Direct synthesis of hydrogen peroxide from H2/O2 and oxidation of thiophene over supported gold catalysts |
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| Authors: | Shuqi Ma Gang Li Xiangsheng Wang |
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| Affiliation: | 1. Department of Catalytical Chemistry and Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, 158-39, Zhongshan Road, Dalian 116012, PR China;2. School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, PR China;1. Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, United States;2. Institute of Applied and Physical Chemistry, University of Bremen, Bremen, Germany;1. Department of Nano & Chemical Engineering, Kunsan National University, 558 Daehak-ro, Kunsan, Jeollabuk-Do 573-701, Republic of Korea;2. Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea;1. Dipartimento di Scienze Chimiche, Università degli Studi di Padova via Marzolo 8, I35131 Padova, Italy;2. Department of Chemical Engineering, Laboratory of Industrial Chemistry and Reaction Engineering, Process Chemistry Centre (PCC), Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo-Turku, Finland;3. Department of Chemistry, Technical Chemistry, Chemical-Biochemical Centre (KBC), Umeå University, UMEÅ, SE-90187, Sweden;4. Department of Electrical Engineering, Faculty of Technology, Microelectronics and Materials Physics Laboratories, EMPART Research Group of Infotech Oulu, University of Oulu, FI-90014 Oulu, Finland;1. Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, United States;2. Institute of Applied and Physical Chemistry, University of Bremen, Bremen, Germany |
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| Abstract: | Direct synthesis of hydrogen peroxide from H2 and O2 was performed over supported gold catalysts. The catalysts were characterized by means of UV–vis, H2-TPR, TEM and XPS. Based on the results we conclude that metallic Au is the active species in the direct synthesis of hydrogen peroxide from H2 and O2. During preparation process of catalyst by deposition–precipitation with urea, the pH value increased and the gold particle size decreased with increasing the urea concentration. The catalyst prepared with higher urea concentration showed a higher activity and its stability also was efficiently improved. Gold nanoparticles, supported on TiO2 or Ti contained supports, gave a higher catalytic activity. Thiophene can be efficiently oxidized by hydrogen peroxide synthesized in situ from H2 and O2 over Au/TS-1. |
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