首页|Hierarchical TiO2/ZnO Nanostructure as Novel Non-precious Electrocatalyst for Ethanol Electrooxidation

Hierarchical TiO2/ZnO Nanostructure as Novel Non-precious Electrocatalyst for Ethanol Electrooxidation

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Metal oxides have a higher chemical stability in comparison to metals,so they can be utilized as electrocatalysts if the activity could be enhanced.Besides the composition,the morphology of the nanostructures has a considerable impact on the electrocatalytic activity.In this work,zinc oxide nano branches-attached titanium dioxide nanofibers were investigated as an economic and stable catalyst for ethanol electrooxidation in the alkaline media.The introduced material has been synthesized by electrospinning process followed by hydrothermal technique.Briefly,electrospinning of colloidal solution consisting of titanium isopropoxide,poly(vinyl acetate) and zinc nanoparticles was performed to produce nanofibers embedding solid nanoparticles.In order to produce TiO2 nanofibers containing ZnO nanoparticles,the obtained electrospun nanofiber mats were calcined in air at 600 ℃.The formed ZnO nanoparticles were exploited as seeds to outgrow ZnO branches around the TiO2 nanofibers using the hydrothermal technique at sub-critical water conditions in the presence of zinc nitrate and bis-hexamethylene triamine.The morphology of the final product,as well as the electrochemical measurements indicated that zinc nanoparticles content in the original electrospun nanofibers has a significant influence on the electrocatalytic activity as the best performance was observed with the nanofibers synthesized from electrospun solution containing 0.1 g Zn,and the corresponding current density was 37 mA/cm2.Overall,this study paves a way to titanium dioxide to be exploited to synthesize effective and stable metal oxide-based electrocatalysts.

Direct ethanol fuel cellsElectrospinningNanofibersNon-precious electrocatalystsEthanol electrooxidation

Gehan M.K.Tolba、Nasser A.M.Barakat、A.M. Bastaweesy、E.A. Ashour、Wael Abdelmoez、Mohamed H.El-Newehy、Salem S.Al-Deyab

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Organic Materials and Fiber Engineering Department, Chonbuk National University, Jeonju 561-756, South Korea

Chemical Engineering Department, Faculty of Engineering, Minia University, El-Minia, Egypt

BioNanosystem Department, Chonbuk National University, Jeonju 561-756, South Korea

Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia

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authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding the work throug

RGP-089

2015

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCIEI
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2015.31(1)
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