Thomas Götsch
YOU?
Author Swipe
View article: Stabilizing Frustrated Phase Transitions in Selective Oxidation Reactions
Stabilizing Frustrated Phase Transitions in Selective Oxidation Reactions Open
Frustrated phase transitions represent the ideal working state of a heterogeneous catalyst. These states exist within a narrow parameter window, making them difficult to stabilize. Here, it is shown for the selective oxidation of 2‐propano…
View article: Local solid-state processes adjust the selectivity in catalytic oxidation reactions on cobalt oxides
Local solid-state processes adjust the selectivity in catalytic oxidation reactions on cobalt oxides Open
Transition metal oxides are excellent catalysts for selective oxidation reactions, which are a prominent source of industrially relevant chemicals. However, these reactions suffer from multiple competing reaction pathways, limiting the sel…
View article: Metastable Crystalline Cobalt Iron Oxide Nano‐Flakes with Antiferromagnetic/Ferrimagnetic Composition Mosaicity
Metastable Crystalline Cobalt Iron Oxide Nano‐Flakes with Antiferromagnetic/Ferrimagnetic Composition Mosaicity Open
By thermal decomposition of a crystalline hydroxycarbonate precursor with a Co:Fe ratio of 2:1, crystals with alternating ferrimagnetic and antiferromagnetic nano‐domains were synthesized using a facile synthetic approach that combined bot…
View article: Dynamic Surface Restructuring and Carbonate-Mediated Pathways in Perovskite-Catalyzed CO Oxidation Revealed by Operando Spectroscopy
Dynamic Surface Restructuring and Carbonate-Mediated Pathways in Perovskite-Catalyzed CO Oxidation Revealed by Operando Spectroscopy Open
In this work, we studied two perovskite-based catalysts, namely LaFeO₃ (LFO) and LaFe₀.₇₅Co₀.₂₅O₃ (LFCO), to reveal the reaction mechanism and disentangle the complex surface phenomena taking place during a seemingly simple CO oxidation re…
View article: Elucidating the Hydrogen Selectivity of Pt/TiO<sub><i>x</i></sub>/C as a Fuel-Cell Catalyst by Operando Near-Ambient-Pressure XPS
Elucidating the Hydrogen Selectivity of Pt/TiO<sub><i>x</i></sub>/C as a Fuel-Cell Catalyst by Operando Near-Ambient-Pressure XPS Open
The long-term stability of proton exchange membrane fuel cells (PEMFCs) faces significant challenges, particularly during start-up and shut-down events, which lead to degradation of the cathode catalyst through the oxidation of its carbon …
View article: Subnanometer Tracking of the Oxidation State on Co<sub>3</sub>O<sub>4</sub> Nanoparticles by Identical Location Imaging and Spectroscopy
Subnanometer Tracking of the Oxidation State on Co<sub>3</sub>O<sub>4</sub> Nanoparticles by Identical Location Imaging and Spectroscopy Open
Understanding a catalytic reaction requires tools that elucidate the structure of the catalyst surface and subsurface, ideally at atomic resolution and under reaction conditions. Operando electron microscopy meets this requirement in some …
View article: Boon and Bane of Local Solid State Chemistry on the Performance of LSM‐Based Solid Oxide Electrolysis Cells
Boon and Bane of Local Solid State Chemistry on the Performance of LSM‐Based Solid Oxide Electrolysis Cells Open
High‐temperature solid oxide cells are highly efficient energy converters. However, their lifetime is limited by rapid deactivation. Little is known about the local, atomic scale transformation that drive this degradation. Here, reaction‐i…
View article: Atomic Insights into the Competitive Edge of Nanosheets Splitting Water
Atomic Insights into the Competitive Edge of Nanosheets Splitting Water Open
The oxygen evolution reaction (OER) provides the protons for many electrocatalytic power-to-X processes, such as the production of green hydrogen from water or methanol from CO2. Iridium oxohydroxides (IOHs) are outstanding catalysts for t…
View article: Atomic insights into the competitive edge of nanosheets splitting water
Atomic insights into the competitive edge of nanosheets splitting water Open
The oxygen evolution reaction (OER) provides the protons for many electrocatalytic power-to-X processes, such as the production of green hydrogen from water or methanol from CO2. Iridium oxo-hydroxides (IOHs) are outstanding catalysts for …
