High-performance composite cathodes for Alkaline electrolysis of water

A procedure for preparing and modifying composite electrode materials, allowing preparation of high-performance Ni-based catalysts for water electrolyzers with alkaline electrolyte, is reported. Electrodes for cathodic process, fabricated using this procedure, allow the power consumption for hydrogen production in alkaline water electrolyzers to be considerably reduced relative to known analogs used in Russia and other countries.     

Synthesis and electrocatalytic activity of palladium nanoparticles on porous silicon

Palladium was combined with porous silicon into catalytically active functional electrode nanocomposites. Palladium nanoparticles were examined by transmission electron microscopy and atomic force microscopy; their catalytic activity was estimated using cyclic voltammetry.     

Nanocatalysts of Palladium on Combined Matrices-Supports for Portable Sources of Electric Current

Kinetics and Catalysis - Palladium nanocomposites on combined supporting matrices (Nafion–carbon nanotubes (CNT)) are synthesized. The functional characteristics of the materials are studied...     

Thermal Conductivity of Polymer Composite Material Based on Phenol-Formaldehyde Resin and Boron Nitride

Russian Physics Journal - The paper presents the results of studies of thermal conductivity, structure, and physico-chemical properties of samples of polymer composite material based on...     

Structural and Electrochemical Characteristics of Lithiated Manganese Oxides

An LiMn₂O₄ spinel of a poorly ordered structure is produced by subjecting MnO₂ + LiOH and MnO₂ + LiOH + 5 wt % Cr₂O₃ mixtures to plastic deformation at 1–2 GPa and then annealing them at 400°C. The size of individual particles is 10–100 nm. Cathodes based on chromium-modified spinels have a higher stability and a longer shelf life.     

Metal–Polymer Nanocomposites with Carbon Fillers for the Catalytic Oxidation of Formic Acid

Metal–polymer Pt–Pd nanocomposites on a Nafion polymer membrane modified with carbon nanotubes and carbon black are synthesized by the chemical reduction of ions in aqueous organic solutions of reverse microemulsions. The functional characteristics of the nanocomposites are studied by cyclic voltammetry and atomic force microscopy. The synthesized nanocomposites exhibit strong catalytic activity in the formic acid oxidation reaction. It is found that, at the optimum ratio of platinum metals, the catalytic activity of the metal–polymer composites is higher than that of the carbon nanocomposites.     

Metallopolymer nanocomposites based on platinum nanoparticles for chemical fuel cells

Platinum nanoparticles were synthesized by radiation chemical reduction in solutions of reverse micelles for the modification of Nafion films. The effect of the degree of solubilization and sizes of water pools of micelles on nanoparticle formation was shown. The platinum nanoparticle size in the polymer matrix does not exceed 10 nm.     

Synthesis and catalytic activity of platinum/porous silicon nanocomposites

Physicochemical characteristics of the functional electrode nanocomposites based on porous silicon with platinum nanoparticles were investigated with the use of electron microscopy, X-ray diffraction, and cyclic voltammetry. It is established that a decrease in the platinum nanoparticle size leads to an increase in catalytic activity of nanocomposites in the reactions of electrocatalytic oxygen reduction and hydrogen oxidation.     

Catalysts with platinum–palladium nanoparticles on polymer matrix supports

The platinum–palladium/Nafion metal–polymer nanocomposites were synthesized by the chemical reduction of ions in the aqueous organic solutions of inverted microemulsions. The functional characteristics of the nanocomposites were studied by cyclic voltammetry, atomic force microscopy, and scanning electron microscopy. The nanocatalysts obtained exhibited high activity in the reactions of oxygen reduction and hydrogen oxidation. The influence of synthesis conditions on the catalytic activity of the metal–polymer nanocomposites was studied.