Calley Eads
YOU?
Author Swipe
View article: Catalysis in Frequency Space: Resolving Hidden Oscillating Minority Phases and Their Catalytic Properties
Catalysis in Frequency Space: Resolving Hidden Oscillating Minority Phases and Their Catalytic Properties Open
In situ catalysis studies typically correlate catalytic function and majority surface structures, but neglect that difficult-to-detect minority structures might govern catalysis. Here we use an oscillating CO:O2 gas composition to drive st…
View article: Persistence of Ce<sup>3+</sup> species on the surface of ceria during redox cycling: a modulated chemical excitation investigation
Persistence of Ce<sup>3+</sup> species on the surface of ceria during redox cycling: a modulated chemical excitation investigation Open
Through a combination of modulated chemical excitation and RPES analyses, we elucidated the dynamic behavior of oxygen species on the ceria surface, revealing how changes in CO/O 2 gas composition influence the electronic structure of CeO …
View article: Time-resolved ambient pressure x-ray photoelectron spectroscopy: Advancing the operando study of ALD chemistry
Time-resolved ambient pressure x-ray photoelectron spectroscopy: Advancing the operando study of ALD chemistry Open
Today, atomic layer deposition (ALD) has become a firm corner stone of thin film deposition technology. The microelectronics industry, an early adopter of ALD, imposes stringent requirements on ALD to produce films with highly defined phys…
View article: Resolving Active and Spectator Species during the Oxidation of Carbon Monoxide over Pt(111) on the Microsecond Timescale
Resolving Active and Spectator Species during the Oxidation of Carbon Monoxide over Pt(111) on the Microsecond Timescale Open
Catalytic studies traditionally rely on steady-state conditions resulting in time-averaged datasets that do not differentiate between active and spectator species. This limitation can cause misinterpretations of catalytic function, as the …
View article: Comparing phase sensitive detection and Fourier analysis of modulation excitation spectroscopy data exemplified by Ambient Pressure X-ray Photoelectron Spectroscopy
Comparing phase sensitive detection and Fourier analysis of modulation excitation spectroscopy data exemplified by Ambient Pressure X-ray Photoelectron Spectroscopy Open
Dynamic processes in catalysis are gaining increased attention and could very well be one of the next frontiers in surface science. One way to study such processes is to induce chemical changes on the surface for example by periodically ad…
View article: Catalysis in frequency space: Resolving hidden surface structure and activity oscillations
Catalysis in frequency space: Resolving hidden surface structure and activity oscillations Open
In situ catalysis studies typically correlate catalytic function and majority surface structures, but neglect that difficult-to-detect minority structures might govern catalysis. Here we use an oscillating CO:O2 gas composition to drive st…
View article: Investigating Surface Reactivity of a Ni-Rich Cathode Material toward CO<sub>2</sub>, H<sub>2</sub>O, and O<sub>2</sub> Using Ambient Pressure X-ray Photoelectron Spectroscopy
Investigating Surface Reactivity of a Ni-Rich Cathode Material toward CO<sub>2</sub>, H<sub>2</sub>O, and O<sub>2</sub> Using Ambient Pressure X-ray Photoelectron Spectroscopy Open
Layered Ni-rich transition metal oxide materials are considered the most promising cathodes for use in commercial Li-ion batteries. Due to their instability in air, an impurity layer forms during storage under ambient conditions, and this …
View article: Photocatalytic setup for <i>in situ</i> and <i>operando</i> ambient-pressure X-ray photoelectron spectroscopy at MAX IV Laboratory
Photocatalytic setup for <i>in situ</i> and <i>operando</i> ambient-pressure X-ray photoelectron spectroscopy at MAX IV Laboratory Open
The Ambient-Pressure X-ray Photoelectron Spectroscopy (APXPS) endstation at the SPECIES beamline at MAX IV Laboratory has been improved. The latest upgrades help in performing photo-assisted experiments under operando conditions in the mba…
