Aijuan Han+, Jian Zhang+, Wenming Sun+, Wenxing Chen, Shaolong Zhang, Yunhu Han, Quanchen Feng, Lirong Zheng, Lin Gu, Chen Chen, Qing Peng, Dingsheng Wang*, Yadong Li*, Isolating contiguous Pt atoms and forming Pt-Zn intermetallic nanoparticles to regulate selectivity in 4-nitrophenylacetylene hydrogenation

Release time:2023-05-21 Hits:

DOI number:10.1038/s41467-019-11794-6

Journal:Nature Communications

Abstract:Noble metals play a momentous role in heterogeneous catalysis but still face a huge challenge in selectivity control. Herein, we report isolating contiguous Pt atoms and forming Pt-Zn intermetallic nanoparticles as an effective strategy to optimize the selectivity of Pt catalysts. Contiguous Pt atoms are isolated into single atoms and Pt-Zn intermetallic nanoparticles are formed which are supported on hollow nitrogen-doped carbon nanotubes (PtZn/HNCNT), as confirmed by aberration-corrected high-resolution transmission electron microscopy and X-ray absorption spectrometry measurements. Interestingly, this PtZn/HNCNT catalyst promotes the hydrogenation of 4-nitrophenylacetylene to 4-aminophenylacetylene with a much higher conversion ( > 99%) and selectivity (99%) than the comparison samples with Pt isolated-single-atomic-sites (Pt/HNCNT) and Pt nanoparticles (Pt/CN). Further density functional theory (DFT) calculations disclose that the positive Zn atoms assist the adsorption of nitro group and Pt-Zn intermetallic nanoparticles facilitate the hydrogenation on nitro group kinetically.

Indexed by:Journal paper

Discipline:Natural Science

Document Type:J

Volume:10

Page Number:3787

Translation or Not:no

Date of Publication:2019-08-22

Included Journals:SCI

Links to published journals:https://www.nature.com/articles/s41467-019-11794-6