View article: Structural Analysis and Redox Properties of Oxygen-“Breathing” A(Mn<sub>1–<i>x</i></sub>Cu<sub><i>x</i></sub>)O<sub>3</sub> (A = La, Pr) Perovskites
Structural Analysis and Redox Properties of Oxygen-“Breathing” A(Mn<sub>1–<i>x</i></sub>Cu<sub><i>x</i></sub>)O<sub>3</sub> (A = La, Pr) Perovskites Open
The redox properties of perovskites play an important role in their use in thermo- and electrocatalytic applications. Here, we report the effects of substituting copper for manganese in A(Mn1–xCux)O3 (A = La, Pr; 0 ≤ x ≤ 0.4) perovskites o…
View article: <i>In Situ</i> Formation of Platinum‐Carbon Catalysts in Propane Dehydrogenation
<i>In Situ</i> Formation of Platinum‐Carbon Catalysts in Propane Dehydrogenation Open
The catalytic production of propylene via propane dehydrogenation (PDH) is a key reaction in the chemical industry. By combining operando transmission electron microscopy with density functional theory analysis, we show that the intercalat…
View article: <i>In Situ</i> Formation of Platinum‐Carbon Catalysts in Propane Dehydrogenation
<i>In Situ</i> Formation of Platinum‐Carbon Catalysts in Propane Dehydrogenation Open
The catalytic production of propylene via propane dehydrogenation (PDH) is a key reaction in the chemical industry. By combining operando transmission electron microscopy with density functional theory analysis, we show that the intercalat…
View article: Metastable nickel–oxygen species modulate rate oscillations during dry reforming of methane
Metastable nickel–oxygen species modulate rate oscillations during dry reforming of methane Open
When a heterogeneous catalyst is active, it forms metastable structures that constantly transform into each other. These structures contribute differently to the catalytic function. Here we show the role of different metastable oxygen spec…
View article: Electrocatalytic Enhancement of CO Methanation at the Metal–Electrolyte Interface Studied Using In Situ X-ray Photoelectron Spectroscopy
Electrocatalytic Enhancement of CO Methanation at the Metal–Electrolyte Interface Studied Using In Situ X-ray Photoelectron Spectroscopy Open
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding of the role of elemental carbon as a key intermediate within the reaction pathway is of em…
View article: Electrocatalytic enhancement of CO methanation at the metal-electrolyte interface studied by in situ X-ray photoelectron spectroscopy
Electrocatalytic enhancement of CO methanation at the metal-electrolyte interface studied by in situ X-ray photoelectron spectroscopy Open
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding of the role of elemental carbon as a key intermediate within the reaction pathway is of em…
View article: Electrocatalytic enhancement of CO methanation at the metal-electrolyte interface studied by in situ X-ray photoelectron spectroscopy
Electrocatalytic enhancement of CO methanation at the metal-electrolyte interface studied by in situ X-ray photoelectron spectroscopy Open
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding of the role of elemental carbon as a key intermediate within the reaction pathway is of em…
View article: Electrocatalytic enhancement of CO methanation at the metal-electrolyte interface studied by in situ X-ray photoelectron spectroscopy
Electrocatalytic enhancement of CO methanation at the metal-electrolyte interface studied by in situ X-ray photoelectron spectroscopy Open
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding of the role of elemental carbon as a key intermediate within the reaction pathway is of em…
View article: In situ genesis of selective adsorption sites by complex catalytic redox dynamics
In situ genesis of selective adsorption sites by complex catalytic redox dynamics Open
Several in situ studies have revealed spatiotemporal dynamics on heterogeneous catalysts surfaces under chemical stimuli1-4, which presumably control the activity, selectivity, and productivity5-11. However, operando validations of suffici…
View article: The pervasive presence of oxygen in ZrC
The pervasive presence of oxygen in ZrC Open
