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Showing 1 to 10 of 10 for “"Niobium oxide"”.
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Exploring Optoelectronic Properties of Twisted and Intercalated Niobium Oxide Dihalides
… of mechanically and chemically manipulated niobium oxydichloride (NbOCl₂) and niobium oxydiiodide (NbOI₂) ultrathin structures that have the potential to integrate into flexible optical systems.
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Anodic alcohol fuel cell reactions at platinum active sites on doped metal oxide supports
… associated with a carbon-based catalyst, metal oxide supports are an area of interest as they display high stability in the harsh conditions associated with fuel cell operations. In this work, the employment of various doped metal oxide supports; silicon & molybdenum doped titanium oxide (TOMS), …
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High performance materials for artificial muscles and energy storage devices
… The current technologies, such as tantalum/niobium oxide micro-supercapacitors are evolving around enhancing the energy and power density by increasing the specific capacitance and operating voltage. Yet, increasing the specific capacitance is still a major challenge. In this thesis, aside …
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Atomic and Electronic Structure of Complex Metal Oxides during Electrochemical Reaction with Lithium
… storage without nanostructuring is discovered in niobium oxide and the mechanism is explained in the context of the structure–property relationships of Nb2O5. Three polymorphs, T-Nb2O5, B-Nb2O5, and H-Nb2O5, take bronze-like, rutile-like, and crystallographic shear structures, respectively. The …
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Use of sol-gels in the application of ceramic oxide thin films
<p>Metal oxide sol-gels were produced through a controlled hydrolysis-condensation reaction of the metal alkoxide in alcohol using nitric acid as a catalyst. In obtaining sols of niobia, tantala, and titania, increasing either the water content or the system concentration increased the rate of …
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Aerosol Synthesis and Electrochemical Analysis of Niobium Mixed-Metal Oxides for the Ethanol Oxidation Reaction in Acid and Alkaline Electrolyte
… with carefully designed metals and metal oxides as co-catalysis or support structures that favorably alter the electronic structure of Pt slightly through a strong metal support interaction, while also acting as an oxygen source near adsorbates to facilitate the total oxidation pathway. …
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Rh-Based Catalysis Chemistry of Aqueous-Phase Nitrogen Treatment Reactions
… A new Rh supported on a semi-crystalline niobium oxide support was developed to activate aqueous ammonium at room temperature and atmospheric pressure, converting into gas-phase nitrogen species (N2, NO, N2O) and trace amounts of NO3- using only O2. Raman spectroscopy correlated the …
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Memristive devices based on NbOx
L'abstract è presente nell'allegato / the abstract is in the attachment
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INNOVATIVE SYSTEMS FOR THE MITIGATION OF RISKS: CATALYSTS AND SMART MATERIALS FOR DETECTION AND DECONTAMINATION OF HAZARDOUS CHEMICAL, BIOLOGICAL AND EXPLOSIVE SUBSTANCES
… response to the COVID-19 pandemic, hydrogen peroxide has emerged as a sustainable alternative for inactivating SARS-CoV-2 in the liquid phase. A diluted 3% w/w H2O2 solution acidified to pH 2.5 by adding citric acid inactivated SARS-CoV-2 virus by more than 4 orders of magnitude in 5 min. …
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The thermodynamics, kinetics and modelling of fast-charging lithium-ion batteries featuring crystallographic shear niobium metal oxide anodes
… 1 V reduction potential of the electrolyte. Niobium-based metal oxides have the optimal electronegativity to strike this balance, with a nominal potential around 1.6 V, charging rates >5C and a cycle-life projected over 10,000 cycles. Chapter 1 shows that the exact potential can be tuned …