Alkaline-Assisted Excessive Impregnation for Enhancing Au Nanoparticle Loading on the TS-1 Zeolite
Direct epoxidation of propylene (C<sub>3</sub>H<sub>6</sub>) with hydrogen (H<sub>2</sub>) and oxygen (O<sub>2</sub>) over the Au/TS-1 catalyst is known as the "Holy Grail" reaction for propylene oxide (PO) synthesis. However, Au nanoparticle loading on TS-1 was limited by traditional deposition precipitation, impregnation and could not achieve ideal catalytic results. In this report, alkaline-assisted excessive impregnation helped to remove Cl<sup>-</sup> from the Au impregnation precursor, improve the loading efficiency of Au nanoparticles and overcome the abnormal growth of nanograins. Better hydrophobicity, surface acidity and an oxygen-containing free radical environment helped Au/TS-1-AEI achieve much better C<sub>3</sub>H<sub>6</sub> conversion (8.0%), PO selectivity (96.7%) and stability (>100 h).
Authors
- Zhe Yang (ORCID: https://orcid.org/0000-0003-1252-4429)
- Bing Sun (ORCID: https://orcid.org/0000-0001-6554-0129)
- Yupeng Tian
- Chenyang Zhao (ORCID: https://orcid.org/0000-0002-2100-580X)
- Haiyuan Jia (ORCID: https://orcid.org/0000-0002-9913-2067)
- Wei Xu (ORCID: https://orcid.org/0000-0001-6570-2159)
- Yujia Liu (ORCID: https://orcid.org/0000-0002-6983-5714)
- Yahui Li (ORCID: https://orcid.org/0000-0002-2376-7533)
Institutions
- Sinopec (China) (CN)
- Qilu University of Technology (CN)
- Shandong Academy of Sciences (CN)
- SINOPEC Research Institute of Safety Engineering Co., Ltd.
Publication Details
- Journal
- Langmuir
- Published
- 2024-12-23
- DOI
- https://doi.org/10.1021/acs.langmuir.4c04101
- Citations
- 5
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 0.59
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Shandong Province