Colloidal Nanoparticles for the Rational Design of (multi)metallic Heterogeneous Catalysts PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Colloidal Nanoparticles for the Rational Design of (multi)metallic Heterogeneous Catalysts PDF full book. Access full book title Colloidal Nanoparticles for the Rational Design of (multi)metallic Heterogeneous Catalysts by Esteban Gaston Gioria. Download full books in PDF and EPUB format.
Author: Esteban Gaston Gioria
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Esteban Gaston Gioria
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Priscila Destro
Publisher: Springer
ISBN: 3030035506
Category : Science
Languages : en
Pages : 106
Get Book Here
Book Description
This book explores the formation of colloidal gold–copper (AuCu) alloy nanoparticles and evaluate their application in heterogeneous catalysis. Metal alloys are extremely versatile materials that have been used since the Antiquity to improve the properties of commonly used metals, therefore the understanding of their properties has fostered the applications in areas such as photonics, sensors, clinical diagnostics, and especially in heterogeneous catalysis, which allows catalyst active sites to be modulated. In this book, readers will appreciate the fundamental aspects involved in the synthesis of AuCu nanoalloys, including real-time information about their atomic organization, electronic properties, as well a deeper understand about the behavior of AuCu supported nanoalloys under real catalytic conditions, providing interesting insights about the effect of the support on the nanoalloy stability. The results presented here open new horizons for using metal alloys in catalysis and also other areas where the metal–support interface may play a crucial role.
Author: John Meurig Thomas
Publisher: World Scientific Publishing Company
ISBN: 1848169299
Category : Science
Languages : en
Pages : 324
Get Book Here
Book Description
For far too long chemists and industrialists have relied on the use of aggressive reagents such as nitric and sulphuric acids, permanganates and dichromates to prepare the massive quantities of both bulk and fine chemicals that are needed for the maintenance of civilised life — materials such as fuels, fabrics, foodstuffs, fertilisers and pharmaceuticals. Such aggressive reagents generate vast quantities of environmentally harmful and often toxic by-products, including the oxides of nitrogen, of metal oxides and carbon dioxide.Now, owing to recent advances made in the synthesis of nanoporous solids, it is feasible to design new solid catalysts that enable benign, mild oxidants to be used, frequently without utilising solvents, to manufacture the products that the chemical, pharmaceutical, agro- and bio-chemical industries require. These new solid agents are designated single-site heterogeneous catalysts (SSHCs). Their principal characteristics are that all the active sites present in the high-area solids are identical in their atomic environment and hence in their energy of interaction with reactants, just as in enzymes.Single-site heterogeneous catalysts now occupy a position of growing importance both academically and in their potential for commercial exploitation. This text, the only one devoted to such catalysts, dwells both on principles of design and on applications, such as the benign synthesis of nylon 6 and vitamin B3. It equips the reader with unifying insights required for future catalytic adventures in the quest for sustainability in the materials used by humankind.Anyone acquainted with the language of molecules, including undergraduates in the physical and biological sciences, as well as graduates in engineering and materials science, should be able to assimilate the principles and examples presented in this book. Inter alia, it describes how clean technology and ‘green’ processes may be carried out in an environmentally responsible manner.
Author: Rafael Luque
Publisher: Royal Society of Chemistry
ISBN: 1788014901
Category : Science
Languages : en
Pages : 370
Get Book Here
Book Description
This book presents an introduction to the preparation and characterisation of nanomaterials and their design for specific catalytic applications.
