A5001295608- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Chromium effects and bioremediation
- Pigment Synthesis and Properties
- Advancements in Battery Materials
- Adsorption and biosorption for pollutant removal
- Extraction and Separation Processes
- Catalytic Processes in Materials Science
- Analytical chemistry methods development
Aristotle University of Thessaloniki
2017-2022
In this work we have used both plain titania nanotubes, TNTs, and their reduced black analogues, bTNTs, that bear metallic conductivity (prepared by solid state reaction of TNTs with CaH2 at 5000C for 2 h), as catalyst supports the oxygen evolution (OER). Ir has been subsequently deposited on them galvanic replacement electrodeposited Ni Ir(IV) chloro-complexes; was followed electrochemical anodization to IrO2. By carrying out preparation in either two or one steps, were able produce...
A galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces high-aspect-ratio black TiO
IrO2/Ir(Ni) film electrodes of variable Ni content have been prepared via a galvanic replacement method, whereby surface layers pre-deposited are replaced by Ir, followed electrochemical anodization. Electrodeposition on glassy carbon electrode support has carried out at constant potential and the charge electrodeposited controlled so as to investigate effect precursor layer thickness electrocatalytic activity corresponding IrO2/Ir(Ni)/GC for oxygen evolution reaction (OER). After their...
The oxidation of methanol is studied at TiO2-supported Pt electrodes varied high surface area carbon content (in the 30-5% w/w range) and C÷Ti atom ratio 3.0-0.4 ratio). Pt-TiO2 catalyst prepared by a photo-deposition process C nanoparticles (Vulcan XC72R) are added simple ultrasonic mixing. optimum for electro-oxidation found to be 1.5, resulting from interplay properties (increased electronic conductivity adsorption), those TiO2 (synergistic effect on photo-activity), as well film...
Optimized Pt-based methanol oxidation reaction (MOR) anodes are essential for commercial direct fuel cells (DMFCs) and electrolyzers hydrogen production. High surface area Ti supports known to increase Pt catalytic activity utilization. has been deposited on black titania nanotubes (bTNTs), felts and, comparison, foils by a galvanic deposition process, whereby Pt(IV) from chloroplatinate solution is spontaneously reduced metallic (at 65 °C) onto chemically (by CaH2) TNTs (resulting in...
A combination of thermal (500–750 °C in air) and hydrometallurgical (acidic) treatments have been applied to dried tannery sludge, resulting the initial conversion Cr(III) Cr(VI) its subsequent leaching as wastewater with high concentration content (3000–6000 mg/L), presenting an extraction efficiency over 90%. The optimal electrochemical conditions for reduction respect acid kind were established by applying appropriate rotating disc electrode (RDE) experiments, using a glassy carbon (GC)...
The Cover Feature shows the spontaneous galvanic deposition of metallic Pt nanoparticles on top, but also inner TiO2 nanotube surfaces. High-aspect-ratio and heavily reduced serves as sacrificial template during this electroless deposition. A high-performing stable hydrogen evolution cathode in acidic media is demonstrated prepared via minimal engineering low noble metal loadings. More information can be found Full Paper by A. Touni et al.