 The abstract states that it is important to develop more efficient and cost-effective bifunctional electrocatalysts for oxygen-slash-hydrogen-evolution reactions, OER-slash-HER. It also explains how a new type of binder-free hollow-T02 at co-9S8 core branch arrays was created using a facile and powerful sulfurization strategy. This new material has been shown to have exceptional electrocatalytic performance, with low over-potentials of 240 and 139 mV at 10 mA Cm, 2 and low taffle slopes of 55 and 65 mV December 1 for OER and HER in alkaline medium, respectively. Furthermore, this material can be used as both cathode and anode in an electrolysis cell, resulting in a remarkably low water-splitting voltage of 1.56 V at 10 mA Cm, 2 and long-term durability without any decay after 10 days. This article was offered by Xingzhu Edeng, Yu Zhong, Yin Xiang Zeng, and others. We are article.tv, links in the description below.