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Han X, Yang Y, Chen R, Zhou J, Yang X, Wang X, Ji H. One-dimensional Ga 2O 3-Al 2O 3 nanofibers with unsaturated coordination Ga: Catalytic dehydrogenation of propane under CO 2 atmosphere with excellent stability. J Colloid Interface Sci 2024; 666:76-87. [PMID: 38583212 DOI: 10.1016/j.jcis.2024.03.171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 03/20/2024] [Accepted: 03/26/2024] [Indexed: 04/09/2024]
Abstract
The pressing demand for propylene has spurred intensive research on the catalytic dehydrogenation of propane to produce propylene. Gallium-based catalysts are regarded as highly promising due to their exceptional dehydrogenation activity in the presence of CO2. However, the inherent coking issue associated with high temperature reactions poses a constraint on the stability development of this process. In this study, we employed the electrospinning method to prepare a range of Ga2O3-Al2O3 mixed oxide one-dimensional nanofiber catalysts with varying molar ratios for CO2 oxidative dehydrogenation of propane (CO2-OPDH). The propane conversion was up to 48.4 % and the propylene selectivity was high as 96.8 % at 500 °C, the ratio of propane to carbon dioxide is 1:2. After 100 h of reaction, the catalyst still maintains approximately 10 % conversion and exhibits a propylene selectivity of around 98 %. The electrospinning method produces one-dimensional nanostructures with a larger specific surface area, unique multi-stage pore structure and low-coordinated Ga3+, which enhances mass transfer and accelerates reaction intermediates. This results in less coking and improved catalyst stability. The high activity of the catalyst is attributed to an abundance of low-coordinated Ga3+ ions associated with weak/medium-strong Lewis acid centers. In situ infrared analysis reveals that the reaction mechanism involves a two-step dehydrogenation via propane isocleavage, with the second dehydrogenation of Ga-OR at the metal-oxygen bond being the decisive speed step.
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Affiliation(s)
- Xue Han
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China, 530004
| | - Yun Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China, 510275
| | - Rui Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China, 510275
| | - Jiaqi Zhou
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China, 510275
| | - Xupeng Yang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China, 510275
| | - Xuyu Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China, 510275.
| | - Hongbing Ji
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, China, 530004; School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, China, 510275; State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Institute of Green Petroleum Processing and Light Hydrocarbon Conversion, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China, 310014.
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2
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Hao R, Deng Y, Fang J, Zhao D. Three-Dimensionally Nanometallic Superstructure Synthesized via a Single-Particle Soft-Enveloping Strategy. NANO LETTERS 2024; 24:4554-4561. [PMID: 38573122 DOI: 10.1021/acs.nanolett.4c00608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Three-dimensionally (3D) integrated metallic nanomaterials composed of two or more different types of nanostructures make up a class of advanced materials due to the multidimensional and synergistic effects between different components. However, designing and synthesizing intricate, well-defined metallic 3D nanomaterials remain great challenges. Here, a novel single-particle soft-enveloping strategy using a core-shell Au NP@mSiO2 particle as a template was proposed to synthesize 3D nanomaterials, namely, a Au nanoparticle@center-radial nanorod-Au-Pt nanoparticle (Au NP@NR-NP-Pt NP) superstructure. Taking advantage of the excellent plasmonic properties of Au NP@NR-NP by the synergistic plasmonic coupling of the outer Au NPs and inner Au nanorods, we can enhance the catalytic performance for 4-nitrophenol hydrogenation using Au NP@NR-NP-Pt NP as a photocatalyst with plasmon-excited hot electrons from Au NP@NR-NP under light irradiation, which is 2.76 times higher than in the dark. This process opens a door for the design of a new generation of 3D metallic nanomaterials for different fields.
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Affiliation(s)
- Rui Hao
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China
| | - Yonghui Deng
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Jixiang Fang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China
| | - Dongyuan Zhao
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
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3
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Xing F, Furukawa S. Metallic Catalysts for Oxidative Dehydrogenation of Propane Using CO 2. Chemistry 2023; 29:e202202173. [PMID: 36184570 DOI: 10.1002/chem.202202173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Indexed: 11/23/2022]
Abstract
The oxidative dehydrogenation of propane using CO2 (CO2 -ODP) is a promising technique for realizing high-yield propylene production and CO2 usage. Developing a highly efficient catalyst for CO2 -ODP is essential and beneficial to the chemical industry and for realizing net-zero emissions. Many studies have investigated metal oxide-based catalysts, revealing that rapid deactivation and low selectivity remain limiting factors for their industrial applications. In recent years, metallic nanoparticle catalysts have become increasingly attractive due to their unique properties. Therefore, we summarize the performance of metal-based catalysts in CO2 -ODP reactions by considering catalyst design concepts, different mechanisms in the reaction process, and the role of CO2 .
