Photoactivity and scattering behavior of anodically and cathodically deposited hematite photoanodes - a comparison by scanning photoelectrochemical microscopy
Photoactivity and scattering behavior of anodically and cathodically deposited hematite photoanodes - a comparison by scanning photoelectrochemical microscopy
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DOI：
10.1016/j.electacta.2016.03.187
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发表时间：
2016-06-01
影响因子：
6.6
通讯作者：
Wittstock, Gunther
中科院分区：
文献类型：
--
作者：
Kimmich, Daniel;Taffa, Dereje H.;Wittstock, Gunther
在小有机分子作为结构导向剂存在的情况下，通过阳极和阴极电沉积在导电玻璃上制备了两种不同处理方式的纳米赤铁矿电极。由于材料在同一个支架上，所有后续的加工步骤都是相同的。材料在光吸收方面进行了表征。利用拉曼光谱和x射线光电子能谱进行结构表征。用扫描电镜观察其形态。用扫描光电显微镜对两种材料的光电化学性质进行了比较。除了吸收性能外，还比较了材料的散射性能。结果表明，阴极沉积材料越粗糙，光散射效率越高，平均光电流提高4.5倍。(C) 2016年Elsevier Ltd.出版
Two differently processed nanostructured hematite electrodes were prepared by anodic and cathodic electrodeposition in presence of small organic molecules as structure-directing agents on a divided conductive glass. As the materials were on the same support, all subsequent processing steps were identical. The materials were characterized with respect to light absorption. Raman spectroscopy and Xray photoelectron spectroscopy were used for structural characterization. The morphology was assessed by scanning electron microscopy. The photoelectrochemical properties of both materials were compared by scanning photoelectrochemical microscopy in one experiment. Besides absorption properties, the scatttering properties of the materials were compared. It is found that the more rough cathodically deposited material exhibited higher light scattering efficiency and thus showed a 4.5 times higher average photocurrent. (C) 2016 Published by Elsevier Ltd.