Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, China.
Angew Chem Int Ed Engl. 2017 Oct 9;56(42):12878-12882. doi: 10.1002/anie.201705772. Epub 2017 Aug 23.
This paper describes the introduction of a thin titanium dioxide interlayer that serves as passivation layer and dopant source for hematite (α-Fe O ) nanoarray photoanodes. This interlayer is demonstrated to boost the photocurrent by suppressing the substrate/hematite interfacial charge recombination, and to increase the electrical conductivity by enabling Ti incorporation. The dendritic nanostructure of this photoanode with an increased solid-liquid junction area further improves the surface charge collection efficiency, generating a photocurrent of about 2.5 mA cm at 1.23 V versus the reversible hydrogen electrode (vs. RHE) under air mass 1.5G illumination. A photocurrent of approximately 3.1 mA cm at 1.23 V vs. RHE could be achieved by addition of an iron oxide hydroxide cocatalyst.
本文介绍了一种钛 dioxide 薄膜作为钝化层和掺杂源，用于修饰赤铁矿（α-Fe O ）纳米阵列光电阳极。该薄膜通过抑制基底/赤铁矿界面电荷复合，以及通过 Ti 的掺入来提高电导率，从而提高光电流。这种光电阳极的枝状纳米结构增加了固液界面面积，进一步提高了表面电荷收集效率，在 1.5G 模拟太阳光照射下，在 1.23V 时产生约 2.5mA·cm 的光电流。通过添加氧化铁氢氧化物共催化剂，可在 1.23V 时获得约 3.1mA·cm 的光电流。
