Highly dispersed Cu2O quantum dots (about 2 nm) constructed by a simple functional group anchoring strategy boost the photocatalytic water splitting ability by 72 times

Ultra-small Cu 2 O QDs with an average particle size of only 1.8 nm were anchored on the TiO 2 surface. The QDs are uniformly dispersed and the photocatalytic hydrogen evolution yield is 72 times higher than that of commercial P25.