Designing Efficient Catalysts through Bimetallic Architecture: Rh@Pt Nanocubes as a Case Study
| Autor: | Dale W. Harak, Paul Patton, Ethan W. Harak, Sara E. Skrabalak, Kallum M. Koczkur |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element Nanotechnology 02 engineering and technology Sabatier principle 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nanomaterial-based catalyst 0104 chemical sciences Nanomaterials Catalysis Rhodium Biomaterials chemistry Nanocrystal Materials Chemistry 0210 nano-technology Platinum Bimetallic strip |
| Zdroj: | ChemNanoMat. 3:815-821 |
| ISSN: | 2199-692X |
| DOI: | 10.1002/cnma.201700167 |
| Popis: | Bimetallic nanocatalysts often have increased activities and stabilities over their monometallic counterparts due to surface strain effects and electron transfer between the two metals. Here, we demonstrate that the performance of a nanocatalyst can be precisely manipulated in shape-controlled nanocrystals through a bimetallic core@shell architecture. This ability is achieved in a model core@shell Rh@Pt nanocube system through control of shell thickness. The enhanced performance with thin-shelled nanocrystals is correlated with the weakening of surface–adsorbate interactions. In these thin-shelled Rh@Pt nanocubes, the maximum current density achieved during formic acid oxidation was over 2 times greater than that achieved with similarly sized Pt nanocubes, with a decreased CO poisoning ratio as well. The strategy employed here should also enhance the performance of many other bimetallic nanomaterials composed of more cost-effective metals too. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text