Multi-walled carbon nanotubes modified by sulfated TiO2 - A promising support for Pt catalyst in a direct ethanol fuel cell

被引：73

作者：

Guo, Dao-Jun ^{[1
,2
]}

Qiu, Xin-Ping ^{[1
]}

Chen, Li-Quan ^{[1
]}

Zhu, Wen-Tao ^{[1
]}

机构：

[1] Tsinghua Univ, Key Lab Organ Optoelect & Mol Engn, Dept Chem, Beijing 100084, Peoples R China

[2] Qufu Normal Univ, Sch Chem & Chem Engn, Qufu 273165, Shandong, Peoples R China

来源：

CARBON | 2009年 / 47卷 / 07期

基金：

中国博士后科学基金;

关键词：

STATE PROTONIC CONDUCTORS; METHANOL ELECTROOXIDATION; SOLID-STATE; PHOTOCATALYTIC ACTIVITY; ELECTROCATALYST; CONDUCTIVITY; PERFORMANCE; PRECURSORS; OXIDATION; MEMBRANES;

D O I：

10.1016/j.carbon.2009.02.023

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：

We report the synthesis of multi-walled carbon nanotubes coated with sulfated TiO2 (S-TiO2/MWCNTs) as a promising support for Pt catalyst in a direct ethanol fuel cell. Highly dispersed Pt nanoparticles were supported on the S-TiO2/MWCNT composites by NaBH4 reduction procedure (Pt-S-TiO2/MWCNTs). The presence and nature of the catalyst were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, high-resolution transmission electron microscopy The size of the sulfated TiO2 product was about 8 nm, and that of the Pt nanoparticle on the S-TiO2/MWCNT composites was about 5 nm. The Pt-S-TiO2/MWCNTs were used to study the electrochemical ethanol oxidation reaction using cyclic voltammetry, chronoamperometry and impedance spectroscopy The results show that Pt-S-TiO2/MWCNT catalysts show higher catalytic activity for ethanol oxidation compared with Pt supported on non-sulfated TiO2/MWCNT composites and commercial Pt/C catalysts. (C) 2009 Published by Elsevier Ltd.

引用

页码：1680 / 1685

页数：6

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