| Autor: |
Chen H; Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States., Yang Z; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Wang X; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Polo-Garzon F; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Halstenberg PW; Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States., Wang T; Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States., Suo X; Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States., Yang SZ; Eyring Materials Center, Arizona State University, Tempe, Arizona 85287, United States., Meyer HM 3rd; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Wu Z; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Dai S; Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States.; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States. |
| Abstrakt: |
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 (O v ) and then interfacial Pd-O v -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 . |