Author: Chenlu Xie
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
Get Book Here
Book Description
The subject of this dissertation focuses on the design and synthesis of new catalysts with well-defined structures and superior performance to meet the new challenges in heterogenous catalysis. The past decade has witness the development of nanoscience as well as the inorganic catalysts for industrial applications, however there are still fundamental challenges and practical need for catalysis. Specifically, it is desirable to have the ability to selectivity produce complex molecules from simple components. Another great challenge faced by the modern industry is being environmentally friendly, and going for a carbon neutral economy would require using CO2 as feedstock to produce valuable products. The work herein focuses on the design and synthesis of inorganic nanocrystal catalysts that address these challenges by achieving selective and sequential chemical reactions and conversion of CO2 to valuable products. Chapter 1 introduces the development of heterogenous catalysis and the colloidal synthesis of metal nanoparticles catalysts with well-controlled structure. Tremendous efforts have been devoted to understanding the nucleation and growth process in the colloidal synthesis and developing new methods to produce metal nanoparticles with controlled sizes, shapes, composition. These well-defined catalytic system shows promising catalytic performance, which can be modulated by their structure (size, shape, compositions and the metal-oxide interfaces). The chapters hereafter explore the synthesis of new catalysts with controlled structures for catalysis. Chapter 2 presents the design and synthesis of a three dimensional (3D) nanostructured catalysts CeO2-Pt@mSiO2 with dual metal-oxide interfaces to study the tandem hydroformylation reaction in gas phase, where CO and H2 produced by methanol decomposition (catalyzed by CeO2-Pt interface) were reacted with ethylene to selectively yield propyl aldehyde (catalyzed by Pt-SiO2 interface). With the stable core-shell architecture and well-defined metal-oxide interfaces, the origin of the high propyl aldehyde selectivity over ethane, the dominant byproduct in conventional hydroformylation, was revealed by in-depth mechanism study and attributed to the synergybetween the two sequential reactions and the altered elementary reaction steps of the tandem reaction compared to the single-step reaction. The effective production of aldehyde through the tandem hydroformylation was also observed on other light olefin system, such as propylene and 1-butene. Chapter 3 expands the strategy of tandem catalysis into conversion of CO2 with hydrogen to value-added C2-C4 hydrocarbons, which is a major pursuit in clean energy research. Another well-defined 3D catalyst CeO2–Pt@mSiO2–Co was designed and synthesized, and CO2 was converted to C2-C4 hydrocarbons with 60% selectivity on this catalyst via reverse water gas shift reaction and subsequent Fischer–Tropsch process. In addition, the catalysts is stable and shows no obvious deactivation over 40 h. The successful production of C2−C4 hydrocarbons via a tandem process on a rationally designed, structurally well-defined catalyst demonstrates the power of sophisticated structure control in designing nanostructured catalysts for multiple-step chemical conversions. Chapter 4 turns to electrochemistry and apply the precision in catalyst structural design to the development of electrocatalysts for CO2 reduction. Herein, atomic ordering of bimetallic nanoparticles were synthetically tuned, from disordered alloy to ordered intermetallic, and it showed that this atomic level control over nanocrystal catalysts could give significant performance benefits in electrochemical CO2 reduction to CO. Atomic-level structural investigations revealed the atomic gold layers over the intermetallic core to be sufficient for enhanced catalytic behavior, which is further supported by DFT analysis.
Author: Karine Philippot
Publisher: John Wiley & Sons
ISBN: 3527821759
Category : Technology & Engineering
Languages : en
Pages : 384
Get Book Here
Book Description
Nanoparticles in Catalysis Discover an essential overview of recent advances and trends in nanoparticle catalysis Catalysis in the presence of metal nanoparticles is an important and rapidly developing research field at the frontier of homogeneous and heterogeneous catalysis. In Nanoparticles in Catalysis, accomplished chemists and authors Karine Philippot and Alain Roucoux deliver a comprehensive guide to the key aspects of nanoparticle catalysis, ranging from synthesis, activation methodology, characterization, and theoretical modeling, to application in important catalytic reactions, like hydrogen production and biomass conversion. The book offers readers a review of modern and efficient tools for the synthesis of nanoparticles in solution or onto supports. It emphasizes the application of metal nanoparticles in important catalytic reactions and includes chapters on activation methodology and supported nanoclusters. Written by an international team of leading voices in the field, Nanoparticles in Catalysis is an indispensable resource for researchers and professionals in academia and industry alike. Readers will also benefit from the inclusion of: A thorough introduction to New Trends in the Design of Metal Nanoparticles and Derived Nanomaterials for Catalysis An exploration of Dynamic Catalysis and the Interface Between Molecular and Heterogeneous Catalysts A practical discussion of Metal Nanoparticles in Water: A Relevant Toolbox for Green Catalysis Organometallic Metal Nanoparticles for Catalysis A concise treatment of the opportunities and challenges of CO2 Hydrogenation to Oxygenated Chemicals Over Supported Nanoparticle Catalysts Perfect for catalytic, organic, inorganic, and physical chemists, Nanoparticles in Catalysis will also earn a place in the libraries of chemists working with organometallics and materials scientists seeking a one-stop resource with expert knowledge on the synthesis and characterization of nanoparticle catalysis.