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Affiliation(s)
- Feilong Xing
- Institute for Catalysis, Hokkaido University N-21, W-10, Sapporo, 001-0021, Japan
| | - Shinya Furukawa
- Institute for Catalysis, Hokkaido University N-21, W-10, Sapporo, 001-0021, Japan.,Department of Research Promotion, Japan Science and Technology Agency Chiyoda, Tokyo, 102-0076, Japan
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4
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The role of monomeric VOx supported on anatase in catalytic dehydrogenation of n-octane assisted by CO2 addition. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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The nature of VOx structures in HMS supported vanadium catalysts for non-oxidative propane dehydrogenation. J Catal 2022. [DOI: 10.1016/j.jcat.2022.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Structural regulation and polishing performance of dendritic mesoporous silica (D-mSiO2) supported with samarium-doped cerium oxide composites. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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7
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Shan YL, Sun HL, Zhao SL, Tang PL, Zhao WT, Ding JW, Yu WL, Li LN, Feng X, Chen D. Effects of Support and CO 2 on the Performances of Vanadium Oxide-Based Catalysts in Propane Dehydrogenation. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00878] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu-Ling Shan
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Huai-Lu Sun
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shi-Lei Zhao
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Pei-Long Tang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Wen-Ting Zhao
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jun-Wei Ding
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Wen-Long Yu
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Li-Na Li
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Shanghai 201204, China
| | - Xiang Feng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim N-7491, Norway
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8
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Xie Z, Zhang X, Zhao J, Wang L, Fan X, Kong L, Song Y, Zhao Z. Design and Synthesis of Vanadium‐Titanium‐Incorporated Mesoporous Silica Catalysts for the Oxidative Dehydrogenation of Propane. ChemistrySelect 2022. [DOI: 10.1002/slct.202104405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zean Xie
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Xiao Zhang
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Jin Zhao
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Lu Wang
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Xiaoqiang Fan
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Lian Kong
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Yangyang Song
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
| | - Zhen Zhao
- Institute of Catalysis for Energy and Environment Shenyang Normal University Shenyang 110034 China
- State Key Laboratory of Heavy Oil Processing China University of Petroleum, Chang Ping Beijing 102249 China
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9
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Wang ZY, He ZH, Li LY, Yang SY, He MX, Sun YC, Wang K, Chen JG, Liu ZT. Research progress of CO 2 oxidative dehydrogenation of propane to propylene over Cr-free metal catalysts. RARE METALS 2022; 41:2129-2152. [PMID: 35291268 PMCID: PMC8913863 DOI: 10.1007/s12598-021-01959-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/13/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
CO2-assisted oxidative dehydrogenation of propane (CO2-ODHP) is an attractive strategy to offset the demand gap of propylene due to its potentiality of reducing CO2 emissions, especially under the demands of peaking CO2 emissions and carbon neutrality. The introduction of CO2 as a soft oxidant into the reaction not only averts the over-oxidation of products, but also maintains the high oxidation state of the redox-active sites. Furthermore, the presence of CO2 increases the conversion of propane by coupling the dehydrogenation of propane (DHP) with the reverse water gas reaction (RWGS) and inhibits the coking formation to prolong the lifetime of catalysts via the reverse Boudouard reaction. An effective catalyst should selectively activate the C-H bond but suppress the C-C cleavage. However, to prepare such a catalyst remains challenging. Chromium-based catalysts are always applied in industrial application of DHP; however, their toxic properties are harmful to the environment. In this aspect, exploring environment-friendly and sustainable catalytic systems with Cr-free is an important issue. In this review, we outline the development of the CO2-ODHP especially in the last ten years, including the structural information, catalytic performances, and mechanisms of chromium-free metal-based catalyst systems, and the role of CO2 in the reaction. We also present perspectives for future progress in the CO2-ODHP.
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Affiliation(s)
- Zhong-Yu Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 China
| | - Zhen-Hong He
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 China
| | - Long-Yao Li
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119 China
| | - Shao-Yan Yang
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119 China
| | - Meng-Xin He
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 China
| | - Yong-Chang Sun
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 China
| | - Kuan Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 China
| | - Jian-Gang Chen
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119 China
| | - Zhao-Tie Liu
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an, 710021 China
- School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119 China
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10
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Abstract
Methane is an abundant resource and its direct conversion into value-added chemicals has been an attractive subject for its efficient utilization. This method can be more efficient than the present energy-intensive indirect conversion of methane via syngas, a mixture of CO and H2. Among the various approaches for direct methane conversion, the selective oxidation of methane into methane oxygenates (e.g., methanol and formaldehyde) is particularly promising because it can proceed at low temperatures. Nevertheless, due to low product yields this method is challenging. Compared with the liquid-phase partial oxidation of methane, which frequently demands for strong oxidizing agents in protic solvents, gas-phase selective methane oxidation has some merits, such as the possibility of using oxygen as an oxidant and the ease of scale-up owing to the use of heterogeneous catalysts. Herein, we summarize recent advances in the gas-phase partial oxidation of methane into methane oxygenates, focusing mainly on its conversion into formaldehyde and methanol.
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11
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Wang L, Yang GQ, Ren X, Liu ZW. CeO 2-Promoted PtSn/SiO 2 as a High-Performance Catalyst for the Oxidative Dehydrogenation of Propane with Carbon Dioxide. NANOMATERIALS 2022; 12:nano12030417. [PMID: 35159762 PMCID: PMC8838316 DOI: 10.3390/nano12030417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 01/14/2022] [Accepted: 01/25/2022] [Indexed: 02/01/2023]
Abstract
The oxidative dehydrogenation of propane with CO2 (CO2-ODP) has been extensively investigated as a promising green technology for the efficient production of propylene, but the lack of a high-performance catalyst is still one of the main challenges for its industrial application. In this work, an efficient catalyst for CO2-ODP was developed by adding CeO2 to PtSn/SiO2 as a promoter via the simple impregnation method. Reaction results indicate that the addition of CeO2 significantly improved the catalytic activity and propylene selectivity of the PtSn/SiO2 catalyst, and the highest space-time yield of 1.75 g(C3H6)·g(catalyst)-1·h-1 was achieved over PtSn/SiO2 with a Ce loading of 6 wt%. The correlation of the reaction results with the characterization data reveals that the introduction of CeO2 into PtSn/SiO2 not only improved the Pt dispersion but also regulated the interaction between Pt and Sn species. Thus, the essential reason for the promotional effect of CeO2 on CO2-ODP performance was rationally ascribed to the enhanced adsorption of propane and CO2 originating from the rich oxygen defects of CeO2. These important understandings are applicable in further screening of promoters for the development of a high-performance Pt-based catalyst for CO2-ODP.
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12
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Yu X, Williams CT. Recent Advances in the Applications of Mesoporous Silica in Heterogenous Catalysis. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00001f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mesoporous silica is a class of silica material with a large specific surface area, high specific pore volume and meso-sized pores. These properties make mesoporous silica a good choice of...
