Efficient Hydrogen Evolution Electrocatalysis Using Cobalt Nanotubes Decorated with Titanium Dioxide Nanodots

TiO 2 Co nanotubes decorated with nanodots (TiO 2 NDs/Co NSNTs‐CFs) are reported as high‐performance earth‐abundant electrocatalysts for the hydrogen evolution reaction (HER) in alkaline solution. TiO 2 NDs/Co NSNTs can promote water adsorption and optimize the free energy of hydrogen adsorption. More importantly, the absorbed water can be easily activated in the presence of the TiO 2 –Co hybrid structure. These advantages will significantly promote HER. TiO 2 NDs/Co NSNTs‐CFs as electrocatalysts show a high catalytic performance towards HER in alkaline solution. This study will open up a new avenue for designing and fabricating low‐cost high‐performance HER catalysts.