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 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.