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13
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Yang GQ, He YJ, Song YH, Wang J, Liu ZT, Liu ZW. Oxidative Dehydrogenation of Propane with Carbon Dioxide Catalyzed by Zn xZr 1–xO 2–x Solid Solutions. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03476] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guo-Qing Yang
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Ya-Jiao He
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Yong-Hong Song
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Jian Wang
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Zhao-Tie Liu
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Zhong-Wen Liu
- Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
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14
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Duan L, Wang C, Zhang W, Ma B, Deng Y, Li W, Zhao D. Interfacial Assembly and Applications of Functional Mesoporous Materials. Chem Rev 2021; 121:14349-14429. [PMID: 34609850 DOI: 10.1021/acs.chemrev.1c00236] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Functional mesoporous materials have gained tremendous attention due to their distinctive properties and potential applications. In recent decades, the self-assembly of micelles and framework precursors into mesostructures on the liquid-solid, liquid-liquid, and gas-liquid interface has been explored in the construction of functional mesoporous materials with diverse compositions, morphologies, mesostructures, and pore sizes. Compared with the one-phase solution synthetic approach, the introduction of a two-phase interface in the synthetic system changes self-assembly behaviors between micelles and framework species, leading to the possibility for the on-demand fabrication of unique mesoporous architectures. In addition, controlling the interfacial tension is critical to manipulate the self-assembly process for precise synthesis. In particular, recent breakthroughs based on the concept of the "monomicelles" assembly mechanism are very promising and interesting for the synthesis of functional mesoporous materials with the precise control. In this review, we highlight the synthetic strategies, principles, and interface engineering at the macroscale, microscale, and nanoscale for oriented interfacial assembly of functional mesoporous materials over the past 10 years. The potential applications in various fields, including adsorption, separation, sensors, catalysis, energy storage, solar cells, and biomedicine, are discussed. Finally, we also propose the remaining challenges, possible directions, and opportunities in this field for the future outlook.
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Affiliation(s)
- Linlin Duan
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
| | - Changyao Wang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
| | - Wei Zhang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
| | - Bing Ma
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
| | - Yonghui Deng
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
| | - Wei Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
| | - Dongyuan Zhao
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P.R. China
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15
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Gu Q, Zhang K, Jiang P, Shen Y, Leng Y, Zhang P, Wai PT. A dual-templating strategy for synthesis of Bi2WO6 with oxygen vacancies for enhanced light-driven photocatalytic oxidation alcohol. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Le D, Chaidherasuwet N, Rueangthaweep A, Kulsing C, Hinchiranan N. Long-chain bio-olefins production via oxidative dehydrogenation of oleic acid over vanadium oxides/KIT-6 catalysts. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.07.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Sui R, Charpentier PA, Marriott RA. Metal Oxide-Related Dendritic Structures: Self-Assembly and Applications for Sensor, Catalysis, Energy Conversion and Beyond. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1686. [PMID: 34199059 PMCID: PMC8308120 DOI: 10.3390/nano11071686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/14/2021] [Accepted: 06/24/2021] [Indexed: 11/16/2022]
Abstract
In the past two decades, we have learned a great deal about self-assembly of dendritic metal oxide structures, partially inspired by the nanostructures mimicking the aesthetic hierarchical structures of ferns and corals. The self-assembly process involves either anisotropic polycondensation or molecular recognition mechanisms. The major driving force for research in this field is due to the wide variety of applications in addition to the unique structures and properties of these dendritic nanostructures. Our purpose of this minireview is twofold: (1) to showcase what we have learned so far about how the self-assembly process occurs; and (2) to encourage people to use this type of material for drug delivery, renewable energy conversion and storage, biomaterials, and electronic noses.
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Affiliation(s)
- Ruohong Sui
- Department of Chemistry, University of Calgary, Calgary, AB T2L 2K8, Canada
| | - Paul A. Charpentier
- Department of Chemical and Biochemical Engineering, Western University, London, ON N6A 5B9, Canada;
| | - Robert A. Marriott
- Department of Chemistry, University of Calgary, Calgary, AB T2L 2K8, Canada
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18
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Zhang JB, He HH, Tian HF, Liao JK, Zha F, Guo XJ, Tang X, Chang Y. Coupling of propane with CO 2 to propylene over Zn-promoted In/HZSM-5 catalyst. CAN J CHEM 2021. [DOI: 10.1139/cjc-2020-0495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The ZnIn/HZSM-5 catalyst was prepared by the wetness impregnation method, and the structure of catalyst was characterized by XRD, SEM, TEM, H2-TPR, NH3-TPD, XPS, TG, and N2 adsorption–desorption and then investigated in the coupling of propane with CO2 to propylene. It is found that the addition of Zn species is beneficial to the dispersion of In2O3 over HZSM-5, which plays an important role in propene formation, and adjusts the acidity distribution of In/HZSM-5 catalyst, as well as significantly improves the activity of In/HZSM-5 catalyst. The selectivity of propylene is 68.21% in the coupling of propane with CO2 over ZnIn/HZSM-5 catalyst when the time on stream (TOS) is 2 h, reaction temperature is 580 °C, reaction pressure is 0.3 MPa, C3H6:CO2:N2 = 1:4:5, catalyst mass is 0.2 g, and space velocity is 6000 mL gcat−1 h−1. However, the selectivity of propylene is only 63.33% and 0.25% in the propane dehydrogenation or CO2 hydrogenation reaction, respectively. The ZnIn/HZSM-5 catalyst showed a higher stability with only 0.80% conversion drop after three cycles.
