燃料化学学报（中英文）2026，Vol.54Issue(1)：1-19,19.DOI:10.1016/S1872-5813(25)60597-4
CdS-CuO异质结的S型传输机制增强光催化析氢效率
S-scheme unidirectional transmission of CdS-CuO heterojunction benefits for superior photocatalytic hydrogen evolution efficiency
赵海庭 1烟征 1刘阳 1姜龙德 1栾敬德1
作者信息
- 1. 沈阳航空航天大学能源与环境学院,辽宁沈阳 110134
- 折叠
摘要
Abstract
The efficiency and stability of catalysts for photocatalytic hydrogen evolution(PHE)are largely governed by the charge transfer behaviors across the heterojunction interfaces.In this study,CuO,a typical semiconductor featuring a broad spectral absorption range,is successfully employed as the electron acceptor to combine with CdS for constructing a S-scheme heterojunction.The optimized photocatalyst(CdS-CuO2∶1)delivers an exceptional hydrogen evolution rate of 18.89 mmol/(g·h),4.15-fold higher compared with bare CdS.X-ray photoelectron spectroscopy(XPS)and ultraviolet-visible diffuse reflection absorption spectroscopy(UV-vis DRS)confirmed the S-scheme band structure of the composites.Moreover,the surface photovoltage(SPV)and electron paramagnetic resonance(EPR)indicated that the photogenerated electrons and photogenerated holes of CdS-CuO2∶1 were respectively transferred to the conduction band(CB)of CdS with a higher reduction potential and the valence band(VB)of CuO with a higher oxidation potential under illumination,as expected for the S-scheme mechanism.Density-functional-theory calculations of the electron density difference(EDD)disclose an interfacial electric field oriented from CdS to CuO.This built-in field suppresses charge recombination and accelerates carrier migration,rationalizing the markedly enhanced PHE activity.This study offers a novel strategy for designing S-scheme heterojunctions with high light harvesting and charge utilization toward sustainable solar-to-hydrogen conversion.关键词
光催化析氢/CdS-CuO s型异质结/电子定向传输/界面电场/DFT计算Key words
photocatalytic hydrogen evolution/CdS-CuO S-scheme heterojunction/electron directional transmission/interfacial electric field/DFT calculation分类
能源科技引用本文复制引用
赵海庭,烟征,刘阳,姜龙德,栾敬德..CdS-CuO异质结的S型传输机制增强光催化析氢效率[J].燃料化学学报（中英文）,2026,54(1):1-19,19.
