The oxygen evolution reaction drives passivity breakdown for Ni–Cr–Mo alloys

A Larsson, A Grespi, G Abbondanza… - Advanced …, 2023‏ - Wiley Online Library
Corrosion is the main factor limiting the lifetime of metallic materials, and a fundamental
understanding of the governing mechanism and surface processes is difficult to achieve …

Unsupervised analysis of optical imaging data for the discovery of reactivity patterns in metal alloy

R Li, A Makogon, T Galochkina, JF Lemineur… - Small …, 2023‏ - Wiley Online Library
Operando wide‐field optical microscopy imaging yields a wealth of information about the
reactivity of metal interfaces, yet the data are often unstructured and challenging to process …

Imaging Gas-Phase Methyl Radicals over a Ag/SiO2 Catalyst during the Partial Oxidation of Methanol

S Pfaff, E Huang, JH Frank - ACS Catalysis, 2024‏ - ACS Publications
We report the operando imaging of the methyl radical mole fraction above a working
catalyst. Using photofragmentation laser-induced fluorescence (PF-LIF), we imaged methyl …

[HTML][HTML] Ambient pressure operando catalytic characterization by combining PM-IRRAS with planar laser-induced fluorescence and surface optical reflectance …

L Rämisch, S Pfaff, SM Gericke, E Lundgren… - Catalysis Today, 2024‏ - Elsevier
We present a combination of optical operando techniques that allow us to bridge the
pressure gap in heterogeneous catalysis. By combining Polarization Modulated-InfraRed …

Constraining reaction pathways for methanol oxidation through operando interrogation of both the surface and the near-surface gas phase

SM Gurses, N Felvey, LR Filardi, AJ Zhang, J Wood… - Chem Catalysis, 2023‏ - cell.com
We combine near-surface molecular beam mass spectrometry—a probe of the gas phase
within hundreds of micrometers of catalyst surfaces—and surface-sensitive infrared …

A polycrystalline Pd surface studied by two-dimensional surface optical reflectance during CO oxidation: Bridging the materials gap

S Pfaff, A Larsson, D Orlov, L Rämisch… - … applied materials & …, 2023‏ - ACS Publications
Industrial catalysts are complex materials systems operating in harsh environments. The
active parts of the catalysts are nanoparticles that expose different facets with different …

Magnetic field-assisted nanochain formation of intermixed catalytic Co–Pd nanoparticles

C Preger, L Rämisch, J Zetterberg, S Blomberg… - Nanoscale, 2025‏ - pubs.rsc.org
Engineering on the nanoscale often involves optimizing performance by designing and
creating new types of nanostructured materials. Multifunctional nanoparticles can be formed …

[HTML][HTML] Multi modal time-resolved infrared and X-ray spectroscopic operando studies of the CO oxidation and NO reduction reactions on Rh (111)

L Rämisch, R Temperton, SM Gericke, S Pfaff… - Applied Surface …, 2025‏ - Elsevier
We present an operando study where Ambient-Pressure X-ray Photoelectron Spectroscopy
(AP-XPS), Polarization Modulation-InfraRed Reflection Absorption Spectroscopy (PM …

[HTML][HTML] Velocity-selected spatial map ion imaging spectrometer for direct imaging of near-surface catalytic activity

DW Chandler, M Fournier, EJ Smoll… - Applied Physics …, 2023‏ - pubs.aip.org
We propose and demonstrate an approach permitting direct imaging of the spatial
distribution of gas-surface reaction products with< 60 μm lateral spatial resolution using a …

Temperature dependent collisional quenching rates of CH (A) by methanol, acetone, methane, oxygen, and nitrogen

S Pfaff, E Huang, JH Frank - Applied Physics B, 2024‏ - Springer
Laser-induced fluorescence is a widely used technique for measuring the concentrations of
gaseous species in reactive environments. To determine absolute number densities from …