Electrochemical Promotion of Rhodium Catalyst

Electrochemical Promotion of Rhodium Catalyst PDF Author: Ivan Bolzonella
Publisher:
ISBN:
Category :
Languages : en
Pages : 180

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Book Description

Electrochemical Promotion of Rhodium Catalyst

Electrochemical Promotion of Rhodium Catalyst PDF Author: Ivan Bolzonella
Publisher:
ISBN:
Category :
Languages : en
Pages : 180

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Book Description


Chemical and Electrochemical Promotion of Supported Rhodium Catalyst

Chemical and Electrochemical Promotion of Supported Rhodium Catalyst PDF Author: Olena Baranova
Publisher:
ISBN:
Category :
Languages : en
Pages : 222

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Electrochemical Promotion of Nitric Oxide Reduction Over Rhodium Catalyst

Electrochemical Promotion of Nitric Oxide Reduction Over Rhodium Catalyst PDF Author: Alain Fankhauser
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Recent Advances in Electrochemical Promotion of Catalysis

Recent Advances in Electrochemical Promotion of Catalysis PDF Author: Philippe Vernoux
Publisher: Springer Nature
ISBN: 3031138937
Category : Science
Languages : en
Pages : 386

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Book Description
This contributed volume provides a critical review of research in the field of Electrochemical Promotion of Catalysis (EPOC). It presents recent developments during the past decade that have led to a better understanding of the field and towards applications of the EPOC concept. The chapters focus on the implementation of EPOC for developing sinter-resistant catalysts, catalysts for hydrogen production, ammonia production and carbon dioxide valorization. The book also highlights the developments towards electropromoted dispersed catalysts and for self-sustained electrochemical promotion which are currently expanding. This authoritative analysis of EPOC is useful for various scientific communities working at the interface of heterogeneous catalysis, solid state electrochemistry and materials science. It is of particular interest to groups whose research focuses on developments towards a better and more sustainable future.

Electrochemical Activation of Catalysis

Electrochemical Activation of Catalysis PDF Author: Costas G. Vayenas
Publisher: Springer Science & Business Media
ISBN: 0306475510
Category : Science
Languages : en
Pages : 597

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Book Description
I knew nothing of the work of C. G. Vayenas on NEMCA until the early nineties. Then I learned from a paper of his idea (gas interface reactions could be catalyzed electrochemically), which seemed quite marvelous; but I did not understand how it worked. Consequently, I decided to correspond with Professor Vayenas in Patras, Greece, to reach a better understanding of this concept. I think that my early papers (1946, 1947, and 1957), on the relationship between the work function of metal surfaces and electron transfer reactions thereat to particles in solution, held me in good stead to be receptive to what Vayenas told me. As the electrode potential changes, so of course, does the work function at the interface, and gas metal reactions there involve adsorbed particles which have bonding to the surface. Whether electron transfer is complete in such a case, or whether the effect is on the desorption of radicals, the work function determines the strength of their bonding, and if one varies the work function by varying the electrode potential, one can vary the reaction rate at the interface. I got the idea. After that, it has been smooth sailing. Dr. Vayenas wrote a seminal article in Modern Aspects of Electrochemistry, Number 29, and brought the field into the public eye. It has since grown and its usefulness in chemical catalytic reactions has been demonstrated and verified worldwide.

Synthesis and Electrochemistry of Rhodium Catalyst Analogues

Synthesis and Electrochemistry of Rhodium Catalyst Analogues PDF Author: Hayley L. Lillo
Publisher:
ISBN:
Category : Rhodium compounds
Languages : en
Pages : 40

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Book Description
"Catalysts are used frequently in industry to expedite chemical processes; organometallic catalysts have specifically increased in usage for this purpose due to their high selectivity and activity.' Wilkinson's catalyst is a well-studied example of an organometallic catalyst, formally known as tris(triphenylphosphine) rhodium(I) chloride, discovered by Sir Geoffrey Wilkinson in 1964. Wilkinson earned a Noble Prize for this work in 1973. The complex is known to catalyze the hydrogenation of alkenes and alkynes; this mechanism is well-studied and is used for a few different pharmaceutical and manufacturing processes. However, surprisingly the electrochemical and basic redox properties of Wilkinson's catalyst are not given much attention in the literature. It is inquired whether oxidation of the center rhodium atom of Wilkinson's catalyst from a+ 1 to a +2 oxidation state will achieve catalytic ability. In addition, the substitution of different ligands to the phenyl rings of Wilkinson's catalyst could tune the electronics of the complex to accomplish catalytic ability. These ideas were both observed in this research. Analogues of Wilkinson's catalyst, or complexes where ligands were substituted on the phenyl rings of the catalyst, were synthesized and characterized; substitutions took place at the para position of the phenyl rings. Afterwards, the analogues were characterized by infrared spectroscopy (IR) and nuclear magnetic resonance (NMR) to characterize their structure. The electrochemical properties of the analogues were observed by cyclic voltammetry (CV). From these cyclic voltammograms, the oxidation peaks of the analogues were observed to analyze the electronics of these complexes. The results of this research will be examined in the following." -- From page 1.

