Dual‐Modified Hollow Spherical Shell MoS₂@TiO₂/TiN Composites for Photocatalytic Hydrogen Production

Abstract

Coupling suitable cocatalysts is an effective strategy to improve the performance of photocatalytic hydrogen production. Herein, we constructed a dual-cocatalystmodified TiO 2 -based photocatalyst with a hollow-spherical-shell structure. Both the MoS 2 nanosheets and the TiN particles are in intimate contact with the TiO 2 , resulting in multiple interfaces and junctions. According to experimental results and the band structure, the photogenerated electrons transfer from TiO 2 to MoS 2 or TiN through the multiple interfaces. The MoS 2 and TiN together enhance the photocatalytic performance of TiO 2 . The hydrogen evolution rate of MoS 2 @TiO 2 / TiN (MTT) reaches 128.77 μmol g À1 h À1 , which is 4.18 times higher than that of pristine TiO 2 (30.81 μmol g À1 h À1 ). The performance improvement of composites is attributed to more catalytically active sites, stronger light absorption, and better electron-hole separation effects. This work aims to provide a strategy for the rational design of catalysts for further development in both mechanism understanding and practical application.

Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

“…The continuous consumption of fossil energy not only leads to the depletion of energy, but also causes serious pollution to the environment, and brings adverse effects on social development and people's lives. [1][2][3][4] Therefore, it is the goal of mankind all over the world to develop efficient, clean and economical energy sources, [5] and it is of great significance to achieve carbon peak and carbon neutralization. Hydrogen energy is considered as one of the ideal clean energy sources to replace fossil fuels due to its high energy density, renewability, and environment friendly.…”