Synthesis of Pt Nanoparticles Enveloped with Flexible Zeolitic Imidazolate Framework

Doko, Yuki; Kobayashi, Hirokazu; Kusada, Kohei; Kitagawa, Hiroshi

doi:10.1246/cl.200326

Cited by 1 publication

(1 citation statement)

References 19 publications

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“…In practice, however, the first one is mostly applied due to the lower costs of equipment and easy implementation. PtNPs are usually synthesized by chemical reduction of Pt(IV) 11 or Pt(II) 12 salts with sodium borohydrides 13 , iron(II) 14 , ethanol 15 , 16 , N-heterocyclic thiones 17 , plants aqueous extractsor 18 , other reductants 19 , in the presence of sodium citrate 20 or other stabilizing agent 20 . The common way is carrying out the synthesis in batch reactor.…”

Section: Introductionmentioning

confidence: 99%

The influence of dielectric permittivity of water on the shape of PtNPs synthesized in high-pressure high-temperature microwave reactor

Wojnicki

Luty–Błocho

Kwolek

et al. 2021

Sci Rep

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In this paper, a novel method for the synthesis of Pt nanoparticles (PtNPs) using a microwave autoclave reactor is proposed. For benchmarking, the obtained results are compared with the traditional, batch method. A novel process window is proposed, which is the application of high-temperature and high-pressure. The main finding is that this only brings advantage, when the ionic strength of the system is enough low. It is explained, that at high pressure and high temperature, water behaves like only a slightly polar solvent, approaching a subcritical state. This reduces the electrostatic stabilization of the particles. Moreover, a change in the Pt particle shape is observed under high pressure and temperature conditions, suggesting that additional physical–chemical processes are involved.

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