In:
Small, Wiley, Vol. 19, No. 24 ( 2023-06)
Abstract:
Regulating electronic structures of the active site by manipulating the local coordination is one of the advantageous means to improve photocatalytic hydrogen evolution (PHE) kinetics. Herein, the ZnIn 2 S 4 /Mo 2 TiC 2 Schottky junctions are designed to be constructed through the interfacial local coordination of In 3+ with the electronegative O terminal group on Mo 2 TiC 2 based on the different work functions. Kelvin probe force microscopy and charge density difference reveal that an electronic unidirectional transport channel across the Schottky interface from ZnIn 2 S 4 to Mo 2 TiC 2 is established by the formed local nucleophilic/electrophilic region. The increased local electron density of Mo 2 TiC 2 inhibits the backflow of electrons, boosts the charge transfer and separation, and optimizes the hydrogen adsorption energy. Therefore, the ZnIn 2 S 4 /Mo 2 TiC 2 photocatalyst exhibits a superior PHE rate of 3.12 mmol g −1 h −1 under visible light, reaching 3.03 times that of the pristine ZnIn 2 S 4 . This work provides some insights and inspiration for preparing MXene‐based Schottky catalysts to accelerate PHE kinetics.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202300717
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2168935-0