LaFeO₃ is a p-type oxide that has an ideal bandgap and band edge positions for overall solar water splitting. This study reports an electrochemical synthesis method to produce LaFeO₃ as a high surface area, nanoporous photocathode. The resulting electrode generated a photocurrent density of −0.1 mA/cm² at a potential as positive as 0.73 V vs RHE for photoelectrochemical oxygen reduction with a photocurrent onset potential very close to its flatband potential of 1.45 V vs RHE. Furthermore, without a protection layer, it showed stable photocurrent generation with no sign of photocorrosion. Due to the poor catalytic nature of the LaFeO₃ surface for water reduction, the photocurrent obtained for water reduction was not substantial. However, its photostability and its ability to achieve a photovoltage for water reduction greater than 1.2 V encourage further studies on doping to enhance electron–hole separation as well as interfacing appropriate hydrogen evolution catalysts.

中文翻译：

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电沉积制备的纳米多孔p型LaFeO ₃光电电极的光电性能和稳定性

LaFeO ₃是一种p型氧化物，具有理想的能隙和能带边缘位置，可用于整体太阳能水分解。这项研究报告了一种电化学合成方法，可将LaFeO ₃生产为高表面积的纳米多孔光阴极。所得电极在相对于RHE为0.73 V的正电势下产生的光电流密度为-0.1 mA / cm ²，用于光电化学氧还原，光电流起始电势非常接近其相对于RHE的1.45 V的平带电势。此外，没有保护层，它显示出稳定的光电流产生，没有光腐蚀的迹象。由于LaFeO ₃的不良催化性质在用于减水的表面上，用于减水获得的光电流不是很大。然而，它的光稳定性和达到降低水分电压大于1.2 V的光电压的能力，鼓励对掺杂进行进一步研究以增强电子-空穴分离以及与适当的析氢催化剂进行界面连接。