Reverse Spillover Dominating CO Adsorption on Single Cobalt Atoms in Graphene Divacancies.

ABSTRACT: The kinetics of molecular adsorption and desorption can unveil the details of the adsorption potential that impact, for instance, the overall sticking probability. This information is of particular importance for catalysis and gas sensing. We investigate the room-temperature CO adsorption on a model single-atom catalyst consisting of single Co atoms trapped in graphene (Gr) double carbon vacancies during Gr growth by chemical vapor deposition (CVD) on Ni(111). The study is conducted by combining a thermal desorption spectroscopy (TDS) instrument that allows the study of systems with a very low surface density of active sites, of the order of 10^-3 monolayers (MLs) with variable-temperature scanning tunneling microscopy (VT-STM). Our findings show that CO adsorption onto the singl

SUBMITTER: Armillotta F 

PROVIDER: S-EPMC11912467 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature