Correction to: Ultra-fine Cu clusters decorated hydrangea-like titanium dioxide for photocatalytic hydrogen production

1 Correction to: Rare Met. https://doi.org/10.1007/s12598-021-01815-z

In the original publication, Fig. 5 was published with few mistakes. The correct version of Fig. 5 is given in this correction.

Fig. 5

a H₂ evolution rate of samples; b cycle stability of 6Cu–TiO₂; c free energy versus reaction coordinates of TiO₂ and 6Cu–TiO₂ and (inset) 3D differential charge density of 6Cu–TiO₂; d 2D differential charge density of 6Cu–TiO₂, where yellow and blue colors represent positive and negative, respectively