Graphite-conjugated Catalysts - 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 Graphite-conjugated Catalysts write by Seokjoon Oh. This book was released on 2019. Graphite-conjugated Catalysts available in PDF, EPUB and Kindle. This interconversion occurs via complex multistep, multielectron reactions, which can be carried out by either metallic heterogeneous or molecular homogeneous electrocatalysts. Metallic heterogeneous catalysts have a continuum of electronic states that distribute the redox burden of multielectron reactions, allowing for efficient catalysis. However, heterogeneous catalysts display a variety of active sites and local electronic structures, and are difficult to fine-tune at a molecular level. On the other hand, homogeneous catalysts allow a great degree of synthetic control over the catalytic active site. Moreover, the relative ease in spectroscopic characterization allows a mechanistic understanding of molecular catalysis at a level that is unattainable for heterogeneous catalysis. To bridge the advantages of both types of catalysts, we have developed a surface functionalization strategy for conjugating molecularly well-defined active sites to graphitic carbon surfaces. First, I will discuss the preparation and characterization of two new types of conjugating N-heterocyclic linkages to graphitic carbon surfaces. This work presents a general method for characterizing modified carbon surfaces with molecular-level structural detail. Then, I will present the electrocatalytic carbon dioxide reduction activity of a graphite-conjugated rhenium catalyst, and compare its catalytic behavior to that of a molecular analog. Electrochemical and spectroscopic data show that graphite-conjugated catalysts do not behave identically to their molecular analogs, but rather show properties similar to that of metallic heterogeneous catalysts, providing a unique bridge between the worlds of heterogeneous and homogeneous catalysis. Finally, in the appendix, I will present a chapter on the stability of graphite-conjugated linkages under electrochemical polarization, followed by a chapter on catalyzing the reduction of molecular pyridinium species using a graphite-conjugated rhodium catalyst.
Spectroscopic and Reactivity Studies on Graphite-conjugated Salen Complexes
Spectroscopic and Reactivity Studies on Graphite-conjugated Salen Complexes - 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 Spectroscopic and Reactivity Studies on Graphite-conjugated Salen Complexes write by Jeffrey Neal Rosenberg. This book was released on 2020. Spectroscopic and Reactivity Studies on Graphite-conjugated Salen Complexes available in PDF, EPUB and Kindle. Metal oxo intermediates are evoked and observed in a wide range of natural and man-made catalytic system. These varied systems demonstrate divergent reactivity modes dependent on perturbations to the electronic structure and reaction conditions. It is necessary to uncover electronic structure characterization of reactive metal oxo intermediates to provide an improved means of understanding how perturbations to the electronic structure will direct towards these competing pathways. Herein, we have developed a platform for the study of site isolated metal oxo intermediates with a unique electronic structure derived from a conjugated linkage between graphitic carbon edge sites and a chelated metal center. This linkage results in a high degree of electronic coupling between the isolated metal site and the band structure of the graphitic carbon material, referred to as graphite-conjugated catalysts (GCCs). Specifically, we have synthesized a pyrazine-linked conjugated salen-type ligand platform which has been metallated with Mn2+ and used to functionalize graphitic carbon electrodes and powder. XPS surface characterization on the N and Mn chemical environments and relative abundance indicate the desired surface condensation to form a pyrazinic linkage has proceeded as desired. Electrochemical characterization of functionalized electrodes by cyclic voltammogram show three distinct features. Two reversible redox features consistent with proton-coupled electron transfers at the pyrizinic linkages and a third feature, putatively assigned to the metal site. Future work on this project will involve 1) the expansion of the scope of metallation to additional first row transition metals, 2) thermal reactivity studies, 3) in-situ XAS studies, and 4) electrochemical oxygen-reduction reactivity studies.
Industrial Carbon and Graphite Materials
Industrial Carbon and Graphite Materials - 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 Industrial Carbon and Graphite Materials write by Hubert Jaeger. This book was released on 2021-03-05. Industrial Carbon and Graphite Materials available in PDF, EPUB and Kindle. An excellent overview of industrial carbon and graphite materials, especially their manufacture, use and applications in industry. Following a short introduction, the main part of this reference deals with industrial forms, their raw materials, properties and manifold applications. Featuring chapters on carbon and graphite materials in energy application, and as catalysts. It covers all important classes of carbon and graphite, from polygranular materials to fullerenes, and from activated carbon to carbon blacks and nanoforms of carbon. Indispensable for chemists and engineers working in such fields as steel, aluminum, electrochemistry, nanotechnology, catalyst, carbon fibres and lightweight composites.
Transition metal-graphite catalysts for production of light hydrocarbons from synthesis gas
Transition metal-graphite catalysts for production of light hydrocarbons from synthesis gas - 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 Transition metal-graphite catalysts for production of light hydrocarbons from synthesis gas write by Texas A & M University. Department of Chemistry. This book was released on 1976. Transition metal-graphite catalysts for production of light hydrocarbons from synthesis gas available in PDF, EPUB and Kindle.
Carbon Materials for Catalysis
Carbon Materials for Catalysis - 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 Carbon Materials for Catalysis write by Philippe Serp. This book was released on 2009-02-04. Carbon Materials for Catalysis available in PDF, EPUB and Kindle. This is the first comprehensive book covering all aspects of the use of carbonaceous materials in heterogeneous catalysis. It covers the preparation and characterization of carbon supports and carbon-supported catalysts; carbon surface chemistry in catalysis; the description of catalytic, photo-catalytic, or electro-catalytic reactions, including the development of new carbon materials such as carbon xerogels, aerogels, or carbon nanotubes; and new carbon-based materials in catalytic or adsorption processes. This is a premier reference for carbon, inorganic, and physical chemists, materials scientists and engineers, chemical engineers, and others.
