Three-Dimensional Ternary Hybrid Architectures Constructed from Graphene, MoS<sub>2</sub>, and Graphitic Carbon Nitride Nanosheets as Efficient Electrocatalysts for Hydrogen Evolution
Minmin Yan, Quanguo Jiang, Lu Yang, Haiyan He, Huajie Huang
Abstract
Electrocatalytic materials for hydrogen production through water splitting are becoming a hotspot in the renewable energy field. In this work, we present a bottom-up approach to the large-scale synthesis of three-dimensional (3D) ternary hybrid architectures constructed from graphene, MoS2, and graphitic carbon nitride nanosheets (MoS2-CN/G) by a facile self-assembly method. Benefiting from their distinct architectural features including 3D interconnected porous networks, large specific surface areas, ultrathin walls, and low charge-transfer resistance, the as-prepared MoS2-CN/G catalysts exhibit superior hydrogen evolution reaction (HER) performance with a low onset potential of 140 mV, a small Tafel slope of 79 mV dec–1, and reliable long-term durability, markedly outperforming those of bare graphene, MoS2, and graphitic carbon nitride catalysts. DFT calculations further reveal an optimized band structure and numerous efficient electrocatalytic sites for the MoS2-CN/G architectures, both of which are very conducive to boosting the HER kinetics.