Photoinduced Strong Metal–Support Interaction for Enhanced Catalysis
| Autor: | Sheng Dai, Felipe Polo-Garzon, Xiang Wang, Phillip Halstenberg, Xian Suo, Tao Wang, Harry M. Meyer, Shize Yang, Zili Wu, Zhenzhen Yang, Hao Chen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_element
General Chemistry Electron 010402 general chemistry Photochemistry 01 natural sciences Biochemistry Oxygen Catalysis Nanomaterial-based catalyst 0104 chemical sciences Overlayer Metal Colloid and Surface Chemistry Adsorption chemistry visual_art visual_art.visual_art_medium Irradiation |
| Zdroj: | Journal of the American Chemical Society. 143:8521-8526 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.0c12817 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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