Correction: Altalhi et al. Cathodic Activation of Titania-Fly Ash Cenospheres for Efficient Electrochemical Hydrogen Production: A Proposed Solution to Treat Fly Ash Waste. Catalysts 2022, 12, 466

The authors regret that, in the original version of this article [1], XRD patterns in Figure 1 displayed the same XRD data with different scalings for two different samples. To solve this concern, we provide the corrected patterns as shown below at the same scale. The XRD plot of FA-TiO₂ sample displays diffraction peaks with lower intensity due to the smaller size of TiO₂ nanocrystals. In addition, the peaks are very slightly shifted to lower diffraction angles, suggesting very slightly larger lattice parameters in accordance with the smaller values of the crystal-size.

Figure 1. XRD patterns of TiO₂ NPs (black) and FA-TiO₂ (red) nanocomposite are prepared using the solvothermal process.

Figure 1. XRD patterns of TiO₂ NPs (black) and FA-TiO₂ (red) nanocomposite are prepared using the solvothermal process.

Also, the authors regret that, in the original version of this article, SEM micrographs in Figure 2a,b and in Figure 11a,b are identical [1]. This was a mistake during the preparation of the figure. We have removed these images and kept the correct ones in Figure 11a,b, as shown below.

Finally, we corrected the particle size distribution in the histogram, and now there is no conflict between the particle size distribution and the particle size seen in the TEM image. After modifying the particle size distribution in the histogram, the average particle size of the FA-TiO₂ catalyst decreased from 13 nm before activation to 5 nm after the cathodic activation, as indicated in Figure 12.