| Autor: |
Harzandi AM, Tiwari JN, Lee HS, Jeon H, Cho WJ, Lee G, Baik J; Pohang Accelerator Laboratory, Pohang University of Science and Technology , Pohang 37673, Korea., Kwak JH, Kim KS |
| Jazyk: |
angličtina |
| Zdroj: |
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2017 Jan 25; Vol. 9 (3), pp. 2495-2499. Date of Electronic Publication: 2017 Jan 10. |
| DOI: |
10.1021/acsami.6b13843 |
| Abstrakt: |
As carbon monoxide oxidation is widely used for various chemical processes (such as methanol synthesis and water-gas shift reactions H 2 O + CO ⇄ CO 2 + H 2 ) as well as in industry, it is essential to develop highly energy efficient, inexpensive, and eco-friendly catalysts for CO oxidation. Here we report green synthesis of ∼10 nm sized CuO nanoparticles (NPs) aggregated on ∼400 nm sized 50-facet Cu 2 O polyhedral nanocrystals. This CuO-NPs/50-facet Cu 2 O shows remarkable CO oxidation reactivity with very high specific CO oxidation activity (4.5 μmol CO m -2 s -1 at 130 °C) and near-complete 99.5% CO conversion efficiency at ∼175 °C. This outstanding catalytic performance by CuO NPs over the pristine multifaceted Cu 2 O nanocrystals is attributed to the surface oxygen defects present in CuO NPs which facilitate binding of CO and O 2 on their surfaces. This new material opens up new possibilities of replacing the usage of expensive CO oxidation materials. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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