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Affiliation(s)
- Jian-bin Zhang
- School of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741000, China
| | - Huan-huan He
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Hai-Feng Tian
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Jian-Kang Liao
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Fei Zha
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Xiao-Jun Guo
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - XiaoHua Tang
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Yue Chang
- College of Chemical & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Lanzhou 730070, China
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19
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Chang QY, Wang KQ, Sui ZJ, Zhou XG, Chen D, Yuan WK, Zhu YA. Rational Design of Single-Atom-Doped Ga 2O 3 Catalysts for Propane Dehydrogenation: Breaking through Volcano Plot by Lewis Acid–Base Interactions. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05454] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qing-Yu Chang
- UNILAB, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kai-Qi Wang
- UNILAB, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhi-Jun Sui
- UNILAB, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xing-Gui Zhou
- UNILAB, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Wei-Kang Yuan
- UNILAB, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yi-An Zhu
- UNILAB, State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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20
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Effects of alumina phases on the structure and performance of VOx/Al2O3 catalysts in non-oxidative propane dehydrogenation. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111466] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Jiang X, Sharma L, Fung V, Park SJ, Jones CW, Sumpter BG, Baltrusaitis J, Wu Z. Oxidative Dehydrogenation of Propane to Propylene with Soft Oxidants via Heterogeneous Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.0c03999] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Jiang
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Lohit Sharma
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Victor Fung
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sang Jae Park
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Bobby G. Sumpter
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jonas Baltrusaitis
- Department of Chemical & Biomolecular Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Zili Wu
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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22
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23
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Otroshchenko T, Jiang G, Kondratenko VA, Rodemerck U, Kondratenko EV. Current status and perspectives in oxidative, non-oxidative and CO2-mediated dehydrogenation of propane and isobutane over metal oxide catalysts. Chem Soc Rev 2021; 50:473-527. [DOI: 10.1039/d0cs01140a] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conversion of propane or isobutane from natural/shale gas into propene or isobutene, which are indispensable for the synthesis of commodity chemicals, is an important environmentally friendly alternative to oil-based cracking processes.
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Affiliation(s)
| | - Guiyuan Jiang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum, Beijing
- Beijing
- P. R. China
| | | | - Uwe Rodemerck
- Leibniz-Institut für Katalyse e.V
- D-18059 Rostock
- Germany
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24
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Tao L, Choksi TS, Liu W, Pérez-Ramírez J. Synthesizing High-Volume Chemicals from CO 2 without Direct H 2 Input. CHEMSUSCHEM 2020; 13:6066-6089. [PMID: 32946662 DOI: 10.1002/cssc.202001604] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/07/2020] [Indexed: 06/11/2023]
Abstract
Decarbonizing the chemical industry will eventually entail using CO2 as a feedstock for chemical synthesis. However, many chemical syntheses involve CO2 reduction using inputs such as renewable hydrogen. In this review, chemical processes are discussed that use CO2 as an oxidant for upgrading hydrocarbon feedstocks. The captured CO2 is inherently reduced by the hydrocarbon co-reactants without consuming molecular hydrogen or renewable electricity. This CO2 utilization approach can be potentially applied to synthesize eight emission-intensive molecules, including olefins and epoxides. Catalytic systems and reactor concepts are discussed that can overcome practical challenges, such as thermodynamic limitations, over-oxidation, coking, and heat management. Under the best-case scenario, these hydrogen-free CO2 reduction processes have a combined CO2 abatement potential of approximately 1 gigatons per year and avoid the consumption of 1.24 PWh renewable electricity, based on current market demand and supply.
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Affiliation(s)
- Longgang Tao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Tej S Choksi
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Wen Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Javier Pérez-Ramírez
- Institute of Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg, 1, 8093, Zurich, Switzerland
- Department of Chemical, Biomolecular Engineering National University Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
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25
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Kaiser SK, Chen Z, Faust Akl D, Mitchell S, Pérez-Ramírez J. Single-Atom Catalysts across the Periodic Table. Chem Rev 2020; 120:11703-11809. [PMID: 33085890 DOI: 10.1021/acs.chemrev.0c00576] [Citation(s) in RCA: 347] [Impact Index Per Article: 86.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Isolated atoms featuring unique reactivity are at the heart of enzymatic and homogeneous catalysts. In contrast, although the concept has long existed, single-atom heterogeneous catalysts (SACs) have only recently gained prominence. Host materials have similar functions to ligands in homogeneous catalysts, determining the stability, local environment, and electronic properties of isolated atoms and thus providing a platform for tailoring heterogeneous catalysts for targeted applications. Within just a decade, we have witnessed many examples of SACs both disrupting diverse fields of heterogeneous catalysis with their distinctive reactivity and substantially enriching our understanding of molecular processes on surfaces. To date, the term SAC mostly refers to late transition metal-based systems, but numerous examples exist in which isolated atoms of other elements play key catalytic roles. This review provides a compositional encyclopedia of SACs, celebrating the 10th anniversary of the introduction of this term. By defining single-atom catalysis in the broadest sense, we explore the full elemental diversity, joining different areas across the whole periodic table, and discussing historical milestones and recent developments. In particular, we examine the coordination structures and associated properties accessed through distinct single-atom-host combinations and relate them to their main applications in thermo-, electro-, and photocatalysis, revealing trends in element-specific evolution, host design, and uses. Finally, we highlight frontiers in the field, including multimetallic SACs, atom proximity control, and possible applications for multistep and cascade reactions, identifying challenges, and propose directions for future development in this flourishing field.
