1
|
Xiong L, Qi H, Zhang S, Zhang L, Liu X, Wang A, Tang J. Highly Selective Transformation of Biomass Derivatives to Valuable Chemicals by Single-Atom Photocatalyst Ni/TiO 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209646. [PMID: 36721913 DOI: 10.1002/adma.202209646] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Selective CC cleavage of the biomass derivative glycerol under mild conditions is recognized as a promising yet challenging synthesis route to produce value-added chemicals. Here, a highly selective catalyst for the transformation of glycerol to the high-value product glycolaldehyde is presented, which is composed of nickel single atoms confined to the surface of titanium dioxide. Driven by light, the catalyst operates under ambient conditions using air as a green oxidant. The optimized catalyst shows a selectivity of over 60% to glycolaldehyde, resulting in 1058 µmol gCat -1 h-1 production rate, and ≈3 times higher turnover number than NiOx -nanoparticle-decorated TiO2 photocatalyst. Diverse operando and in situ spectroscopies unveil the unique function of the Ni single atom, which can significantly promote oxygen adsorption, work as an electron sink, and accelerate the production of superoxide radicals, thereby improving the selectivity toward glycolaldehyde over other by-products.
Collapse
Affiliation(s)
- Lunqiao Xiong
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Haifeng Qi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Shengxin Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Leilei Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Xiaoyan Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Aiqin Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Junwang Tang
- Department of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| |
Collapse
|
2
|
Oberhauser W, Poggini L, Capozzoli L, Bellini M, Filippi J, Vizza F. Oxidation of Ethanol to Acetic Acid by Supported PtCu Nanoparticles Stabilized by a Diamine Ligand. Inorg Chem 2023; 62:2848-2858. [PMID: 36724054 DOI: 10.1021/acs.inorgchem.2c04202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Diamine-capped PtCu nanoparticles have been synthesized by the simultaneous reduction of the corresponding bis-imine metal complexes with hydrogen and supported onto a high-surface-area carbon. The obtained heterogeneous catalyst was tested in thermally conducted aerobic oxidation of ethanol to acetic acid in water as well as in the electrochemical oxidation of ethanol. Both types of catalyses mediated by the PtCu alloy confirmed a notable increase in catalytic activity compared to the pure Pt- and Cu-based counterparts due to a clear bimetallic effect.
Collapse
Affiliation(s)
- Werner Oberhauser
- Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Lorenzo Poggini
- Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Laura Capozzoli
- Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Marco Bellini
- Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Jonathan Filippi
- Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Francesco Vizza
- Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| |
Collapse
|
3
|
Tan L, Sun Y, Yang C, Zhang B, Deng K, Cao X, Guo Y. ZnO/Fe-thioporphyrazine composites as efficient photocatalysts for oxidation of glycerol to value-added C3 products in water. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
4
|
Cheng K, Zhang J, Yang S, Yin F, Li Z, Wang T, Zhou D. Acidolysis of phospholipids with medium-chain fatty acids over M-SBA-15 (M = Zn, Al) silicas as efficient solid catalysts. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:4714-4723. [PMID: 35191052 DOI: 10.1002/jsfa.11832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Efficient and sustainable production of structured phospholipids (SPLs) enriched in medium-chain fatty acids (MCFAs) in a heterogeneous manner is crucial for their potential applications in functional foods and drugs. Herein, for the first time, Zn- and Al-incorporated SBA-15 silicas were prepared by the coprecipitation method and further researched for catalytic synthesis of MCFA-enriched SPLs through acidolysis reaction of natural phospholipids with capric or caprylic acid. RESULTS The as-prepared Zn- and Al-incorporated SBA-15 samples exhibited superior catalytic activities under mild experimental conditions (50 °C, 6 h) to commercial homogeneous Lewis acids and benchmark enzymes. Correspondingly, the capric acid and caprylic acid incorporations were respectively achieved up to ~40.25 ± 0.40% (or 35.08 ± 0.09%) and 37.26 ± 0.38% (or 33.02 ± 0.13%) for Zn- (or Al-) incorporated SBA-15 catalyst. Moreover, various methods such as scanning electron microscopy with energy-dispersive X-ray spectrometry, ultraviolet-visible diffuse reflectance spectroscopy and pyridine-Fourier transform infrared spectroscopy were utilized to characterize the two catalysts in order to elucidate the possible structure-performance relationship. Accordingly, the above-mentioned satisfactory results are most probably due to the well-ordered mesostructures and large amounts of active Lewis acid sites existing in the investigated materials. Noticeably, the two catalysts featured good separation and excellent recyclability as well. CONCLUSION The Zn- and Al-incorporated SBA-15 catalysts studied in this work might shed light on novel, sustainable and economic alternatives for effective SPL production to diminish the applications of conventional homogeneous catalysts and biocatalysts in food industries. © 2022 Society of Chemical Industry.
Collapse
Affiliation(s)
- Ke Cheng
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Jianghua Zhang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, China
| | - Shasha Yang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Fawen Yin
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, China
| | - Zixuan Li
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Ting Wang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, China
| | - Dayong Zhou
- National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian, China
| |
Collapse
|
5
|
Zhang G, Zhao J, Jin X, Qian Y, Zhou M, Jia X, Sun F, Jiang J, Xu W, Sun B. Combined dehydrogenation of glycerol with catalytic transfer hydrogenation of H2 acceptors to chemicals: Opportunities and challenges. Front Chem 2022; 10:962579. [PMID: 36072704 PMCID: PMC9442352 DOI: 10.3389/fchem.2022.962579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 07/13/2022] [Indexed: 11/17/2022] Open
Abstract
Catalytic transformation of low-cost glycerol to value-added lactic acid (LA) is considered as one of the most promising technologies for the upgradation of glycerol into renewable products. Currently, research studies reveal that anaerobic transformation of glycerol to LA could also obtain green H2 with the same yield of LA. However, the combined value-added utilization of released H2 with high selectivity of LA during glycerol conversion under mild conditions still remains a grand challenge. In this perspective, for the first time, we conducted a comprehensive and critical discussion on current strategies for combined one-pot/tandem dehydrogenation of glycerol to LA with catalytic transfer hydrogenation of H2 acceptors (such as CO2) to other chemicals. The aim of this overview was to provide a general guidance on the atomic economic reaction pathway for upgrading low-cost glycerol and CO2 to LA as well as other chemicals.
Collapse
Affiliation(s)
- Guangyu Zhang
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
- *Correspondence: Guangyu Zhang,
| | - Jian Zhao
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Xin Jin
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, Shandong, China
| | - Yanan Qian
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Mingchuan Zhou
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Xuewu Jia
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Feng Sun
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Jie Jiang
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Wei Xu
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| | - Bing Sun
- State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao, Shandong, China
| |
Collapse
|
6
|
Li J, Li Z, Zheng Z, Zhang X, Zhang H, Wei H, Chu H. Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt‐CeO2/CNT Electrocatalyzed Oxidation of Glycerol. ChemCatChem 2022. [DOI: 10.1002/cctc.202200509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jiefei Li
- Inner Mongolia University College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules CHINA
| | - Zhenyu Li
- Chinese Academy of Sciences Dalian Institute of Chemical Physics State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy CHINA
| | | | - Xueqiong Zhang
- Inner Mongolia University College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules CHINA
| | - Hao Zhang
- Inner Mongolia University College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules CHINA
| | - Hang Wei
- Inner Mongolia University College of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules CHINA
| | - Haibin Chu
- Inner Mongolia University College of Chemistry and Chemical Engineering Daxue East Road 235 010021 Hohhot CHINA
| |
Collapse
|
7
|
Selective oxidation of glycerol over different shaped WO3 supported Pt NPs. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.111545] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Barik M, Mishra J, Dabas S, Chinnaraja E, Subramanian S, Subramanian PS. Modified boehmite: a choice of catalyst for the selective conversion of glycerol to five-membered dioxolane. NEW J CHEM 2022. [DOI: 10.1039/d1nj04860k] [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
The catalytic activity of WO3@boehmite for the acetalization of glycerol with aromatic aldehydes is described in this article. The catalyst is selective towards dioxolane (up to 96%) with excellent conversion (up to 100%) in selective substrates.
Collapse
Affiliation(s)
- Manas Barik
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jyotiranjan Mishra
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shilpa Dabas
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eswaran Chinnaraja
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Saravanan Subramanian
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Palani S. Subramanian
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| |
Collapse
|
9
|
Najafishirtari S, Friedel Ortega K, Douthwaite M, Pattisson S, Hutchings GJ, Bondue CJ, Tschulik K, Waffel D, Peng B, Deitermann M, Busser GW, Muhler M, Behrens M. A Perspective on Heterogeneous Catalysts for the Selective Oxidation of Alcohols. Chemistry 2021; 27:16809-16833. [PMID: 34596294 PMCID: PMC9292687 DOI: 10.1002/chem.202102868] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Indexed: 01/15/2023]
Abstract
Selective oxidation of higher alcohols using heterogeneous catalysts is an important reaction in the synthesis of fine chemicals with added value. Though the process for primary alcohol oxidation is industrially established, there is still a lack of fundamental understanding considering the complexity of the catalysts and their dynamics under reaction conditions, especially when higher alcohols and liquid‐phase reaction media are involved. Additionally, new materials should be developed offering higher activity, selectivity, and stability. This can be achieved by unraveling the structure–performance correlations of these catalysts under reaction conditions. In this regard, researchers are encouraged to develop more advanced characterization techniques to address the complex interplay between the solid surface, the dissolved reactants, and the solvent. In this mini‐review, we report some of the most important approaches taken in the field and give a perspective on how to tackle the complex challenges for different approaches in alcohol oxidation while providing insight into the remaining challenges.
