Reactivity and Passivation of Fe Nanoclusters on h‐BN/Rh(111). Issue 68 (2nd September 2021)

• Record Type: Journal Article
• Authors: Waleska, Natalie J.; Düll, Fabian; Bachmann, Philipp; Hemauer, Felix; Steinhauer, Johann; Papp, Christian
• Is Part Of: Chemistry. Volume 27:Issue 68(2021)
• Page Start: 17087
• Page End: 17093
• Publication Date: 2021-09-02
• Subjects: heterogeneous catalysis -- iron -- model catalysis -- nanocluster array -- XPS; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202102590
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: The reactivity of iron nanocluster arrays on h‐ BN/Rh(111) was studied using in situ high‐resolution X‐ray photoelectron spectroscopy. The morphology and reactivity of the iron nanoclusters (Fe‐NCs) were investigated by CO adsorption. On‐top and hollow/edge sites were determined to be the available adsorption sites on the as‐prepared Fe‐NCs and CO dissociation was observed at 300 K. C‐ and O‐precovered Fe‐NCs showed no catalytic activity towards CO dissociation because the hollow/edge sites were blocked by the C and O atoms. Therefore, these adsorption sites were identified to be the most active sites of the Fe‐NCs. Abstract : The reactivity of iron nanoclusters (Fe‐NCs) on h ‐BN/Rh(111) was investigated using in situ high‐resolution X‐ray photoelectron spectroscopy and CO as a probe molecule. The hollow/edge sites were determined to be the most active sites of the clusters. Dissociation of CO was only observed on the as‐prepared Fe‐NCs, while no catalytic activity towards CO dissociation was found for the precovered clusters as a result of blocking of the most active sites by adatoms.