Multi-dimensional collaboration promotes the catalytic performance of 1D MoO3 nanorods decorated with 2D NiS nanosheets for efficient water splitting
The capability of manipulating the heterostructures is of great importance to achieve high-performance electrocatalysts for direct water splitting devices with excellent activity toward hydrogen production. Herein, a novel top-down strategy involved with an in-situ transformation of one-dimensional (1D) MoO3 nanorod arrays grafted with two-dimensional (2D) NiS nanosheets supported on the skeleton of three-dimensional (3D) nickel foam is proposed. Namely, a heterostructured electrocatalyst on the Ni foam with MoO3 nanorod arrays decorated with the NiS nanosheets is synthesized by a facile hydrothermal method followed by one-step sulfidation treatment. Experimental analysis confirms that such novel composite futures the merits of a great quantify of accessible active sites, unique distribution of three different spatial dimensions, accelerated mass/electron transfer ability, as well as the synergistic effect of components, which exhibit impressive electrocatalytic properties toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Furthermore, an advanced water splitting electrolytzer through expropriating NiS/MoO3/NF as both anodic and cathodic working electrode is assembled, which merely requests a low cell voltage of 1.56 V to afford a 10 mA cm-2 water splitting current density in the basic electrolyte, being outperformed to that of previous reported electrocatalysts and even then the state-of-art electrocatalysts. More significantly, this work provides a new sight to revolutionize to the current heterostructured electrocatalysts design for large-scale commercial production of hydrogen through direct water splitting devices.