Pt-NiO/C anode electrocatalysts for direct methanol fuel cells

被引：76

作者：

Amin, R. S. ^{[1
]}

Hameed, R. M. Abdel ^{[2
]}

El-Khatib, K. M. ^{[1
]}

Youssef, M. Elsayed ^{[3
]}

Elzatahry, A. A. ^{[4
]}

机构：

[1] Natl Res Ctr, Chem Eng & Pilot Plant Dept, Div Engn, Giza, Egypt

[2] Cairo Univ, Fac Sci, Dept Chem, Giza, Egypt

[3] City Sci Res & Technol Applicat, Informat Res Inst, Comp Based Engn Applicat Dept, Alexandria 21934, Egypt

[4] City Sci Res & Technol Applicat, Polymer Mat Res Dept, Adv Technol & New Mat Res Inst, Alexandria 21934, Egypt

来源：

ELECTROCHIMICA ACTA | 2012年 / 59卷

关键词：

Platinum-nickel oxide; Methanol oxidation; Fuel cells; Carbon black; Electrocatalyst; ENHANCED CATALYTIC DEGRADATION; SMALL ORGANIC-MOLECULES; ETHANOL ELECTROOXIDATION; ELECTROCHEMICAL OXIDATION; PLATINUM NANOPARTICLES; ALCOHOL OXIDATION; CARBON NANOTUBES; ALKALINE MEDIA; NICKEL-OXIDE; THIN-FILMS;

D O I：

10.1016/j.electacta.2011.11.013

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pt catalyst was supported on Vulcan XC-72R containing 5 wt.% NiO using NaBH4 as a reducing agent. The prepared catalyst was heat-treated at 400 degrees C. XRD, TEM and EDX analyses were applied to characterize Pt-NiO/C electrocatalyst. The introduction of NiO reduces the particle size of Pt crystallites. The electrocatalytic activity of Pt-NiO/C electrocatalysts was examined towards methanol oxidation reaction in 0.5 M H2SO4 solution using cyclic voltammetry and chronoamperometry techniques. A three fold increment in the oxidation current density was gained at Pt-NiO/C electrocatalyst compared to Pt/C one. The corresponding chronoamperograms showed high steady state current density values suggesting better stability of Pt-NiO/C electrocatalyst towards the carbonaceous poisoning species. The enhanced electrocatalytic performance and the long-term cycle durability of Pt-NiO/C electrocatalyst are attributed to the strong interaction between Pt and NiO and the formation of small Pt crystals. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：499 / 508

页数：10

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