銅-鉑/多壁奈米碳管應用於電催化反應之合成與特性研究

Synthesis and Characterization of Cu-Pt/MWCNTs in Electrocatalytic Application

許航睿(Hang-Jui Hsu)

指導教授 ： 林鴻明

大同大學/工程學院/材料工程學系所/碩士(2010年)

摘要

本研究利用高熱傳導性極高表面積之奈米碳管，作為白金以雙金屬Cu-Pt 之
混成系統 應用於燃料電池之陽極觸媒材料。
本研究利用多元醇法合成不同比例之Cu-Pt/MWCNTs 混成材料，利用
XRD、FESEM 以及TEM 分析此混成材料之結構與表面形貌，由XRD 結果得知，
金屬銅與鉑形成固溶結構，由SEM 與TEM 可看出乘載於奈米碳管上之鉑與銅
鉑奈米顆粒，粒徑分別為3~10 奈米及5~15 奈米，利用循環伏安法分析此材料在
甲醇溶液中之電化學特性，由CV 之結果Pt/MWCNTs 之電流密度高於Pt/carbon
black 但低於Cu-Pt/MWCNTs，原因為Cu-Pt 之雙金屬結構以及Cu、Pt 之間之相
互作用，Cu-Pt/MWCNTs 之電化學效應較Pt-MWCNTs 高出一倍之效應，此結果
說明添加Cu 可改善Pt/MWCNts 觸媒在電化學反應中之電化學特性。

關鍵字

奈米碳管 ； 鉑 ； 銅 ； 催化

並列摘要

In this study, the multi-walled carbon nanotubes (MWCNTs) with high thermal
conductivity and surface area are used as a supporter of Pt and bimetallic Cu-Pt
nanocomposite, which are catalysts for anode material in fuel cell.
Cu-Pt nanocomposite with different ratios of Cu and Pt are synthesized on
MWCNTs by polyol method. The structures and morphologies of nano hybrid
catalysts are analyzed by XRD, FESEM and TEM. According to the XRD patterns
of Cu-Pt/MWCNTs, Pt and Cu form the solid solution structure, by polyol process,
the average diameters of Pt and Cu-Pt nanoparticles on MWCNTs can be controlled
within 3-10 nm and 5-15 nm, respectively. The electrocatalytic behavior during
methanol oxidation reactions have been investigated by Cyclic Voltammetry (CV).
According to the results the methanol electrooxidation activity of Pt/MWCNTs is
higher than that of Pt/carbon black but lower than that of Cu-Pt/MWCNTs. The
enhancement of the methanol oxidation activity of Cu-Pt/MWCNTs may relate to the
bimetal structure and the interaction between Cu and Pt., the performance of
Cu-Pt/MWCNTs system in electro catalysis reaction is 100% higher than
Pt/MWCNTs system. In indicates that added Cu improves dramatically on the
performance of Pt/MWCNTs catalysts in electrocatalytic reaction.

並列關鍵字

Pt ； Electrocatalytic Application ； Cu ； MWCNTs

參考文獻

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