Charge Carrier Dynamics of Photoexcited Co3O4 in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments

被引：36
作者：
Baker, L. Robert [1 ]
Jiang, Chang-Ming [1 ]
Kelly, Stephen T. [4 ]
Lucas, J. Matthew [2 ]
Vura-Weis, Josh [1 ]
Gilles, Mary K. [4 ]
Alivisatos, A. Paul [1 ,5 ]
Leone, Stephen R. [1 ,3 ,4 ]
机构：
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
来源：
NANO LETTERS | 2014年 / 14卷 / 10期
关键词：
High harmonic generation; transient absorption spectroscopy; surface states; interfacial charge transfer; photocatalysis; ligand-to-metal charge transfer; PHOTOCATALYTIC WATER OXIDATION; X-RAY-ABSORPTION; METAL-OXIDES; ULTRAFAST ELECTRON; COBALT OXIDE; NANOCRYSTALLINE TIO2; OXYGEN EVOLUTION; REDOX REACTIONS; ENERGY-TRANSFER; INTERFACE;
D O I：
10.1021/nl502817a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Charge carrier dynamics in Co3O4 thin films are observed using high harmonic generation transient absorption spectroscopy at the Co M-2,M-3 edge. Results reveal that photoexcited Co3O4 decays to the ground state in 600 +/- 40 ps in liquid methanol compared to 1.9 +/- 0.3 ns in vacuum. Kinetic analysis suggests that surface-mediated relaxation of photoexcited Co3O4 may be the result of hole transfer from Co3O4 followed by carrier recombination at the Co(3)O(4)methanol interface.
引用
收藏
页码：5883 / 5890
页数：8
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