Lowering the onset potential of Zr-doped hematite nanocoral photoanodes by Al co-doping and surface modification with electrodeposited Co-Pi.

Herein, in situ zirconium-doped hematite nanocoral (Zr-FeO (I) NC) photoanode was prepared via a specially designed diluted hydrothermal approach and modified with Al co-doping and electrodeposited cobalt-phosphate ("Co-Pi") cocatalyst. Firstly, an unintentional in situ Zr-FeO (I)) NC photoanode was synthesized, which achieved an optimum photocurrent density of 0.27 mA/cm at 1.