Collapse
Affiliation(s)
- Sharif Najafishirtari
- Faculty of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, 47057, Duisburg, Germany
| | - Klaus Friedel Ortega
- Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118, Kiel, Germany
| | - Mark Douthwaite
- Cardiff Catalysis Institute, Cardiff University, CF10 3AT, Cardiff, United Kingdom
| | - Samuel Pattisson
- Cardiff Catalysis Institute, Cardiff University, CF10 3AT, Cardiff, United Kingdom
| | - Graham J Hutchings
- Cardiff Catalysis Institute, Cardiff University, CF10 3AT, Cardiff, United Kingdom
| | - Christoph J Bondue
- Faculty of Chemistry and Biochemistry, Lab. of Electrochemistry & Nanoscale Materials, Ruhr-University Bochum, Universitätsstraße. 150, ZEMOS 1.41, 44780, Bochum, Germany
| | - Kristina Tschulik
- Faculty of Chemistry and Biochemistry, Lab. of Electrochemistry & Nanoscale Materials, Ruhr-University Bochum, Universitätsstraße. 150, ZEMOS 1.41, 44780, Bochum, Germany
| | - Daniel Waffel
- Faculty of Chemistry and Biochemistry, Lab. of Industrial Chemistry, Ruhr-University Bochum, Universitätsstraße 150, NBCF 04 / 690, 44780, Bochum, Germany
| | - Baoxiang Peng
- Faculty of Chemistry and Biochemistry, Lab. of Industrial Chemistry, Ruhr-University Bochum, Universitätsstraße 150, NBCF 04 / 690, 44780, Bochum, Germany
| | - Michel Deitermann
- Faculty of Chemistry and Biochemistry, Lab. of Industrial Chemistry, Ruhr-University Bochum, Universitätsstraße 150, NBCF 04 / 690, 44780, Bochum, Germany
| | - G Wilma Busser
- Faculty of Chemistry and Biochemistry, Lab. of Industrial Chemistry, Ruhr-University Bochum, Universitätsstraße 150, NBCF 04 / 690, 44780, Bochum, Germany
| | - Martin Muhler
- Faculty of Chemistry and Biochemistry, Lab. of Industrial Chemistry, Ruhr-University Bochum, Universitätsstraße 150, NBCF 04 / 690, 44780, Bochum, Germany
| | - Malte Behrens
- Faculty of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, 47057, Duisburg, Germany.,Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118, Kiel, Germany
| |
Collapse
|
10
|
Catalytic Conversion of Glycerol into Hydrogen and Value-Added Chemicals: Recent Research Advances. Catalysts 2021. [DOI: 10.3390/catal11121455] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
In recent decades, the use of biomass as alternative resources to produce renewable and sustainable biofuels such as biodiesel has gained attention given the situation of the progressive exhaustion of easily accessible fossil fuels, increasing environmental concerns, and a dramatically growing global population. The conventional transesterification of edible, nonedible, or waste cooking oils to produce biodiesel is always accompanied by the formation of glycerol as the by-product. Undeniably, it is essential to economically use this by-product to produce a range of valuable fuels and chemicals to ensure the sustainability of the transesterification process. Therefore, recently, glycerol has been used as a feedstock for the production of value-added H2 and chemicals. In this review, the recent advances in the catalytic conversion of glycerol to H2 and high-value chemicals are thoroughly discussed. Specifically, the activity, stability, and recyclability of the catalysts used in the steam reforming of glycerol for H2 production are covered. In addition, the behavior and performance of heterogeneous catalysts in terms of the roles of active metal and support toward the formation of acrolein, lactic acid, 1,3-propanediol, and 1,2-propanediol from glycerol are reviewed. Recommendations for future research and main conclusions are provided. Overall, this review offers guidance and directions for the sufficient and economical utilization of glycerol to generate fuels and high value chemicals, which will ultimately benefit industry, environment, and economy.
