Vanadium Oxide Anion Clusters - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Vanadium Oxide Anion Clusters write by . This book was released on 2004. Vanadium Oxide Anion Clusters available in PDF, EPUB and Kindle. Early transition metal oxide clusters have been a focus of study for several years. The production of vanadium oxide cluster anions in a pulsed helium flow reactor provides a relatively precise way of introducing defect sites and controlling the oxidation state of the vanadium atoms. The composition of the clusters can be changed from the V2O5 stoichiometry, where the vanadium atom is in a +5 oxidation state, to more reduced stoichiometries yielding a mixture of oxidation states containing atoms in the +2 oxidation state. The subsequent addition of reactant gases such as H2O and SO2 yields very intense adsorption reactions as well as a demonstration of the robustness of particular defect free clusters. For example, the cluster has been identified as a defect free cluster where all vanadium atoms are in the +5 oxidation state and all oxygen atoms are predicted to be in the 2- state. The cluster has been shown to not adsorb SO2- while clusters in a reduced oxidation state, such as and readily adsorb one or more SO2 molecules. The adsorption process has been shown to be size dependent, with the smallest monovanadium oxide anions being the most reactive.
Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters
Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters write by Sandra Feyel. This book was released on 2008. Gaseous Vanadium, Vanadium Oxide and Hydroxide Clusters available in PDF, EPUB and Kindle. The present work explores the reactivities of gaseous vanadium, vanadium-oxide, and oxovanadium-hydroxide clusters toward methanol and small hydrocarbons. Various means of mass-spectrometric techniques, isotopic labeling studies, infrared photodissociation spectroscopy, and complementary DFT-calculations are employed for this purpose. Additionally, the hydrogen-atom abstraction process from methane by polynuclear metal oxides is discussed. This work contributes to a better understanding of the metal-oxide cluster's catalytic activity on a molecular scale.
Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons
Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons write by Yin Wei. This book was released on 2005. Computational Studies of the Structure of Vanadium Oxide Clusters and Their Reactions with Halocarbons available in PDF, EPUB and Kindle.
Atomic Clusters
Atomic Clusters - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Atomic Clusters write by . This book was released on 2007-05-24. Atomic Clusters available in PDF, EPUB and Kindle. Atomic Clusters: From Gas Phase to Deposited brings together a series of chapters, prepared by acknowledged experts in their fields. Both fundamental and practical aspects are addressed of the physics and chemistry of a novel state of matter, namely clusters of small numbers of atoms of nanometre dimensions. This is a field of nanoscience that existed before the word was invented, but has particularly achieved major advances in the recent years. * Contributions from leading experts in solid surfaces research* Cluster science is concerned with the properties of materials on the nano-metre scale* Brings together work on both free (gas-phase) clusters and those deposited on surfaces
The Chemistry of Vanadium, Niobium and Tantalum
The Chemistry of Vanadium, Niobium and Tantalum - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Chemistry of Vanadium, Niobium and Tantalum write by R. J. H. Clark. This book was released on 2013-10-08. The Chemistry of Vanadium, Niobium and Tantalum available in PDF, EPUB and Kindle. The Chemistry of Vanadium, Niobium and Tantalum gives a comprehensive discussion on the discovery, origin, and metallurgical aspects of vanadium, niobium, and tantalum. A section is also focused on the nuclear properties, as well as the physical and chemical properties of each compound. The history and distribution of vanadium, niobium, and tantalum are explored, along with the purification and extraction procedures of the said elements. The book also explores the derivative compounds such as the alloys, hydride, halides, and oxides. Another section of the book is focused on the physical and chemical modifications of the elements that generate such by-products as the cyanides, hydroxides, and sulfides. Different complexes of the elements such as halogeno- and oxyhalogeno-complexes are discussed in detail. The organometallic chemistry of niobium, tantalum, and vanadium are also identified. The book will be a useful tool for chemical engineers, chemical scientists, and students in the field of chemistry.
