Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

Abstract With a large specific surface area and remarkable electrochemical capabilities, NiAl‐LDH is widely used in photocatalysis. The electrochemical performance of NiAl‐LDH can be further improved by introducing the appropriate amount of Ti₃C₂ MXene by hydrothermal method. And NiAl‐LDH@Ti₃C₂ is simply compounded with ZnCdS in a certain ratio to obtain ZnCdS/NiAl‐LDH@Ti₃C₂. By studying different ratios of ZCSNAT, the optimal ratio of hydrogen evolution activity is 27.10 mmol g⁻¹ h⁻¹ under alkaline solution, which is 9.96 and 1.67 times higher than ZCS and ZnCdS/NiAl‐LDH‐20, while ZnCdS/NiAl‐LDH@Ti₃C₂‐20 reaches 1883 µmol (37.66 mmol g⁻¹ h⁻¹) in acidic solution, 13.84 and 2.32 times higher than ZnCdS and ZnCdS/NiAl‐LDH‐20. This apparent enhancement is mainly due to the doping of Ti₃C₂ in the NiAl‐LDH preparation to achieve improved electrochemical properties of NiAl‐LDH. The better electron induction effect of NiAl‐LDH@Ti₃C₂ greatly improves the electron mobility to the NA surface, which results in a higher photogenerated electron–hole separation efficiency of the composite catalyst based on the original one.