Abstract As-synthesized Cu-Al LDH was dealuminated by treating with Ammonium hexafluorosilicate (AFS) and calcined to obtain Cu-Al oxide. Cu species from 5 to 20 wt% was impregnated on Cu-Al oxide derived from dealuminated Cu-Al LDH. Resulting samples were characterized by XRD, AAS, BET, TEM, TPR and XPS techniques. Copper species impregnated on dealuminated Cu-Al oxide exhibit enhanced activity in hydrogenation of furfural (FAL) to furfuryl alcohol (FOL). Hydrogen uptake and FAL conversion were found to increase proportionately as the copper species dispersed in the pores vary from 5 to 15 wt%. A maximum yield of 87 mol% FAL was observed with 15 wt% Cu loaded sample. Percent occupancy of the copper active species in the pores is calculated by the decrease in pore volume. A factor called pore occupancy hydrogenation efficiency is introduced to explain the FAL conversion ability of the copper loaded mixed oxides. In contrast, mixed oxides derived from Cu-Al LDH without dealumination showed moderate conversion.

中文翻译：

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脱铝 LDH 衍生的高多孔 Cu-Al 氧化物在糠醛转化为糠醇中的加氢效率

摘要 合成的Cu-Al LDH经六氟硅酸铵(AFS)处理脱铝，煅烧得到Cu-Al氧化物。将 5 至 20 wt% 的 Cu 物质浸渍在源自脱铝 Cu-Al LDH 的 Cu-Al 氧化物上。所得样品通过 XRD、AAS、BET、TEM、TPR 和 XPS 技术进行表征。浸渍在脱铝 Cu-Al 氧化物上的铜物种在糠醛 (FAL) 氢化为糠醇 (FOL) 中表现出增强的活性。发现氢吸收和 FAL 转化率随着分散在孔隙中的铜物质从 5% 到 15% 不等而按比例增加。使用 15 wt% 的 Cu 负载样品观察到 87 mol% FAL 的最大产率。孔中铜活性物质的占有率通过孔体积的减少来计算。引入一个称为孔隙占有氢化效率的因素来解释负载铜的混合氧化物的 FAL 转化能力。相比之下，从未经脱铝的 Cu-Al LDH 衍生的混合氧化物显示出中等转化率。