Preparation and characterization of Pt-CeO2/C and Pt-TiO2/C electrocatalysts with improved electrocatalytic activity for methanol oxidation

被引：31
作者：
Hameed, R. M. Abdel [1 ]
Amin, R. S. [2 ]
El-Khatib, K. M. [2 ]
Fetohi, Amani E. [2 ]
机构：
[1] Cairo Univ, Fac Sci, Dept Chem, Giza, Egypt
[2] Natl Res Ctr, Dept Chem Engn, Giza, Egypt
来源：
APPLIED SURFACE SCIENCE | 2016年 / 367卷
关键词：
Methanol; Carbon; Electro-oxidation; Metal oxide; Cyclic voltammetry; Chronoamperometry; WALLED CARBON NANOTUBES; HEATED POLYOL SYNTHESIS; PT-BASED CATALYSTS; ELECTROOXIDATION ACTIVITY; CO OXIDATION; NANOPARTICLES; PERFORMANCE; SUPPORT; IMPEDANCE; PLATINUM;
D O I：
10.1016/j.apsusc.2016.01.087
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pt-TiO2/C and Pt-CeO2/C electrocatalysts were synthesized by solid state reaction of TiO2/C and CeO2/C powders using intermittent microwave heating, followed by chemical reduction of platinum ions using mixed reducing agents of ethylene glycol and sodium borohydride. The crystal structure, surface morphology and chemical composition of prepared electrocatalysts were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive X-ray analysis (EDX). The phase angle values of different Pt diffraction planes in Pt-TiO2/C and Pt-CeO2/C were shifted in the positive direction relative to those in Pt/C. Pt particles with diameter values of 3.06 and 2.78 nm were formed in Pt -TiO2/C and Pt-CeO2/C, respectively. The electrochemical performance of prepared electrocatalysts was examined using cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. Pt-CeO2/C showed an enhanced oxidation current density when compared to Pt/C. Long time oxidation test at Pt-TiO2/C and Pt-CeO2/C revealed their improved stability. Lower charge transfer resistance values were estimated at Pt -metal oxide/C electrocatalysts. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：382 / 390
页数：9
相关论文
共 58 条
[1]   Co-sputtering growth and electro-oxidation properties of Pt-CuO nanocomposites for direct methanol thin film fuel cells [J].
Ahn, Hyo-Jin ;
Shim, Hee-Sang ;
Kim, Won Bae ;
Sung, Yung Eun ;
Seong, Tae-Yeon .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 471 (1-2) :L39-L42
[2]   Pt and PtRu electrocatalysts supported on carbon xerogels for direct methanol fuel cells [J].
Alegre, C. ;
Calvillo, L. ;
Moliner, R. ;
Gonzalez-Exposito, J. A. ;
Guillen-Villafuerte, O. ;
Martinez Huerta, M. V. ;
Pastor, E. ;
Lazaro, M. J. .
JOURNAL OF POWER SOURCES, 2011, 196 (09) :4226-4235
[3]   Preparation and characterization of Pt-CeO2 and Pt-Pd electrocatalysts for the oxygen reduction reaction in the absence and presence of methanol in alkaline medium [J].
Altamirano-Gutierrez, A. ;
Fernandez, A. M. ;
Rodriguez Varela, F. J. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2013, 38 (28) :12657-12666
[4]   Synthesis of Pt-Co nanoparticles on multi-walled carbon nanotubes for methanol oxidation in H2SO4 solution [J].
Amin, R. S. ;
El-Khatib, K. M. ;
Hameed, R. M. Abdel ;
Souaya, Eglal R. ;
Etman, Mohamed A. .
APPLIED CATALYSIS A-GENERAL, 2011, 407 (1-2) :195-203
[5]   ELECTROOXIDATION OF METHANOL AND RELATED COMPOUNDS AT RUTHENIUM DIOXIDE-COATED ELECTRODES [J].
BURKE, LD ;
MURPHY, OJ .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1979, 101 (03) :351-361
[6]   A Novel Structural Design of a Pt/C-CeO2 Catalyst with Improved Performance for Methanol Electro-Oxidation by β-Cyclodextrin Carbonization [J].
Chu, Yuan-Yuan ;
Wang, Zhen-Bo ;
Jiang, Zheng-Zhi ;
Gu, Da-Ming ;
Yin, Ge-Ping .
ADVANCED MATERIALS, 2011, 23 (27) :3100-+
[7]   International activities in DMFC R&D:: status of technologies and potential applications [J].
Dillon, R ;
Srinivasan, S ;
Aricò, AS ;
Antonucci, V .
JOURNAL OF POWER SOURCES, 2004, 127 (1-2) :112-126
[8]   Electrocatalytic enhancement of methanol oxidation by adding CeO2 nanoparticle on porous electrode [J].
Feng Xiaojuan ;
Shi Yanlong ;
Zhou Huijuan .
JOURNAL OF RARE EARTHS, 2012, 30 (01) :29-33
[9]   Spectrokinetic investigation of reverse water-gas-shift reaction intermediates over a Pt/CeO2 catalyst [J].
Goguet, A ;
Meunier, FC ;
Tibiletti, D ;
Breen, JP ;
Burch, R .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (52) :20240-20246
[10]   A novel co-precipitation method for preparation of Pt-CeO2 composites on multi-walled carbon nanotubes for direct methanol fuel cells [J].
Guo, Dao-Jun ;
Jing, Zhi-Hong .
JOURNAL OF POWER SOURCES, 2010, 195 (12) :3802-3805
123456