Hollow TiO₂@Co₉S₈ Core–Branch Arrays as Bifunctional Electrocatalysts for Efficient Oxygen/Hydrogen Production

Adv. Sci. 2018, 5, 1700772

DOI: 10.1002/advs.201700772

In the originally published article, some errors were found in Figures 2 and 4.

Figure 2.

XPS and Raman characterizations of TiO₂@Co₉S₈ and Co₉S₈ arrays: a) XPS survey spectra; b) core‐level S 2p XPS spectra; c) core‐level Co 2p XPS spectra; and d) Raman spectra of the Co₉S₈ and TiO₂@Co₉S₈ arrays.

Figure 4.

c) Electrochemical stability of the Co₉S₈ and TiO₂@Co₉S₈ electrodes at different current densities and times.

Figure 2a,d accidentally presented the same sample (TiO₂@Co₉S₈) and the corresponding contrast curves from Co₉S₈ were omitted. This is corrected in the updated figure below. Also, Figure 2b,c show the XPS data (S 2p and Co 2p) of both TiO₂@Co₉S₈ and Co₉S₈. In the original figure, the fitting XPS curves were used but the original XPS lines were missing. The authors have determined that this is not strict enough. The XPS lines have been added to the updated figure below.

Figure 4c, accidentally presented the same electrochemical stability tendency of sample (TiO₂@Co₉S₈) and the corresponding contrast curves from Co₉S₈ were omitted. This is corrected in the updated figure below.

The authors state that the corresponding data analysis and conclusions are not affected by these unintentional errors and apologize for any confusion these errors may have caused.