Improved H-adsorption ability of Cu in CuNi alloy nanodots toward the efficient photocatalytic H2-evolution activity of TiO2

The CuNi alloy nanodots (2–3 nm) were photoreduced on the rGO/TiO 2 surface and CuNi-rGO/TiO 2 photocatalyst achieved the highest H 2 -production rate, which was 53.7, 38.7, and 1.8 times higher than that of TiO 2 , rGO/TiO 2 , and Cu-rGO/TiO 2 , respectively.