文献类型：期刊文献

英文题名：Impregnating photo-stable gold precursor onto uncalcined TS-1 to boost catalytic hydro-oxidation of propane

作者：Zhang, Zhihua[1];Yang, Erchuan[1];Liu, Fan[1];Xu, Kesheng[1];Zhong, Yuxia[1];Sun, Jinwei[1];Shi, Shudong[1];Duan, Xuezhi[1];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：68

期号：4

起止页码：1585

外文期刊名：SCIENCE CHINA-CHEMISTRY

收录：;EI(收录号：20250717848225);WOS:【SCI-EXPANDED(收录号:WOS:001394607500001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22208093, 22038003, 22178100, and 21922803), the Ministry of Science and Technology of the People's Republic of China under the Research Fund for National Key R&D Program of China (2021YFA1501403), the Program of Shanghai Academic/Technology Research Leader (21XD1421000), the Shanghai Science and Technology Innovation Action Plan (22JC1403800), and the Innovation Program of the Shanghai Municipal Education Commission.

语种：英文

外文关键词：hydro-oxidation of propane; acetone; Au-Ti bifunctional catalysts; IWI method; thiol ligands; stability

摘要：Immobilizing highly dispersed Au nanoparticles onto titanium silicalite-1 (TS-1) by a simple impregnation method under light is still a challenging task. In this work, a high photostable Au precursor protected by thiol ligands was firstly synthesized, and the as-prepared Au precursor displayed excellent stability under light for over 30 days, while the Au precursor without thiol ligands formed precipitates after just 2 h under light. Subsequently, the Au precursor protected by thiol ligands was immobilized on the external surface of uncalcined TS-1 (i.e., TS-1-B) by the incipient wetness impregnation method (IWI method) to prepare Au/TS-1-B catalyst. The activity of as-prepared Au/TS-1-B catalyst in the hydro-oxidation of propane to acetone was 1.4 times higher than that of the catalyst prepared by the deposition-precipitation urea method (DPU method). The structures of the Au/TS-1-B catalysts prepared by different methods were analyzed by multiple characterizations. Compared to the Au/TS-1-B catalyst prepared by the DPU method, the Au/TS-1-B catalyst synthesized by the IWI method exhibited a narrower size distribution of Au nanoparticles and had more small Au particles (<2 nm), which is the main reason for its superior activity. Additionally, the effects of gold loadings, reaction temperature and Si/Ti molar ratio on the catalytic performance of the Au/TS-1-B catalyst prepared by the IWI method were also investigated. In addition, the Au/TS-1-B catalyst prepared by the IWI method also exhibited excellent stability for over 140 h.