A5056185071- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Electrochemical Analysis and Applications
- TiO2 Photocatalysis and Solar Cells
- Hybrid Renewable Energy Systems
- Electronic and Structural Properties of Oxides
- Catalysis for Biomass Conversion
- Nanocluster Synthesis and Applications
- Transition Metal Oxide Nanomaterials
- Metalloenzymes and iron-sulfur proteins
- Polyoxometalates: Synthesis and Applications
- Advanced battery technologies research
- ZnO doping and properties
University of Zurich
2021-2025
Sb 2 Se 3 photocathode performance improves by tuning substrate temperature during metal deposition. Thinner nanorods result in reduced charge recombination, enhancing photocurrent restricting transport the hk 0 direction.
Crystal orientation-dependent etching, charge-carrier trapping behaviour, and performance of single-crystal photocathodes are enabled by ammonia solution etching thermally-oxidised Cu 2 O.
The use of conductive and corrosion-resistant protective layers represents a key strategy for improving the durability light absorber materials in photoelectrochemical water splitting. For high performance photoanodes such as Si, GaAs, GaP, amorphous TiO
Small cation size along with removal of trace iron from the electrolyte solution enables practical use earth-abundant nickel oxide electrodes for selective oxidation organic molecules over water in aqueous solutions.
Cu2S is a promising solar energy conversion material due to its suitable optical properties, high elemental earth abundance, and nontoxicity. In addition the challenge of multiple stable secondary phases, short minority carrier diffusion length poses an obstacle practical application. This work addresses issue by synthesizing nanostructured thin films, which enables increased charge collection. A simple solution-processing method involving preparation CuCl CuCl2 molecular inks in thiol-amine...
Antimony selenide (Sb2Se3) is an auspicious material for solar energy conversion that has seen rapid improvement over the past ten years, but photovoltage deficit remains a challenge. Here, simple and low-temperature treatments of p-n heterojunction interface Sb2Se3/TiO2-based photocathodes photoelectrochemical water splitting were explored to address this The FTO/Ti/Au/Sb2Se3 (substrate configuration) stack was treated with (NH4)2S as etching solution, followed by CuCl2 treatment prior...
Antimony selenide (Sb2Se3) has recently been intensively investigated and achieved significant advancement in photoelectrochemical (PEC) water splitting. In this work, a facile one-step hydrothermal method for the preparation of Sn-doped Sb2Se3 photocathodes with improved PEC performance was investigated. We present an in-depth study enhancement using capacitance–voltage (CV), drive-level capacitance profiling (DLCP), electrochemical impedance spectroscopy (EIS) techniques. The incorporation...
Abundantly available biomass-based platform chemicals, including 5-hydroxymethylfurfural (HMF), are essential stepping stones in steering the chemical industry away from fossil fuels. The efficient catalytic oxidation of HMF to its diacid derivative, 2,5-furandicarboxylic acid (FDCA), is a promising research area with potential applications polymer industry. Currently, most encouraging approaches based on solid-state catalysts and often conducted basic aqueous media, conditions where...
Cu
Abstract In the past decade, antimony selenide (Sb 2 Se 3 ) has made significant progress as a solar energy conversion material. However, photovoltage deficit continues to pose challenge and is major hurdle that must be overcome reach its maximum efficiency. this study, various post‐synthetic treatments are employed, of which combination solution phase silver nitrate treatment sulfurization shown most effective approach mitigate in Sb ‐based device. A enhancement observed after treatments,...
The use of conductive and corrosion-resistant protective layers represents a key strategy for improving the durability light absorber materials in photoelectrochemical water splitting. For high performance photoanodes such as Si, GaAs, GaP, amorphous TiO2 (a-TiO2) overlayers, deposited by atomic layer deposition, are holes via defect band TiO2. However, when coated on simply prepared, low-cost metal oxides, no charge transfer is observed through a-TiO2. Here, we report hybrid...
Antimony selenide (Sb2Se3) has recently been intensively investigated and achieved significant advancement in photoelectrochemical (PEC) water splitting. In this work, a facile one-step hydrothermal method for the preparation of Sn-doped Sb2Se3 photocathodes with improved PEC performance was investigated. We present an in-depth study enhancement using capacitance-voltage (CV), drive level capacitance profiling (DLCP), electrochemical impedance spectroscopy (EIS) techniques. The incorporation...
Antimony selenide (Sb2Se3) has recently been intensively investigated and achieved significant advancement in photoelectrochemical (PEC) water splitting. In this work, a facile one-step hydrothermal method for the preparation of Sn-doped Sb2Se3 photocathodes with improved PEC performance was investigated. We present an in-depth study enhancement using capacitance-voltage (CV), drive level capacitance profiling (DLCP), electrochemical impedance spectroscopy (EIS) techniques. The incorporation...
Molybdenum sulfide serves as an effective non-precious metal catalyst for hydrogen evolution, primarily active at edge sites with unsaturated molybdenum or terminal disulphides. To improve the activity low loading density, two clusters, [Mo3S4]4+ and [Mo3S13]2–, were investigated. The Mo3Sx molecular catalysts heterogenized on Sb2Se3 a simple soaking treatment, resulting in thin layer of only few nanometers that gave up to 20 mA cm–2 under one sun illumination. Both [Mo3S13]2– exhibit...
We report a facile method to enhance the photoelectrochemical (PEC) performance of Sb2Se3 photocathodes by controlling growth bilayer consisting vertically oriented nanorods on compact layer. thin films with controllable nanorod diameters were achieved manipulating substrate temperature during metallic Sb film deposition. The lower temperature-derived photocathode, larger diameter (202 ± 48 nm), demonstrated photocurrent density -15.2 mA cm−2 at 0 VRHE and an onset potential 0.21 VRHE. In...
Molybdenum sulfide serves as an effective nonprecious metal catalyst for hydrogen evolution, primarily active at edge sites with unsaturated molybdenum or terminal disulfides. To improve the activity a low loading density, two clusters, [Mo3S4]4+ and [Mo3S13]2–, were investigated. The Mo3Sx molecular catalysts heterogenized on Sb2Se3 simple soaking treatment, resulting in thin layer of only few nanometers that gave up to 20 mA cm–2 under one sun illumination. Both [Mo3S13]2– exhibit...
Despite widespread use of electrochemical impedance spectroscopy (EIS) to study multi-layer photoelectrochemical (PEC) cells, the appropriate equivalent circuits describing these devices under hydrogen evolution conditions are not commonly investigated. 1 This creates ambiguity with respect pathways charge recombination and ionic movement within layers device during operation, therefore limiting rational development future PEC devices. In this study, amorphous TiO 2 (a-TiO ) protected...