Construction of Ni-rich, Ru-doped NiO nanoparticles with lattice strain for enhanced OER performance.

Manipulating the intrinsic activity of heterogeneous catalysts at the atomic level is an effective strategy to improve their electrocatalytic performances but remains a great challenge. Herein, we synthesized Ni-rich, Ru-doped NiO nanoparticles (Ru-NiO) through a two-step thermal treatment method. As an OER catalyst, the obtained Ru-NiO exhibited a low overpotential of 220 mV at a current density of 10 mA cm and a Tafel slope of 78 mV dec in alkaline media, outperforming NiO-based electrocatalysts prepared the conventional sol-gel synthesis method and conventional calcination synthesis method.

Fabrication of a vanadium-doped Ni-MOF with a hydrangea-like morphology as an electrode for high-performance supercapacitors.

In this work, we successfully fabricated a vanadium-doped Ni-MOF (NiV-MOF) with a three-dimensional hydrangea-like morphology a simple one-pot hydrothermal synthesis method. As an electrode material, the NiV-MOF demonstrated superior performance, achieving a specific capacitance of 1182 F g at a current density of 1 A g.

Multi-component carbon-based composites containing high crystallinity NiBDC as high-performance electrodes for supercapacitors.

Herein, we propose a strategy combining sol-gel hydrothermal growth and annealing treatment for preparing multi-component carbon-based composites with high crystallinity of NiBDC (C-Ni/NiO/NiBDC). The C-Ni/NiO/NiBDC can be used by both positive and negative materials to build a supercapacitor that shows superior capacitance over the wide potential range of 0-1.8 V, resulting from the high crystallinity of NiBDC and synergistic effect of NiBDC, Ni and NiO, as well as their mutual intimate interfacial contact.

Construction of Ni-rich nanograss arrays for boosting alkaline water oxidation.

The rational design of high-efficiency electrocatalysts for application in water oxidation in alkaline media remains a great challenge. In this paper, Ni-rich nanograss-like Mo-doped NiS/NiS/VS arrays grown on nickel foam (denoted as Mo-NiVS@NF) have been successfully constructed through a hydro/solvothermal method. Interestingly, Mo-NiVS@NF exhibits superior catalytic OER performance, needing an overpotential of 217 mV to drive a current density of 10 mA cm, outperforming most previously reported NiS-based electrocatalysts.