Bismuth oxyiodide microflower-derived catalysts for efficient CO electroreduction in a wide negative potential region.

It is of paramount importance to design and develop highly active and selective electrocatalysts for the CO2 reduction reaction. Herein, we obtained bismuth-based catalysts consisting of oxidized Bi2O2CO3 and metallic Bi featuring local shortened inter-layer Bi-Bi bonds from in situ reduction of bismuth oxyiodide (BiOI) microflowers, which showed over 90% formate faradaic efficiency in a wide negative potential region.

Simple Cadmium Sulfide Compound with Stable 95 % Selectivity for Carbon Dioxide Electroreduction in Aqueous Medium.

A simple cadmium sulfide nanomaterial is found to be an efficient and stable electrocatalyst for CO reduction in aqueous medium for more than 40 h with a steady CO faradaic efficiency of approximately 95 %. Moreover, it can realize a current density of -10 mA cm at an overpotential of -0.55 V on a porous substrate with similar selectivity.

N-Modified NiO Surface for Superior Alkaline Hydrogen Evolution.

Boosting the sluggish kinetics of the hydrogen evolution reaction in alkaline environments is key for the large-scale application of water-alkali and chlor-alkali electrolysis. In this study, nitrogen atoms are used to precisely modulate electrochemical active sites on the surface of nickel oxide with low-coordinated oxygen atoms, to achieve enhanced kinetics in alkaline hydrogen evolution. Theoretical and experimental results demonstrate that surface charge redistribution after modulation facilitates both the initial water dissociation step and the subsequent recombination of H from low-coordinated oxygen sites and desorption of OH from nickel sites, thus accelerating the overall hydrogen evolution process.

Metallic Ni P/Ni Co-Catalyst To Enhance Photocatalytic Hydrogen Evolution.

Metallic Ni P/Ni can be used as a co-catalyst to replace noble metal Pt for efficient photocatalytic hydrogen evolution, due to its excellent trapping-electron ability. The applications of metallic Ni P/Ni co-catalyst on CdS, Zn Cd S, TiO (Degussa P25) and g-C N are further confirmed, indicating its versatile applicability nature like Pt.

Enhancing alkaline hydrogen evolution reaction activity through Ni-Mn3O4 nanocomposites.

Developing efficient, stable and cost-effective electrocatalysts towards hydrogen production in alkaline environments is vital to improve energy efficiency for water splitting. In this work, we prepared Ni-Mn3O4 nanocomposites on Ni foam which exhibit an excellent hydrogen evolution reaction catalytic activity with a current density (j) of 10 mA cm(-2) at an overpotential (η) of 91 mV and show good stability in an alkaline medium.