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Affiliation(s)
- Selina K Kaiser
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Zupeng Chen
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Dario Faust Akl
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Sharon Mitchell
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
| | - Javier Pérez-Ramírez
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093 Zurich, Switzerland
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26
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Zhang W, Zhao G, Muschin T, Bao A. Nitrogen‐doped mesoporous carbon materials for oxidative dehydrogenation of propane. SURF INTERFACE ANAL 2020. [DOI: 10.1002/sia.6883] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wunengerile Zhang
- Inner Mongolia Key Laboratory of Green Catalysis, College of Chemistry and Environmental Science Inner Mongolia Normal University Hohhot 010022 China
| | - Gegerile Zhao
- Inner Mongolia Key Laboratory of Green Catalysis, College of Chemistry and Environmental Science Inner Mongolia Normal University Hohhot 010022 China
| | - Tegshi Muschin
- Inner Mongolia Key Laboratory of Green Catalysis, College of Chemistry and Environmental Science Inner Mongolia Normal University Hohhot 010022 China
| | - Agula Bao
- Inner Mongolia Key Laboratory of Green Catalysis, College of Chemistry and Environmental Science Inner Mongolia Normal University Hohhot 010022 China
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27
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Li J, Li M, Wang S, Yang X, Liu F, Liu X. Key role of pore size in Cr(VI) removal by the composites of 3-dimentional mesoporous silica nanospheres wrapped with polyaniline. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 729:139009. [PMID: 32380329 DOI: 10.1016/j.scitotenv.2020.139009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
A series of three-dimensional silica nanospheres with different pore sizes was synthesized in a biphasic oil-water system and their pore dimensions were adjusted by controlling the composition of the oil phase. The silica nanospheres were then wrapped with polyaniline, characterized, and the obtained silica nanosphere-polyaniline composites were used for the removal of Cr(VI). Polyaniline was generated by the polymerization of aniline. The mesoporous silica has sufficient dendritic pore channels and offers a large contact surface for the polymerization of aniline. Furthermore, the mesoporous silica nanospheres are beneficial for dispersing polyaniline and transferring aqueous Cr(VI). The silica nanosphere-polyaniline composite with the largest pore size (~15.4 nm) showed the best Cr(VI) removal performance. We also investigated the kinetic characteristics and the result could be fitted to the pseudo-second-order kinetic model. Moreover, we demonstrate that the composites maintain a high Cr(VI) removal efficiency compared to other anions (H2PO4-, SO42-, etc.), indicating their good prospect in practical wastewater treatment. Remarkably, the silica-polyaniline composites showed enhanced Cr(VI) removal efficiency under UV-irradiation. The effects of electrons and H+ on Cr(VI) reduction are also discussed based on the results of UV-vis and X-ray photoelectron spectroscopic studies and bath experiments (influence of pH on adsorption capacity). Mechanistic studies indicate that the Cr(VI) removal occurs in two stages-adsorption and reduction. The negatively charged aqueous Cr(VI) species first interact with the positively charged protonated amine groups via electrostatic attraction, and are then further reduced to less-toxic Cr(III) by the electrons and H+ donated by the amine groups on polyaniline.
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Affiliation(s)
- Jiacheng Li
- School of Environment, Tsinghua University, Hai Dian Distract, Beijing 100084, China
| | - Miao Li
- School of Environment, Tsinghua University, Hai Dian Distract, Beijing 100084, China.
| | - Sai Wang
- School of Environment, Tsinghua University, Hai Dian Distract, Beijing 100084, China
| | - Xu Yang
- School of Environment, Tsinghua University, Hai Dian Distract, Beijing 100084, China
| | - Fang Liu
- School of Environment, Tsinghua University, Hai Dian Distract, Beijing 100084, China
| | - Xiang Liu
- School of Environment, Tsinghua University, Hai Dian Distract, Beijing 100084, China
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28
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Tian H, Liao J, Zha F, Guo X, Tang X, Chang Y, Ma X. Catalytic Performance of In/HZSM‐5 for Coupling Propane with CO
2
to Propylene. ChemistrySelect 2020. [DOI: 10.1002/slct.202000497] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Haifeng Tian
- College of Chemical & Chemical EngineeringNorthwest Normal University Lanzhou 730070 China
| | - Jiankang Liao
- College of Chemical & Chemical EngineeringNorthwest Normal University Lanzhou 730070 China
| | - Fei Zha
- College of Chemical & Chemical EngineeringNorthwest Normal University Lanzhou 730070 China
| | - Xiaojun Guo
- College of Chemical & Chemical EngineeringNorthwest Normal University Lanzhou 730070 China
| | - Xiaohua Tang
- College of Chemical & Chemical EngineeringNorthwest Normal University Lanzhou 730070 China
| | - Yue Chang
- College of Chemical & Chemical EngineeringNorthwest Normal University Lanzhou 730070 China
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education Lanzhou 730070 China
| | - Xiaoxun Ma
- College of Chemical EngineeringNorthwest University Xi'an 710069 China
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29
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Michorczyk P, Zeńczak-Tomera K, Michorczyk B, Węgrzyniak A, Basta M, Millot Y, Valentin L, Dzwigaj S. Effect of dealumination on the catalytic performance of Cr-containing Beta zeolite in carbon dioxide assisted propane dehydrogenation. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2019.09.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Chen C, Sun M, Hu Z, Liu Y, Zhang S, Yuan ZY. Nature of active phase of VO catalysts supported on SiBeta for direct dehydrogenation of propane to propylene. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63444-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Vieira LH, Possato LG, Chaves TF, Lee JJ, Sulmonetti TP, Jones CW, Martins L. Insights into Redox Dynamics of Vanadium Species Impregnated in Layered Siliceous Zeolitic Structures during Methanol Oxidation Reactions. ChemCatChem 2020. [DOI: 10.1002/cctc.201901567] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Luiz H. Vieira
- Instituto de QuímicaUniversidade Estadual Paulista – UNESP R. Prof. Francisco Degni, 55 Quitandinha SP 14800-900 Brazil
- School of Chemical & Biomolecular EngineeringGeorgia Institute of Technology 311 Ferst Drive NW Atlanta GA 30332 USA
| | - Luiz G. Possato
- Instituto de QuímicaUniversidade Estadual Paulista – UNESP R. Prof. Francisco Degni, 55 Quitandinha SP 14800-900 Brazil
| | - Thiago F. Chaves
- Instituto de QuímicaUniversidade Estadual Paulista – UNESP R. Prof. Francisco Degni, 55 Quitandinha SP 14800-900 Brazil
| | - Jason J. Lee
- School of Chemical & Biomolecular EngineeringGeorgia Institute of Technology 311 Ferst Drive NW Atlanta GA 30332 USA
| | - Taylor P. Sulmonetti
- School of Chemical & Biomolecular EngineeringGeorgia Institute of Technology 311 Ferst Drive NW Atlanta GA 30332 USA
| | - Christopher W. Jones
- School of Chemical & Biomolecular EngineeringGeorgia Institute of Technology 311 Ferst Drive NW Atlanta GA 30332 USA
| | - Leandro Martins
- Instituto de QuímicaUniversidade Estadual Paulista – UNESP R. Prof. Francisco Degni, 55 Quitandinha SP 14800-900 Brazil
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Rodriguez-Gomez A, Chowdhury AD, Caglayan M, Bau JA, Abou-Hamad E, Gascon J. Non-oxidative dehydrogenation of isobutane over supported vanadium oxide: nature of the active sites and coke formation. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01174f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We combine Raman spectroscopy, EPR, XPS, temperature programmed reduction, XRD, 51V MAS ssNMR, TEM and N2-physisorption to unravel structure–activity relationships during the non-oxidative dehydrogenation of isobutane over a V based catalyst.
