Organometallic Pt precursor on graphite substrate: deposition from SC CO2, reduction and morphology transformation as revealed by SFM
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Organometallic Pt precursor was deposited on model highly oriented pyrolytic graphite substrate from solutions in supercritical carbon dioxide. Morphology transformations during reduction process including real-time observations were studied by scanning force microscopy (SFM). We confirmed that SC CO2 is a promising mediator in deposition process even for rather hydrophobic supports. SFM data show that thermal decomposition of the PtMe2(COD) precursor with subsequent hydrogen post-treatment allows one to obtain rather pure and well-defined Pt nanoparticles with average height above a substrate level of 4.5 ± 0.6 nm.
KeywordsPt nanoparticles Organometallic precursor Deposition from supercritical carbon dioxide Ligand decomposition Scanning force microscopy Real-time observations
This study was supported by Russian Academy of Sciences within Basic Researches Programs of the Presidium (No. 22) and the Division of Chemistry and Materials Sciences (OKh-6). Research activity of I.V.E. is supported by Federal target-oriented program “Scientific and educational research personnel of innovative Russia for 2009–2013”. The authors are grateful to Dr EE Said-Galiyev, Dr AYu Nikolaev, Dr TE Grigorev, Prof. GA Tsirlina, Dr EE Levin, Prof. AA Fedyanin, Dr TV Dolgova, Prof. BV Lokshin, Dr MG Ezernitskaya, Dr EA Nesterova for their help with experiments and fruitful discussions.
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