Download or read book Pile au m thanol oxydation directe written by Wilhelmin Têko Napporn and published by . This book was released on 1997 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA REALISATION D'UNE PILE AU METHANOL A OXYDATION DIRECTE NECESSITE UNE ETUDE FONDAMENTALE PERMETTANT LA COMPREHENSION DES REACTIONS QUI SE PRODUISENT AUX ELECTRODES. LA REACTION D'OXYDATION DU METHANOL SUR LE PLATINE EN MILIEU ACIDE EST SOUVENT INCOMPLETE ET IMPLIQUE LA FORMATION D'INTERMEDIAIRES FORTEMENT ADSORBES COMME LE CO#A#D#S. CETTE ESPECE EST CONSIDEREE COMME LE POISON DES CATALYSEURS A BASE DE PLATINE UTILISES A L'ANODE. UNE ETUDE DE L'OXYDATION DE CH#3OH ET DE SES DERIVES PAR OXYDATION (HCHO, HCOOH ET CO) SUR LE PLATINE EN MILIEU ACIDE A ETE REALISEE PAR LA MICROBALANCE ELECTROCHIMIQUE A CRISTAL DE QUARTZ. LA COMPARAISON DES VARIATIONS DE MASSE OBTENUES AU COURS DE L'ELECTROOXYDATION DE CH#3OH ET CO MONTRE QUE LA QUANTITE DE CO#A#D#S A LA SURFACE DE PLATINE AUGMENTE AVEC LA CONCENTRATION DU METHANOL. CECI CONFIRME LES RESULTATS DEJA OBTENUS AVEC LA SPECTROSCOPIE INFRAROUGE DE REFLEXION IN SITU. LA PARTIE LA PLUS IMPORTANTE DE CE TRAVAIL CONCERNE LA MODIFICATION DU PLATINE PAR INCORPORATION AU SEIN D'UN POLYMERE CONDUCTEUR DE PETITES PARTICULES DE METAUX CATALYTIQUES. AINSI L'AJOUT DE RUTHENIUM ET/OU D'ETAIN AU PLATINE A PERMIS D'OBTENIR DES ELECTRODES AYANT D'IMPORTANTES ACTIVITES CATALYTIQUES VIS A VIS DE L'OXYDATION DU METHANOL ET DE SES DERIVES. L'ALLIAGE BIMETALLIQUE PT-RU APPARAIT JUSQU'ICI LE MEILLEUR CATALYSEUR POUR L'OXYDATION DU METHANOL, TANDIS QUE POUR CELLE DE HCHO, HCOOH OU CO, PT-SN EST LE PLUS ACTIF. AVEC CETTE DERNIERE ELECTRODE, LE COEFFICIENT DE DIFFUSION DE CO A PU ETRE DETERMINER. CERTAINES DE CES ELECTRODES ONT ETE UTILISEES DANS DES PILES COMPLETES H#2 / O#2 ET CH#3OH / O#2 DONT LES CARACTERISTIQUES COURANT-TENSION ONT ETE DETERMINEES

