TiO2 supported Ru catalysts for the hydrogenation of succinic acid: influence of the support,Catalysis Science & Technology

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TiO2 supported Ru catalysts for the hydrogenation of succinic acid: influence of the support
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-08-26 , DOI: 10.1039/d0cy01446j
Magdalena Brzezinska _{1,

2,

3,

4,

5} , Johannes Niemeier _{6,

7,

8,

9} , Yannik Louven _{6,

7,

8,

9} , Nicolas Keller _{10,

11,

12,

13,

14} , Regina Palkovits _{6,

7,

8,

9} , Agnieszka M. Ruppert _{1,

2,

3,

4,

5}

Affiliation

Succinic acid is a valuable biomass-derived platform molecule, which can be further catalytically converted into many industrially relevant molecules such as γ-butyrolactone, 1,4-butanediol or tetrahydrofuran. The influence of the support nature on both the activity of Ru/TiO₂ catalysts and the selectivity pattern in the hydrogenation of succinic acid was investigated, with focus on the metal–support interaction, the crystallographic structure of the TiO₂ support and the supported Ru nanoparticle size features. We showed that the catalyst activity was related to both the Ru particle size and the metal support interaction, those features being induced by the presence of the rutile phase within the TiO₂ support and by the preparation method of the supported Ru particles. The rutile phase not only favors the formation of small Ru particles but also promotes stronger metal–support interaction compared with the anatase polymorph. Strong interactions between metal and support can also be formed via thermal reduction in contrast to low-temperature direct chemical reduction. Interestingly, a low temperature solar photon-assisted synthesis method facilitates very high succinic acid conversion, by enabling the stabilization of 1.8 nm small-size Ru nanoparticles in the absence of any rutile phase within the TiO₂ support.

中文翻译：

TiO2负载的Ru催化剂用于琥珀酸加氢：载体的影响

琥珀酸是有价值的生物质衍生的平台分子，可以进一步催化转化为许多工业上相关的分子，例如γ-丁内酯，1,4-丁二醇或四氢呋喃。研究了载体性质对Ru / TiO ₂催化剂活性和琥珀酸加氢选择性模式的影响，重点研究了金属-载体相互作用，TiO ₂载体和负载型Ru的晶体结构。纳米尺寸特征。我们表明，催化剂活性与Ru粒径和金属载体相互作用有关，这些特征是由TiO _2中金红石相的存在引起的。载体和通过负载的Ru颗粒的制备方法。与锐钛型多晶型物相比，金红石相不仅有利于形成小的Ru颗粒，而且还促进了更强的金属-载体相互作用。与低温直接化学还原相反，还可以通过热还原形成金属与载体之间的强相互作用。有趣的是，低温太阳光子辅助合成方法通过在TiO ₂载体内不存在任何金红石相的情况下稳定1.8 nm的小尺寸Ru纳米颗粒，从而促进了非常高的琥珀酸转化。

更新日期：2020-10-19

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