Design and synthesis of model and practical palladium catalysts using atomic layer deposition
| Autor: | Mar Piernavieja-Hermida, Zheng Lu, Yu Lei, Jeffrey T. Miller, Jeffrey W. Elam, Orhan Kizilkaya, A. Jeremy Kropf, Richard L. Kurtz |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Absorption spectroscopy chemistry.chemical_element Nanotechnology 02 engineering and technology Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Synchrotron 0104 chemical sciences law.invention Characterization (materials science) Atomic layer deposition Chemical engineering X-ray photoelectron spectroscopy chemistry law 0210 nano-technology Palladium |
| Zdroj: | Catalysis Science & Technology. 6:6845-6852 |
| ISSN: | 2044-4761 2044-4753 |
| Popis: | We investigated the “one-batch” synthesis of model and practical palladium catalysts using atomic layer deposition (ALD). Two types of model catalysts and one type of powder-based nanocatalyst were synthesized simultaneously by ALD under viscous flow conditions. In addition, Pd/TiO2(110) model catalysts were prepared by the identical ALD process but under ultrahigh vacuum conditions. Because of the self-limiting surface reaction that defines ALD, the local structure of all the Pd catalysts were essentially the same as confirmed by a suite of microscopic and spectroscopic characterization techniques. A comprehensive understanding of the Pd-based catalysts was achieved by applying both surface science probes and advanced synchrotron techniques, and by strategically selecting the catalyst substrate best suited for each characterization. Both X-ray absorption spectroscopy and X-ray resonant photoelectron spectroscopy suggested that Pd only weakly interacted with the TiO2 support. The one-batch synthesis approach facilitated by ALD can potentially bridge the “synthesis gap” between model catalysts and practical catalysts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|