Download or read book Piles a Combustible Alimentees par un Combustible Liquide written by and published by Ed. Techniques Ingénieur. This book was released on with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Etude de nouvelles structures d lectrodes catalytiques pour pile au m thanol oxydation directe en milieu acide written by GILLES.. MELI and published by . This book was released on 1993 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA PILE AU METHANOL A OXYDATION DIRECTE PERMET DE CONVERTIR L'ENERGIE CHIMIQUE EN ENERGIE ELECTRIQUE, EN EVITANT LA PRESENCE D'UN REFORMEUR QUI ACCROIT LA COMPLEXITE DU SYSTEME. CEPENDANT, LA COMBUSTION ELECTROCHIMIQUE DIRECTE DU METHANOL EST LIMITEE PAR SA FAIBLE REACTIVITE, MEME SUR LE PLATINE. CE TRAVAIL DE THESE PRESENTE DES RESULTATS CONCERNANT DES ELECTRODES MODIFIEES CONSTITUEES DE MEMBRANES ECHANGEUSES D'IONS QUI JOUENT LE ROLE A LA FOIS DE SUPPORT DE CATALYSEUR ET AUSSI D'ELECTROLYTE POLYMERE SOLIDE. L'EMPLOI DE CES NOUVEAUX POLYMERES CONDUCTEURS A PERMIS D'OBTENIR UNE DISPERSION TRES GRANDE DU PLATINE. DE PLUS, L'EMPOISONNEMENT S'EST AVERE ETRE MOINS IMPORTANT QUE SUR LE PLATINE MASSIQUE. EN INCORPORANT UN SECOND METAL, LE POTENTIEL D'OXYDATION DU METHANOL S'EST DECALE VERS LES POTENTIELS NEGATIFS. PAR AILLEURS, LA SELECTIVITE VIS-A-VIS DE LA FORMATION DE CO#2 EST SENSIBLEMENT SUPERIEURE POUR LES COMPOSITES BINAIRES ET TERNAIRES PAR RAPPORT AU COMPOSITE CONSTITUE SEULEMENT DE PT. LES PERFORMANCES DE CES ELECTRODES ONT AUSSI ETE LARGEMENT AMELIOREES PAR L'EMPLOI DU METHANOL DANS SA PHASE VAPEUR. L'UN DES SOUCIS ECONOMIQUES LIE A L'UTILISATION DE CE TYPE DE PILE EST LE COUT EXCESSIF DE LA MEMBRANE NAFION#R. DE NOUVELLES MEMBRANES ONT MONTRE, POUR CERTAINES D'ENTRE ELLES, UNE APTITUDE A L'UTILISATION EN TANT QU'ELECTROLYTES POLYMERES SOLIDES, IDENTIQUE SINON MEILLEURE A LA MEMBRANE NAFION#R. TOUTEFOIS, IL EST APPARU QUE LES NOUVELLES MEMBRANES LES PLUS PERFORMANTES ETAIENT AUSSI LES PLUS PERMEABLES AU METHANOL

Download or read book Oxydation lectrochimique du m thanol dans les piles combustibles written by and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oxydation lectrochimique du m thanol dans les piles combustibles written by Michel Prigent and published by . This book was released on 1964 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fuel Cell Catalysis written by Andrzej Wieckowski and published by John Wiley & Sons. This book was released on 2009-04-20 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wiley Series on Electrocatalysis and Electrochemistry Fuel Cell Catalysis A Surface Science Approach A Core reference on fuel cell catalysis Fuel cells represent an important alternative energy source and a very active area of research. Fuel Cell Catalysis brings together world leaders in this field, providing a unique combination of state-of-the-art theory and computational and experimental methods. With an emphasis on understanding fuel cell catalysis at the molecular level, this text covers fundamental principles, future challenges, and important current research themes. Fuel Cell Catalysis: Provides a molecular-level description of catalysis for low-temperature polymer-electrolyte membrane fuel cells, including both hydrogen-oxygen cells and direct alcohol cells Examines catalysis issues of both anode and cathode such as oxygen reduction, alcohol oxidation, and CO tolerance Features a timely and forward-looking approach through emphasis on novel aspects such as computation and bio-inspiration Reviews the use and potential of surface-sensitive techniques like vibrational spectroscopy (IR, Raman, nonlinear spectroscopy, laser), scanning tunneling microscopy, X-ray scattering, NMR, electrochemical techniques, and more Reviews the use and potential of such modern computational techniques as DFT, ab initio MD, kinetic Monte Carlo simulations, and more Surveys important trends in reactivity and structure sensitivity, nanoparticles, "dynamic" catalysis, electrocatalysis vs. gas-phase catalysis, new experimental techniques, and nontraditional catalysts This cutting-edge collection offers a core reference for electrochemists, electrocatalysis researchers, surface and physical chemists, chemical and automotive engineers, and researchers in academia, research institutes, and industry.

Download or read book Direct Energy Conversion Literature Abstracts written by and published by . This book was released on 1965 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal de Physique written by and published by . This book was released on 1993 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Copper and Bronze in Art written by David A. Scott and published by Getty Publications. This book was released on 2002 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a review of 190 years of literature on copper and its alloys. It integrates information on pigments, corrosion and minerals, and discusses environmental conditions, conservation methods, ancient and historical technologies.

