1. Single-Atom Alloy Pd 1 Ag 10 /CeO 2 –ZrO 2 as a Promising Catalyst for Selective Alkyne Hydrogenation.
- Author
-
Markov, Pavel V., Bragina, Galina O., Smirnova, Nadezhda S., Baeva, Galina N., Mashkovsky, Igor S., Gerasimov, Evgeny Y., Bukhtiyarov, Andrey V., Zubavichus, Yan. V., and Stakheev, Alexander Y.
- Subjects
- *
HYDROGENATION , *CATALYSTS , *STRUCTURAL stability , *SURFACE structure , *DIPHENYLACETYLENE - Abstract
The effect of support on the performance of Pd1Ag10/Al2O3 and Pd1Ag10/CeO2–ZrO2 catalysts in the selective hydrogenation of diphenylacetylene (DPA) was studied. Characterization of the catalyst by DRIFTS-CO and HRTEM revealed the formation of a PdAg single-atom alloy (SAA) structure on the surface of PdAg nanoparticles, with Pd1 sites isolated by Ag atoms. It was found that the use of CeO2–ZrO2 as a carrier makes it possible to increase the activity of the Pd1Ag10 catalyst by a factor of three without loss of selectivity compared to the reference Pd1Ag10/Al2O3. According to the HRTEM data, this catalytic behavior can be explained by an increase in the dispersion of Pd1Ag10/CeO2–ZrO2 compared to its Pd1Ag10/Al2O3 counterpart. As evidenced by DRIFTS-CO data, the high selectivity of the Pd1Ag10/CeO2–ZrO2 sample presumably stems from the stability of the structure of isolated Pd1 sites on the surface of SAA Pd1Ag10/CeO2–ZrO2. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF