Facile synthesis of copper selenide with fluffy intersected-nanosheets decorating nanotubes structure for efficient oxygen evolution reaction

摘要

Rational nanostructure design is the key point to prepare catalysts with superior catalytic performance, and tedious preparation method limits them large-scale application. Here, a Cu2Se with fluffy intersected-nanosheets decorating nanotubes structure were prepared by a simple and rapid solution-immersion method at room temperature. The hollow hierarchical structure on a good conductor Cu foam (CF) enlarges surface available sites, enhances the conductivity of electrode materials, then endowing the catalyst with quick charge/mass transportation and favorable oxygen evolution reaction (OER) performance. In alkaline medium, our as-prepared Cu2Se/CF electrode demonstrates high OER performance, especially for lower overpotential (200 mV at 10 mA cm(-2)) compared with the previously reported Cu-based catalysts. Moreover, the Cu2Se catalyst could afford galvanostatic test of 10 mA cm(-2) test over 12 h and present superior OER tolerance. These results indicate that the Cu2Se catalyst via cost efficiency and efficient solution-immersion method could be applied to large-scale efficient OER. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.