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the active sites and reduces the activity of the catalyst. In order to reduce the influence of water on the reaction system, a hydrophobic catalyst was prepared for the one-step oxidative esterification of methylacrolein (MAL) and methanol. The catalyst was synthesized by loading the active component Au onto ZnO using the deposition\u2013precipitation method, followed by constructing the silicon shell on Au\/ZnO using tetraethoxysilane (TEOS) to introduce hydrophobic groups. Trimethylchlorosilane (TMCS) was used as a hydrophobic modification reagent to prepare hydrophobic catalysts, which exhibited a water droplet contact angle of 111.2\u00b0. At a temperature of 80 \u00b0C, the hydrophobic catalyst achieved a high MMA selectivity of over 95%. The samples were characterized using XRD, N2 adsorption, ICP, SEM, TEM, UV-vis, FT-IR, XPS, and water droplet contact angle measurements. Kinetic analysis revealed an activation energy of 22.44 kJ\/mol for the hydrophobic catalyst.<\/jats:p>","DOI":"10.3390\/molecules29081854","type":"journal-article","created":{"date-parts":[[2024,4,19]],"date-time":"2024-04-19T04:10:15Z","timestamp":1713499815000},"page":"1854","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Preparation of Hydrophobic Au Catalyst and Application in One-Step Oxidative Esterification of Methacrolein to Methyl Methacrylate"],"prefix":"10.3390","volume":"29","author":[{"given":"Yanxia","family":"Zheng","sequence":"first","affiliation":[{"name":"Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yubo","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yixuan","family":"Li","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lu","family":"Cai","sequence":"additional","affiliation":[{"name":"Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuanjiao","family":"Zhao","sequence":"additional","affiliation":[{"name":"Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bing","family":"Xue","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuchao","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiutao","family":"An","sequence":"additional","affiliation":[{"name":"School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jialiang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shandong Mingsheng Environmental Protection Technology Co., Ltd., Jinan 250000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"367","DOI":"10.1016\/S0926-860X(01)00810-9","article-title":"New developments in the production of methyl methacrylate","volume":"221","author":"Nagai","year":"2001","journal-title":"Appl. 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