A5044168581- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Electrochemical sensors and biosensors
- Nanomaterials for catalytic reactions
- Catalytic Processes in Materials Science
- Hydrogen Storage and Materials
- Electrodeposition and Electroless Coatings
- Thermodynamic and Structural Properties of Metals and Alloys
- Advanced battery technologies research
- nanoparticles nucleation surface interactions
- Catalysis and Hydrodesulfurization Studies
- Conducting polymers and applications
- Nuclear Materials and Properties
- Lignin and Wood Chemistry
Center for Physical Sciences and Technology
2019-2025
Institute of Catalysis and Petrochemistry
2019-2020
The perfect strategy for the generation of green and renewable hydrogen (H2) fuels is direct electrocatalytic splitting plentiful seawater rather than scarce freshwater. One half-reactions taking place during oxygen evolution (OER). However, OER affected by slow four-electron transfer kinetics as well competitive chlorine reactions (CERs) in seawater. To overcome kinematic barriers achieve an excellent overall performance splitting, we herein report a facile, low-cost, one-step fabrication...
In this study we present an application of wood biomass - alder char as the carbon precursor for synthesis novel and sustainable nitrogen-doped activated supported nickel nanoparticle catalyst (AWC-Ni-N) hydrazine oxidation. For comparison, wood-based material doped with nitrogen only (AWC-N) was also synthesized. Extensive characterization, including SEM, Raman spectroscopy, XPS, XRD revealed catalysts' microstructure properties. Electrochemical testing demonstrated that AWC-Ni-N...
In this study we present an application of wood biomass—alder char—as the carbon precursor for synthesis novel and sustainable nitrogen-doped activated-carbon-supported nickel nanoparticle catalyst (AWC-Ni-N) hydrazine oxidation. For comparison, wood-based material doped with nitrogen only (AWC-N) was also synthesized. Extensive characterization, including SEM, Raman spectroscopy, XPS, XRD revealed catalysts’ microstructure properties. Electrochemical testing demonstrated that AWC-Ni-N...
In this study, a platinum-coated Ni foam catalyst (denoted PtNi/Ni foam) was investigated for the oxidation of formate reaction (FOR) in an alkaline medium. The fabricated via two-step procedure, which involved electroless deposition layer using sodium hypophosphite as reducing agent and subsequent electrodeposition platinum layer. demonstrated enhanced electrocatalytic activity FOR medium compared to Ni/Ni pure Pt electrode. Moreover, promoted at more negative potentials than This...
AuCeO2/C and Au/C catalysts were obtained by adsorption of AuNPs on the CeO2/C pure carbon (C) substrates from an Au colloidal solution. It has been found that ca. 50 nm in size adsorbed surfaces C; however, electrocatalytic activity investigated was different. Ethylene glycol oxidation current density values are 3 times higher catalyst as compared to those bare catalyst. Moreover, showed more positive onset potentials, well mixed-kinetic-diffusion region towards oxygen reduction reaction...
In this study, sodium borohydride oxidation has been investigated on the platinum nanoparticles modified copper/titanium catalysts (PtNPsCu/Ti), which were fabricated by employing electroless copper plating and galvanic displacement technique. ICP-OES, XRD, FESEM, EDX have used to characterize PtNPsCu/Ti catalysts' composition, structure, surface morphology. The of was examined using cyclic voltammetry chrono-techniques.
We present a synthesis route for the highly efficient nitrogen-doped activated carbon material ORR and supercapacitor application using “sweetwood lignin” precursor as source via thermochemical...
In this study, one-pot microwave-assisted synthesis was used to fabricate the graphene (GR)-supported PtCoM catalysts where M = Mn, Ru, and Mo. The with molar ratios of metals Pt:Co:Mn, Pt:Co:Ru, Pt:Co:Mo equal 1:3:1, 1:2:2, 7:2:1, respectively, were prepared. Catalysts characterized using Transmission Electron Microscopy (TEM). electrocatalytic activity GR-supported PtCoMn, PtCoRu, PtCoMo evaluated toward methanol oxidation in an alkaline medium employing cyclic voltammetry...
The electrochemical oxidation of glucose was investigated on the Co and CoB alloy coatings, which were deposited copper substrate (Cu) subsequently modified with a small amount Au nanocrystallites. catalysts prepared via simple electroless deposition method followed by spontaneous galvanic displacement from Au(III)-containing solution. activity coatings crystallites towards examined cyclic voltammetry method. It has been determined that crystallites, exhibit significantly higher for as...
In this study, the gold nanoparticles (AuNPs) without carbon support were prepared using well-known citrate reduction method. The supported AuNPs nanocomposites fabricated by two different approaches: chemical adsorption of from stabilized AuNP colloidal solution on powder surface and one-pot microwave-assisted synthesis. characterized scanning electron microscopy (SEM) inductively coupled plasma optical emission spectroscopy (ICP-OES). electrocatalytic activity catalysts was evaluated for...
In this study, the carbon powder supported gold nanoparticles composites (AuNPs/C) were prepared via chemical reduction method by employing sodium citrate or a complex mixture of glucose and ascorbic acid as reducing agents in presence small amounts different halide ions (Cl–, Br–, I–). The electrocatalytic activity synthesized was evaluated for electro-oxidation an alkaline medium using cyclic voltammetry, whereas morphology composition characterized field emission scanning electron...
The electrochemical stability and durability of ZnCo alloy thin layers deposited on the titanium surface (denoted as ZnCo/Ti) those modified by small amounts Au nanoparticles AuZnCo/Ti) prepared via metal deposition technique a simple galvanic displacement have been investigated in alkaline sodium borohydride (NaBH4) solutions. physical properties fabricated AuZnCo/Ti catalysts examined using field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDX)...
Herein, the electrochemical oxidation of glucose has been investigated on Co and CoB alloy coatings, which were deposited copper substrate (Cu) subsequently modified with a small amount Au nanocrystallites (termed as AuCo/Cu AuCoB/Cu catalysts), aim to use them anode catalysts for direct fuel cells (DGFCs). The have prepared via simple electroless deposition method followed by spontaneous galvanic displacement from Au(III)-containing solution. activity in an alkaline medium examined cyclic...
In this study, the synthesis of gold nanoparticles (AuNPs) supported nitrogen-doped activated carbon (N-doped C) nanocomposites and their application for electro-oxidation ethanol in an alkaline medium is presented. The AuNPs have been deposited on N-doped C material using chemical reduction with glucose ascorbic acid as reducing agents microwave-assisted synthesis. Scanning electron microscopy (SEM), transmission (TEM), Raman, X-ray diffraction (XRD) inductively coupled plasma optical...
In this study, 3D-structured NiMo coatings have been constructed via the widely used electrodeposition method on a Ti surface and decorated with very small Au crystallites by galvanic displacement (Au(NiMo)/Ti). The catalysts characterized using scanning electron microscopy, energy dispersive X-ray analysis, inductively coupled plasma optical emission spectroscopy. Different Au(NiMo)/Ti catalysts, which had loadings of 1.8, 2.3, 3.9 µgAu cm−2, were prepared. electrocatalytic activity was...