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Cheng M, Zhang X, Guo Z, Lv P, Xiong R, Wang Z, Zhou Z, Zhang M. Pd-promoting reduction of zinc salt to PdZn alloy catalyst for the hydrogenation of nitrothioanisole. J Colloid Interface Sci 2021; 602:459-468. [PMID: 34144303 DOI: 10.1016/j.jcis.2021.06.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 11/28/2022]
Abstract
Catalytic hydrogenation of sulfur-containing substrates is an important and challenging reaction in the chemical industry. In this work, active carbon supported PdZn alloy catalyst was prepared by self-reduction method using zinc acetate as precursor without H2 atmosphere. During the process of self-reduction, Zn2+ was firstly reduced to Zn0 at 300 °C by active carbon and reducing gas from the decompose of acetate under the promotion of metal Pd, and Zn0 further reacted with metal Pd to form PdZn alloy phase at 500 °C. These PdZn/AC-X catalysts showed the higher conversion and stability for the hydrogenation of 4-nitrothioanisole than the Pd/AC-600 catalyst. The excellent catalytic performance of PdZn/AC-600 catalyst can be attributed to formation of PdZn alloy, in which electron-rich Pd atoms weaken the binding ability between Pd and S and enhance the sulfur-resistance of catalyst. On the other hand, H2-TPR and DFT theory calculation further indicated that the PdZn alloy phase weakens the adsorption capacity of S. Compared with the Pd/AC-600 catalyst, the PdZn alloy phase in PdZn/AC-600 catalyst has not changed and only a small amount of sulfur-containing substrates deposited on the catalyst surface after three cycles. PdZn/AC-600 catalyst exhibited improved stability in the hydrogenation of 4-nitrothioanisole and can be used three cycles with little decrease in activity.
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Affiliation(s)
- Ming Cheng
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Xu Zhang
- School of Materials Science and Engineering, Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300350, PR China
| | - Zhenbo Guo
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Peifan Lv
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Renjie Xiong
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, PR China
| | - Zhiqiang Wang
- Tianjin Key Laboratory of Water Environment and Resources, Tianjin Normal University, Tianjin 300387, PR China.
| | - Zhen Zhou
- School of Materials Science and Engineering, Institute of New Energy Material Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300350, PR China
| | - Minghui Zhang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, PR China.
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Hydrogenation of Aqueous Acetic Acid over Ru-Sn/TiO2 Catalyst in a Flow-Type Reactor, Governed by Reverse Reaction. Catalysts 2020. [DOI: 10.3390/catal10111270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Ru-Sn/TiO2 is an effective catalyst for hydrogenation of aqueous acetic acid to ethanol. In this paper, a similar hydrogenation process was investigated in a flow-type rather than a batch-type reactor. The optimum temperature was 170 °C for the batch-type reactor because of gas production at higher temperatures; however, for the flow-type reactor, the ethanol yield increased with reaction temperature up to 280 °C and then decreased sharply above 300 °C, owing to an increase in the acetic acid recovery rate. The selectivity for ethanol formation was improved over the batch process, and an ethanol yield of 98 mol % was achieved for a 6.7 min reaction (cf. 12 h for batch) (liquid hourly space velocity: 1.23 h−1). Oxidation of ethanol to acetic acid (i.e., the reverse reaction) adversely affected the hydrogenation. On the basis of these results, hydrogenation mechanisms that include competing side reactions are discussed in relation to the reactor type. These results will help the development of more efficient catalytic procedures. This method was also effectively applied to hydrogenation of lactic acid to propane-1,2-diol.
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Bioalcohol Reforming: An Overview of the Recent Advances for the Enhancement of Catalyst Stability. Catalysts 2020. [DOI: 10.3390/catal10060665] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The growing demand for energy production highlights the shortage of traditional resources and the related environmental issues. The adoption of bioalcohols (i.e., alcohols produced from biomass or biological routes) is progressively becoming an interesting approach that is used to restrict the consumption of fossil fuels. Bioethanol, biomethanol, bioglycerol, and other bioalcohols (propanol and butanol) represent attractive feedstocks for catalytic reforming and production of hydrogen, which is considered the fuel of the future. Different processes are already available, including steam reforming, oxidative reforming, dry reforming, and aqueous-phase reforming. Achieving the desired hydrogen selectivity is one of the main challenges, due to the occurrence of side reactions that cause coke formation and catalyst deactivation. The aims of this review are related to the critical identification of the formation of carbon roots and the deactivation of catalysts in bioalcohol reforming reactions. Furthermore, attention is focused on the strategies used to improve the durability and stability of the catalysts, with particular attention paid to the innovative formulations developed over the last 5 years.
