A5107978496- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Catalysis and Oxidation Reactions
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
- Ionic liquids properties and applications
- Advanced Chemical Sensor Technologies
- Advanced battery technologies research
- Nanopore and Nanochannel Transport Studies
- Microfluidic and Bio-sensing Technologies
- Mass Spectrometry Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Nanowire Synthesis and Applications
- Advanced Sensor Technologies Research
- Microfluidic and Capillary Electrophoresis Applications
- Electron and X-Ray Spectroscopy Techniques
- Molecular Junctions and Nanostructures
- Chemical Safety and Risk Management
- Electrohydrodynamics and Fluid Dynamics
Aalborg University
2025
Technical University of Denmark
2015-2018
Oxide-derived copper (OD-Cu) electrodes exhibit unprecedented CO reduction performance towards liquid fuels, producing ethanol and acetate with >50% Faradaic efficiency at -0.3 V (vs. RHE). By using static headspace-gas chromatography for phase analysis, we identify acetaldehyde as a minor product key intermediate in the electroreduction of to on OD-Cu electrodes. Acetaldehyde is produced ≈5% -0.33 We show that forms low steady-state concentrations, free difficult detect alkaline solutions...
A wafer-scale process for fabricating monolithically suspended nano-perforated membranes (NPMs) with integrated support structures into silicon is developed. Existing fabrication methods are suitable many desired geometries, but face challenges related to mechanical robustness and complexity. We demonstrate a that utilizes the cyclic deposit, remove, etch, multi-step (DREM) directional etching of high-aspect-ratio (HAR) 300 nm in diameter nano-pores 700 pitch. Subsequently, buried cavity...
High coverage of the catalyst surface generated by <italic>in situ</italic> degradation propene steers reaction towards allylic oxidation.
Abstract Oxide‐derived copper (OD‐Cu) electrodes exhibit unprecedented CO reduction performance towards liquid fuels, producing ethanol and acetate with >50 % Faradaic efficiency at −0.3 V (vs. RHE). By using static headspace‐gas chromatography for phase analysis, we identify acetaldehyde as a minor product key intermediate in the electroreduction of to on OD‐Cu electrodes. Acetaldehyde is produced ≈5 −0.33 We show that forms low steady‐state concentrations, free difficult detect alkaline...
This paper presents a novel apparatus for extracting volatile species from liquids using "sniffer-chip." By ultrafast transfer of the through perforated and hydrophobic membrane into an inert carrier gas stream, sniffer-chip is able to transport directly mass spectrometer narrow capillary without use differential pumping. method inherits features electrochemical spectrometry (DEMS) inlet (MIMS), but brings best both worlds, i.e., fast time-response DEMS system high sensitivity MIMS system....
On important electrocatalysts including ruthenium and copper, increasing the potential pushes adsorbed hydrogen off as H<sub>2</sub>, an unexpected uphill desorption.
We present a first-of-its-kind vacuum inlet system enabling operation of analysis instruments, like mass spectrometers, directly in liquid or gaseous environments. Our overcomes the limitations differential pumping while maintaining an ultra-fast time-response and delivering up to 1000 times higher sensitivity than conventional technologies [1]. are thus able perform quantitative chemical reaction products with unprecedented on millisecond time-scales. Across many scientific industrial...
With the greater implementation of intermittent renewable energy sources, such as wind and solar power, efficient storage technologies need to be developed. In addition, alternative carriers fossil fuels found in order decrease emission CO 2 from transport sector. A highly promising means doing so would hydrogenate via electrolysis into fuels, methanol or ethanol; such, it constitute a carbon-neutral carrier. [1] Carbon dioxide could captured point fuel power plants by burning biomass. make...
We have recently developed a unique vacuum inlet system, which couples mass spectrometer to an electrochemical experiment like conventional DEMS/OLEMS system – but with unprecedented combination of quantitative and ultrasensitive product detection sub-second time resolution. [1] Using this one-of-a-kind tool, we experimentally map out the behavior Cu-based CO reduction. In particular, study transient overproduction methane. find that very pronounced, methane (compared ethylene) is result...
Across many scientific and industrial fields, it is a challenge to analyze chemical reaction products with high sensitivity fast time-response. This especially true in systems related electrochemical energy conversion storage, such as batteries fuel cells, where accurate monitoring of transient phenomena often reveals key insights. Here, we present unique analysis instrument using microchip-based inlet system couple mass spectrometer directly any liquid test environment, aqueous or...
Journal Article Electrochemical Mass Spectroscopy for In-situ Liquid Phase Electron Microscopy Get access Hongyu Sun, Sun DENSsolutions B.V., Informaticalaan 12, Delft, The Netherlands Corresponding author: hongyu.sun@denssolutions.com (H. Sun), dbt@spectroinlets.com (D. Trimarco), hugo.perez@denssolutions.com Pérez Garza) Search other works by this author on: Oxford Academic Google Scholar Johannes Novak Hartmann, Hartmann Spectro Inlets ApS, Ole Maaløes Vej 3, København, Denmark Ronald...