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Improving access and use of climate projections for ecological research through the use of a new Python tool
(2024)EcographyOver the past decade, the use of future climate projections from the coupled model intercomparison project (CMIP) has become central in biodiversity science. Pre-packaged datasets containing future projections of the widely used bioclimatic variables, for different times and socio-economic pathways, have contributed immensely to the study of climate change implications for biodiversity. However, these datasets lack the flexibility to ...Journal Article -
The luminescent semiconductor Pb₇I₆(CN₂)₄
(2024)Dalton TransactionsThe development of new compounds in the domain of metal dinitridocarbonates is most efficiently performed via solid-state metathesis or simply by addition reactions. Our discovery of Pb₇I₆(CN₂)₄ is the result of a solid-state reaction of PbCN₂ with PbI₂ at 420 degrees C. Its crystal structure was solved and refined from X-ray diffraction data based on a single crystal with the space group P6₃/mmc. The crystal structure is based on a network ...Journal Article -
Control of Ge island coalescence for the formation of nanowires on silicon
(2024)Nanoscale HorizonsGermanium nanowires could be the building blocks of hole-spin qubit quantum computers. Selective area epitaxy enables the direct integration of Ge nanowires on a silicon chip while controlling the device design, density, and scalability. For this to become a reality, it is essential to understand and control the initial stages of the epitaxy process. In this work, we highlight the importance of surface treatment in the reactor prior to ...Journal Article -
Relaxation enhancement by microwave irradiation may limit dynamic nuclear polarization
(2024)Physical Chemistry Chemical PhysicsDynamic nuclear polarization enables the hyperpolarization of nuclear spins beyond the thermal-equilibrium Boltzmann distribution. However, it is often unclear why the experimentally measured hyperpolarization is below the theoretically achievable maximum polarization. We report a (near-) resonant relaxation enhancement by microwave (MW) irradiation, leading to a significant increase in the nuclear polarization decay compared to measurements ...Journal Article -
Plasmon resonance dynamics and enhancement effects in tris(2,2′-bipyridine)ruthenium(II) gold nanosphere oligomers
(2024)NanoscaleRuthenium-based metal complexes are one of the most widely studied dyes because of their rich photochemistry and light-harvesting properties. Significant attention has been paid to the energy and charge transfer dynamics of these dyes on semiconductor substrates. However, studies on photophysical and photochemical properties of these dyes in plasmonic environments are rare. In this study, we report a plasmon-mediated resonance energy ...Journal Article -
Design of polybenzimidazolium membranes for use in vanadium redox flow batteries
(2024)Journal of Materials Chemistry AIn recent years, polybenzimidazole (PBI) membranes have been proposed for vanadium redox flow batteries (VRFBs) as an alternative to perfluoroalkylsulfonic acid membranes such as Nafion (TM). Despite their excellent capacity retention, PBI membranes tend to suffer from a low ionic conductivity. The formation of a polybenzimidazolium through an N-alkylation of the benzimidazole core is shown to improve the ionic conductivity of the membrane, ...Journal Article -
Synthesis and performance of binder-free porous carbon electrodes in electrochemical capacitors
(2024)Journal of Materials Chemistry APorous binder-free carbon electrodes were obtained by impregnating cellulose filter papers with phenolic resin through soft-salt template synthesis and thermal pyrolysis. These self-standing electrodes were used directly in a supercapacitor device. To understand the impacts of filter paper (FP) thickness on carbon filter paper (CFP) morphology, porosity, and surface functionalities, five different materials were examined. The CFP electrode ...Journal Article -
Delving into Fe-content effects on surface reconstruction of Ba0.50Sr0.50Co1−xFexO3−δ for the oxygen evolution reaction
(2024)Journal of Materials Chemistry ASurface reconstruction of cobalt-based oxides is recognized as a key to efficiently electrocatalyze the oxygen evolution reaction (OER) in alkaline environment. Identifying material features that promote surface reconstruction is crucial to rationally improve OER electrocatalysts. Here, the Fe-content effects on the surface reconstruction of flame-spray synthesized Ba0.50Sr0.50Co1-xFexO3-delta (BSCo1-xFex) is systematically investigated ...Journal Article -
The formation, reactivity and transformation pathways of formaldehyde in the methanol-to-hydrocarbon conversion
(2024)Catalysis Science & TechnologyCoke-induced catalyst deactivation is one of the major challenges in commercial methanol-to-hydrocarbon (MTH) conversion processes. It is suspected to be critically dependent on formaldehyde-mediated reactions. Using photoelectron photoion coincidence and operando diffuse reflectance UV-vis spectroscopy techniques, we reveal details of formaldehyde formation and reactivity over industrially relevant ZSM-5 catalysts, and its role in the ...Journal Article -
Reactions of hypobromous acid with dimethyl selenide, dimethyl diselenide and other organic selenium compounds: Kinetics and product formation
(2024)Environmental Science: Water Research & TechnologySelenium (Se) is an essential micronutrient for many living organisms particularly due to its unique redox properties. We recently found that the sulfur (S) analog for dimethyl selenide (DMSe), i.e. dimethyl sulfide (DMS), reacts fast with the marine oxidant hypobromous acid (HOBr) which likely serves as a sink of marine DMS. Here we investigated the reactivity of HOBr with dimethyl selenide and dimethyl diselenide (DMDSe), which are the ...Journal Article