Hollow Nanobox‐Shaped Cu 2‐x S@Zn x Cd 1‐x S Heterojunction by Light Multireflection with Z‐Scheme Mechanism for Enhanced Photocatalytic Hydrogen Production
Year: 2024
Type: article
Abstract: Achieving efficient spatial photoinduced charge separation and light utilization for improving the high photocatalytic activity is still a major obstacle. Here, a Cu 2‐x S@Zn x Cd 1‐x S (Cu 2‐x S@ZnCdS) heterojunction is reported featuring a distinctive core–shell hollow nanobox structure. The Cu 2‐x S@Zn x Cd 1‐x S exhibits high photocatalytic activity in hydrogen evolution reaction (HER) at the rate of 8175 µmol∙g −1 ∙h −1 under visible light irradiation, outperforming pristine ZnCdS nanoparticles and Cu 2‐x S hollow nanoboxes. The remarkable activity and outstanding stability of Cu 2‐x @ZnCdS are attributed to the development of robust interfacial electric fields, and improved light multireflection absorption efficiency as well as the Z‐scheme mechanism. The electron paramagnetic resonance (EPR) and in situ X‐ray photoelectron spectroscopy (XPS) measurements gave the direct evidence of the formation of the Z‐scheme, which maintained the high redox potentials of each ZnCdS and Cu 2‐x S. This study gives the guideline for the design of heterojunction with the Z‐scheme mechanism, leading to the high photocatalytic performance and remarkable stability.
Source: Advanced Functional Materials
Authors: Lihui Wang, Han Xiao, Lei Yang, Jiaxing Li, Jiangzhi Zi, Zichao Lian
Institution: University of Shanghai for Science and Technology
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
Award: G6797410829
OpenAlex ID: W4403547404