Au-decorated CoOOH nanoplate hierarchical hollow structure for Plasmon-enhanced electrocatalytic water oxidation

The development of efficient oxygen evolution reaction (OER) catalysts is essential for the generation of renewable hydrogen. Earth-abundant material has been widely studied as a very promising metal catalyst. However, a single simple-typed Earth-abundant material is difficult to meet the requirement of activity. New chemical composite and catalytic method have been used to promote catalytic activity. Herein, novel gold nanoparticles decorated CoOOH nanoplate hierarchical hollow structure (Au/CoOOH) is synthesized for improving the electro-catalytic performance of water oxidation. Moreover, the photo-induced surface plasmon excited on gold nanoparticles can be also introduced to enhance the photo-assisted OER activity. The synergy of Au and CoOOH improves the charge excitation and transfer which increase the active sites markedly. A high turnover frequency (3.75 s^-1 at overpotential of 360 mV) and a low overpotential of 290 mV at current density of 10 mA·cm^−2 with the laser assisted have been achieved, an...