One-dimensional hierarchical nanostructures of NiCoO, NiCoS and NiCoSe with superior electrocatalytic activities toward efficient oxygen evolution reaction.

Oxygen evolution reaction (OER), a sluggish multistep process in electrochemical water splitting, is still a challenging issue to achieve with cheap, earth-abundant non-precious and non-polluting materials. In this work, three different electrocatalysts, specifically NiCoO, NiCo S, and NiCo Se synthesized by simple hydrothermal process, show excellent OER activity. This report not only projects OER performances but also demonstrates a modified method for the transformation of NiCoO to NiCo S and NiCo Se via sulfidation and selenization reactions.

Effect of MoO3 on the synthesis of boron nitride nanotubes over Fe and Ni catalysts.

Synthesis of boron nitride nanotubes at reduced temperature is important for industrial manufactures. In this study boron nitride nanotubes were synthesized by thermal evaporation method using B/Fe2O3/MoO3 and B/Ni2O3/MoO3 mixtures separately with ammonia as the nitrogen source. The growth of boron nitride nanotubes occurred at 1100 degrees C, which was relatively lower than other metal oxides assisted growth processes requiring higher than 1200 degrees C.