ORALS
SESSION:
SolidStateChemistryTueAM-R4
| Poeppelmeier International Symposium(3rd Intl Symp on Solid State Chemistry for Applications & Sustainable Development) |
| Tue. 28 Nov. 2023 / Room: Dreams 4 | |
| Session Chairs: Shiv Halasyamani; Session Monitor: TBA |
12:50: [SolidStateChemistryTueAM04] OL
EARTH-ABUNDANT METAL OXIDE NANOPARTICLES FOR HIGHLY EFFECTIVE CATALYTIC HYDROGENOLYSIS OF POLYOLEFINS Wenyu Huang1 ;
1Iowa State University, Ames, United States;
Paper Id: 276
[Abstract] From 1950 to 2015, more than 4.9 billion metric tons of new plastic materials were put into landfills or the environment. Unfortunately, this number will continue to increase due to the yearly production of over 350 million metric tons of plastic, of which 79% is quickly discarded. This plastic waste is not only a significant environmental issue but also a concern for human health. However, these wastes contain valuable amounts of energy and carbon that could be used as feedstock in the chemical industry. To combat the plastic waste crisis, there are ongoing efforts to transform these wastes into high-value chemicals through chemical upcycling. Our research has shown that earth-abundant zirconia nanoparticles can cleave the C-C bond in polyethylene to create a narrow distribution of small hydrocarbon molecules catalytically.[1] This material consists of nanoparticles of zirconia embedded in the walls of mesoporous silica, named as L-ZrO2@mSiO2. The mSiO2 coating on zirconia nanoparticles helps to stabilize the coordinatively unsaturated surface sites needed for catalysis. Our DFT calculations show that these oxides can mediate C-C bond hydrogenolysis with activity comparable to Pt/C. This is due to L-ZrO2@mSiO2 containing a combination of small crystalline ZrO2 with mSiO2, which we hypothesize to contain a large number of ZrOx defect sites that exhibit catalytic activity. A new bifunctional (hydroxy)organozirconium oxide species has been suggested for catalytic chemistry. The hydrogenolysis with L-ZrO2@mSiO2 is a previously unrecognized heterogeneous analog of the SOMC-catalyzed C-C cleavage processes.[2-4]
References:
[1] S. Chen, A. Tennakoon, K.-E. You, A. L. Paterson, R. Yappert, S. Alayoglu, L. Fang, X. Wu, T. Y. Zhao, M. P. Lapak, M. Saravanan, R. A. Hackler, Y.-Y. Wang, L. Qi, M. Delferro, T. Li, B. Lee, B. Peters, K. R. Poeppelmeier, S. C. Ammal, C. R. Bowers, F. A. Perras, A. Heyden, A. D. Sadow and W. Huang, Nat. Catal. 6 (2023) 161-173.
[2] S. Norsic, C. Larabi, M. Delgado, A. Garron, A. de Mallmann, C. Santini, K. C. Szeto, J.-M. Basset and M. Taoufik, Catal. Sci. Technol. 2 (2012) 215-219.
[3] V. Dufaud and J. M. Basset, Angewandte Chemie - International Edition 37 (1998) 806-810.
[4] F. Quignard, C. Le´cuyer, A. s. Choplin, D. l. Olivier and J.-M. Basset, J. Mol. Catal. 74 (1992) 353-363.
