Mn-doped CoSe2 nanosheets as high-efficiency catalysts for the oxygen evolution reaction.

In this work, we introduce for the first time an aqueous solution method followed by a selenization step to prepare Mn-doped CoSe2 nanosheets supported on nickel foam for the oxygen evolution reaction. These findings provide us highly efficient electrocatalysts instead of noble metal catalysts for the oxygen evolution reaction.

Construction of 3D Si@Ti@TiN thin film arrays for aqueous symmetric supercapacitors.

We report the preparation of 3D binder-free Si@Ti@TiN thin film array electrodes for supercapacitors using deep silicon etching and magnetron sputtering for the first time. This work not only offers the 3D array structure of Si@Ti@TiN thin films, but also paves a promising way for the construction of high-energy storage systems.