Synthesis of -MoC1−x Nanoparticles with a Surface-Modified SBA-15 Hard Template: Determination of Structure-Function Relationships in Acetic Acid Deoxygenation

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• 作者：Dr. Frederick G. Baddour ; Connor P. Nash ; Dr. Joshua A. Schaidle and Dr. Daniel A. Ruddy
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：July 25, 2016
• 年：2016
• 卷：55
• 期：31
• 页码：9026-9029
• 全文大小：1215K
• ISSN：1521-3773

文摘

Surface modification of mesoporous SBA-15 silica generated a hydrophobic environment for a molybdenum diamine (Mo-diamine) precursor solution, enabling direct growth of isolated 1.9±0.4 nm α-MoC_1−x nanoparticles (NPs) inside the pores of the support. The resulting NP catalysts are bifunctional, and compared to bulk α-MoC_1−x and β-Mo₂C, the NPs exhibit a greater acid-site:H-site ratio and a fraction of stronger acid sites. The greater acid-site:H-site ratio results in higher decarbonylation (DCO) selectivity during acetic acid hydrodeoxygenation (HDO) reactions, and the stronger acid sites lead to higher activity and ketonization (KET) selectivity at high temperatures. The hard-templating synthetic method could be a versatile route toward carbide NPs of varying size, composition, and phase, on a range of mesoporous oxide supports.