Collapse
|
11
|
The Application of Copper-Gold Catalysts in the Selective Oxidation of Glycerol at Acid and Basic Conditions. Catalysts 2021. [DOI: 10.3390/catal11010094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The crude glycerol is produced during the transesterification of animal fats and vegetable oils, but it is a by-product of this process. Currently, its elimination is a problem in the chemical industry. The main goal of this work was the preparation, characterization and application of mesoporous cerium-zirconium oxide as supports for copper and gold species and the comparison of selected factors on the properties of catalysts in glycerol oxidation in the liquid phase. The samples were characterized using adsorption and desorption of nitrogen, XRD, UV-vis, XPS, TEM, SEM, and STEM-EDXS. The obtained results of glycerol oxidation show that the bimetallic copper-gold catalysts are more active and selective to glyceric acid in this reaction than analogous monometallic gold catalysts. Additionally, bimetallic catalysts are also characterized by the catalytic stability, and their application leads to the increase of selectivity to glyceric acid during their reusing in glycerol oxidation in alkali media. In this work, the influence of selected factors, e.g., oxygen source and its pressure, solution pH, and base content on the catalytic activity of bimetallic catalysts is discussed.
Collapse
|
12
|
Underhill R, Douthwaite M, Lewis RJ, Miedziak PJ, Armstrong RD, Morgan DJ, Freakley SJ, Davies T, Folli A, Murphy DM, He Q, Akdim O, Edwards JK, Hutchings GJ. Ambient base-free glycerol oxidation over bimetallic PdFe/SiO2 by in situ generated active oxygen species. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-020-04333-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AbstractLow temperature oxidation of alcohols over heterogeneous catalysts is exceptionally challenging, particularly under neutral conditions. Herein, we report on an efficient, base-free method to oxidise glycerol over a 0.5%Pd-0.5%Fe/SiO2 catalyst at ambient temperature in the presence of gaseous H2 and O2. The exceptional catalytic performance was attributed to the in situ formation of highly reactive surface-bound oxygenated species, which promote the dehydrogenation on the alcohol. The PdFe bimetallic catalyst was determined to be significantly more active than corresponding monometallic analogues, highlighting the important role both metals have in this oxidative transformation. Fe leaching was confirmed to occur over the course of the reaction but sequestering experiments, involving the addition of bare carbon to the reactions, confirmed that the reaction was predominantly heterogeneous in nature. Investigations with electron paramagnetic resonance spectroscopy suggested that the reactivity in the early stages was mediated by surface-bound reactive oxygen species; no homogeneous radical species were observed in solution. This theory was further evidenced by a direct H2O2 synthesis study, which confirmed that the presence of Fe in the bimetallic catalyst neither improved the synthesis of H2O2 nor promoted its decomposition over the PdFe/SiO2 catalyst.
Collapse
|
13
|
Yang P, Douthwaite M, Pan J, Zheng L, Hong S, Morgan DJ, Gao M, Li D, Feng J, Hutchings GJ. Coordinately unsaturated O2c–Ti5c–O2c sites promote the reactivity of Pt/TiO2 catalysts in the solvent-free oxidation of n-octanol. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00686j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordination unsaturated O2c–Ti5c–O2c of TiO2 (001) facets promote the formation of low-coordinate Pt metal clusters, which enhances catalytic performance in aerobic 1-octanol oxidation.
Collapse
Affiliation(s)
- Pengfei Yang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Mark Douthwaite
- Max Planck- Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Jiahao Pan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Lirong Zheng
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- People's Republic of China
| | - Song Hong
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - David J. Morgan
- Max Planck- Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Mingyu Gao
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Dianqing Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Junting Feng
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Graham J. Hutchings
- Max Planck- Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| |
Collapse
|
14
|
Abstract
Once a biorefinery is ready to operate, the main processed materials need to be completely evaluated in terms of many different factors, including disposal regulations, technological limitations of installation, the market, and other societal considerations. In biorefinery, glycerol is the main by-product, representing around 10% of biodiesel production. In the last few decades, the large-scale production of biodiesel and glycerol has promoted research on a wide range of strategies in an attempt to valorize this by-product, with its transformation into added value chemicals being the strategy that exhibits the most promising route. Among them, C3 compounds obtained from routes such as hydrogenation, oxidation, esterification, etc. represent an alternative to petroleum-based routes for chemicals such as acrolein, propanediols, or carboxylic acids of interest for the polymer industry. Another widely studied and developed strategy includes processes such as reforming or pyrolysis for energy, clean fuels, and materials such as activated carbon. This review covers recent advances in catalysts used in the most promising strategies considering both chemicals and energy or fuel obtention. Due to the large variety in biorefinery industries, several potential emergent valorization routes are briefly summarized.
Collapse
|