Light-harvesting Ni/TiO2 nanotubes as photo-electrocatalyst for alcohol oxidation in alkaline media
Light-harvesting Ni/TiO2 nanotubes as photo-electrocatalyst for alcohol oxidation in alkaline media
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DOI：
10.1016/j.electacta.2016.04.163
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发表时间：
2016-07-10
影响因子：
6.6
通讯作者：
Arriaga, L. G.
中科院分区：
文献类型：
--
作者：
Diaz-Real, J. A.;Ortiz-Ortega, E.;Arriaga, L. G.
合成了阳极生长的TiO_2纳米管（TiO_2-NT）作为直接甲醇燃料电池的阳极光电催化剂，TiO_2-NT的平均内径为70 nm，长度为7、15和30 μ m，纳米颗粒电沉积Ni物种（即NiO，Ni（OH）（2））。通过循环伏安法从改进的酸性Watts镀液中获得平均直径为200 nm的Ni存款。采用SEM、EDS、XRD、拉曼光谱和漫反射光谱等手段对样品的形貌、组成、结晶度和光学性能进行了研究。在半电池配置中，来自阳极上的白炽灯的UV-vis照射使电流密度增加了24%。最后，使用甲醇作为燃料组装和测试了微流体燃料电池，达到0.7 V的OCP。这一发现表明，这种复合材料是开发新一代混合微流体装置的有前途的替代品。(c)2016爱思唯尔有限公司版权所有
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 mu m 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. (c) 2016 Elsevier Ltd. All rights reserved.