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Affiliation(s)
- Alberto Rodriguez-Gomez
- KAUST Catalysis Center (KCC)
- Advanced Catalytic Materials
- King Abdullah University of Science and Technology
- Thuwal 23955
- Saudi Arabia
| | - Abhishek Dutta Chowdhury
- KAUST Catalysis Center (KCC)
- Advanced Catalytic Materials
- King Abdullah University of Science and Technology
- Thuwal 23955
- Saudi Arabia
| | - Mustafa Caglayan
- KAUST Catalysis Center (KCC)
- Advanced Catalytic Materials
- King Abdullah University of Science and Technology
- Thuwal 23955
- Saudi Arabia
| | - Jeremy A. Bau
- KAUST Catalysis Center (KCC)
- Advanced Catalytic Materials
- King Abdullah University of Science and Technology
- Thuwal 23955
- Saudi Arabia
| | - Edy Abou-Hamad
- Core Labs
- King Abdullah University of Science and Technology
- Thuwal 23955
- Saudi Arabia
| | - Jorge Gascon
- KAUST Catalysis Center (KCC)
- Advanced Catalytic Materials
- King Abdullah University of Science and Technology
- Thuwal 23955
- Saudi Arabia
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33
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Zhang R, Yang X, Tao Z, Wang X, Wang H, Wang L, Lv B. Insight into the Effective Aerobic Oxidative Cross-Esterification of Alcohols over Au/Porous Boron Nitride Catalyst. ACS APPLIED MATERIALS & INTERFACES 2019; 11:46678-46687. [PMID: 31747750 DOI: 10.1021/acsami.9b14460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Boron nitride (BN) has attracted great attention with an unexpected ability in aerobic catalysis. Still, its related probe reactions are relatively rare, and the effect of the BN-supported metal catalyst on O2 activation is still ambiguous, and opinions are varied. In this work, the porous BN (pBN)-supported Au catalyst with a porous structure and exposed edges exhibits high activity in the oxidative cross-esterification reactions between the aromatic and C1-C3 aliphatic alcohols at ambient temperature. The turnover frequency value for methyl benzoate is 118 h-1 at 30 °C, and the calculated apparent activation energy (Ea, 58 kJ/mol) is comparable to that of AuPd/TiO2, Ru/Al2O3, and PdBiTe catalysts. Combined with temperature-programmed desorption (TPD) results, the loading of Au enhances the desorption of O2 and the interaction with alcohols; thus, a synergistic effect between the O-rich pBN and Au is considered. The free-radical scavenger can dramatically suppress the conversion (∼6%), suggesting that the reaction proceeds via the O2* radicals. According to the vibration of νO-O, δOO-H, and νB-O-O-B detected by attenuated total reflectance-infrared spectroscopy (ATR-IR), we are prone to consider the oxygen activation route by the edge B atoms. Then, a possible L-H reaction mechanism was proposed: benzyl alcohol and O2 adsorb on the Au/pBN initially, then O2 is converted to O2*, and the α-H elimination proceeds; as the semi-acetal formed, another α-H elimination proceeds and methyl benzoate is finally formed.
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Affiliation(s)
- Rong Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xi Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
- Department of Chemistry , Shanghai University , Shanghai 200444 , China
| | - Zheng Tao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
| | - Xiao Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
| | - Huixiang Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
| | - Liancheng Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
| | - Baoliang Lv
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , China
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Samantaray MK, D'Elia V, Pump E, Falivene L, Harb M, Ould Chikh S, Cavallo L, Basset JM. The Comparison between Single Atom Catalysis and Surface Organometallic Catalysis. Chem Rev 2019; 120:734-813. [PMID: 31613601 DOI: 10.1021/acs.chemrev.9b00238] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Single atom catalysis (SAC) is a recent discipline of heterogeneous catalysis for which a single atom on a surface is able to carry out various catalytic reactions. A kind of revolution in heterogeneous catalysis by metals for which it was assumed that specific sites or defects of a nanoparticle were necessary to activate substrates in catalytic reactions. In another extreme of the spectrum, surface organometallic chemistry (SOMC), and, by extension, surface organometallic catalysis (SOMCat), have demonstrated that single atoms on a surface, but this time with specific ligands, could lead to a more predictive approach in heterogeneous catalysis. The predictive character of SOMCat was just the result of intuitive mechanisms derived from the elementary steps of molecular chemistry. This review article will compare the aspects of single atom catalysis and surface organometallic catalysis by considering several specific catalytic reactions, some of which exist for both fields, whereas others might see mutual overlap in the future. After a definition of both domains, a detailed approach of the methods, mostly modeling and spectroscopy, will be followed by a detailed analysis of catalytic reactions: hydrogenation, dehydrogenation, hydrogenolysis, oxidative dehydrogenation, alkane and cycloalkane metathesis, methane activation, metathetic oxidation, CO2 activation to cyclic carbonates, imine metathesis, and selective catalytic reduction (SCR) reactions. A prospective resulting from present knowledge is showing the emergence of a new discipline from the overlap between the two areas.
