Snowflake-like hierarchical structured WO3 arrays photoanode with efficient PEC performance

The snowflake-like hierarchical structured WO₃ arrays photoanode was fabricated on the FTO conductive glass. In this hierarchical structured photoanode, a high aspect ratio sandwich-like structure is more conducive to charge transfer, and the unique snowflake like structure can improve carrier separation efficiency. As expected, the obtained snowflake-like hierarchical structured WO₃ arrays photoanode yield improved photocurrent density of 2.3 mA·cm^-2, which is approximately 3.96 times than that of the WO₃ nanosheet arrays photoanode.