Author: Priyabrat Dash
Publisher:
ISBN: 9780494920510
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Philippe Serp
Publisher: John Wiley & Sons
ISBN: 3527656898
Category : Science
Languages : en
Pages : 741
Get Book Here
Book Description
Nanocatalysis has emerged as a field at the interface between homogeneous and heterogeneous catalysis and offers unique solutions to the demanding requirements for catalyst improvement. Heterogeneous catalysis represents one of the oldest commercial applications of nanoscience and nanoparticles of metals, semiconductors, oxides, and other compounds have been widely used for important chemical reactions. The main focus of this fi eld is the development of well-defined catalysts, which may include both metal nanoparticles and a nanomaterial as the support. These nanocatalysts should display the benefits of both homogenous and heterogeneous catalysts, such as high efficiency and selectivity, stability and easy recovery/recycling. The concept of nanocatalysis is outlined in this book and, in particular, it provides a comprehensive overview of the science of colloidal nanoparticles. A broad range of topics, from the fundamentals to applications in catalysis, are covered, without excluding micelles, nanoparticles in ionic liquids, dendrimers, nanotubes, and nanooxides, as well as modeling, and the characterization of nanocatalysts, making it an indispensable reference for both researchers at universities and professionals in industry.
Author: Albert Darling
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Nanomaterials have long stood as excellent platforms for achieving efficient catalytic performance, owing to their intrinsic high surface area to volume ratio. In addition, nanoscaling has demonstrated promise in the stabilization of structural features, such a novel phases or surface defects, which can significantly alter the catalytic properties of their respective materials. In this dissertation, I build on these foundations through the development of new catalytic materials for both the selective hydrogenation of nitroarenes and the hydrogen evolution reaction. With these advances, I leverage nanoscale-stabilized structural features as well as nanostructuring to develop high-surface area catalysts that exhibit intrinsically high catalytic performances, offering insights into how the structural motifs observed with these materials underpin their excellent catalytic properties. These insights will be instrumental for the development of next-generation nanomaterials for sustainable catalysis. In a collaboration with Dr. Yifan Sun, I begin by demonstrating colloidally synthesized WS2 few-layer nanosheets as an active and selective catalyst for the hydrogenation of substituted nitroarene molecules. Owing to nanoscale stabilization effects, these 2D materials exhibit a much higher concentration of surface defects than bulk transition metal dichalcogenides, which exhibit no activity for these catalytic transformations. Collaborative computational studies reveal the sulfur defects and tungsten-terminated edge sites on these nanomaterials are responsible for the activity and selectivity they exhibit for nitroarene hydrogenations. Given that mechanistic insights into the origins of selectivity for these transformations remain rare for non-platinum-group catalysts, these results will be instrumental for the future rational design of sustainable materials for selective organic transformations. Next, I demonstrate both surface-roughened Ru4Al13 bulk crystals (studied in collaboration with Kriti Seth) and classically immiscible ligand-free AgRh alloy nanoparticles as high-performing, acid-stable catalysts for the hydrogen evolution reaction. These studies present two different methods of nanostructuring to achieve high surface area catalytic materials: surface dealloying of bulk crystals and the bottom-up colloidal synthesis of nanoparticles. The high performance of the bulk Ru4Al13 crystals can be attributed to the in-situ formation of a Ru-rich surface that features high-surface area pits and trenches derived from the Al dealloying process. This surface-nanostructuring methodology is potentially generalizable for the future engineering of high surface area crystals of materials for which the direct synthesis of nanoparticles remains a challenge. In contrast, the excellent catalytic properties of the AgRh nanoparticles, which inherently have a high surface area, is derived from synergistic effects between the two alloyed metals. These results represent the first reported utilization of solution-synthesized alloys of metals that are classically immiscible (i.e. stable only on the nanoscale) as a catalyst for electrocatalytic hydrogen evolution, suggesting that this class of materials may be a rich phase space with which sustainable production of hydrogen can be achieved. Finally, I expand my work to high entropy materials, demonstrating the first reported method by which non-noble metals may be incorporated into complex solid solution nanomaterials through one-pot colloidal methods. Homogeneous CuIrPdPtRh and NiIrPdPtRh alloy nanoparticles are synthesized via the hot injection of metal salt precursors into a solution of high boiling point solvents and surfactants. Control studies reveal that the slow injection rates followed by rapid quenching are key for the formation of a single alloy phase. In addition, I demonstrate that this synthetic method may be useful for incorporating high entropy alloy phases into complex heterostructures through preliminary evidence for core-shell particle formation. These advances will be important not only for the future development of tailor-made complex heterostructures, but also for the design of tunable nanomaterials for multi-step catalytic reactions.
Author: Ming Bao
Publisher: Springer Nature
ISBN: 981974573X
Category :
Languages : en
Pages : 228
Get Book Here
Book Description