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Affiliation(s)
- Manoja K Samantaray
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Valerio D'Elia
- School of Molecular Science and Engineering (MSE) , Vidyasirimedhi Institute of Science and Technology (VISTEC) , Wang Chan, Payupnai , 21210 Rayong , Thailand
| | - Eva Pump
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Laura Falivene
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Moussab Harb
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Samy Ould Chikh
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Luigi Cavallo
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
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36
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Hu D, Duan A, Xu C, Zheng P, Li Y, Xiao C, Liu C, Meng Q, Li H. Ni 2P promotes the hydrogenation activity of naphthalene on wrinkled silica nanoparticles with tunable hierarchical pore sizes in a large range. NANOSCALE 2019; 11:15519-15529. [PMID: 31393491 DOI: 10.1039/c9nr02597a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, a series of wrinkled silica nanoparticles with hierarchical pore (HPWSNs) supports were successfully prepared by dual-templating, and the special wrinkle pore structures in the monodisperse HPWSN samples were found to be beneficial for reducing the diffusion resistance of macromolecular aromatic compounds and achieving high dispersion of Ni2P active phases. Moreover, the distance between wrinkles in silica nanoparticles could be easily tuned by changing the ratios of SDS/CTAB through charge-reversed interactions. It was found that the Ni2P/HPWSNs-0.13 catalyst with smallest Ni2P particles had highest surface area and biggest pore volume. Furthermore, the Ni2P/HPWSNs-0.13 catalyst exhibited highest naphthalene hydrogenation conversion as well as 99.9% selectivity to decalin at 320 °C. To correlate the internal relationship between the macroscopic catalytic performance in the experiment and the atomic chemistry in the microscopic point of view, DFT calculations were performed, and the results showed that stronger adsorptions of naphthalene and tetralin occurred over the Ni(2) sites than those over the Ni(1) sites. Therefore, it can be concluded that the superior catalytic activity of the Ni2P/HPWSNs-0.13 catalyst is due to the synergistic effect of the center-radical framework structure and the small sizes of Ni2P particles, which are conducive to exposing more Ni(2) sites on the support surface, thus inducing more H for the naphthalene hydrogenation reaction.
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Affiliation(s)
- Di Hu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Aijun Duan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Chunming Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Peng Zheng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Yuyang Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Chengkun Xiao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Cong Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Qian Meng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
| | - Huiping Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, P. R. China.
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37
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Liu Q, Luo M, Zhao Z, Guo L. Effect of Potassium on the Structure, Physic-Chemical and Catalytic Properties of Vanadium-Incorporated Mesoporous Catalysts for the Oxidative Dehydrogenation of Propane. Catal Letters 2019. [DOI: 10.1007/s10562-019-02725-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Hu P, Chen Y, Yan X, Lang WZ, Guo YJ. Correlation of the Vanadium Precursor and Structure Performance of Porous VOX-SiO2 Solids for Catalytic Dehydrogenation of Propane. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b06089] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Hu
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Yan Chen
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Xi Yan
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Wan-Zhong Lang
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
| | - Ya-Jun Guo
- The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
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39
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Wang Y, Hu K, He J, Zhang Y. Improving the size uniformity of dendritic fibrous nano-silica by a facile one-pot rotating hydrothermal approach. RSC Adv 2019; 9:24783-24790. [PMID: 35528672 PMCID: PMC9069929 DOI: 10.1039/c9ra04845f] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/02/2019] [Indexed: 01/21/2023] Open
Abstract
This article provides a facile, low-cost, and reproducible one-pot rotating hydrothermal approach to synthesize dendritic fibrous nano-silica with outstanding uniformity.
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Affiliation(s)
- Yabin Wang
- Shaanxi Key Laboratory of Chemical Reaction Engineering
- College of Chemistry and Chemical Engineering
- Yan'an University
- Yan'an 716000
- P. R. China
| | - Keke Hu
- Shaanxi Key Laboratory of Chemical Reaction Engineering
- College of Chemistry and Chemical Engineering
- Yan'an University
- Yan'an 716000
- P. R. China
| | - Juan He
- Shaanxi Key Laboratory of Chemical Reaction Engineering
- College of Chemistry and Chemical Engineering
- Yan'an University
- Yan'an 716000
- P. R. China
| | - Yantu Zhang
- Shaanxi Key Laboratory of Chemical Reaction Engineering
- College of Chemistry and Chemical Engineering
- Yan'an University
- Yan'an 716000
- P. R. China
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40
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Yang QQ, Hu P, Xiu NY, Lang WZ, Guo YJ. VOx
/γ-Al2
O3
Catalysts for Propane Dehydrogenation Prepared by “Impregnation-Solid Phase Reaction” Method with Aluminum Hydroxide as Support Precursor. ChemistrySelect 2018. [DOI: 10.1002/slct.201802070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qi-Qi Yang
- The Education Ministry Key Laboratory of Resource Chemistry; Shanghai Key Laboratory of Rare Earth Functional Materials; Department of Chemistry and Chemical Engineering; Shanghai Normal University; 100 Guilin Road Shanghai 200234 China
| | - Ping Hu
- The Education Ministry Key Laboratory of Resource Chemistry; Shanghai Key Laboratory of Rare Earth Functional Materials; Department of Chemistry and Chemical Engineering; Shanghai Normal University; 100 Guilin Road Shanghai 200234 China
| | - Nai-Yun Xiu
- The Education Ministry Key Laboratory of Resource Chemistry; Shanghai Key Laboratory of Rare Earth Functional Materials; Department of Chemistry and Chemical Engineering; Shanghai Normal University; 100 Guilin Road Shanghai 200234 China
| | - Wan-Zhong Lang
- The Education Ministry Key Laboratory of Resource Chemistry; Shanghai Key Laboratory of Rare Earth Functional Materials; Department of Chemistry and Chemical Engineering; Shanghai Normal University; 100 Guilin Road Shanghai 200234 China
| | - Ya-Jun Guo
- The Education Ministry Key Laboratory of Resource Chemistry; Shanghai Key Laboratory of Rare Earth Functional Materials; Department of Chemistry and Chemical Engineering; Shanghai Normal University; 100 Guilin Road Shanghai 200234 China
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41
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Mu J, Shi J, France LJ, Wu Y, Zeng Q, Liu B, Jiang L, Long J, Li X. Hybrid Mo-C T Nanowires as Highly Efficient Catalysts for Direct Dehydrogenation of Isobutane. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23112-23121. [PMID: 29923708 DOI: 10.1021/acsami.8b05273] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Direct dehydrogenation of isobutane to isobutene has drawn extensive attention for synthesizing various chemicals. The Mo-based catalysts hold promise as an alternative to the toxic CrO x- and scarce Pt-based catalysts. However, the low activity and rapid deactivation of the Mo-based catalysts greatly hinder their practical applications. Herein, we demonstrate a feasible approach toward the development of efficient and non-noble metal dehydrogenation catalysts based on Mo-C T hybrid nanowires calcined at different temperatures. In particular, the optimal Mo-C700 catalyst exhibits isobutane consumption rate of 3.9 mmol g-1 h-1 and isobutene selectivity of 73% with production rate of 2.8 mmol g-1 h-1. The catalyst maintained 90% of its initial activity after 50 h of reaction. Extensive characterizations reveal that such prominent performance is well correlated with the adsorption abilities of isobutane and isobutene and the formation of η-MoC species. In contrast, the generation of β-Mo2C crystalline phase during long-term reaction causes minor decline in activity. Compared to MoO2 and β-Mo2C, η-MoC plays a role more likely in suppressing the cracking reaction. This work demonstrates a feasible approach toward the development of efficient and non-noble metal dehydrogenation catalysts.
