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首页> 外文期刊>RSC Advances >Fabrication of SiO2 incorporated ordered mesoporous TiO2 composite films as functional Pt supports for photo-electrocatalytic methanol oxidation
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Fabrication of SiO2 incorporated ordered mesoporous TiO2 composite films as functional Pt supports for photo-electrocatalytic methanol oxidation

机译：SiO2掺入有序介孔TiO2复合薄膜作为功能性Pt载体的制备，用于光电催化甲醇氧化

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摘要

SiO2 incorporated ordered mesoporous TiO2 composite films (TS) have been fabricated on FTO glass through a sol-gel progress, and applied as a Pt catalyst support material for direct methanol fuel cells. In this work, we investigate the effects of a different SiO2 doping content and calcination temperature on the structure and corresponding properties of the resulting TiO2-SiO2 films. Characterization techniques including X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) are used to characterize the synthesized films. Potentiostatic pulse electrodeposition is employed to deposit Pt on the ordered mesoporous TiO2-SiO2 films. The results reveal that the films possess a 2D hexagonal mesoporous structure and the Si elements are uniformly dispersed in the TiO2 matrix. Moreover, an ordered mesoporous Pt/TiO2-SiO2 film electrode calcinated at 500 degrees C with 7.5 wt% of SiO2 shows enhanced catalytic activity for methanol oxidation, due to the high photoelectric response and the special synergetic effects between Pt and the TiO2-SiO2 films under UV illumination.
机译：通过溶胶-凝胶技术已在FTO玻璃上制备了掺入SiO2的有序介孔TiO2复合膜（TS），并将其用作直接甲醇燃料电池的Pt催化剂载体材料。在这项工作中，我们研究了不同的SiO2掺杂含量和煅烧温度对所得TiO2-SiO2膜的结构和相应性能的影响。包括X射线衍射（XRD），傅里叶变换红外（FT-IR）光谱，场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）在内的表征技术用于表征合成膜。恒电位脉冲电沉积用于将Pt沉积在有序的介孔TiO2-SiO2膜上。结果表明，该膜具有二维六方晶介孔结构，Si元素均匀分散在TiO2基体中。此外，有序介孔的Pt / TiO2-SiO2薄膜电极在500摄氏度下煅烧了7.5 wt％的SiO2，由于高的光电响应和Pt与TiO2-SiO2薄膜之间的特殊协同作用，显示出增强的甲醇氧化催化活性。在紫外线照射下。

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