Peng, Baoxiang - Ruhr University Bochum - Laboratory of Industrial Chemistry

研究领域

Three-Phase Catalysis under Mild Conditions Our research performs fundamental research in the area of heterogeneous redox catalysis in the liquid phase under mild conditions and aims at obtaining a comprehensive understanding for three-phase catalytic redox reactions. By developing tailor-made heterogeneous catalysts, we aim at increasing the efficiency of chemical redox processes. Catalytic Reduction The hydrogenation of nitrobenzene to aniline is one of the key hydrogenation reactions in the chemical industry, while various biomass-derived platform molecules can be converted to biofuels and chemicals via hydrogenation, hydrodeoxygenation and/or hydrogenolysis. Besides molecular H2, we also use formic acid (FA), which can be produced from biomass or electrochemical reduction of CO2, as an alternative hydrogen donor. Employed catalysts are mainly Pd-based catalysts, such as Pd nanoparticles supported on various metal oxides and on carbon materials as well as Pd single-atom catalysts. The reaction conditions like temperature, pressure, substrate/metal ratio and different types of solvents are systematically optimized to obtain high yields of the products. Detailed kinetic studies and reusability are investigated. Furthermore, the decomposition of formic acid and in situ spectroscopic studies will be carried out for obtaining a comprehensive understanding of the reaction mechanism and the multiple roles of formic acid. Catalytic Oxidation Oxidation reactions are investigated with molecular oxygen as the preferred oxidant as well as with alternative oxidants such as hydrogen peroxide and tert-butyl hydroperoxide (TBHP) as oxygen donor. Employed catalysts include mixed transition metal-based spinel and perovskite oxides, metal-organic frameworks (MOFs), Cu-based single-atom catalyst, and noble metal-based catalysts such as Au-Pd/CNTs. These catalysts were tested in different oxidation reactions to comprehensively assess their chemical reactivity by finding activity and selectivity patterns in a reaction matrix. The reaction matrix is formed by variation of the substrate (i.e., alcohols like 2-propanol, benzyl alcohol and cinnamyl alcohol, olefins like styrene and cyclohexene, and aromatic hydrocarbons like toluene) and the oxidant (i.e., O2 vs. peroxide such as H2O2 and TBHP). In addition, the decomposition of the reactant or intermediate peroxides provides us important mechanistic insights.

近期论文

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Formic acid-assisted selective hydrogenolysis of 5-hydroxymethylfurfural to 2,5-dimethylfuran over bifunctional Pd nanoparticles supported on N-doped mesoporous carbon , B. Hu, L. Warczinski, X. Li, M. Lu, J. Bitzer, M. Heidelmann, T. Eckhard, Q. Fu, J. Schulwitz, M. Merko, M. Li, W. Kleist, C. Hättig, M. Muhler, B. Peng* Angew. Chem. Int. Ed. 2020 , doi.org/10.1002/anie.202012816 Selective cyclohexene oxidation with O2, H2O2 and tert-butyl hydroperoxide over spray flame synthesized LaCo1-xFexO3 nanoparticles , J. Büker, B. Alkan, Q. Fu, W. Xia, J. Schulwitz, D. Waffel, T. Falk, C. Schulz, H. Wiggers, M. Muhler, B. Peng* Catal. Sci. Technol. 10 2020 , 5196-5206. Investigation of synergistic effects between Co and Fe in Co3-xFexO4 spinel catalysts for the liquid-phase oxidation of aromatic alcohols and styrene , D. Waffel, E. Budiyanto, T. Porske, J. Büker, T. Falk, Q. Fu, S. Schmidt, H. Tüysüz, M. Muhler, B. Peng* Mol. Catal., 498 2020 , 111251-111259. The kinetics of glycerol hydrodeoxygenation to 1,2-propanediol over Cu/ZrO2 in the aqueous phase , T. Gabrysch, M. Muhler, B. Peng* Appl. Catal. A - Gen., 576 2019 , 47-53. Regulating the size and spatial distribution of Pd nanoparticles supported by the defect engineered metal–organic framework HKUST-1 and applied in the aerobic oxidation of cinnamyl alcohol , P. Guo, Q. Fu, C. Yildiz, Y. T. Chen, K. Ollegott, C. Froese, W. Kleist, R. A. Fischer, Y. Wang*, M. Muhler, B. Peng* Catal. Sci. Technol., 9 2019 , 3703-3710. Towards mechanistic understanding of liquid-phase cinnamyl alcohol oxidation with tert-butyl hydroperoxide over noble-metal free La-Co-Fe perovskites , D. Waffel, B. Alkan, Q. Fu, Y. T. Chen, C. Schulz, H. Wiggers, M. Muhler, B. Peng* ChemPlusChem, 84 2019 , 1155-1163. Photocatalytic one-step synthesis of Ag nanoparticles without reducing agent and their catalytic redox performance supported on carbon , L. Shui, G. Zhang, B. Hu, X. Chen, M. Jin, G. Zhou, N. Li*, M. Muhler*, B. Peng* J. Energy Chem., 36 2019 , 37-46. The role of metallic copper in the selective hydrodeoxygenation of glycerol to 1,2-propanediol over Cu/ZrO2 , T. Gabrysch, B. Peng*, S. Bunea, G. Dyker, M. Muhler* ChemCatChem, 10 2018 , 1344-1350. Towards quantitative conversion of microalgae oil to diesel range alkanes with bifunctional catalysts , B. Peng, Y. Yao, C. Zhao, J. A. Lercher* Angew. Chem. Int. Ed., 51 2012 , 2072-2075. Stabilizing catalytic pathways via redundancy - selective reduction of microalgae oil to alkanes , B. Peng, X. Yuan, C. Zhao, J. A. Lercher* J. Am. Chem. Soc., 134 2012 , 9400-9405.