Light-harvesting Ni/TiO₂ nanotubes as photo-electrocatalyst for alcohol oxidation in alkaline media

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• 作者：J.A. Dí ; az-Real^a ; E. Ortiz-Ortega^b ; M.P. Gurrola^a ; J. Ledesma-Garcia^b ; L.G. Arriaga^a ; ^{larriaga@cideteq.mx" class="auth_mail" title="E-mail the corresponding author}
• 关键词：photo-electrocatalyst ; Ni/TiO2 nanotubes ; Microfluidic fuel ; cell
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 July 2016
• 年：2016
• 卷：206
• 期：Complete
• 页码：388-399
• 全文大小：3023 K

文摘

Anodic photo-electrocatalysts comprising anodically grown TiO₂ nanotubes (TiO₂-NT) with an average inner diameter of 70 nm and lengths of 7, 15 and 30 μm with nanoparticulate electrodeposited Ni species (namely NiO, Ni(OH)₂) were synthesized and evaluated for its use as anode for direct methanol fuel cell. The Ni deposit with an average diameter of 200 nm was obtained by cyclic voltammetry from a modified acid Watts bath. Morphology, composition, crystallinity and optical properties were investigated by SEM, EDS, XRD, Raman and diffuse reflectance spectroscopy. UV–vis irradiation coming from a Xe lamp on the anodes increased the current density by 24% in half-cell configuration. Finally, a microfluidic fuel cell was assembled and tested using methanol as fuel reached an OCP of 0.7 V. This finding suggests that such composite materials are promising alternatives for the development of a new generation of hybrid-microfluidic devices.