In situ formed vanadium-oxide cathode coatings for selective hydrogen production

One-Step Electro-Precipitation of Nanocellulose Hydrogels on Conducting Substrates and Its Possible Applications: Coatings, Composites, and Energy Devices

“…Figure A shows a schematic description of HER with and without a barrier layer against ORR, which is an unwanted side reaction in this case. To prevent such loss, there have been extensive studies about protective coatings, mostly composed of amorphous oxide layer including chromium oxide, − titanium dioxide, nickel oxide, , silicon dioxide, − and vanadium oxide . Other than those, biopolymer-based hydrogels may be possible candidates as ORR protective layers, if permeable for water and smaller ions, but barriers for oxygen as shown in Figure A.…”

Catalyst overcoating engineering towards high-performance electrocatalysis

“…Metal oxides also find application in surface overcoating of metal oxide nanosheets, 144 porous and hollow metal-based nanostructures 145 and metal thin film electrodes. [146][147][148][149] For example, Wang et al 144 first constructed NiFe layered double hydroxide-coated nickel foam (NF@NiFe LDH) by hydrothermally treating NF in a solution of metal nitrates. CeO 2 NPs were then electrodeposited onto NF@NiFe LDH at a current density of 0.25 mA cm À2 in a three-electrode cell to yield the 3D selfsupporting NF@NiFe LDH/CeO x electrode catalyst (Fig.…”

A comparative performance analysis of stand-alone, off-grid solar-powered sodium hypochlorite generators

“…33,34 The non-ideality of faradaic efficiencies relies on two main mechanisms: (i) the competing oxygen evolution, due to the abundance of hydroxyl ions in solution, which is favored by high pH values but counteracted by the selectivity of the anodic coating; 35 (ii) the diffusion of oxidized hypochlorite species at the cathode, where they are back-reduced to chloride species, which could be restrained by introduction of external compounds (e.g. sodium dichromate 36,37 ).…”