Photoinduced Strong Metal-Support Interaction for Enhanced Catalysis

Hao Chen; Zhenzhen Yang; Xiang Wang; Felipe Polo-Garzon; Phillip W. Halstenberg; Tao Wang; Xian Suo; Shi Ze Yang; Harry M. Meyer; Zili Wu; Sheng Dai

doi:10.1021/jacs.0c12817

Photoinduced Strong Metal-Support Interaction for Enhanced Catalysis

Hao Chen, Zhenzhen Yang, Xiang Wang, Felipe Polo-Garzon, Phillip W. Halstenberg, Tao Wang, Xian Suo, Shi Ze Yang, Harry M. Meyer, Zili Wu, Sheng Dai

Research output: Contribution to journal › Article › peer-review

111 Scopus citations

Abstract

Strong metal-support interaction (SMSI) construction is a pivotal strategy to afford thermally robust nanocatalysts in industrial catalysis, but thermally induced reactions (>300 °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 (Ov) and then interfacial Pd-Ov-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.

Original language	English
Pages (from-to)	8521-8526
Number of pages	6
Journal	Journal of the American Chemical Society
Volume	143
Issue number	23
DOIs	https://doi.org/10.1021/jacs.0c12817
State	Published - Jun 16 2021

Funding

The research was supported financially by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division, Catalysis Science Program. We acknowledge the use of facilities within the Eyring Materials Center at Arizona State University, supported in part by NNCI-ECCS-1542160.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences	NNCI-ECCS-1542160
Basic Energy Sciences

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title = "Photoinduced Strong Metal-Support Interaction for Enhanced Catalysis",

abstract = "Strong metal-support interaction (SMSI) construction is a pivotal strategy to afford thermally robust nanocatalysts in industrial catalysis, but thermally induced reactions (>300 °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 (Ov) and then interfacial Pd-Ov-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.",

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AU - Chen, Hao

AU - Yang, Zhenzhen

AU - Wang, Xiang

AU - Polo-Garzon, Felipe

AU - Halstenberg, Phillip W.

AU - Wang, Tao

AU - Suo, Xian

AU - Yang, Shi Ze

AU - Meyer, Harry M.

AU - Wu, Zili

AU - Dai, Sheng

PY - 2021/6/16

Y1 - 2021/6/16

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AB - Strong metal-support interaction (SMSI) construction is a pivotal strategy to afford thermally robust nanocatalysts in industrial catalysis, but thermally induced reactions (>300 °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 (Ov) and then interfacial Pd-Ov-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.

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Photoinduced Strong Metal-Support Interaction for Enhanced Catalysis

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