A5017267000- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Machine Learning in Materials Science
- Catalytic Processes in Materials Science
- Advancements in Solid Oxide Fuel Cells
- Electrochemical sensors and biosensors
- Semiconductor materials and devices
- Catalysis and Hydrodesulfurization Studies
- Advanced Memory and Neural Computing
- Electron and X-Ray Spectroscopy Techniques
- Advanced Materials Characterization Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Catalysis and Oxidation Reactions
- Molecular Junctions and Nanostructures
- nanoparticles nucleation surface interactions
- Catalysts for Methane Reforming
- Surface and Thin Film Phenomena
- CO2 Reduction Techniques and Catalysts
- Conducting polymers and applications
- Carbon Nanotubes in Composites
- Electrodeposition and Electroless Coatings
- Computational Drug Discovery Methods
- Chemical and Physical Properties of Materials
Southern Federal University
2015-2024
Skolkovo Foundation
2020
Carbon-supported Pt catalysts prepared by the impregnation method in water−dimethyl sulfoxide (DMSO) solutions were investigated. Using X-ray diffraction (XRD) technique for estimation of particle size and shapes, we show that morphology Pt/C depends strongly on DMSO content solutions. The average particles reduces a shape nanocrystals changes from truncated octahedron to cuboctahedron eventually cube with increasing concentration reaction mixture. Antibate effects cause nonmonotonic...
The behavior of supported alloyed and de-alloyed platinum-copper catalysts, which contained 14-27% wt. Pt, was studied in the reactions methanol electrooxidation (MOR) oxygen electroreduction (ORR) 0.1 M HClO4 solutions. Alloyed PtCux/C catalysts were prepared by a multistage sequential deposition copper platinum onto Vulcan XC72 dispersed carbon support. De-alloyed PtCux-y/C materials pretreatment acid effects initial composition treatment condition on their composition, structure,...
Electrooxidation of methanol, ethanol, and formic acid was studied on three platinum-containing electrocatalysts: PtCu/C, Pt/(SnO2/C), Pt/C, Pt content being about 20 wt%. In all reactions, the integral specific activity catalysts, estimated from results cyclic voltammetry, grows in Pt/C < Pt/(SnO2/C) PtCu/C row. The influence reagent nature subjected to electrooxidation is manifested both difference absolute rate values corresponding decreasing order CH3OH > HCOOH C2H5OH, different...
PtM/C (M = Co, Ni, Cu, Ru) catalysts were prepared by wet-synthesis methods. The composition and structure of the synthesized materials estimated TXRF, XRD, TEM, HAADF-STEM, EDX, TGA/DSC According to CV LSV methods, PtCu/C material is characterized highest activity in ORR compared other studied. PtRu/C also exhibit MOR. Studying durability obtained bimetallic using accelerated stress testing has allowed for detection most promising materials, whose characteristics would be superior those...
Studying the ORR activity of platinum-based electrocatalysts is an urgent task in development materials for proton-exchange membrane fuel cells. The catalytic ink composition and formation technique a thin layer at RDE play significant role studying activity. use polymer ionomer provides viscosity as well proton conductivity. Nafion widely used research both MEA. search ionomers priority MEA components to replace Nafion. study also considers possibility using LF4-SK alternative ionomer....
New highly active electrocatalysts were obtained by depositing bimetallic Pt-Cu nanoparticles on the surface of an N-doped carbon support. The structural–morphological characteristics and electrochemical behavior catalysts studied. Using current stress testing protocols, their resistance to degradation was assessed in comparison with that a commercial Pt/C material. A combined approach catalyst synthesis consists alloying platinum copper doping support makes it possible obtain uniform...
In this study, we analyzed the durability of commercial Pt/C catalysts with platinum loading 20% and 40% using two different accelerated tests, i.e., Ar or O2 when bubbling electrolyte during testing. The structural analysis changes in morphology was performed by XRD TEM as well assessment degradation degree values specific surface area ORR activity, both, before after stress Regardless testing conditions, JM20 material established to degrade ESA catalytic activity a greater extent than...
Supported PtCu/C electrocatalysts containing core–shell bimetallic PtCu nanoparticles were synthesized by sequential chemical reduction of Cu2+ and Pt(IV) in a carbon suspension, prepared on the basis ethylene glycol–water solvent, then treated at different temperatures range from 250 to 350 °C. The structural characterization "as-prepared" those obtained after thermal treatments was performed transmission electron microscopy, X-ray diffraction, Pt L3- Cu K-edge extended absorption fine...
The presented study is concerned with a new multi-step method to synthesize PtCo/C materials based on composite CoxOy/C that combines the advantages of different liquid-phase synthesis methods. Based results studying at each stage TG, XRD, TEM, SEI, TXRF, CV and LSV methods, detailed overview sequential changes in catalyst composition structure presented. synthesized characterized by uniform distribution bimetallic nanoparticles about 3 nm size over surface support, which result its high ESA...
Bimetallic platinum-containing catalysts are deemed promising for electrolyzers and proton-exchange membrane fuel cells (PEMFCs). A significant number of laboratory studies commercial offers related to PtNi/C PtCo/C electrocatalysts. The behavior PtPd/C has been studied much less, although palladium itself is the metal closest platinum in its properties. Using a series characterization methods, this paper presents comparative study structural characteristics containing 38% wt. precious...
High-temperature oxidation processes of carbon microparticles Vulcan XC72 coated with platinum nanoparticles (Pt/C) were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The presence different specific temperature ranges in the support was shown to be due both peculiarities granulometric composition black microparticles, size, uneven spatial distribution pores on surface support. correlation between length a section thermograms fraction poorly can used...
Behavior of supported alloyed and de-alloyed platinum-copper catalysts, which contained 14% - 27% wt. Pt, was studied in the reactions methanol electrooxidation (MOR) oxygen electroreduction (ORR) 0.1 M HClO4 solutions. Alloyed PtCux/C catalysts were prepared by a multistage sequential deposition copper platinum onto Vulcan XC72 dispersed carbon support. De-alloyed PtCux-y/C materials pretreatment acid The effects initial composition treatment condition on their composition, structure,...
A carbon supported PtCux/C catalyst, which demonstrates high activity in the oxygen electroreduction and methanol electrooxidation reactions acidic media, has been obtained using a method of chemical reduction Pt (IV) Cu (2+) liquid phase. It found that potential range preliminary voltammetric activation catalyst significant effect on de-alloyed material reaction (ORR). High-resolution transmission electron microscopy (HRTEM) there are differences structures as-prepared materials activated...