| Autor: |
McCullough, Katherine E., Peczak, Ian L., Kennedy, Robert M., Wang, Yi-Yu, Lin, James, Wu, Xun, Paterson, Alexander L., Perras, Frédéric A., Hall, Jacklyn, Kropf, A. Jeremy, Hackler, Ryan A., Shin, Youngho, Niklas, Jens, Poluektov, Oleg G., Wen, Jianguo, Huang, Wenyu, Sadow, Aaron D., Poeppelmeier, Kenneth R., Delferro, Massimiliano, Ferrandon, Magali S. |
| Zdroj: |
Journal of Materials Chemistry A; 1/21/2023, Vol. 11 Issue 3, p1216-1231, 16p |
| Abstrakt: |
Pt/SrTiO3 (Pt/STO), prepared on small scale by atomic layer deposition (ALD), is a capable heterogeneous catalyst for the selective hydrogenolysis of polyolefins to hydrocarbon oils, providing a promising approach for upcycling plastic waste. However, because deposition by ALD is costly and resource-intensive, a new synthesis of Pt/STO is needed to effectively scale catalyst production and pursue the commercialization of upcycling processes. To that effect, this work details a scalable deposition method for Pt/STO made by surface organometallic chemistry (SOMC) techniques using Pt(II) acetylacetonate or and trimethyl(methylcyclopentadienyl)platinum. The STO support was calcined (550 °C), treated with ozone (200 °C), and finally steamed (200 °C) to afford a clean STO surface populated with only hydroxyl groups. Pt precursors were dissolved in toluene and deposited onto STO. After reduction at 300 °C, the STO support was decorated with 1.0–1.5 nm Pt nanoparticles. The size and loading of these nanoparticles were varied by employing a multi-cycle deposition and oxidation and/or reduction process designed to ALD techniques. These Pt/STO catalysts hydrogenolyzed isotactic polypropylene into liquid products (>95% yield) with average molecular weights of 200–300 Da (∼25 carbon atoms) and narrow size distributions at 300 °C and 180 psi H2. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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