A5083167782- CO2 Reduction Techniques and Catalysts
- Advanced Condensed Matter Physics
- Advanced battery technologies research
- Catalysis and Oxidation Reactions
- Physics of Superconductivity and Magnetism
- Magnetic and transport properties of perovskites and related materials
- Ionic liquids properties and applications
- Catalysts for Methane Reforming
- Plasmonic and Surface Plasmon Research
- Electrochemical Analysis and Applications
- Solid-state spectroscopy and crystallography
- Earthquake Detection and Analysis
- Rare-earth and actinide compounds
- Ammonia Synthesis and Nitrogen Reduction
- High-pressure geophysics and materials
- Electrocatalysts for Energy Conversion
- Organic and Molecular Conductors Research
- Advanced Thermoelectric Materials and Devices
- Metamaterials and Metasurfaces Applications
- Gold and Silver Nanoparticles Synthesis and Applications
California Institute of Technology
2021-2024
nLIGHT (United States)
2021-2023
University of Stuttgart
2019-2021
We demonstrate pOH imaging with confocal microscopy to probe the microenvironment of an operating CO 2 reduction gas diffusion electrode. find that micrometer-scale morphology plays important role in defining performance.
The local pH near the surface of a CO2 reduction electrocatalyst strongly impacts catalytic selectivity and activity. Here, confocal fluorescence microscopy was used to map electrolyte copper gas diffusion electrode during with micron spatial resolution in three dimensions. We observed that increased from 6.8 greater than 10 as current density 0 28 mA/cm2 100 mM KHCO3 electrolyte. Variations across indicate areas locally Within deep trenches active layer, increases trench width decreases....
We show that the pore size of gas-diffusion layer used in electrochemical CO 2 reduction affects mass transport. This directly influences local reaction microenvironment, controlling selectivity between and formate on Ag catalysts.
Abstract Coulomb repulsion among conduction electrons in solids hinders their motion and leads to a rise resistivity. A regime of electronic phase separation is expected at the first-order transition between correlated metal paramagnetic Mott insulator, but remains unexplored experimentally as well theoretically nearby T = 0. We approach this issue by assessing complex permittivity via dielectric spectroscopy, which provides vivid mapping deep insight into its microscopic nature. Our...
Arrays of metallic nanoparticles can be used for plasmonic color printing. However, the development dynamic displays capable controllable and reversible switching individual pixels is still in its infancy. Here, an active device that operates at border between visible near-infrared spectral region using inverse copper nanoantennas introduced. This a suitable choice, as easily reversibly oxidized reduced with method cyclic voltammetry. The sample setup allows easy application electrical...
The dimer Mott insulator $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$ can be tuned into a metallic and superconducting state upon applying pressure of 1.5 kbar more. We have performed dielectric spectroscopy measurements (7 kHz to 5 MHz) on single crystals as function temperature (down $T=8$ K) (up $p=4$ kbar). At ambient conditions, relaxor-like behavior develops below 50 K that shifts toward lower temperatures the crystal is pressurized. Interestingly, second peak emerges in $\varepsilon_{1}(T)$...
Increasing the product selectivity and decreasing cost of separation is critical for large scale application electrochemical CO2 reduction (ECO2R). We hypothesize that highly concentrated aqueous electrolytes can tune microenvironment catalyst/electrolyte interface improve selectivity. Compared to a conventional electrolyte concentration 1 M HCOOK, use 7.1 HCOOK increases FE ratio C2H4/CO from 2.2 ± 0.3 18.3 4.8 at -1.08 V vs RHE on Cu gas diffusion electrode. Based analysis AIMD simulation,...