2025
ACL
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A.B.Kuriganova, N.V.Smirnova, A.N.Yatsenko, M.V.Gorshenkov, N.G.Leontyev, M.Allix, A.Rakhmatullin, I.N.Leontyev, 'Basic features of Pt/C catalysts synthesis by non-isothermal decomposition of platinum acetylacetonate', Nanoscale - --- (2025) doi:10.1039/d5nr01487e
Pt nanoparticles supported onto carbon black were synthesized via non-isothermal decomposition of platinum acetylacetonate. The Pt loading of Pt/C exhibited variation within the range of 10-25%. Based on the refinement of X-ray patterns by the Rietveld method, it was shown that the average size of Pt nanocrystallites in the range of 1.4-2.0 nm increases with increasing Pt loading. The paper presents a synthesis mechanism describing the observed dependence. In addition, it was found that for the synthesized Pt nanoparticles, the unit cell parameter increases as the average size of Pt nanoparticles decreases. Such an effect has not been observed for platinum nanoparticles before. The reason for the observed increase in the unit cell perimeter of Pt nanoparticles is the dominance of the vacancy mechanism over the surface relaxation mechanism. Finally, the paper presents for the first time a method for refining X-ray patterns of Pt/C materials taking into account the contribution of the carbon support, which allows for an accurate analysis of the treatment of X-ray patterns of Pt/C materials with a low content of the metallic component.
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