A5084770879- Catalytic Processes in Materials Science
- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Ionic liquids properties and applications
- Advancements in Battery Materials
- Electrochemical Analysis and Applications
- Magnetic and transport properties of perovskites and related materials
- Advanced battery technologies research
- Catalysis and Oxidation Reactions
- Advanced Battery Materials and Technologies
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- nanoparticles nucleation surface interactions
- Porphyrin and Phthalocyanine Chemistry
- Molecular Sensors and Ion Detection
- Conducting polymers and applications
- Photochromic and Fluorescence Chemistry
- MXene and MAX Phase Materials
- Nanomaterials for catalytic reactions
- Photochemistry and Electron Transfer Studies
- Ferrocene Chemistry and Applications
- Fluorine in Organic Chemistry
- Zeolite Catalysis and Synthesis
Universität Innsbruck
2020-2024
The electrochemical reduction of CO2 is an important electrolysis reaction that enables the conversion a waste gas to fuels or value-added chemicals. To make this viable, profound understanding central intermediate steps, such as CO electroreduction, required. On Cu, (CORR) intimately linked hydrogen evolution (HER) proceeds via water in alkaline neutral electrolytes. Here, we demonstrate interaction more specifically kinetics on differently smooth Cu(100) and Cu(111) surfaces during CORR...
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...
Transition metal carbides, especially Mo2C, are praised to be efficient electrocatalysts reduce CO2 valuable hydrocarbons. However, on Mo2C in an aqueous electrolyte, exclusively the competing hydrogen evolution reaction takes place, and this discrepancy theory was traced back formation of a thin oxide layer at electrode surface. Here, we study reduction activity non-aqueous electrolyte avoid such passivation determine products pathway. We find tendency carbon monoxide. This process is...
Compound materials, such as transition-metal (TM) carbides, are anticipated to be effective electrocatalysts for the carbon dioxide reduction reaction (CO2RR) useful chemicals. This expectation is nurtured by density functional theory (DFT) predictions of a break key adsorption energy scaling relations that limit CO2RR at parent TMs. Here, we evaluate these prospects hexagonal Mo2C in aqueous electrolytes multimethod experiment and approach. We find surface oxide formation completely...
The hydrogen evolution reaction (HER) has been crucial for the development of fundamental knowledge on electrocatalysis and electrochemistry, in general. In alkaline media, many key questions concerning pH-dependent structure–activity relations underlying activity descriptors remain unclear. While presence Ni(OH)2 deposited Pt(111) shown to highly improve rate HER through electrode's bifunctionality, no studies exist how low coverages influence electrocatalytic behavior Cu surfaces, which is...
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...
The hydrogen evolution reaction (HER) is a crucial electrochemical process for the proposed economy since it has potential to provide pure fuel cells. Nowadays, electroproduction considerably expensive, so promoting development of new non-noble catalysts cathode alkaline electrolyzers appears as suitable way reduce costs this technology. In sense, series tungsten-based carbide materials have been synthesized by urea-glass route candidates improve HER in media. Moreover, two different...
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...
Abstract Small organic acids, such as formic or acetic acid, which are well‐known products of the electrochemical CO 2 reduction reaction, often not further reduceable to their respective alcohols. Alcohols well‐desired chemicals and useful fuels, since they can be easily purified provide a high energy density. Here, we present combined electrochemical, differential mass spectrometry (DEMS), nuclear magnetic resonance spectroscopy (NMR) study, providing insight in electro‐reduction acid on...
We describe a new type of operando Fourier transform infrared (FTIR)–mass spectrometry setup for surface-chemical and reactivity characterization heterogeneous catalysts. On the basis sophisticated all-quartz FTIR reactor cell, capable operating between room temperature 1000 °C in reactive gas atmospheres, offers unique opportunity to simultaneously collect accordingly correlate adsorption data active catalyst state phase with complementary obtained via mass situ. The full set catalytic...
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...
Abstract Electroactive organic semiconducting pigments represent a group of very promising electrode materials for the next generation energy conversion and storage technologies. However, most suffer from high solubility in electrolytes poor electrical conductivity, which have severely impeded their practical applications. Among different strategies to improve electrochemical performance, using conductive carbon substrates form composite electrodes is one used methods solve these problems....
Excellent, self‐improving sodiation rate capabilities in combination with high capacity retention upon galvanostatic charge/discharge cycling are found for oxygen‐deficient, carburized, and self‐organized titanium dioxide (TiO 2− x ) nanotubes (NTs). The mechanism is attributed to the formation of an acicular surface film as active storage material sodium (Na) peroxide (Na 2 O being main component. Whether proposed chemistry unique TiO NTs or serves a common scheme Na‐ion at metal oxide...
Abstract NaTi 2 (PO 4 ) 3 (NTP) and Na 0.44 MnO (NMO), their derivatives, have emerged as the most promising materials for aqueous Na‐ion batteries. For both, NTP NMO, avoiding evolution of hydrogen oxygen is found to be mandatory in order mitigate material dissolution. Intriguingly, however, no direct determination reactions (HER OER) has yet been carried out. Using differential electrochemical mass spectrometry (DEMS) we directly identify onset potentials HER OER. Surprisingly, potential...
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...
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...