Ceria has been widely used as catalyst support displaying a size- or shape-dependent catalytic performance due to the strong metal-support interaction (SMSI) effect with active metal. Almost all the studies on the SMSI effect of ceria-supported metal catalysts are involved generally in gas-phase reaction, but rarely in the liquid-phase reaction system. In this work, Cu/CeO₂-P (copper loaded on nano-polyhedral CeO₂ with (1 1 1) terminated surface) was investigated its catalytic performance on liquid-phase hydrogenation and studied the SMSI effect by comparing with the catalysts supported on nano-rod and nano-cube CeO₂. It was found that Cu was highly dispersed on the external surface of ceria in the Cu/CeO₂-P catalyst via a moderate SMSI effect. Furthermore, the degree of the interaction showed great influence on the chemical state of Cu species, and the ratio of (Cu⁺+Cu⁰)/Cu²⁺ in Cu/CeO₂-P was higher than Cu/CeO₂-R (Cu loaded on nano-rod CeO₂ with (1 1 0) plane) and Cu/CeO₂-C (Cu loaded on nano-cube CeO₂ with (1 0 0) facet). As a result, the Cu/CeO₂-P catalyst showed the best catalytic performance among three types of catalysts. Based on series of catalytic investigations, the catalytic performance in liquid-phase hydrogenation was intrinsically relevant to the crystal plane effect and reduced Cu proportion induced by an appropriate SMSI effect, which was completely different from gas-phase hydrogenation.

由于与活性金属的强金属-载体相互作用（SMSI）效应，二氧化铈已被广泛用作显示出尺寸或形状依赖的催化性能的催化剂载体。几乎所有关于二氧化铈负载金属催化剂的SMSI效应的研究通常都涉及气相反应，但很少涉及液相反应系统。在这项工作中，研究了Cu / CeO ₂ -P（铜负载在具有（1 1 1）末端表面的纳米多面CeO ₂上），并通过与负载在催化剂上的催化剂进行比较，研究了其在液相加氢中的催化性能。纳米棒和纳米立方体CeO ₂。发现在Cu / CeO _2中，Cu高度分散在二氧化铈的外表面上。  -P催化剂通过适度的SMSI效应。此外，相互作用的程度对Cu的化学状态影响很大，Cu / CeO ₂ -P中（Cu ⁺ + Cu ⁰）/ Cu ^2+的比例高于Cu / CeO ₂ -R（将Cu负载在具有（1 1 0）平面的纳米棒CeO ₂上）和Cu / CeO ₂ -C（将Cu负载在具有（1 0 0）刻面的纳米立方体CeO ₂上）。结果，Cu / CeO ₂    -P催化剂在三种催化剂中表现出最好的催化性能。基于一系列的催化研究，液相加氢中的催化性能与晶面效应和适当的SMSI效应引起的Cu比例降低本质上相关，这与气相加氢完全不同。