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Novel titanium-supported nanoporous network bimetallic Pt-Ir/Ti electrocatalysts (Sl:Pt59Ir41/Ti, 52:Pt44Ir56/Ti, S3:Pt22Ir78/Ti) have been successfully fabricated by the hydrothermal process. The nanoparticles of Pt and Ir were deposited on the titanium substrates in the presence of formaldehyde as a reduction agent. The electrocatalytic activity of these electrocatalysts towards formic acid oxidation in 0.5 M H2SO4 + 0.5 M HCOOH solutions was investigated using cyclic voltammograms (CVs), linear sweep voltammograms (LSVs), chrono amperometry and electrochemical impedance spectroscopy (EIS). The CVs of Sl, S2 and S3 exhibit two anodic peaks in the forward scan and one anodic peak in the reverse scan which are similar to the pure Pt. Their LSVs show that the three samples present significantly high current densities of formic acid oxidation compared to the Pt electrode. It is observed from the chrono amperometric measurements at potential 600 mV that the sample S2 delivers a steady-state current density that is 545 times larger than that for the pure Pt electrode. EIS analysis shows that the impedances on both the imaginary and real axes of S1, S2 and S3 are much lower than those of the pure Pt. Among the three samples (Sl, S2 and S3), S2 exhibits the highest electrocatalytic activity towards the formic acid oxidation.

Titel:	Titanium-supported nanoporous bimetallic Pt-Ir electrocatalysts for formic acid oxidation
Autor/in / Beteiligte Person:	QINGFENG, YI ; AICHENG, CHEN ; WU, HUANG ; JINGJING, ZHANG ; XIAOPING, LIU ; GUORONG, XU ; ZHIHUA, ZHOU
Link:	E-Journal im Bestand der UB Hagen? View record from PASCAL Archive
Zeitschrift:	Electrochemistry communications, Jg. 9 (2007), Heft 7, S. 1513-1518
Veröffentlichung:	Amsterdam; Lausanne; New York, NY: Elsevier Science, 2007
Medientyp:	academicJournal
Umfang:	print, 21 ref
ISSN:	1388-2481 (print)
Schlagwort:	General chemistry, physical chemistry Chimie générale, chimie physique Energy Énergie Sciences exactes et technologie Exact sciences and technology Sciences appliquees Applied sciences Energie 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 Catalyseur sur support Supported catalyst Catalizador sobre soporte Chronoampérométrie Chronoamperometry Cronoamperimetría Composé intermétallique Intermetallic compound Compuesto intermetálico Electrocatalyse Electrocatalysis Electrocatálisis Formique acide Formic acid Fórmico ácido Iridium alliage Iridium alloy Iridio aleación Matériau nanoporeux Nanoporous materials Microscopie électronique balayage Scanning electron microscopy Microscopía electrónica barrido Morphologie Morphology Morfología Oxydation Oxidation Oxidación Pile combustible Fuel cell Pila combustión Platine alliage Platinum alloy Platino aleación Réaction électrochimique Electrochemical reaction Reacción electroquímica Spectrométrie impédance électrochimique Electrochemical impedance spectroscopy Structure surface Surface structure Estructura superficie Sulfurique acide Sulfuric acid Sulfúrico ácido Synthèse hydrothermale Hydrothermal synthesis Titane Titanium Titanio Formic acid oxidation Hydrothermal process Nanoporous electrocatalyst
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China ; Department of Chemistry, Lakehead University, Thunder Bay, Ontario, P7B 5E1, Canada Rights: Copyright 2007 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

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Titanium-supported nanoporous bimetallic Pt-Ir electrocatalysts for formic acid oxidation