A5086486745- Catalytic Processes in Materials Science
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- CO2 Reduction Techniques and Catalysts
- Magnetic and transport properties of perovskites and related materials
- Catalysts for Methane Reforming
- Catalysis and Oxidation Reactions
- Electrocatalysts for Energy Conversion
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Graphene research and applications
- Electrochemical Analysis and Applications
- Advancements in Battery Materials
- Catalysis and Hydrodesulfurization Studies
- Nanomaterials for catalytic reactions
- Boron and Carbon Nanomaterials Research
Universität Innsbruck
2020-2024
Graphitic deposits anti-segregate into Ni0 nanoparticles to provide restored CH4 adsorption sites and near-surface/dissolved C atoms, which migrate the /ZrO2 interface induce local Zrx Cy formation. The resulting oxygen-deficient carbidic phase boundary assist in kinetically enhanced CO2 activation toward CO(g). This carbide mechanism allows for spillover of carbon ZrO2 support, represents an alternative catalyst regeneration pathway with respect reverse oxygen on Ni-CeZrx Oy catalysts. It...
Adjusting the defect level during synthesis of A- and B-site deficient lanthanum iron manganite (LFM) perovskites shows that non-stoichiometry can beneficially influence catalytic reactivity to N2 in reduction NO by CO on noble metal-free LFM-based perovskites. Optimal steering La deficiency associated redox chemistry reduce near-surface regions operation at low temperatures is key factor. Surface enrichment reducible B site cations a proper design structural defects resulting from optimum...
Using a combination of insitu bulk and surface characterization techniques, we provide atomic-scale insight into the complex dynamics LaNiO3 perovskite material during heating in vacuo. Driven by outstanding activity methane dry reforming reaction (DRM), attributable to decomposition DRM operation Ni//La2O3 composite, reveal Ni exsolution both on local global scale electron microscopy, X-ray diffraction photoelectron spectroscopy. To reduce complexity disentangle thermal from self-activation...
A series of ultra-clean, unsupported Cu-doped and Pd-doped Ni model catalysts was investigated to develop the fundamental concept metal doping impact on carbon tolerance catalytic activity in dry reforming methane (DRM). Wet etching with concentrated HNO3 a subsequent single sputter–anneal cycle resulted full removal an already existing oxidic passivation layer segregated and/or ambient-deposited surface bulk impurities yield ultra-clean substrates. Carbon solubility, support effects,...
Abstract A profound understanding of the solid/liquid interface is central in electrochemistry and electrocatalysis, as interfacial properties ultimately determine electro‐reactivity a system. Although numerous electrochemical methods exist to characterize this under operating conditions, tools for in‐situ observation surface chemistry, that is, chemical composition oxidation state, are still scarce, currently exclusively available at synchrotron facilities. Here, we demonstrate ability...
Following the need for an innovative catalyst and material design in catalysis, we provide a comparative approach using pure Pd-doped LaCu x Mn1-x O3 (x = 0.3 0.5) perovskite catalysts to elucidate beneficial role of Cu/perovskite promoting effect Cu y Pd /perovskite interfaces developing situ under model NO + CO reaction conditions. The observed bifunctional synergism terms activity N2 selectivity is essentially attributed oxygen-deficient interface, which provides efficient activation...
A versatile multifunctional laboratory-based near ambient pressure x-ray photoelectron spectroscopy (XPS) instrument is presented. The entire device highly customized regarding geometry, exchangeable manipulators and sample stages for liquid- solid-state electrochemistry, cryochemistry, heterogeneous catalysis. It therefore delivers novel unique access to a variety of experimental approaches toward broad choice functional materials their specific surface processes. high-temperature...
To identify the synergistic action of differently prepared Ni-ZrO2 phase boundaries in methane dry reforming, we compared an “inverse” near-surface intermetallic NiZr catalyst precursor with respective bulk-intermetallic NixZry material and a supported catalyst. In all three cases, stable high reforming activity enhanced anticoking properties can be assigned to presence extended boundaries, which result from situ activation Ni-Zr model systems under DRM conditions. All catalysts operate...
Solid oxide cell technologies play a pivotal role in the realm of renewable energy storage, guiding us through journey toward decarbonization. Understanding how electrocatalytic materials behave under high‐temperature conditions is an absolute necessity to push these forward. Operando spectroscopic investigations, such as near‐ambient pressure X‐ray photoelectron spectroscopy (NAP–XPS), offer insights into chemical nature active working electrodes, including dynamic response redox states and...
Adsorption, desorption and fragmentation of borazine on Pt(110) are studied by temperature-programmed desorption, ultraviolet photoemission spectroscopy, workfunction measurements density functional theory.
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding role elemental carbon as key intermediate within reaction pathway is eminent interest. The present synchrotron-based situ near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) study shows that alloying Ni/yttria-stabilized-zirconia (YSZ) Cu can be used to control electrochemical accumulation interfacial carbon, optimize its reactivity...
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding role elemental carbon as key intermediate within reaction pathway is eminent interest. The present synchrotron-based situ near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) study shows that alloying Ni/yttria-stabilized-zirconia (YSZ) Cu can be used to control electrochemical accumulation interfacial carbon, optimize its reactivity...
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding role elemental carbon as key intermediate within reaction pathway is eminent interest. The present synchrotron-based situ near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) study shows that alloying Ni/yttria-stabilized-zirconia (YSZ) Cu can be used to control electrochemical accumulation interfacial carbon, optimize its reactivity...
We describe the development and characterization of direct current magnetron sputtered titanium dioxide thin films from ceramic targets mixed with metallic particles. The aim this article is to assess their suitability for application as buffer layer in copper indium gallium diselenide (CIGSe) based solar cells. absorber material produced a semi-industrial, roll-to-roll hybrid sputter co-evaporation process. A potential strategy modify electro-optical properties TiO2 by controlling...
For the direct reduction of CO2 and H2O in solid oxide electrolysis cells (SOECs) with cermet electrodes toward methane, a fundamental understanding role elemental carbon as key intermediate within reaction pathway is eminent interest. The present synchrotron-based situ near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) study shows that alloying Ni/yttria-stabilized-zirconia (YSZ) Cu can be used to control electrochemical accumulation interfacial optimize its reactivity CO2. In...
Abstract Graphitische Ablagerungen lösen sich in Ni 0 ‐Nanopartikeln auf, um rezyklierte CH 4 ‐Adsorptionsstellen und oberflächennahe/gelöste C‐Atome bereitzustellen, die zur /ZrO 2 ‐Grenzfläche wandern eine lokale Zr x C y ‐Bildung induzieren. Die daraus resultierenden sauerstoffarmen karbidischen Phasengrenzflächen unterstützen Kinetik der CO ‐Aktivierung zu CO(g). Dieser Grenzflächen‐Karbid‐Mechanismus ermöglicht einen verstärkten Übertritt von Kohlenstoff auf den ZrO ‐Träger stellt...