Generation and Stabilization of Small Platinum Clusters Pt12±x Inside a Metal−Organic Framework
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F19%3APU133499" target="_blank" >RIV/00216305:26620/19:PU133499 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/abs/10.1021/jacs.9b07083" target="_blank" >https://pubs.acs.org/doi/abs/10.1021/jacs.9b07083</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/jacs.9b07083" target="_blank" >10.1021/jacs.9b07083</a>
Alternative languages
Result language
angličtina
Original language name
Generation and Stabilization of Small Platinum Clusters Pt12±x Inside a Metal−Organic Framework
Original language description
The generation and matrix stabilization of ligand-free, small platinum nanoclusters (NCs) Pt12±x is presented. The metal–organic framework-template approach is based on encapsulating CO-ligated, atom-precise Pt9 Chini clusters [{Pt3(CO)6}3]2– into the zeolitic imidazolate framework ZIF-8. The selective formation of the air-stable inclusion compound [NBu4]2[{Pt3(CO)6}4]@ZIF-8 of defined atomicity Pt12 and with Pt loadings of 1–20 wt % was monitored by UV/vis and IR spectroscopy and was confirmed by high-resolution transmission electron microscopy (HR-TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray photoelectron spectroscopy (XPS), and powder X-ray diffraction (PXRD). Thermally induced decarbonylation at 200 °C yields the composite material Ptn@ZIF-8 with a cluster atomicity n close to 12, irrespective of the Pt loading. The PtNCs retain their size even during annealing at 300 °C for 24 h and during catalytic hydrogenation of 1-hexene at 25 °C in the liquid phase. The Ptn@ZIF-8 material can conveniently be used for storing small PtNCs and their further processing. Removal of the protective ZIF-8 matrix under acidic conditions and transfer of the PtNCs to carbon substrates yields defined aggregation to small Pt nanoparticles (1.14 ± 0.35 nm, HR-TEM), which have previously shown exceptional performance in the electrocatalytic oxygen reduction reaction (ORR).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21001 - Nano-materials (production and properties)
Result continuities
Project
<a href="/en/project/LM2015041" target="_blank" >LM2015041: CEITEC Nano</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN
0002-7863
e-ISSN
1520-5126
Volume of the periodical
141
Issue of the periodical within the volume
35
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
13962-13969
UT code for WoS article
000484828900039
EID of the result in the Scopus database
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