Hierarchical construction of hollow NiCo2S4 nanotube@NiCo2S4 nanosheet arrays on Ni foam as an efficient and durable electrocatalyst for hydrogen evolution reaction. - Bai, Lei; Song, Ailing; Lei, Xinyue; Zhang, Tianhong; Song, Shenglu; Tian, Hao; Liu, Hao; Qin, Xiujuan; Wang, Guoxiu; Shao, Guangjie (International Journal of Hydrogen Energy, 2022)