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

机构：[1] Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; [2] School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China

通信机构：Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China;School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China|贵州理工学院;

年份：2023

外文期刊名：Rare Metals

收录：EI(收录号：20235115239157);Scopus(收录号：2-s2.0-85179690733)

语种：英文

外文关键词：Catalyst selectivity - Chemical bonds - Dehydration - Ethylene - Fossil fuels - Gold - Image enhancement - Light absorption - Methanol - Molecular sieves - Nanoparticles - Surface plasmon resonance

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?μmol 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?°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. Graphical abstract: [Figure not available: see fulltext.] ? 2023, Youke Publishing Co.,Ltd.