A highly reducible CeO₂ surface was prepared on a SiO₂ support to investigate the effect of redox properties of CeO₂ on the catalytic activity of Pt/CeO₂-SiO₂ for MCH dehydrogenation. Characterization of the Pt/CeO₂-SiO₂ catalyst revealed a significantly higher Pt dispersion than Pt/micro-sized CeO₂ and Pt/SiO₂. The well-dispersed Pt particles averaging 1.1 nm in size (Pt/CeO₂-SiO₂₎ were primarily attributed to the high surface concentration of oxygen vacancies, which provided abundant defect sites that stabilized the Pt particles from sintering. Hydrogen released from MCH dehydrogenation was approximately 5–6 times greater with high selectivity towards toluene products for Pt/CeO₂-SiO₂ compared to its counterparts. The excellent catalytic activity of Pt/CeO₂-SiO₂ was attributed to the presence of rich oxygen vacancies on the CeO₂ surface, which was significantly reduced under MCH dehydrogenation conditions, resulting in faster toluene desorption.

_{在SiO 2}载体上制备高度可还原的CeO ₂表面以研究CeO ₂的氧化还原性质对Pt/CeO ₂ -SiO ₂催化MCH脱氢活性的影响。Pt/CeO ₂ -SiO ₂催化剂的表征表明，Pt 分散度明显高于 Pt/微型 CeO ₂和 Pt/SiO ₂。分散良好的 Pt 颗粒平均尺寸为 1.1 nm (Pt/CeO ₂ -SiO ₂₎主要归因于氧空位的高表面浓度，它提供了丰富的缺陷位点，稳定了 Pt 颗粒的烧结。与对应物相比，MCH 脱氢释放的氢气大约高 5-6 倍，对 Pt/CeO ₂ -SiO _{2的甲苯产品具有高选择性。Pt/CeO 2} -SiO ₂优异的催化活性归因于CeO ₂表面存在丰富的氧空位，在MCH脱氢条件下氧空位显着减少，导致甲苯脱附更快。