论文标题
CNT Fiber/Tio $ _ {2} $ Photelectrodes的界面研究高效H $ _ {2} $生产
Interfacial studies in CNT fibre/TiO$_{2}$ photoelectrodes for efficient H$_{2}$ production
论文作者
论文摘要
一类吸引人的照片（电）化学反应是基于半导体的金属氧化物和纳米碳（例如碳纳米管（CNT），石墨烯）的杂种，其中纳米碳充当高度稳定的导电支架，直到纳米结构的无机相位的无机相位可以固定；一种结构，可最大化表面积并最大程度地减少电荷传输/转移电阻。 tio $ _ {2} $/cnt光轴是由原子层沉积在CNT织物上产生的tio $ _ {2} $生产（$0.07μmol/min $ $ $ $ $ $ $ $ $ $ $ $ H_ {2} $在$ 0.2V $ $ $ $ $ $ agcl $）上，$ _ $ _的compoties有效，在$ 0.2V $ 0.2V \％$ faradaic效率。基于电化学阻抗光谱测量值，该结果与对照样品和较高的表面积相比，基于电化学阻抗光谱测量值大大降低。低TIO $ _ {2} $/CNT界面电荷转移电阻（$10Ω$）与存在界面Ti-O-C键的存在以及使用同步器辐射通过空间分辨的扫描光电显微镜（SPEM）确定的相应的电子杂交。
An attractive class of materials for photo(electro)chemical reactions are hybrids based on semiconducting metal oxides and nanocarbons (e.g. carbon nanotubes (CNT), graphene), where the nanocarbon acts as a highly-stable conductive scaffold onto which the nanostructured inorganic phase can be immobilised; an architecture that maximises surface area and minimises charge transport/transfer resistance. TiO$_{2}$/CNT photoanodes produced by atomic layer deposition on CNT fabrics are shown to be efficient for H$_{2}$ production ($0.07 μmol/min$ $H_{2}$ at $0.2V$ $vs Ag/AgCl$), nearly doubling the performance of TiO$_{2}$ deposited on planar substrates, with $100 \%$ Faradaic efficiency. The results are rationalised based on electrochemical impedance spectroscopy measurements showing a large reduction in photoelectron transport resistance compared to control samples and a higher surface area. The low TiO$_{2}$/CNT interfacial charge transfer resistance ($10 Ω$) is consistent with the presence of an interfacial Ti-O-C bond and corresponding electronic hybridisation determined by spatially-resolved Scanning Photoelectron Microscopy (SPEM) using synchrotron radiation.
