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Showing 1 to 20 of 50 for “"transition metal oxide"”.
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Geometry, magnetism and electronic structure of transition-metal oxide and carbide clusters
Contains fulltext : 178610.pdf (Publisher’s version ) (Open Access)
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Characterizing the influence of layered transition metal oxide morphology on cathode performance
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Interplay between electronic structure and catalytic activity in transition metal oxide model system
… such as hydrogen fuel cells, rechargeable metal-air batteries, and hydrogen production from water splitting, is limited by the slow kinetics of the oxygen electrochemical reactions. Transition-metal oxides can exhibit high catalytic activity for oxygen electrochemical reactions, which can …
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A FACILE SYNTHESIS OF TRANSITION METAL OXIDE AND CHALCOGENIDES NANOCRYSTALS FOR ELECTROCATALYTIC APPLICA TIONS
Cobalt-manganese oxide spinel nanocrystal are well known for its excellent performance as supercapacitor electrode and electrocatalyst. The high surface to volume ratio of spinel nanoparticles enables high charge storage while the interactions between mixed valence transition metal elements in the …
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Nanoscale heterojunctions of transition metal oxide and silicon for high-efficiency oxygen evolution reaction
… to investigate nanoscale heterojunctions of transition metal oxide and silicon (Si), which are commonly used for photo/photoelectocatalytic and photovoltaic materials, respectively. In particular, the heterojunction of anatase titanium dioxide (TiO₂) and Si is of our best interest. The …
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Mechanism of oxygen reduction reaction on transition metal oxide catalysts for high temperature fuel cells
The solid oxide fuel cell (SOFC) with its high energy conversion efficiency, low emissions, silent operation and its ability to utilize commercial fuels has the potential to create a large impact on the energy landscape. Although SOFCs do not require noble metal catalysts, it has the disadvantage …
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Ab initio screening of lithium diffusion rates in transition metal oxide cathodes for lithium ion batteries
… in lithium ion battery cathodes is derived using transition state theory and common materials properties. The metric relies on net activation barrier for lithium diffusion. Several cathode materials are screened using this approach: [beta]'-LiFePO4, hexagonal LiMnBO3, monoclinic LiMnBO3, Li …
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Electron microscopy study of degradation mechanisms in Ni-rich transition metal oxide cathodes for Li-ion batteries
Li-ion batteries have a pivotal role in the transition towards electric transportation. This drastic societal change depends on high energy, sustainable, and long lifetime batteries. Among the most promising cathode active materials that enable such batteries is the class of Ni-rich layered …
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Nichtwässrige Synthese und Bildungsmechanismus von Übergangsmetalloxid-Nanopartikeln = Nonaqueous synthesis of transition-metal oxide nanoparticles and their formation mechanism
… the nonaqueous synthesis of binary and ternary metal oxide nanoparticles is investigated for a number of technologically important materials. A strong focus was put on studying the reaction mechanisms leading to particle formation upon solvothermal treatment of the precursors, as an …
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Understanding the properties of the interface between graphene and transition metal oxide thin films using first principle approaches
… able to slow the charge recombination. Graphene/transition metal oxides nanocomposite study has become much of a wide interest recently with metal oxides like TiO2, ZnO, SnO2, etc. These metal oxides are used as thin lms in photovoltaic technology to harness energy. The nal composite embodies …
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Transition metal oxide layered materials as catalyst and precatalyst for green energy applications: Oxygen evolution reaction and Fischer-Tropsch synthesis
… Mining and extraction release toxic and heavy metals in the environment. The burning of fossil fuels release greenhouse carbon dioxide, SO2, NOX and volatile organic compounds into the atmosphere. Hence, the development of non-fossil fuel based alternative sources of energy is a logical …
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A study of the growth and structure of chromium and iron oxide films on Pd(001) using X-ray photoelectron diffraction and low energy electron diffraction
… made to grow well-ordered chromium- and iron-oxide films on a Pd(001) surface, and two sample preparation techniques, the multilayer and the sequential growth techniques, were used to grow these transition metal oxide films. The study is a part of a larger project that aims to look into the …
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Synthesis and characterizations of nanostructured MnO2 electrodes for supercapacitors applications
… is more environmental friendly than any other transition metal oxide system. The surface area and pore distribution of MnO2 can be controlled by adjusting the reaction time. The MnO2 synthesised under optimum conditions display high capacitance, and exhibit good cycle profile. This work …
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Influence of the plasma chemistry and energetics on the composition and structure evolution of sputtered oxide thin films
… thin film composition and structure evolution of transition metal oxide thin films deposited by magnetron sputtering in an Ar/O2 atmosphere is investigated as a function of the O2 partial pressure (p(O2)). The previously reported composition of films deposited onto grounded non-intentionally …
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Lithium intercalation reactions with transition metal oxides
An investigation of several lithium transition metal oxide systems has been undertaken with the aim of synthesising an optimised LiM0₂ compound (M = Mn, Co or Co/Ni mixtures) for application as a cathode in rechargeab1e lithium batteries. Attention has been focused on systems which show promise for …
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Understanding the intrinsic electrochemistry of ni-rich layered cathodes
… storage. Li-ion batteries employing layered transition metal oxide cathodes are one of the most technologically important energy storage technologies. However, current Li-ion batteries are unable to access their full theoretical capacity and suffer from performance limiting degradation over …
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High accuracy computational methods for lithium ion battery materials
… the voltage curve and discharge rate for complex transition metal oxide electrodes, has pushed Lithium-ion battery research beyond the framework of common computational methods, compromising the accuracy of these tools. Thus, there is an increasing need to use more accurate computational tools, or …
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Interfacial Magnetism and Exchange Bias in Metal Oxide Thin Films
… thin film structure of cubic and perovskite transition metal oxide magnets, particularly when two different magnetic orderings are competing at such interface. The goal is to understand the various effects of an interfaces that exert on the neighboring materials; to understand the role of the …
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Towards the development of calcium ion batteries
… solvent electrolyte combined with solid-liquid metal slush counter and reference electrodes utilizing inert molybdenum, borosilicate glass, and polytetrafluoroethylene cell components. The counter and reference electrodes consist of saturated calcium amalgam and a calcium mercury intermetallic …
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