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Influence of Metal Oxides on Platinum Activity towards Methanol Oxidation in H 2 SO 4 solution
Author(s) -
Hameed R. M. Abdel,
Amin R. S.,
ElKhatib K. M.,
Fetohi Amani E.
Publication year - 2016
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201501072
Subject(s) - chronoamperometry , electrocatalyst , cyclic voltammetry , methanol , dielectric spectroscopy , electrochemistry , platinum , metal , materials science , inorganic chemistry , chemistry , catalysis , nuclear chemistry , electrode , metallurgy , organic chemistry
Pt–CeO 2 /C, Pt–TiO 2 /C, and Pt–ZrO 2 /C electrocatalysts were prepared by using a modified microwave‐assisted polyol process. Physical characterization was performed by using XRD, TEM, and EDX analyses. The incorporation of different metal oxides increased the dispersion degree of Pt nanoparticles and reduced their diameter to 2.50 and 2.33 nm when TiO 2 and ZrO 2 were introduced to Pt/C, respectively. The electrocatalytic activity of various electrocatalysts was examined towards methanol oxidation in H 2 SO 4 solution by using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. Among the studied composites, Pt–ZrO 2 /C was selected to be a candidate electrocatalyst for better electrochemical performance in direct methanol fuel cells.