Near Bandgap Excitation Inhibits the Interfacial Electron Transfer of Semiconductor/Cocatalyst

被引：27

作者：

Xue, Jiawei ^{[1
]}

Fujitsuka, Mamoru ^{[1
]}

Majima, Tetsuro ^{[1
]}

机构：

[1] Osaka Univ, Osaka, Japan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 05期

关键词：

semiconductor/cocatalyst; above/near bandgap excitation; electron trapping; interfacial electron transfer; H-2; evolution;

D O I：

10.1021/acsami.9b20247

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Understanding the ultrafast interfacial electron transfer (IET) process is essential for establishing the structure-property relationship of the semiconductor/cocatalyst system for photocatalytic H-2 evolution. However, the IET kinetics for the near bandgap excitation has not been reported. Herein, we investigate the IET kinetics of g-C3N4/Pt as a semiconductor/cocatalyst prototype by femtosecond time-resolved diffuse reflectance spectroscopy. We find that the near bandgap excitation of g-C3N4 inhibits the IET of g-C3N4/Pt due to electron deep trapping, resulting in a markedly decreased apparent quantum efficiency for photocatalytic H-2 evolution. This work complements the kinetic understanding for the photocatalytic mechanism of the semiconductor/cocatalyst system in its whole light absorption range.

引用

页码：5920 / 5924

页数：5

共 50 条

[21] Ultrafast interfacial electron transfer from conjugated polymers to inorganic semiconductor nanoparticles
Anderson, NA
Ai, X
Lian, TWQ
ULTRAFAST PHENOMENA XIII, 2003, 71 : 325 - 327
[22] Ultrafast interfacial electron transfer from the excited state of anchored molecules into a semiconductor
Gundlach, L.
Ernstorfer, R.
Willig, F.
PROGRESS IN SURFACE SCIENCE, 2007, 82 (4-6) : 355 - 377
[23] Ultrafast interfacial electron transfer from the excited state of anchored molecules into a semiconductor
Hahn-Meitner-Institute Berlin, Dynamics of Interfacial Reactions, Glienicker Straße 100, 14109 Berlin, Germany
Prog Surf Sci, 4-6 (355-377):
[24] Interfacial proton-coupled electron transfer in metal oxide semiconductor photocatalysis
Zhu, Qian
Duan, Ran
Ji, Hongwei
Song, Wenjing
Chen, Chuncheng
Ma, Wanhong
Zhao, Jincai
RESEARCH ON CHEMICAL INTERMEDIATES, 2017, 43 (09) : 4997 - 5009
[25] EXCITATION OF A PROBE PLACED NEAR A SEMICONDUCTOR
KINO, GS
PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, 1967, 55 (01): : 90 - &
[26] Interfacial photoinduced electron transfer dynamics in semiconductor nanocrystal-organic ligand complexes
Vasilenko, Vladislav
Morris-Cohen, Adam
Aruda, Ken
Weiss, Emily A.
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2011, 242
[27] Effect of trap states on interfacial electron transfer between molecular absorbates and semiconductor nanoparticles
Hao, EC
Anderson, NA
Asbury, JB
Lian, TQ
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (39): : 10191 - 10198
[28] INTERFACIAL ELECTRON-TRANSFER REACTIONS IN COLLOIDAL SEMICONDUCTOR DISPERSIONS - KINETIC-ANALYSIS
GRATZEL, M
FRANK, AJ
JOURNAL OF PHYSICAL CHEMISTRY, 1982, 86 (15): : 2964 - 2967
[29] Ground and excited state interfacial electronic structure of a dipolar organic semiconductor on Au (111): Insights for interfacial electron transfer
Monti, Oliver L. A.
Steele, Mary P.
Ilyas, Nahid
Kelly, Leah L.
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2011, 242
[30] HOT TRANSFER OF ELECTRON EXCITATION
KHIZHNYAKOV, VV
TEKHVER, YI
IZVESTIYA AKADEMII NAUK SSSR SERIYA FIZICHESKAYA, 1975, 39 (09): : 1895 - 1899

← 1 2 3 4 5 →