A5016240919- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Copper-based nanomaterials and applications
- Advancements in Battery Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Fuel Cells and Related Materials
- Electrochemical sensors and biosensors
- Advanced Battery Materials and Technologies
- Quantum Dots Synthesis And Properties
- Advanced Nanomaterials in Catalysis
- Photonic Crystals and Applications
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Nanocluster Synthesis and Applications
- Conducting polymers and applications
- Plasmonic and Surface Plasmon Research
- Metal-Organic Frameworks: Synthesis and Applications
- CO2 Reduction Techniques and Catalysts
- Innovative Microfluidic and Catalytic Techniques Innovation
Uppsala University
2019-2025
Stockholm University
2018-2025
AlbaNova
2018-2025
Polish Academy of Sciences
2024
Institute of Physical Chemistry
2024
Massachusetts Institute of Technology
2023
Technische Universität Berlin
2015-2020
Freie Universität Berlin
2017-2019
Mixed Ni–Fe oxides are attractive anode catalysts for efficient water splitting in solar fuels reactors. Because of conflicting past reports, the catalytically active metal redox state catalyst has remained under debate. Here, we report an operando quantitative deconvolution charge injected into nanostructured oxyhydroxide OER or reaction product molecules. To achieve this, explore oxygen evolution dynamics and individual faradaic efficiencies using differential electrochemical mass...
Ni-Fe oxyhydroxides are the most active known electrocatalysts for oxygen evolution reaction (OER) in alkaline electrolytes and therefore of great scientific technological importance context electrochemical energy conversion. Here we uncover, investigate, discuss previously unaddressed effects conductive supports electrolyte pH on Ni-Fe(OOH) catalyst redox behavior catalytic OER activity, combining situ UV-vis spectro-electrochemistry, operando mass spectrometry (DEMS), cryo X-ray absorption...
Efficient oxygen evolution reaction (OER) electrocatalysts are pivotal for sustainable fuel production, where the Ni-Fe oxyhydroxide (OOH) is among most active catalysts alkaline OER. Electrolyte alkali metal cations have been shown to modify activity and intermediates, however, exact mechanism at question due unexplained deviations from cation size trend. Our X-ray absorption spectroelectrochemical results show that bigger shift Ni2+/(3+δ)+ redox peak OER lower potentials (however, with...
Abstract In-situ X-ray absorption spectroscopy (XAS) at the oxygen K-edge was used to investigate role of during evolution reaction (OER) in an electrodeposited Ni-Fe(O x H y ) electrocatalyst alkaline pH. We show rise a pre-peak feature 529 eV O spectra, correlated appearance shoulder Ni L 3 -edge and formation oxidized 3+/4+ -O. Then, for first time, we track spectral changes dynamic fashion both soft hard regimes cyclic voltammetry (in situ CV-XAS) obtain fine-tuned resolution...
We present an unusual, yet facile, strategy towards formation of physically mixed Ni-Fe(OxHy) oxygen evolution electrocatalysts. use in situ X-ray absorption and UV-vis spectroscopy, high-resolution imaging to demonstrate that physical contact between two inferior Ni(OH)2 Fe(OOH) catalysts self-assemble into atomically intermixed Ni-Fe with unexpectedly high activity.
Abstract Plasmonic materials convert light into hot carriers and heat to mediate catalytic transformation. The participation of (photocatalysis) remains a subject vigorous debate, often argued on the basis that have ultrashort lifetime incompatible with drive photochemical processes. This study utilises plasmon electrons directly in photoelectrocatalytic reduction CO 2 via Ppasmonic nanohybrid. Through deliberate construction plasmonic nanohybrid system comprising NiO/Au/Re I ( phen-NH )(CO)...
Nickel–vanadium layered double hydroxide has recently been considered as a highly active, low-cost electrocatalyst and benchmark non-noble metal-based for water oxidation. The material showed current density of 27 mA/cm2 at an overpotential 350 mV, which is comparable to the best-performing nickel–iron-layered hydroxides oxidation in alkaline media. enhanced conductivity facile electron transfer were suggested among important factors high activity nickel–vanadium hydroxide. In present study,...
Metal–organic frameworks (MOFs) are periodic organic–inorganic materials that have garnered considerable attention for electrocatalytic applications due to their wide tunability. Metal-hydroxide organic (MHOFs), a subset of MOFs combine layered metal hydroxides with ligands various π–π stacking energy, shown promising catalytic functions, such as the oxygen evolution reaction (OER). The long-term electrochemical stability these OER is unfortunately not well understood, which critical design...
