文献类型：期刊文献

英文题名：Enhanced photothermal dehydration of methanol over W₁₈O₄₉/Au/SAPO-34 catalysts with broadened light absorption

作者：Tang, Ya-Qin Yan, Meng-Xia Lu, Chang-Qian Li, Shao-Yuan Wei, Kui-Xian Qu, Tao Ma, Wen-Hui Dai, Yong-Nian Li, Kong-Zhai Luo, Da-Jun Zhang, Xue-Liang Liu, Yi-Ke

第一作者：Tang, Ya-Qin;唐雅琴

通信作者：Liu, YK[1];Zhang, XL[2];Liu, YK[2]

机构：[1]Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China

第一机构：Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China

通信机构：corresponding author), Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2023

外文期刊名：RARE METALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001124774200003)】；

基金：This work was financially supported by the High-level Innovative Talent Cultivation Project of Guizhou Province (No. GZSQCC2019003), the Natural Science Research Project of Guizhou Provincial Department of Education (No. QJHKY Zi[2021]257) and the Academic New Seedling Cultivation and Innovation Exploration Project of Guizhou Institute of Technology (No. GZLGXM-08).

语种：英文

外文关键词：Methanol conversion; Ethylene; Photothermal catalysis; W18O49; Bronsted-acid

摘要：Methanol-to-olefins (MTO) process is one of the most critical pathways to produce low carbon olefins. Typically, the reaction is driven by thermal catalysis, which inevitably needs to consume large amounts of fossil fuel. Developing a new technique to substitute for the fuel burning is urgent for MTO process to improve the industry prospects and sustainability. Herein, we report a novel W18O49/Au/SAPO-34 (W/Au/S), a multifunctional photothermal catalyst for the MTO reaction. A high methanol conversion was achieved under xenonum (Xe) lamp irradiation, yielding methyl ether (ME) and ethylene as the main products. The optimized W/Au/S catalysts showed ethylene yield as high as 250 mu mol in 60 min, which was 2.5 times higher than that of Au/SAPO-34. The physiochemical characterization revealed that the SAPO-34 molecular sieves were surrounded by Au and W18O49 nanoparticles, which exhibited a strong localized surface plasmon resonance excitation around 540 nm and light absorption beyond 500 nm. The multifunctional catalysts showed a strong photothermal effect, arising from the broadened light absorption of Au and W18O49 nanoparticles, leading to a temperature as high as 250 degrees C on the surface of the catalysts. Mechanism study showed that the superior ethylene selectivity of W/Au/S catalysts was attributed to the moderating acidic sites of W18O49 for methanol dehydration to ethylene. This research may provide new insight for designing heterostructures to improve photo-to-chemical conversion performance and is expected to accelerate progress toward the excellent multifunctional photothermal catalysts with broad light absorption for methanol activation and C-C bond formation.