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Yun Q, Lu Q, Li C, Chen B, Zhang Q, He Q, Hu Z, Zhang Z, Ge Y, Yang N, Ge J, He YB, Gu L, Zhang H. Synthesis of PdM (M = Zn, Cd, ZnCd) Nanosheets with an Unconventional Face-Centered Tetragonal Phase as Highly Efficient Electrocatalysts for Ethanol Oxidation. ACS NANO 2019; 13:14329-14336. [PMID: 31774269 DOI: 10.1021/acsnano.9b07775] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Recently, crystal-phase engineering has been emerging as a promising strategy to tune the physicochemical properties of noble metal catalysts and further improve their catalytic performance. However, the synthesis of noble metal catalysts with an unconventional crystal phase as well as desired composition and morphology still remains a great challenge. Herein, a series of PdM (M = Zn, Cd, ZnCd) nanosheets (NSs) with thickness less than 5 nm have been synthesized via a facile one-pot wet-chemical method. In particular, different from the conventional face-centered cubic (fcc) phase, PdM NSs possess an unconventional face-centered tetragonal (fct) phase. As a proof-of-concept application, the fct PdZn NSs exhibit significantly enhanced mass activity and stability in ethanol oxidation reaction, compared to the pure Pd NSs and commercial Pd black catalyst.
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Affiliation(s)
- Qinbai Yun
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
- Institute for Sports Research , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Qipeng Lu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
- School of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , China
| | - Cuiling Li
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
- Key Laboratory of Cluster Science, Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Bo Chen
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Qinghua Zhang
- Institute of Physics, Beijing National Laboratory for Condensed Matter Physics , Chinese Academy of Sciences , Beijing 100190 , China
| | - Qiyuan He
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Zhaoning Hu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Zhicheng Zhang
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Yiyao Ge
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Nailiang Yang
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering , Chinese Academy of Sciences , No. 1 Beiertiao , Zhongguancun, Beijing 100190 , China
| | - Jingjie Ge
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Yan-Bing He
- Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School , Tsinghua University , Shenzhen 518055 , China
| | - Lin Gu
- Institute of Physics, Beijing National Laboratory for Condensed Matter Physics , Chinese Academy of Sciences , Beijing 100190 , China
- School of Physical Sciences , University of Chinese Academy of Sciences , Beijing 100049 , China
- Collaborative Innovation Center of Quantum Matter , Beijing 100190 , China
| | - Hua Zhang
- Department of Chemistry , City University of Hong Kong , Kowloon , Hong Kong, China
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
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Torimoto M, Ogo S, Harjowinoto D, Higo T, Seo JG, Furukawa S, Sekine Y. Enhanced methane activation on diluted metal–metal ensembles under an electric field: breakthrough in alloy catalysis. Chem Commun (Camb) 2019; 55:6693-6695. [DOI: 10.1039/c9cc02794g] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Synergy between an electric field and Pd–Zn alloy allows improved catalytic activities in the steam reforming of methane.
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Affiliation(s)
- Maki Torimoto
- Department of Applied Chemistry, Waseda University
- Tokyo
- Japan
| | - Shuhei Ogo
- Department of Applied Chemistry, Waseda University
- Tokyo
- Japan
| | | | - Takuma Higo
- Department of Applied Chemistry, Waseda University
- Tokyo
- Japan
| | - Jeong Gil Seo
- Department of Applied Chemistry, Waseda University
- Tokyo
- Japan
- Department of Energy Science and Technology, Myongji University
- South Korea
| | - Shinya Furukawa
- Institute for Catalysts, Hokkaido University
- Sapporo
- Japan
- Elementary Strategy Initiative for Catalysis and Battery, Kyoto University, Kyoto Daigaku Katsura
- Kyoto
| | - Yasushi Sekine
- Department of Applied Chemistry, Waseda University
- Tokyo
- Japan
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