Graphite electrodes offer remarkable electrochemical properties, emerging as a viable alternative to glassy carbon (GCE) and other carbon-based for fundamental electrochemistry research. We report the fabrication characterization of high-purity graphite disk (GDEs), made from cost-effective materials solvent-free methodology employing readily available laboratory equipment. Analysis their physical properties via SEM, EDX XPS reveals no metallic interferences notably high porosity,...
Iron-doped nickel oxyhydroxides, Nix(Fe1–x)OyHz, are among the most promising oxygen evolution reaction (OER) electrocatalysts in alkaline environments. Although iron (Fe) significantly enhances catalytic activity, there is still no clear consensus on whether Fe directly participates or merely acts as a promoter. To elucidate Fe's role, we performed operando X-ray spectroscopy studies supported by DFT Nix(Fe1–x)OyHz electrocatalysts. We probed reversible changes structure and electronic...
The zinc/copper hexacyanoferrate (Zn/CuHCF) cell has gained attention as an aqueous rechargeable zinc-ion battery (ZIB) owing to its open framework, excellent rate capability, and high safety. However, both the Zn anode CuHCF cathode show unavoidable signs of aging during cycling, though underlying mechanisms have remained somewhat ambiguous. Here, we present in-depth study by employing various X-ray spectroscopic techniques. This allows us distinguish between structure-related effects...
<italic>Operando</italic> Pd X-ray absorption spectroscopy elucidates how the surface oxygen species steer selectivity in electrochemical oxidation of propene.
Increased attention has been directed toward generating nonequilibrium hot carriers resulting from the decay of collective electronic oscillations on metal known as surface plasmons. Despite numerous experimental endeavors, demonstrating carrier-mediated photocatalysis without a heating contribution proven challenging, particularly for single electron transfer reactions where thermal is generally detrimental. An innovative engineering solution proposed to enable with plasmonics. It consists...
Automated microfluid reactor with machine learning capabilities for discovery, optimization and standardization of translational scalable nanomaterial synthesis.
Abstract All studies on oxygen‐evolution reaction by Mn oxides in the presence of cerium(IV) ammonium nitrate (CAN) have been so far carried out synthesizing first step. And then, followed investigation oxidants for (OER). This paper presents a case study new and promising strategy situ catalyst synthesis adding II to either CAN or KMnO 4 /CAN solution, resulting formation Mn‐based catalysts OER. The were characterized scanning electron microscopy, energy‐dispersive spectroscopy,...
Light trapping with a Fabry–Pérot plasmonic cavity produced solution methods.
Liquid metal coatings are applied to the surfaces of metallic zinc anodes in rechargeable aqueous Zn-ion batteries promote dendrite-free plating and stripping, enhance electron transport, improve overall electrochemical cycling performance. In this study, we utilized a Ga–Sn–Zn eutectic alloy as surface coating on Zn anode mildly acidic 1 M ZnSO4 electrolyte, both symmetric full cells incorporating copper hexacyanoferrate cathode. The exhibited promising performance during initial stages...
Abstract Prussian blue and its analogs are promising materials for numerous applications. Interest in this class of arises from their broad pore distribution, redox properties, high biocompatibility, low‐cost components, straightforward manufacturability, adaptability through analog development. A key challenge is the synthesis well‐defined, small‐dimensioned using machine learning approaches. This study presents a strategy to address limitation via learning‐driven microfluidic synthesis....
Abstract Fundamental understanding of anisotropic growth in oxide nanocrystals is crucial to establish new synthesis strategies and tailor the nanoscale electronic, magnetic, optical, electrocatalytic properties these particles. While several investigations metal alloy nanoparticles have been reported, mechanistic studies on ternary materials are still missing. This work constitutes first study evolution manganese–cobalt by monitoring elemental distribution morphology during particle via...
Abstract Graphite electrodes offer remarkable electrochemical properties, emerging as a viable alternative to glassy carbon (GCE) and other carbon-based for fundamental electrochemistry research. We report the fabrication characterization of high-purity graphite disk (GDEs), made from cost-effective materials solvent-free methodology employing readily available laboratory equipment. Analysis their physical properties via SEM, EDX XPS reveals no metallic interferences notably high porosity,...
So far, all studies on oxygen-evolution reactions using Mn oxides in the presence of cerium(IV) ammonium nitrate (CAN) have been carried out by synthesizing first step, followed investigation oxidants for reaction (OER). This work presents a case study new and promising strategy situ catalyst synthesis adding MnII to CAN solution, resulting formation Mn-based catalysts OER. More information can be found Full Paper M. Görlin, Najafpour, et al. page 1330.