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DOE OSTI · 1805012

Photoinduced Strong Metal–Support Interaction for Enhanced Catalysis

Chen, Hao·Yang, Zhenzhen·Wang, Xiang·Polo-Garzon, Felipe·Halstenberg, Phillip W.·Wang, Tao·Suo, Xian·Yang, Shi-Ze·Meyer, Harry M.·Wu, Zili·Dai, Sheng
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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 TiO x overlayer, the presence of Ti 3+ 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 Ti 3+ species/oxygen vacancies (Ov) and then interfacial Pd–Ov–Ti 3+ sites, affording a Pd/TiO 2 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/TiO 2 .

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Chen, Hao, Yang, Zhenzhen, Wang, Xiang, Polo-Garzon, Felipe, Halstenberg, Phillip W., Wang, Tao, Suo, Xian, Yang, Shi-Ze, Meyer, Harry M., Wu, Zili, Dai, Sheng. 2021-06-03. Photoinduced Strong Metal–Support Interaction for Enhanced Catalysis. https://doi.org/10.1021/jacs.0c12817

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