Single Pd Atoms on θ-Al₂O₃ (010) Surface do not Catalyze NO Oxidation.

ABSTRACT: New convenient wet-chemistry synthetic routes have made it possible to explore catalytic activities of a variety of single supported atoms, however, the single supported atoms on inert substrates (e.g. alumina) are limited to adatoms and cations of Pt, Pd, and Ru. Previously, we have found that single supported Pt atoms are remarkable NO oxidation catalysts. In contrast, we report that Pd single atoms are completely inactive for NO oxidation. The diffuse reflectance infra-red spectroscopy (DRIFTS) results show the absence of nitrate formation on catalyst. To explain these results, we explored modified Langmuir-Hinshelwood type pathways that have been proposed for oxidation reactions on single supported atom. In the first pathway, we find that there is energy barrier for the release of NO

SUBMITTER: Narula CK 

PROVIDER: S-EPMC5428677 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature