Integration of 2D layered CdS/WO_(3) S-scheme heterojunctions and metallic Ti_(3)C_(2) MXene-based Ohmic junctions for effective photocatalytic H_(2) generation

作     者：Junxian Bai Rongchen Shen Zhimin Jiang Peng Zhang Youji Li Xin Li 白浚贤;沈荣晨;姜志民;张鹏;李佑稷;李鑫

作者机构：Institute of Biomass EngineeringKey Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642GuangdongChina State Centre for International Cooperation on Designer Low‐Carbon&Environmental Materials(CDLCEM)School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina College of Chemistry and Chemical EngineeringJishou UniversityJishou 416000HunanChina 

基　　金：国家自然科学基金(21975084,51672089) 华南农业大学丁颖人才计划 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2022年第43卷第2期

页      码：359-369页

摘      要：The rapid recombination of photo-generated electron-hole pairs,insufficient active sites,and strong photocorrosion have considerably restricted the practical application of Cd S in photocatalytic ***,we designed and constructed a 2D/2D/2D layered heterojunction photocatalyst with cascaded 2D coupling *** using electron spin resonance spectroscopy,ultraviolet photoelectron spectroscopy,and in-situ irradiation X-ray photoelectron spectroscopy were conducted to confirm the 2D layered CdS/WO_(3) step-scheme(S-scheme)heterojunctions and CdS/MX ohmic ***,it was found that the strong interfacial electric fields in the S-scheme heterojunction photocatalysts could effectively promote spatially directional charge separation and transport between CdS and WO_(3) *** addition,2D Ti_(3)C_(2) MXene nanosheets with a smaller work function and excellent metal conductivity when used as a co-catalyst could build ohmic junctions with Cd S nanosheets,thus providing a greater number of electron transfer pathways and hydrogen evolution *** showed that the highest visible-light hydrogen evolution rate of the optimized MX-Cd S/WO_(3) layered multi-heterostructures could reach as high as 27.5 mmol/g/h,which was 11.0 times higher than that of pure CdS ***,the apparent quantum efficiency reached 12.0% at 450 *** is hoped that this study offers a reliable approach for developing multifunctional photocatalysts by integrating S-scheme and ohmic-junction built-in electric fields and rationally designing a 2D/2D interface for efficient light-to-hydrogen fuel production.

主 题 词：Photocatalytic hydrogen evolution 2D layered S-scheme heterojunction CdS nanosheets WO_(3)nanosheets Ti_(3)C_(2)MXene-based ohmic junctions Cascade 2D coupling interfaces 

学科分类：081702[081702] 081704[081704] 081705[081705] 07[理学] 0817[工学-轻工类] 08[工学] 070304[070304] 0703[理学-化学类] 

核心收录：

D　O　I：10.1016/S1872-2067(21)63883-4

馆 藏 号：203107137...