A rational design for oxygen evolution reaction (OER) catalysts is pivotal to the overall efficiency of water electrolysis. Much work has been devoted understanding cation leaching and surface reconstruction very active electrocatalysts, but little on intentionally promoting in a controlled fashion. We now report controllable anodic Cr CoCr2O4 by activating pristine material at high potential, ...

Inorganic pigments based on AB2O4 (A = Co, Ni; B Cr, Al) spinel structures with green colour were successfully synthesised by the polymeric route. The effect of substitution trivalent and divalent cations structural, optical morphological properties was investigated. nanopowders examined using thermogravimetry-di?erential thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron mic...

In the present work, cobalt-chromite-based pigment Co1-xNixCr2O4 chromate powder and nanoparticles with various transition metal concentrations (x = 0.2, 0.4, 0.6, 0.8) were manufactured by applying aqueous synthesis approaches sol–gel routes. XRD analysis of shows that all samples formulated method crystalline a spinel structure. Chromites show green color higher nickel concentration, while Co...

The application of conductive coatings on ferritic stainless steel can decrease electrical conductivity. Theaim of this research was to investigate the electrical conductivity of cobalt coated AISI 430 ferritic stainlesssteel by pack cementation technique. Coated coupons were analyzed using scanning electron microscopy(SEM). Electrical conductivity of the coated substrates was measured as a fun...

A new class of near-infrared (NIR) reflectance pigments based on Co 1?x Mg x Cr 2?y Al y O 4 (x = 0–1 and 0–2) was synthesised using the Pechini-type sol-gel process. The developed powders were characterised by thermogravimetry differential scanning calorimetry, X-ray diffraction (XRD), ultraviolet–visible diffuse spectroscopy, colour Commission Internationale del'Eclairage (CIE) 1976 (L * a b ...

The article describes the effect of heat treatment on structural-phase state and properties a multilayer Cr-Al-Co-Y coating obtained by magnetron sputtering. Heat was carried out at 400, 800 1000 °C. study microstructure electron microscopy with energy dispersive analysis powder X-ray diffraction. surface samples studied atomic force microscopy. thickness Co-Cr-Al-Y coatings 1.5–1.7 ± 0.2 µm. a...

Chuanwei Zhang,1,2 Sumanta Tewari,1,3 John Toner,4 and S. Das Sarma1 1Department of Physics, Condensed Matter Theory Center, University of Maryland, College Park, Maryland 20742, USA 2Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USA 3Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA 4Department of Physics ...