Mesoporous Iron-doped MoS<sub>2</sub>/CoMo<sub>2</sub>S<sub>4</sub> Heterostructures through Organic–Metal Cooperative Interactions on Spherical Micelles for Electrochemical Water Splitting
Yanna Guo, Jing Tang, Joel Henzie, Bo Jiang, Wei Xia, Tao Chen, Yoshio Bando, Yong‐Mook Kang, Md. Shahriar A. Hossain, Yoshiyuki Sugahara, Yusuke Yamauchi
Abstract
Mesoporous metal sulfide hybrid (meso-MoS2/CoMo2S4) materials via a soft-templating approach using diblock copolymer polystyrene-block-poly(acrylic acid) micelles are reported. The formation of the meso-MoS2/CoMo2S4 heterostructures is based on the sophisticated coassembly of dithiooxamide and metal precursors (i.e., Co2+, PMo12), which are subsequently annealed in nitrogen atmosphere to generate the mesoporous material. Decomposing the polymer leaves behind mesopores throughout the spherical MoS2/CoMo2S4 hybrid particles, generating numerous electrochemical active sites in a network of pores that enable faster charge transfer and mass/gas diffusion that enhance the electrocatalytic performance of MoS2/CoMo2S4. Doping the spherical meso-MoS2/CoMo2S4 heterostructures with iron improves the electronic properties of the hybrid meso-Fe-MoS2/CoMo2S4 material and consequently results in its superior electrochemical activities for both hydrogen evolution reaction and oxygen evolution reaction.