High‐Density CuBi 2 O 4 Photocathodes Using Well‐Textured Buffer Layers and Their Unassisted Solar Hydrogen Production Performances (Small 22/2025)

Solar Hydrogen Production In article number 2411800, Hyung Koun Cho and co‐workers synthesized a highly crystalline CuBi 2 O 4 absorber to enhance the onset potential, by utilizing an Sb‐doped Cu 2 O buffer layer prepared via electrodeposition. The optimized CuBi 2 O 4 photocathode is integrated with a BiVO 4 photoanode to achieve efficient unbiased hydrogen production, coupled with glycerol oxidation.