Download or read book Annual Report written by National Research Council Canada and published by . This book was released on 1996 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coal Tar Creosote written by C. Melber and published by WHO. This book was released on 2004 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: On cover: IPCS International Programme on Chemical Safety. Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organization and the World Health Organization, and produced within the framework of the Inter-organization Programme for the Sound Management of Chemicals (IOMC)

Download or read book Gazette Du Bureau Des Brevets written by Canadian Intellectual Property Office. Patent Office and published by . This book was released on 1997 with total page 1378 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Reaction Engineering written by Octave Levenspiel and published by John Wiley & Sons. This book was released on 1998-09-01 with total page 689 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical reaction engineering is concerned with the exploitation of chemical reactions on a commercial scale. It's goal is the successful design and operation of chemical reactors. This text emphasizes qualitative arguments, simple design methods, graphical procedures, and frequent comparison of capabilities of the major reactor types. Simple ideas are treated first, and are then extended to the more complex.

Download or read book Nuclear Waste Conditioning written by France. Commissariat à l'énergie atomique (CEA) and published by Le Moniteur Editions. This book was released on 2009 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photosensitisation written by Giuliana Moreno and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation induces a variety of chemical processes in biological tissues. This volume is a synthesis of up-to-the-minute reviews on such photochemical and photobiological sensitized reactions with particular relevance to photomedicine. The first part gives a description of experimental techniques for the study of the primary processes after radiation absorption by biological systems. It is followed by chapters on singlet oxygen and photomedicine, considering both phototherapy and photochemotherapy. These sections also discuss the next generation of potential photosensitizing drugs.

Download or read book Ayurvedic Medicinal Plants of India Vol 1 written by R.K. Bhutya and published by Scientific Publishers. This book was released on 2011-03-01 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years interest in medicinal plants has increased considerably world wide. It is felt that there is no single book available which contains all aspects of medicinal plant as Ayurvedic, botanical, ecological, chemical and medicinal information regarding the same plant species. No any book available that have good and disguisable colour photos of every medicinal plant. This is the first book which have more than 500 coloured photos of Indian sub-continental. Here are more than 5000 useful and experienced clinical formulas. This book endeavored to fill up this blank by bringing out this work. This profusely illustrated book will be immensely useful to Ayurvedic students of under-graduates and post-graduates courses, Ayurvedic doctors, lecturers, researchers, students of botany, scientists, pharmacologists, pharmaceutical organizations, pharmacists, biochemists, medical men and even common men. This book contains following data.

Download or read book Chemical Oxidation Applications for Industrial Wastewaters written by Olcay Tunay and published by IWA Publishing. This book was released on 2010-10-12 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the most recent scientific and technological developments (state-of-the-art) in the field of chemical oxidation processes applicable for the efficient treatment of biologically-difficult-to-degrade, toxic and/or recalcitrant effluents originating from different manufacturing processes. It is a comprehensive review of process and pollution profiles as well as conventional, advanced and emerging treatment processes & technologies developed for the most relevant and pollution (wet processing)-intensive industrial sectors. It addresses chemical/photochemical oxidative treatment processes, case-specific treatability problems of major industrial sectors, emerging (novel) as well as pilot/full-scale applications, process integration, treatment system design & sizing criteria (figure-of-merits), cost evaluation and success stories in the application of chemical oxidative treatment processes. Chemical Oxidation Applications for Industrial Wastewaters is an essential reference for lecturers, researchers, industrial and environmental engineers and practitioners working in the field of environmental science and engineering. Visit the IWA WaterWiki to read and share material related to this title: http://www.iwawaterwiki.org/xwiki/bin/view/Articles/CHEMICALOXIDATIONAPPLICATIONSFORINDUSTRIALWASTEWATERS Authors: Professor Olcay Tünay, Professor Isik Kabdasli, Associate Professor Idil Arslan-Alaton and Assistant Professor Tugba Ölmez-Hanci, Environmental Engineering Department, Istanbul Technical University, Turkey.