Bimetallic synergy in cobalt–palladium nanocatalysts for CO oxidation

Study on the CO Oxidation over Ceria-Based Nanocatalysts.

A series of ceria nanocatalysts have been prepared to study the structure dependency of the CO oxidation reaction. The ceria samples with well-defined nanostructures (nanocubes/Ce-NC and nanorods/Ce-NR) have been prepared using the hydrothermal method. Mesoporous ceria (Ce-MES) and ceria synthesized with solution combustion technique (Ce-SCS) have also been prepared for comparison. The lowest C...

Themed issue: Bimetallic nanocatalysts and nanocatalysis

CO Oxidation at the Au − Cu Interface of Bimetallic Nanoclusters

DFT+U calculations of the structure of CeO2(111)-supported Aubased bimetallic nanoclusters (NCs) show that a strong support−metal interaction induces a preferential segregation of the more reactive element to the NC−CeO2 perimeter, generating an interface with the Au component. We studied several Au -based bimetallic NCs (Au-X, X: Ag, Cu, Pd, Pt, Rh, and Ru) and found that (Au− Cu)/CeO2 is opti...

CO oxidation catalysed by Pd-based bimetallic nanoalloys.

Density functional theory based global geometry optimization has been used to demonstrate the crucial influence of the geometry of the catalytic cluster on the energy barriers for the CO oxidation reaction over Pd-based bimetallic nanoalloys. We show that dramatic geometry change between the reaction intermediates can lead to very high energy barriers and thus be prohibitive for the whole proce...

Oxidation state and symmetry of magnesia-supported Pd13O(x) nanocatalysts influence activation barriers of CO oxidation.

Combining temperature-programmed reaction measurements, isotopic labeling experiments, and first-principles spin density functional theory, the dependence of the reaction temperature of catalyzed carbon monoxide oxidation on the oxidation state of Pd(13) clusters deposited on MgO surfaces grown on Mo(100) is explored. It is shown that molecular oxygen dissociates easily on the supported Pd(13) ...