Synthesis of an exceptionally highly efficient NiS–CdS hybrid photocatalyst for H₂ evolution.

We present an experimental study on the influence of sub-stoichiometric WO_3−x phase upon gas sensing performance. Our work shows that the sub-stoichiometric WO_3−x can be used to enhance the low temperature sensing performance.

Ultrafine molybdenum sulfide (MoS2) nanocrystals are grown on a porous cobalt (Co) foam current collector by atomic layer deposition (ALD) using molybdenum hexacarbonyl and hydrogen sulfide as precursors. When used to catalyze the oxygen evolution reaction (OER), the optimal Co@MoS2 electrode, even with a MoS2 loading as small as 0.06 mg cm−2, exhibits a large cathodic shift of ca. 200 mV in the onset potential (the potential at which the current density is 5 mA cm−2), a low overpotential of only 270 mV to attain an anodic current density of 10 mA cm−2, much smaller charge transfer resistance and substantially improved long-term stability at both low and high current densities, with respect to the bare Co foam electrode, showing substantial promise for use as an efficient, low-cost and durable anode in water electrolyzers.

A facile synthesis method to optimize the synergistic catalytic effect between NiS and MoS₂ for highly efficient overall water splitting performance.

Cation-exchange method is developed to synthesize vertically aligned NiS/SnS ₂ porous nanowalls for aqueous battery–supercapacitor hybrid devices with ultrahigh specific capacity.