Hydrogenation of the LOHC Compound Monobenzyl Toluene over ZrO2‐supported Ru Nanoparticles: A Consequence of Zirconium Hydroxide's Surface Hydroxyl Group and Surface Area,ChemCatChem

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Hydrogenation of the LOHC Compound Monobenzyl Toluene over ZrO2‐supported Ru Nanoparticles: A Consequence of Zirconium Hydroxide's Surface Hydroxyl Group and Surface Area
ChemCatChem ( IF 3.8 ) Pub Date : 2018-07-03 , DOI: 10.1002/cctc.201800565
Tae Wan Kim ₁ , Seowoo Park ₁ , Jinho Oh ₁ , Chae-Ho Shin ₂ , Young-Woong Suh _{1,

3}

Affiliation

Monobenzyl toluene (H₀‐MBT) is an interesting material as a liquid organic hydrogen carrier, which is commercially available as heat transfer oil. In H₂ storage of H₀‐MBT via the hydrogenation reaction, supported Ru catalysts were reported to show superior performance. Herein, ZrO₂‐supported Ru nanoparticles were synthesized by using triruthenium dodecarbonyl Ru₃(CO)₁₂ as Ru precursor and precipitated zirconium hydroxide subjected to different ageing periods. Although the extended ageing resulted in a larger BET surface area of Ru/ZrO₂, the hydrogenation activity and Ru dispersion turned out to be in a volcano‐shaped dependence on the ageing period. The characterization work on zirconium hydroxide revealed that the relative number of surface to bridging oxygen species decreased upon prolonged ageing and the hydroxylation degree largely affected the interaction with CO ligand of adsorbed Ru species. Consequently, the hydrogenation activity trend of the present Ru/ZrO₂ was a combined consequence of the surface OH content and surface area of zirconium hydroxide.

中文翻译：

ZrO2负载的Ru纳米粒子上的LOHC化合物单苄基甲苯的氢化：氢氧化锆的表面羟基和表面积的后果

单苄基甲苯（H ₀ -MBT）是一种有趣的材料，它是液态有机氢载体，可以热传递油的形式在市场上买到。据报道，通过氢化反应在H ₀ -MBT的H ₂储存中，负载型Ru催化剂表现出优异的性能。在此，以十二碳三钌Ru ₃（CO）₁₂为Ru前驱体，使ZrO ₂负载的Ru纳米粒子合成，并使其沉淀的氢氧化锆经历不同的老化时间。尽管长时间的老化导致Ru / ZrO ₂的更大的BET表面积，加氢活性和Ru的分散度最终显示出对火山作用的依赖程度。对氢氧化锆的表征工作表明，随着时间的延长，表面与桥连氧物种的相对数量会减少，并且羟基化程度在很大程度上影响了吸附的Ru物种与CO配体的相互作用。因此，当前Ru / ZrO ₂的氢化活性趋势是表面OH含量和氢氧化锆表面积的综合结果。

更新日期：2018-07-03

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