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This work demonstrates the use of amino functionalized Mg-phyllosilicate clay/Nafion nanocomposite film embedded with Pt nanoparticles (Pt/AC/N) for catalyzing oxygen reduction reaction (ORR) in sulphuric acid medium. Pt/AC/N nanocomposite films were surface characterized using transmission electron microscope. Cyclic and linear scan voltammetry studies were carried out under hydrodynamic conditions taking rotating-ring disc electrode (RRDE) as the working electrode. The effects of clay content, Pt mass loading, electrode rotation rate, and temperature on the ORR kinetics were studied. The Tafel slopes were found to vary between 118 and 126 mV dec―1 indicating a good ORR kinetics. The exchange current density values calculated after mass transfer correction ranged from 5.8 x 10―7 to 2.4 × 10―6 A cm―2. From the RRDE disc currents, Koutecky-Levich plots were constructed and the ORR mechanism was found to follow a four electron path with minimum H2O2 formation of ∼1.6%. The effect of temperature on ORR kinetics was found at 25, 40, and 50 °C. The energy of activation calculated to be 7.68 kJ mol―1 and comparable to the standard Pt/C catalyzed ORR systems.

Titel:	Kinetics and mechanism of electrochemical oxygen reduction using Platinum/clay/Nafion catalyst layer for polymer electrolyte membrane fuel cells
Autor/in / Beteiligte Person:	NARAYANAMOORTHY, B ; DATTA, K. K. R ; BALAJI, S
Link:	E-Journal im Bestand der UB Hagen? View record from PASCAL Archive
Zeitschrift:	Journal of colloid and interface science, Jg. 387 (2012), S. 213-220
Veröffentlichung:	Amsterdam: Elsevier, 2012
Medientyp:	academicJournal
Umfang:	print, 35 ref
ISSN:	0021-9797 (print)
Schlagwort:	Biochemistry, molecular biology, biophysics Biochimie, biologie moléculaire, biophysique General chemistry, physical chemistry Chimie générale, chimie physique Nanotechnologies, nanostructures, nanoobjects Nanotechnologies, nanostructures, nanoobjets Polymers, paint and wood industries Polymères, industries des peintures et bois Sciences exactes et technologie Exact sciences and technology Chimie Chemistry Chimie generale et chimie physique General and physical chemistry Théorie des réactions, cinétique générale. Catalyse. Nomenclature, documentation chimique, informatique chimique Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Catalyse Catalysis Electrochimie Electrochemistry Etat colloïdal et états dispersés Colloidal state and disperse state Etudes physiques et chimiques. Granulométrie. Phénomènes électrocinétiques Physical and chemical studies. Granulometry. Electrokinetic phenomena Sciences appliquees Applied sciences Energie Energy Energie. Utilisation thermique des combustibles Energy. Thermal use of fuels Appareils de production et de conversion d'énergie: énergie thermique, énergie électrique, énergie mécanique, etc Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Piles à combustible Fuel cells Métal transition Transition metal Metal transición Polymère fluor Fluorine containing polymer Polímero flúor Sulfonate polymère Sulfonate polymer Sulfonato polímero Acide sulfurique Sulfuric acid Sulfúrico ácido Argile Clay Arcilla Catálisis Catalyseur Catalyst Catalizador Cinétique Kinetics Cinética Densité courant Current density Densidad corriente Electroquímica Electrode Electrodes Electrodo Electrolyte Electrólito Film Película Hydrodynamique Hydrodynamics Hidrodinámica Membrane polymère Polymeric membrane Membrana polímero Microscope transmission Transmission microscope Microscopio transmisión Microscopie électronique Electron microscopy Microscopía electrónica Milieu acide Acid medium Medio ácido Mécanisme Mechanism Mecanismo Nanocomposite Nanocompuesto Nanoparticule Nanoparticle Nanopartícula Oxygène Oxygen Oxígeno Peroxyde d'hydrogène Hydrogen peroxide Peróxido de hydrogeno Phyllosilicate Filosilicato Pile combustible Fuel cell Pila combustión Platine Platinum Platino Rotation Rotación Réduction chimique Chemical reduction Reducción química Transfert masse Mass transfer Transferencia masa Voltammétrie Voltammetry Voltametría Nafion Aminoclay LSV ORR Pt/aminoclay RRDE
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: Department of Chemistry, Faculty of Science, Sri Chandrasekharendra Saraswathi Viswa Mahavidyalaya (SCSVMV University), Enathur, Kanchipuram 631 561, India ; Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore 560 064, India Rights: Copyright 2015 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Energy ; General chemistry and physical chemistry

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Kinetics and mechanism of electrochemical oxygen reduction using Platinum/clay/Nafion catalyst layer for polymer electrolyte membrane fuel cells