Hematite is recognized as a promising photoanode for photoelectrochemical water oxidation to produce solar hydrogen due to its favorable properties. However, the high charge carrier recombination rate due to low electrical conductivity and sluggish oxygen reduction kinetics of pure hematite hinder its photocatalytic activity. This work proposed a new hematite-based heterostructure of Ti-Fe₂O₃/Fe₂TiO₅/FeOOH, synthesized through a hydrothermal method. The photoanode morphology was branched nanorods that expanded their surface area and improved charge transfer at the photoanode/electrolyte interface. In a novel and complement modification approach, a thin pseudobrookite interlayer was applied between β-FeOOH electrocatalyst and Ti-doped hematite to suppress charge recombination, and enhance charge separation, leading to 32% and 26% increase in photocurrent and solar to current efficiency, respectively. The photoanode exhibited a great improvement with the photocurrent density of 1.63 mA/cm² at V=1.5 V vs. RHE and the total electrical resistance of 2.3 kΩ.cm² compared to the pure hematite.

赤铁矿因其良好的性能而被公认为是一种有前途的光阳极，可用于光电化学水氧化生产太阳能氢。然而，由于纯赤铁矿的低电导率和缓慢的氧还原动力学而导致的高载流子复合率阻碍了其光催化活性。这项工作提出了一种新的基于赤铁矿的Ti-Fe ₂ O ₃ / Fe ₂ TiO ₅异质结构。/ FeOOH，通过水热法合成。光电阳极的形态是分支的纳米棒，可扩展其表面积并改善光电阳极/电解质界面处的电荷转移。在一种新颖的补体修饰方法中，在β-FeOOH电催化剂和掺Ti的赤铁矿之间施加了薄假板钛矿夹层，以抑制电荷复合，并增强电荷分离，从而导致光电流和太阳能电流效率分别提高32％和26％，分别。光电阳极显示出1.63毫安/平方厘米的光电流密度有很大的改进²在V = 1.5 V，相对于RHE和2.3kΩ.cm的总电阻²相比于纯的赤铁矿。