Back Cover Image, Volume 6, Number 4, April 2024

Back cover image: BiVO4 is a promising photoanode material for photoelectrocatalytic water decomposition. However, it still suffers from insufficient photoelectrocatalytic efficiency. Liang et al. introduced Fe-doped carbon nitride to increase the light absorption capacity of BIVO4 photoanode and double electrode stacking to boost the light utilization rate. This work is beneficial to the design, preparation, and large-scale application of the next generation of high-performance photoanodes.