AI Article Synopsis
- The study examines how the reactivity of platinum (Pt) clusters with nitric oxide (NO) varies based on the size of the clusters, revealing significant size dependence.
- Small Pt clusters tend to form stable complexes with NO, while some larger clusters show minimal reactivity, although others can effectively decompose NO.
- The research emphasizes the importance of atomic structures and specific active sites in Pt clusters, particularly the role of cooperative dual Lewis-acid sites in enhancing NO decomposition through interactions with neighboring Pt atoms.
Article Abstract
The size dependence of metal cluster reactions frequently reveals valuable information on the mechanism of nanometal catalysis. Here, the reactivity of the Pt (n = 1-40) clusters with NO is studied and a significant dependence on the size of these clusters is noticed. Interestingly, the small Pt clusters like Pt and Pt are inclined to form NO complexes; some larger clusters, such as Pt , Pt , and Pt , appear to be unreactive; however, the others such as Pt and Pt are capable of decomposing NO. While Pt rapidly reacts with NO to form a stable quasitetrahedron PtO product, Pt experiences a series of NO decompositions to produce PtO . Utilizing high-precision theoretical calculations, it is shown how the atomic structures and active sites of Pt clusters play a vital role in determining their reactivity. Cooperative dual Lewis-acid sites (CDLAS) can be achieved on specific metal clusters like Pt , rendering accelerated NO decomposition via both N- and O-bonding on the neighboring Pt atoms. The influence of CDLAS on the size-dependent reaction of Pt clusters with NO is illustrated, offering insights into cluster catalysis in reactions that include the donation of electron pairs.
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| http://dx.doi.org/10.1002/smll.202404638 | DOI Listing |
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