Metal-acid site synergistic catalysis in Ru–ZrO2 toward selective hydrogenation of benzene to cyclohexene†,Catalysis Science & Technology

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Metal-acid site synergistic catalysis in Ru–ZrO2 toward selective hydrogenation of benzene to cyclohexene†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1039/c7cy01351e
Deming Rao _{1,

2,

3,

4,

5} , Xiaoge Xue _{1,

2,

3,

4,

5} , Guoqing Cui _{1,

2,

3,

4,

5} , Shan He _{1,

2,

3,

4,

5} , Ming Xu _{1,

2,

3,

4,

5} , Weihan Bing _{1,

2,

3,

4,

5} , Shuxian Shi _{1,

2,

3,

4,

5} , Min Wei _{1,

2,

3,

4,

5}

Affiliation

Ruthenium-based catalysts are one of the most promising candidates toward selective hydrogenation of benzene. In this work, we synthesized a novel core–shell catalyst by coating porous B-doped ZrO₂ on the surface of Ru/ZrO₂ particles (denoted as Ru/ZrO₂@ZrO₂-B(x%)), in which the hydrogen dissociation occurs on the inner surface of metal Ru and the acid site of the exterior ZrO₂-B(x%) serves as the adsorption site for benzene. The Ru/ZrO₂@ZrO₂-B(5%) sample demonstrates the optimal synergistic catalysis between metal Ru and the weak/medium-strong Lewis acid site of the ZrO₂-B(5%) layer, which promotes the activated adsorption of benzene and desorption of cyclohexene. Therefore, it exhibits the best catalytic performance (benzene conversion: 53.1%; cyclohexene selectivity: 58.8%) without using any additives.

中文翻译：

Ru–ZrO _2中的金属酸位点协同催化苯选择性加氢成环己烯†

钌基催化剂是苯选择性加氢的最有希望的候选者之一。在这项工作中，我们通过在Ru / ZrO ₂颗粒的表面（表示为Ru / ZrO ₂ @ZrO ₂ -B（x％））上涂覆多孔的B掺杂ZrO ₂来合成新型核-壳催化剂。氢解离发生在金属Ru的内表面上，外部ZrO ₂ -B（x％）的酸位充当苯的吸附位。Ru / ZrO ₂ @ZrO ₂ -B（5％）样品表明金属Ru与ZrO ₂的弱/中等强路易斯酸位点之间具有最佳的协同催化作用-B（5％）层，可促进苯的活化吸附和环己烯的解吸。因此，在不使用任何添加剂的情况下，它表现出最佳的催化性能（苯转化率：53.1％；环己烯选择性：58.8％）。

更新日期：2017-11-20

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