Spillover and Mobility of Species on Solid Surfaces

Spillover and Mobility of Species on Solid Surfaces PDF Author: A. Guerrero-Ruiz
Publisher: Elsevier
ISBN: 0080539742
Category : Technology & Engineering
Languages : en
Pages : 501

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Book Description
"Spillover and Mobility of Species and Solid Surfaces" collects the papers which were presented at the Fifth International Conference Spillover, either as oral or poster contributions, as well as the summaries of the invited lectures. This congress and its publication in the Studies on Surface Science and Catalysis series follow the tradition of previous conferences on spillover, initiated in Lyon, 1983, and continued in Leipzig, 1989, Kyoto 1993 and Dalian, 1997. For the fifth conference, held in S.L. el Escorial (Madrid), the organising committee has attempted to compile representative contributions which illustrate the advances in understanding the spillover phenomenon since 1997. Spillover is a process taking place during the interface of gas reactant molecules (mainly hydrogen and oxygen) on solid surfaces. However, different contributions to the more general area of the chemistry at surfaces, related with the mobility and migration of species, diffusion through membranes, fuel cell catalysts, etc., have also been included. In fact the title of the present volume summarizes this attempt to extend the conference topics towards dynamics at surfaces.Among the 70 contributions received, the 56 accepted papers were selected on the basis of the reports of at least two international reviewers, according to standards comparable to those applied for other specialised journals. These papers are from 21 different countries.

Emissions Control Catalysis

Emissions Control Catalysis PDF Author: Ioannis V. Yentekakis
Publisher: MDPI
ISBN: 3039360361
Category : Science
Languages : en
Pages : 448

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Book Description
The important advances achieved over the past years in all technological directions (industry, energy, and health) contributing to human well-being are unfortunately, in many cases, accompanied by a threat to the environment, with photochemical smog, stratospheric ozone depletion, acid rain, global warming, and finally climate change being the most well-known major issues. These are the results of a variety of pollutants emitted through these human activities. The indications show that we are already at a tipping point that might lead to non-linear and sudden environmental change on a global scale. Aiming to tackle these adverse effects in an attempt to mitigate any damage that has already occurred and to ensure that we are heading toward a cleaner (green) and sustainable future, scientists around the world are developing tools and techniques to understand, monitor, protect, and improve the environment. Emissions control catalysis is continuously advancing, providing novel, multifunctional, and optimally promoted using a variety of methods, nano-structured catalytic materials, and strategies (e.g., energy chemicals recycling, cyclic economy) that enable us to effectively control emissions, either of mobile or stationary sources, improving the quality of air (outdoor and indoor) and water and the energy economy. Representative cases include the abatement and/or recycling of CO2, CO, NOx, N2O, NH3, CH4, higher hydrocarbons, volatile organic compounds (VOCs), particulate matter, and specific industrial emissions (e.g., SOx, H2S, dioxins aromatics, and biogas). The “Emissions Control Catalysis” Special Issue has succeeded in collecting 22 high-quality contributions, included in this MDPI open access book, covering recent research progress in a variety of fields relevant to the above topics and/or applications, mainly on: (i) NOx catalytic reduction from cars (i.e., TWC) and industry (SCR) emissions; (ii) CO, CH4, and other hydrocarbons removal, and (iii) CO2 capture/recirculation combining emissions control with added-value chemicals production.

Energy and Electrochemical Processes for a Cleaner Environment

Energy and Electrochemical Processes for a Cleaner Environment PDF Author: Christos Comninellis
Publisher: The Electrochemical Society
ISBN: 9781566773560
Category : Technology & Engineering
Languages : en
Pages : 538

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Rhodium Catalyzed Hydroformylation

Rhodium Catalyzed Hydroformylation PDF Author: Piet W.N.M. van Leeuwen
Publisher: Springer Science & Business Media
ISBN: 0306469472
Category : Science
Languages : en
Pages : 291

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Book Description
In the last decade there have been numerous advances in the area of rhodium-catalyzed hydroformylation, such as highly selective catalysts of industrial importance, new insights into mechanisms of the reaction, very selective asymmetric catalysts, in situ characterization and application to organic synthesis. The views on hydroformylation which still prevail in the current textbooks have become obsolete in several respects. Therefore, it was felt timely to collect these advances in a book. The book contains a series of chapters discussing several rhodium systems arranged according to ligand type, including asymmetric ligands, a chapter on applications in organic chemistry, a chapter on modern processes and separations, and a chapter on catalyst preparation and laboratory techniques. This book concentrates on highlights, rather than a concise review mentioning all articles in just one line. The book aims at an audience of advanced students, experts in the field, and scientists from related fields. The didactic approach also makes it useful as a guide for an advanced course.