Two-dimensional atomically thin Pt layers on MXenes: The role of electronic effects during catalytic dehydrogenation of ethane and propane
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Atomically thin Pt nanolayers were synthesized on the surface of Mo2TiC2 MXenes and used for the catalytic dehydrogenation of ethane and propane into ethylene and propylene, two important chemicals for the petrochemical industry. As compared with Pt nanoparticles, the atomically thin Pt nanolayer catalyst showed superior coke-resistance (no deactivation for 24 h), high activity (turnover frequencies (TOFs) of 0.4–1.2 s−1), and selectivity (> 95%) toward ethylene and propylene. The unique Pt nanolayer has a similar geometric surface to Pt nanoparticles, enabling the investigations of the electronic effect on the catalytic performance, where the geometric effect is negligible. It is found that the electronic effect plays a critical role in dehydrogenative product selectivity and catalyst stability. The metal–support interaction is found dependent on the substrate and metal components, providing wide opportunities to explore high-performance MXene-supported metallic catalysts.
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Two-dimensional atomically thin Pt layers on MXenes: The role of electronic effects during catalytic dehydrogenation of ethane and propane
Abstract
Atomically thin Pt nanolayers were synthesized on the surface of Mo2TiC2 MXenes and used for the catalytic dehydrogenation of ethane and propane into ethylene and propylene, two important chemicals for the petrochemical industry. As compared with Pt nanoparticles, the atomically thin Pt nanolayer catalyst showed superior coke-resistance (no deactivation for 24 h), high activity (turnover frequencies (TOFs) of 0.4–1.2 s−1), and selectivity (> 95%) toward ethylene and propylene. The unique Pt nanolayer has a similar geometric surface to Pt nanoparticles, enabling the investigations of the electronic effect on the catalytic performance, where the geometric effect is negligible. It is found that the electronic effect plays a critical role in dehydrogenative product selectivity and catalyst stability. The metal–support interaction is found dependent on the substrate and metal components, providing wide opportunities to explore high-performance MXene-supported metallic catalysts.
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Acknowledgements
Y. W., Z. L., F. Y., and X. P. L. thank the support from Iowa State University (Herbert L. Stiles Professorship). Y. X. and T. K. M. appreciate the start-up funding from the College of Engineering and Science at Louisiana Tech University. Z. W. W. and J. T. M. were supported by the National Science Foundation under Cooperative Agreement (NSF/ERC CISTAR, No. EEC-164772). Use of the Advanced Photon Source, a US Department of Energy Office of Basic Energy Sciences, was supported under contract no. DE-AC02-06CH11357. The MRCAT beamline 10-BM is supported by the Department of Energy as well as the MRCAT member institutions.
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