of MoS2-CPs in both acid and basic electrolytes. (C) 2015 Elsevier Ltd. All rights reserved.