A5032404729- Electrocatalysts for Energy Conversion
- Copper-based nanomaterials and applications
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Nanomaterials for catalytic reactions
- Quantum Dots Synthesis And Properties
- Machine Learning in Materials Science
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Layered Double Hydroxides Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Perovskite Materials and Applications
- Nanowire Synthesis and Applications
- MXene and MAX Phase Materials
- Inorganic Chemistry and Materials
- Electrochemical Analysis and Applications
- Semiconductor materials and devices
University of Zurich
2017-2020
Swiss Federal Laboratories for Materials Science and Technology
2013-2016
A solution deposition approach for high-performance aluminum-doped zinc oxide (AZO) thin films (visible transparency > 90% and sheet resistance down to 25 Ω/sq) with process temperatures not exceeding 85 °C is presented. This allows the non-vacuum of AZO on temperature sensitive substrates such as polymer flexible transparent electronics, or inorganic organic film photovoltaics. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials...
We report a facile colloidal synthesis of gallium (Ga) nanoparticles with the mean size tunable in range 12–46 nm and excellent distribution as small 7–8%. When stored under ambient conditions, Ga remain stable for months due to formation native passivating Ga-oxide layer (2–3 nm). The mechanism is elucidated using nuclear magnetic resonance spectroscopy molecular dynamics simulations. Size-dependent crystallization melting temperature 98–298 K are studied X-ray powder diffraction, specific...
High performance kesterite (CZTSe) based solar cell devices usually employ an absorber/buffer heterostructure using toxic CdS deposited by chemical bath deposition (CBD) as buffer layer.This is due to the favourable spike like conduction band alignment of and CZTSe absorber.ZnS(O,OH) layers provide a promising nontoxic alternative.Here, variation thiourea concentration in CBD ZnS(O,OH) its influence on device performances pure selenide cells presented.Furthermore, layer conditions light...
Transition metal carbodiimides MNCN (M = Co, Ni, Co0.9Ni0.1, Mn and Cu), were studied by simultaneous operando Raman X-ray absorption spectroscopy (XAS) with focus on surface oxide detection during electrocatalytic water oxidation. As a proof of concept, easily modifiable screen-printed electrodes used in this unified synchrotron setup for trade-off between convenience electrochemical anodization spectroscopic data acquisition. Monitoring chemical structural transformations at the electrode...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTTime-Resolved Powder X-ray Diffraction of the Solvothermal Crystallization Cobalt Gallate Spinel Photocatalyst Reveals Transient Layered Double HydroxidesDaniel S. Cook†, Yue Wu‡, Karla Lienau§, René Moré§, Reza J. Kashtiban∥, Oxana V. Magdysyuk⊥, Greta R. Patzke§, and Richard I. Walton*†View Author Information† Department Chemistry, University Warwick, Coventry CV4 7AL, United Kingdom‡ Materials Science & Metallurgy, Cambridge, 27 Charles...
Abstract The hydrothermal growth of cobalt oxide spinel (Co 3 O 4 ) nanocrystals from acetate precursors was monitored with in situ powder X‐ray diffraction (PXRD) combination ex electron microscopy and vibrational spectroscopy. Kinetic data PXRD monitoring were analyzed using Sharp–Hancock Gualtieri approaches, which both clearly indicate a change the mechanism for reaction temperatures above 185 °C. This mechanistic transition goes hand morphology changes that notably influence...
The development of efficient, stable, and economic water oxidation catalysts (WOCs) is a forefront topic sustainable energy research. We newly present comprehensive three-step approach to systematically investigate challenging relationships among preparative history, properties, performance in heterogeneous WOCs. To this end, we studied (1) the influence method on material properties (2) their correlation with as (3) function catalytic test method. Spinel-type Co3O4 was selected clear-cut...
Water oxidation is the bottleneck reaction for overall water splitting as a direct and promising strategy toward clean fuels. However, development of robust affordable heterogeneous catalysts remains challenging, especially with respect to wide parameter space synthesis resulting material properties. Oxide performance in particular has been shown depend on both synthetic routes applied catalytic test methods. We here focus spinel-type Co3O4 representative case an in-depth study influence...
Photo- and electrochemical water splitting are direct routes to convert inexhaustible solar resources into storable chemical fuels. The development of noble metal-free catalysts is essential for forthcoming technological applications. To this end, we have launched systematic investigations cobalt-based molecular oxoclusters nanostructured oxides over the past years. [1, 2] In parallel, explored in ex situ monitoring methods electrocatalysts, focusing on transition metal carbodiimides as...