Correlation between the electronic/local structure and CO-oxidation activity of Pd _x Ru_1-x alloy nanoparticles.

ABSTRACT: Pd _x Ru_1-x nanoparticles (NPs) were observed to display enhanced CO oxidation activity with the maximum performance obtained at the composition x = 0.5. To unveil the origin of this superior CO oxidation activity, we investigated the local structure, valence state, and electronic properties of Pd _x Ru_1-x NPs using synchrotron-based X-ray techniques. Site specific information obtained from X-ray absorption fine structure (XAFS) spectroscopy revealed that the local disorder around Pd and Ru atoms and their valence state can be systematically tuned by varying the Pd composition. Furthermore, the XAFS results indicated a strong correlation among the structural and valence state and the observed CO oxidation catalyti

SUBMITTER: Song C 

PROVIDER: S-EPMC9473174 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature