A5082588667- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Catalytic Processes in Materials Science
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Advanced Nanomaterials in Catalysis
- ZnO doping and properties
- Ga2O3 and related materials
- Electrocatalysts for Energy Conversion
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Perovskite Materials and Applications
Friedrich-Alexander-Universität Erlangen-Nürnberg
2020-2025
Regional Centre of Advanced Technologies and Materials
2025
Palacký University Olomouc
2025
Single-atom (SA) catalysis is a novel frontline in the field due to often drastically enhanced specific activity and selectivity of many catalytic reactions. Here, an atomic-scale defect engineering approach form control traps for platinum SA sites as co-catalyst photocatalytic H2 generation described. Thin sputtered TiO2 layers are used model photocatalyst, compared more frequently (001) anatase sheets. To stable platinum, reduced Ar/H2 under different conditions (leading but defined Ti3+...
With recent advances in the field of single-atoms (SAs) used photocatalysis, an unprecedented performance atomically dispersed co-catalysts has been achieved. However, stability and agglomeration SA on semiconductor surface may represent a critical issue potential applications. Here, photoinduced destabilization Pt SAs benchmark photocatalyst, TiO2 , is described. In aqueous solutions within illumination timescales ranging from few minutes to several hours, light-induced ensembles (dimers,...
Trapping sites in single atom (SA) catalysts are critical to the stabilization and reactivity of isolated atoms. Herein, we show that anchoring Pt SAs on TiO2 nanosheets is strongly aided by lattice incorporated fluorine species. Tailoring speciation a key factor for uniform stable dispersion high efficiency SA co-catalyzed photocatalytic H2 production. Fluorine-stabilized uniformly dispersed (001) surface can provide remarkable activity (a production rate 45.3 mmol h–1 mg–1 65 mW/cm2 365 nm...
Abstract The engineering of the electron transport layer (ETL)/light absorber interface is explored in perovskite solar cells. Single‐crystalline TiO 2 nanorod (NR) arrays are used as ETL and methylammonium lead iodide (MAPI) light absorber. A dual surface modification investigated, namely by a TiCl 4 treatment combined with subsequent PC 61 BM monolayer deposition, effects on device photovoltaic performance were evaluated respect to single modifications. Under optimized conditions, for...
Here, we evaluate three different noble metal co-catalysts (Pd, Pt, and Au) that are present as single atoms (SAs) on the classic benchmark photocatalyst, TiO2. To trap surface, introduced controlled surface vacancies (Ti3+-Ov) anatase TiO2 nanosheets by a thermal reduction treatment. After anchoring identical loadings of Pd, Au, measure photocatalytic H2 generation rate compare it to nanoparticle nanosheets. While nanoparticles yield well-established hydrogen evolution reaction activity...
Abstract Pt single atoms (SAs) on TiO 2 have been identified as effective co‐catalysts in solar photocatalytic H production. In this study, SAs is deposited crystal anatase nanosheets (NSs) with minor (101) and major (001) facets expose them to various thermal treatments air, Ar, Ar‐H environments. It found that through annealing Pt‐species can be accumulated exclusively the facets, i.e., they concentrated selectively facet where electron exit occurs. This optimally establishes a high...
Titanium dioxide (TiO2 ) and, in particular, its anatase polymorph, is widely studied for photocatalytic H2 production. In the present work, we examine importance of reactive facets crystallites on evolution from aqueous methanol solutions. For this, synthesized TiO2 nanocrystals with a large amount either {001} facets, that is, nanosheets, or {101} octahedral nanocubes, and examined their then repeated this procedure samples where Pt co-catalyst all facets. Octahedral nanocubes abundant...
Single crystal anatase TiO2 nanosheets (TiO2-NSs) are grown hydrothermally on fluorine-doped tin oxide (FTO). By systematically changing the hydrothermal conditions such as reaction time, initial concentration of Ti precursor, F and HCl an additive, a wide variety TiO2-NSs, with different morphologies faceting have been synthesized. For facet ratios (anatase S001/S001+101), photoelectrochemical response is characterized compared. We find that for photoanodes in neutral electrolytes,...
Herein we demonstrate that anatase TiO 2 nanosheets (NS) can be grown on a Ta O 5 substrate. A back contact exhibit 170-fold increase in photocatalytic H production rate than obtained by NSs normally FTO
Two-dimensional (2D) metal dichalcogenides, such as SnS2, have emerged a potential material for photoelectrochemical applications due to their suitable band alignment water splitting, high charge carrier mobility, and significant optical absorption in the blue-green spectral range. In present work, vertically aligned SnS2 nanoflakes (NFs) were grown on quartz glass/fluorine-doped tin oxide (FTO) using sulfidation method H2S furnace at 450 °C various times. The effects of FTO thickness...
Abstract TiO 2 has been the benchmark semiconductor for production of photocatalytic H from aqueous media (with and without sacrificial agent). On surfaces, evolution reaction in environments is kinetically severely hampered. To overcome this limitation reach reasonable generation rates, a well-elucidated approach use noble metal co-catalysts. In contrast to costly approaches, it recently reported that titania reduction treatments can lead noble-metal-free generation. So-called “grey” due Ti...