View article: Active site identification and CO oxidation in UiO-66-XX thin films
Active site identification and CO oxidation in UiO-66-XX thin films Open
Metal-organic frameworks (MOFs) offer an intrinsically porous and chemically tunable platform for gas adsorption, separation, and catalysis. We investigate thin film derivatives of the well-studied Zr–O based MOF powders to understand thei…
View article: Quantum-Well Bound States in Graphene Heterostructure Interfaces
Quantum-Well Bound States in Graphene Heterostructure Interfaces Open
We present experimental evidence of electronic and optical interlayer resonances in graphene van der Waals heterostructure interfaces. Using the spectroscopic mode of a low-energy electron microscope (LEEM), we characterized these interlay…
View article: Enhanced Catalysis under 2D Silica: A CO Oxidation Study
Enhanced Catalysis under 2D Silica: A CO Oxidation Study Open
Interfacially confined microenvironments have recently gained attention in catalysis, as they can be used to modulate reaction chemistry. The emergence of a 2D nanospace at the interface between a 2D material and its support can promote va…
View article: Enhanced Catalysis under 2D Silica: A CO Oxidation Study
Enhanced Catalysis under 2D Silica: A CO Oxidation Study Open
Interfacially confined microenvironments have recently gained attention in catalysis, as they can be used to modulate reaction chemistry. The emergence of a 2D nanospace at the interface between a 2D material and its support can promote va…
View article: Confinement Effects on Furfuryl Alcohol Reactions over Porous Bilayer Silica-Modified Pd(111)
Confinement Effects on Furfuryl Alcohol Reactions over Porous Bilayer Silica-Modified Pd(111) Open
In recent years, hexagonally ordered silica bilayer films have been successfully grown and characterized on metal substrates. To investigate how confinement effects from the silica films can influence catalytic reactions, we studied the re…
View article: Ultrafast Carrier Dynamics in Two-Dimensional Electron Gas-like K-Doped MoS<sub>2</sub>
Ultrafast Carrier Dynamics in Two-Dimensional Electron Gas-like K-Doped MoS<sub>2</sub> Open
Electronic interactions associated with atomic adsorbates on transition metal dichalcogenides such as MoS2 can induce massive electronic reconstruction that results in the formation of a new type of heavily doped transition metal dichalcog…
View article: Multi-modal surface analysis of porous films under <i>operando</i> conditions
Multi-modal surface analysis of porous films under <i>operando</i> conditions Open
Practical catalysts with a porous framework, such as zeolites, host catalytic reactions at active sites engrained in the pores and channels of the scaffold. The mechanism of interaction at these active sites, defining catalyst performance,…
View article: Correlation of Auger electron spectroscopy and microsynchrotron radiation x-ray photoelectron spectroscopy investigations of Ba-Sc-O desorption on W(100)
Correlation of Auger electron spectroscopy and microsynchrotron radiation x-ray photoelectron spectroscopy investigations of Ba-Sc-O desorption on W(100) Open
Thin films of barium and scandium metal were deposited onto W(100) from metal evaporation sources in ultrahigh vacuum. The Ba-Sc-W(100) surface was then exposed to oxygen and heated in stages to several temperatures up to 1400 °C to examin…
View article: A mathematical model of solid-state dewetting of barium thin films on <i>W</i>(112)
A mathematical model of solid-state dewetting of barium thin films on <i>W</i>(112) Open
Solid state dewetting occurs when a thin solid film is heated. The temperature of dewetting depends on the thickness of the film; dewetting can be observed in the range of 1∕3 to 1∕2 of the bulk melting temperature. While remaining solid, …
View article: Eigenstate-specific temperatures in two-level paramagnetic spin lattices
Eigenstate-specific temperatures in two-level paramagnetic spin lattices Open
Increasing interest in the thermodynamics of small and/or isolated systems, in combination with recent observations of negative temperatures of atoms in ultracold optical lattices, has stimulated the need for estimating the conventional, c…