One-pot synthesized mesoporous C-TiO2 hybrid for Ru-catalyzed low-temperature hydrogenation of benzoic acid
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A well-designed C-TiO2 hybrid with high surface area (183 m2/g) and highly dispersed nano-TiO2 on carbon was prepared by a facial one-pot hydrothermal reaction using glucose as structure-directing agent and carbon source. The utilization of glucose in hydrothermal process controls the nucleation and growth of TiO2 particles, and the rota-crystallization (hydrothermal crystallization at certain rotating rate) further introduces a uniform TiO2-layer on the carbon particles. The nanosized TiO2 particles and interconnected nanopores of the C-TiO2 hybrid greatly improve the catalytic activity of Ru NPs for selective hydrogenation of benzoic acid (BA) to cyclohexane carboxylic acid in water at low temperature (as low as 50 °C), and the TOF can achieve as high as 283 h−1. Compared with static crystallization, rota-crystallization endows Ru/C-TiO2 higher surface area, easier reducibility of Ru species and higher stability of Ru/C-TiO2 for selective hydrogenation of BA.
This work was supported by National Natural Science Foundation of China (21603066, 21503074, 21673069), Natural Science Fund of Hubei Province (2015CFB232), Natural Science Fund of the Education Department of Hubei Province (Q2015009).
- 6.Chen B, Dingerdissen U, Krauter JGE, Lansink Rotgerink HGJ, Möbus K, Ostgard DJ, Panster P, Riermeier TH, Seebald S, Tacke T, Trauthwein H (2005) New developments in hydrogenation catalysis particularly in synthesis of fine and intermediate chemicals. Appl Catal A 280:17–46. https://doi.org/10.1016/j.apcata.2004.08.025 CrossRefGoogle Scholar
- 19.Iqbal S, Liu X, Aldosari OF, Miedziak PJ, Edwards JK, Brett GL, Akram A, King GM, Davies TE, Morgan DJ, Knight DK, Hutchings GJ (2014) Conversion of furfuryl alcohol into 2-methylfuran at room temperature using Pd/TiO2 catalyst. Catal Sci Technol 4:2280–2286. https://doi.org/10.1039/c4cy00184b CrossRefGoogle Scholar
- 21.Zhou G, Dong Y, He D (2018) Bimetallic Ru-M/TiO2 (M = Fe, Ni, Cu, Co) nanocomposite catalysts facribated by galvanic replacement: structural elucidation and catalytic behavior in benzene selective hydrogenation. Appl Surf Sci 456:1004–1013. https://doi.org/10.1016/j.apsusc.2018.06.206 CrossRefGoogle Scholar
- 24.Yoshida H, Igarashi N, Si Fujita, Panpranot J, Arai M (2014) Influence of crystallite size of TiO2 supports on the activity of dispersed Pt catalysts in liquid-phase selective hydrogenation of 3-nitrostyrene, nitrobenzene, and styrene. Catal Lett 145:606–611. https://doi.org/10.1007/s10562-014-1404-4 CrossRefGoogle Scholar
- 29.Kominami H, Kato J, Takada Y, Doushi Y, Ohtani B, Nishimoto S, Inoue M, Inui T, Kera Y (1997) Novel synthesis of microcrystalline titanium(IV) oxide having high thermal stability and ultra-high photocatalytic activity: thermal decomposition of titanium(IV) alkoxide in organic solvents. Catal Lett 46:235–240. https://doi.org/10.1023/a:1019022719479 CrossRefGoogle Scholar
- 34.Kovtunov KV, Barskiy DA, Salnikov OG, Burueva DB, Khudorozhkov AK, Bukhtiyarov AV, Prosvirin IP, Gerasimov EY, Bukhtiyarov VI, Koptyug IV (2015) Strong metal-support interactions for palladium supported on TiO2 catalysts in the heterogeneous hydrogenation with parahydrogen. ChemCatChem 7:2581–2584. https://doi.org/10.1002/cctc.201500618 CrossRefGoogle Scholar