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- Title
Enhancing alkyne semi-hydrogenation through engineering metal-support interactions of Pd on oxides.
- Authors
Wu, Yuefeng; Lu, Xiaotong; Cui, Pengfei; Jia, Wenyu; Zhou, Jun; Wang, Yuan; Zahid, Hussain; Wu, Yuxin; Rafique, Muhammad Umer; Yin, Xiong; Li, Baoshan; Wang, Leyu; Xiang, Guolei
- Abstract
Supported Pd catalysts show superior activities for olefin productions from alkynes through semi-hydrogenation reactions, but over-hydrogenation into alkanes highly decreases olefin selectivity. Using phenylacetylene semi-hydrogenation as a model reaction, here we explore the optimization approaches toward better Pd catalysts for alkyne semi-hydrogenation through investigating support effect and metal-support interactions. The results show that the states of Pd with supports can be tuned by varying oxide reducibility, loading ratios, and post-treatments. In our system, 0.06 wt.% Pd on rutile-TiO2 nanorods shows the highest activity owing to the synergistic effects of single-atoms and clusters. Support reducibility can change the filling degrees of Pd 4d orbitals through varying interfacial bonding strengths, which further affect catalytic activity and selectivity.
- Subjects
ETHYNYL benzene; CATALYTIC activity; INTERFACIAL bonding; ALKENES; OXIDES; CARBON nanotubes; NANORODS
- Publication
Nano Research, 2024, Vol 17, Issue 5, p3707
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-023-6280-z