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Affiliation(s)
- Jiali Mu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Junjun Shi
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Liam John France
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Yongshan Wu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Qiang Zeng
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Baoan Liu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst , Fuzhou University , Fuzhou 350002 , P. R. China
| | - Jinxing Long
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
| | - Xuehui Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering , South China University of Technology , Guangzhou 510640 , P. R. China
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42
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Niu X, Wang Z, Zhang L, Quan Y, Wei K. Experimental study of the protective effect of mesosilica-supported 5-hydroxymethylfurfural on UV-induced aging of human dermal fibroblasts. RSC Adv 2018; 8:25021-25030. [PMID: 35542119 PMCID: PMC9082397 DOI: 10.1039/c8ra03980a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/02/2018] [Indexed: 11/21/2022] Open
Abstract
The drug 5-HMF (5-hydroxymethylfurfural, C6H6O3) is extensively studied for its antioxidative and anti-inflammatory properties. However, its unstable properties and biotoxicity restrict its use in skin care products and therapy. The present study was aimed at evaluating the potential of three-dimensional dendritic mesoporous silica nanospheres (3D-dendritic MSNs) as a topical carrier system for 5-HMF delivery. The encapsulation of the carrier also enhances the stability of the drug. Based on the results of Brunauer-Emmet-Teller (BET) analysis, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), dynamic light scattering (DLS), and UV-vis diffuse reflectance spectroscopy, drug delivery systems were successfully fabricated and the loading capacity (LC%) and entrapment efficiency (EE%) were also assessed. In vitro cell tests revealed the outstanding biocompatibility and inoxidizability of 3D-dendritic MSNs. There is no effect on the antioxidant properties of the drug. Therefore, mesoporous silica can be combined with 5-HMF and used as potential antioxidant medicine in cosmetic applications.
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Affiliation(s)
- Xueming Niu
- School of Biological Science and Engineering, South China University of Technology Guangzhou 510640 China +8613902848267
| | - Zhenyu Wang
- Department of Environmental Engineering, College of Ecology, Lishui University Lishui 323000 China
| | - Long Zhang
- Wenzhou Institute of Biomaterials and Engineering, CAS Wenzhou Zhejiang 325011 China
| | - Yunyun Quan
- Wenzhou Institute of Biomaterials and Engineering, CAS Wenzhou Zhejiang 325011 China
- Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province, Wenzhou Institute of Biomaterials and Engineering, CAS Wenzhou Zhejiang 325011 China
| | - Kun Wei
- School of Biological Science and Engineering, South China University of Technology Guangzhou 510640 China +8613902848267
- Wenzhou Institute of Biomaterials and Engineering, CAS Wenzhou Zhejiang 325011 China
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43
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Han ZF, Xue XL, Wu JM, Lang WZ, Guo YJ. Preparation and catalytic properties of mesoporous n V-MCM-41 for propane oxidative dehydrogenation in the presence of CO 2. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63048-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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44
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Hu P, Lang WZ, Yan X, Chu LF, Guo YJ. Influence of gelation and calcination temperature on the structure-performance of porous VOX-SiO2 solids in non-oxidative propane dehydrogenation. J Catal 2018. [DOI: 10.1016/j.jcat.2017.12.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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45
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Zhu Q, Wang G, Liu J, Su L, Li C. Effect of Sn on Isobutane Dehydrogenation Performance of Ni/SiO 2 Catalyst: Adsorption Modes and Adsorption Energies of Isobutane and Isobutene. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30711-30721. [PMID: 28805375 DOI: 10.1021/acsami.7b09482] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The reaction of isobutane over Ni/SiO2 catalyst changes from hydrogenolysis to dehydrogenation when Sn is introduced. The adsorption modes and energies of isobutane and isobutene over the Ni/SiO2 catalyst with and without Sn addition were determined by in situ FTIR and a novel transient response adsorption approach. In the absence of Sn, isobutane is adsorbed in a double-site mode with H atoms in two methyl groups of isobutane, facilitating hydrogenolysis of isobutane. After the addition of Sn, a single-site adsorption mode with the H atom in the methylidyne group is speculated instead, which is beneficial to the rupture of the C-H bond rather than the C-C bond. Moreover, the double-site adsorption mode of isobutene with the C═C bond and the H atom in a methyl group is turned into single-site mode with the C═C bond after the introduction of Sn. As for the adsorption energy of isobutene, the introduction of Sn leads to an obvious decrease from 74 to 50 kJ mol-1 and facilitates the prompt desorption of isobutene, resulting in a high selectivity of 81.9 wt %.
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Affiliation(s)
- Qingqing Zhu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Guowei Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Jianwei Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Lushu Su
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Chunyi Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
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