Particle-Size Effect in Catalytic Oxidation Over Pt Nanoparticles Full article
Source | Advanced Nanomaterials for Catalysis and Energy. Synthesis, Characterization and Applications Monography, Elsevier. Amsterdam, Netherlands.2019. 587 c. ISBN 9780128148075. Scopus Scopus РИНЦ |
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Output data | Year: 2019, Number: 8, Pages: 295-320 Pages count : 26 DOI: 10.1016/B978-0-12-814807-5.00008-5 | ||||
Tags | Pt nanoparticles; Oxidation; Size effect; Catalytic activity; Turnover frequency (TOF); Structure sensitivity; Oxygen adsorption; PtOx formation | ||||
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Abstract:
Relationships between turnover frequency and the size of supported Pt clusters are discussed for oxidation of hydrocarbons, CO, and NO by molecular oxygen. Analysis of the experimental data indicates that TOF tends to increase for bigger platinum particles. This tendency is particularly pronounced for the nanoparticles smaller than 4–5 nm. According to the most realistic models, the observed tendency stems from the deactivation of edge, corner, and neighboring atoms by two processes: (1) strong oxygen adsorption on edge and corner atoms with high degree of coordinative unsaturation, and (2) oxidation of Pt to PtOx, which is facilitated over undercoordinated sites. As the metal clusters grow in size, the fraction of undercoordinated edge and corner atoms decreases leading to the increase in experimentally observed TOF.
Cite:
Stakheev A.Y.
, Bokarev D.A.
, Prosvirin I.P.
, Bukhtiyarov V.I.
Particle-Size Effect in Catalytic Oxidation Over Pt Nanoparticles
Monography chapter Advanced Nanomaterials for Catalysis and Energy. Synthesis, Characterization and Applications. – Elsevier., 2019. – C.295-320. – ISBN 9780128148075. DOI: 10.1016/B978-0-12-814807-5.00008-5 Scopus РИНЦ
Particle-Size Effect in Catalytic Oxidation Over Pt Nanoparticles
Monography chapter Advanced Nanomaterials for Catalysis and Energy. Synthesis, Characterization and Applications. – Elsevier., 2019. – C.295-320. – ISBN 9780128148075. DOI: 10.1016/B978-0-12-814807-5.00008-5 Scopus РИНЦ
Dates:
Published online: | Sep 28, 2018 |
Published print: | Jan 1, 2019 |
Identifiers:
Scopus | 2-s2.0-85075938257 |
Elibrary | 43209900 |
Chemical Abstracts | 2020:160845 |
OpenAlex | W2892600511 |