Based on the recent interest in oxy-carbide materials in catalysis, we employ a thin film model concept to highlight that variation of key reaction parameters in the reactive magnetron sputtering of zirconium carbide films (sputtering powe…
View article: Sr Surface Enrichment in Solid Oxide Cells – Approaching the Limits of EDX Analysis by Multivariate Statistical Analysis and Simulations
Sr Surface Enrichment in Solid Oxide Cells – Approaching the Limits of EDX Analysis by Multivariate Statistical Analysis and Simulations Open
In solid oxide cells, Sr segregation has been correlated with degradation. Yet, the atomistic mechanism remains unknown. Here we begin to localize the origin of Sr surface nucleation by combining force field based simulations, energy dispe…
View article: The state of zinc in methanol synthesis over a Zn/ZnO/Cu(211) model catalyst
The state of zinc in methanol synthesis over a Zn/ZnO/Cu(211) model catalyst Open
The active chemical state of zinc (Zn) in a zinc-copper (Zn-Cu) catalyst during carbon dioxide/carbon monoxide (CO 2 /CO) hydrogenation has been debated to be Zn oxide (ZnO) nanoparticles, metallic Zn, or a Zn-Cu surface alloy. We used x-r…
View article: X-ray Absorption Near-Edge Structure (XANES) at the O K-Edge of Bulk Co3O4: Experimental and Theoretical Studies
X-ray Absorption Near-Edge Structure (XANES) at the O K-Edge of Bulk Co3O4: Experimental and Theoretical Studies Open
We combine theoretical and experimental X-ray absorption near-edge spectroscopy (XANES) to probe the local environment around cationic sites of bulk spinel cobalt tetraoxide (Co3O4). Specifically, we analyse the oxygen K-edge spectrum. We …
View article: Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells (Adv. Mater. Interfaces 18/2021)
Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells (Adv. Mater. Interfaces 18/2021) Open
Complexions at the Electrolyte/Electrode Interface In article number 2100967, Thomas Götsch and co-workers reveal that a complexion is formed between the yttria-stabilized zirconia electrolyte and lanthanum strontium manganite air electrod…
View article: Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells
Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells Open
Rapid deactivation presently limits a wide spread use of high‐temperature solid oxide cells (SOCs) as otherwise highly efficient chemical energy converters. With deactivation triggered by the ongoing conversion reactions, an atomic‐scale u…
View article: Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells
Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells Open
Rapid deactivation presently limits a wide spread use of high-temperature solid oxide cells (SOCs) as otherwise highly efficient chemical energy converters. With deactivation triggered by the ongoing conversion reactions, an atomic-scale u…
View article: Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells
Complexions at the Electrolyte/Electrode Interface in Solid Oxide Cells Open
Rapid deactivation presently limits a wide spread use of high-temperature solid oxide cells (SOCs) as otherwise highly efficient chemical energy converters. With deactivation triggered by the ongoing conversion reactions, an atomic-scale u…
View article: True Nature of the Transition-Metal Carbide/Liquid Interface Determines Its Reactivity
True Nature of the Transition-Metal Carbide/Liquid Interface Determines Its Reactivity Open
Compound materials, such as transition-metal (TM) carbides, are anticipated to be effective electrocatalysts for the carbon dioxide reduction reaction (CO2RR) to useful chemicals. This expectation is nurtured by density functional theory (…
View article: Enhancing the Catalytic Activity of Palladium Nanoparticles via Sandwich-Like Confinement by Thin Titanate Nanosheets
Enhancing the Catalytic Activity of Palladium Nanoparticles via Sandwich-Like Confinement by Thin Titanate Nanosheets Open
As atomically thin oxide layers deposited on flat (noble) metal surfaces have been proven to have a significant influence on the electronic structure and thus the catalytic activity of the metal, we sought to mimic this architecture at the…