Photoinduced Strong Metal-Support Interaction for Enhanced Catalysis

被引：130

作者：

Chen, Hao ^{[1
]}

Yang, Zhenzhen ^{[2
]}

Wang, Xiang ^{[2
]}

Polo-Garzon, Felipe ^{[2
]}

Halstenberg, Phillip W. ^{[1
]}

Wang, Tao ^{[1
]}

Suo, Xian ^{[1
]}

Yang, Shi-Ze ^{[3
]}

Meyer, Harry M., III ^{[2
]}

Wu, Zili ^{[2
]}

Dai, Sheng ^{[1
,2
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

[3] Arizona State Univ, Eyring Mat Ctr, Tempe, AZ 85287 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2021年 / 143卷 / 23期

关键词：

GOLD NANOPARTICLES; PD CATALYSTS; TIO2; SURFACE; HYDROGENATION; OXIDATION; CO; OXYGEN; LAYER; SPECTROSCOPY;

D O I：

10.1021/jacs.0c12817

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Strong metal-support interaction (SMSI) construction is a pivotal strategy to afford thermally robust nanocatalysts in industrial catalysis, but thermally induced reactions (>300 degrees C) in specific gaseous atmospheres are generally required in traditional procedures. In this work, a photochemistry-driven methodology was demonstrated for SMSI construction under ambient conditions. Encapsulation of Pd nanoparticles with a TiOx overlayer, the presence of Ti3+ species, and suppression of CO adsorption were achieved upon UV irradiation. The key lies in the generation of separated photoinduced reductive electrons (e(-)) and oxidative holes (h(+)), which subsequently trigger the formation of Ti3+ species/oxygen vacancies (O-v) and then interfacial Pd-O-v-Ti3+ sites, affording a Pd/TiO2 SMSI with enhanced catalytic hydrogenation efficiency. The as-constructed SMSI layer was reversible, and the photodriven procedure could be extended to Pd/ZnO and Pt/TiO2.

引用

收藏

页码：8521 / 8526

页数：6

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