DOI码：

10.1002/anie.201309660

发表刊物：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

刊物所在地：

WEINHEIM

关键字：

heterogeneous catalysis; oxygen activation; palladium; plasmonics; titania

摘要：

The charge state of the Pd surface is a critical parameter in terms of the ability of Pd nanocrystals to activate O-2 to generate a species that behaves like singlet O-2 both chemically and physically. Motivated by this finding, we designed a metal-semiconductor hybrid system in which Pd nanocrystals enclosed by {100} facets are deposited on TiO2 supports. Driven by the Schottky junction, the TiO2 supports can provide electrons for metal catalysts under illumination by appropriate light. Further examination by ultrafast spectroscopy revealed that the plasmonics of Pd may force a large number of electrons to undergo reverse migration from Pd to the conduction band of TiO2 under strong illumination, thus lowering the electron density of the Pd surface as a side effect. We were therefore able to rationally tailor the charge state of the metal surface and thus modulate the function of Pd nanocrystals in O-2 activation and organic oxidation reactions by simply altering the intensity of light shed on Pd-TiO2 hybrid structures.

合写作者：

Long, Ran, Mao, Keke, Gong, Ming, Zhou, Shan, Hu, Jiahua, Zhi, Min, You, Yang, Bai, Song, Jiang, Jun, Zhang, Qun, Wu, Xiaojun, Xiong, Yujie

第一作者：

Long, Ran

通讯作者：

Zhang, Q, Xiong, YJ

论文编号：

WOS:000332747700029

文献类型：

Article

卷号：

53

期号：

12

页面范围：

3205-3209

ISSN号：

1433-7851

是否译文：

否