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Electrochemical Valorization of Lignin: Status, Challenges, and Prospects. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2022. [DOI: 10.1016/j.jobab.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Ayub R, Raheel A. High-Value Chemicals from Electrocatalytic Depolymerization of Lignin: Challenges and Opportunities. Int J Mol Sci 2022; 23:ijms23073767. [PMID: 35409138 PMCID: PMC8999055 DOI: 10.3390/ijms23073767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/25/2022] [Accepted: 03/25/2022] [Indexed: 12/04/2022] Open
Abstract
Lignocellulosic biomass is renewable and one of the most abundant sources for the production of high-value chemicals, materials, and fuels. It is of immense importance to develop new efficient technologies for the industrial production of chemicals by utilizing renewable resources. Lignocellulosic biomass can potentially replace fossil-based chemistries. The production of fuel and chemicals from lignin powered by renewable electricity under ambient temperatures and pressures enables a more sustainable way to obtain high-value chemicals. More specifically, in a sustainable biorefinery, it is essential to valorize lignin to enhance biomass transformation technology and increase the overall economy of the process. Strategies regarding electrocatalytic approaches as a way to valorize or depolymerize lignin have attracted significant interest from growing scientific communities over the recent decades. This review presents a comprehensive overview of the electrocatalytic methods for depolymerization of lignocellulosic biomass with an emphasis on untargeted depolymerization as well as the selective and targeted mild synthesis of high-value chemicals. Electrocatalytic cleavage of model compounds and further electrochemical upgrading of bio-oils are discussed. Finally, some insights into current challenges and limitations associated with this approach are also summarized.
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Affiliation(s)
- Rabia Ayub
- RISE Processum AB, Bioeconomy and Health Division, SE-891 22 Örnsköldsvik, Sweden
- Correspondence: or
| | - Ahmad Raheel
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan;
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Affiliation(s)
- Cheng Yang
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Stephen Maldonado
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
- Program in Applied Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Corey R. J. Stephenson
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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Cui T, Ma L, Wang S, Ye C, Liang X, Zhang Z, Meng G, Zheng L, Hu HS, Zhang J, Duan H, Wang D, Li Y. Atomically Dispersed Pt-N 3C 1 Sites Enabling Efficient and Selective Electrocatalytic C-C Bond Cleavage in Lignin Models under Ambient Conditions. J Am Chem Soc 2021; 143:9429-9439. [PMID: 34138542 DOI: 10.1021/jacs.1c02328] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Selective cleavage of C-C linkages is the key and a challenge for lignin degradation to harvest value-added aromatic compounds. To this end, electrocatalytic oxidation presents a promising technique by virtue of mild reaction conditions and strong sustainability. However, the existing electrocatalysts (traditional bulk metal and metal oxides) for C-C bond oxidative cleavage suffer from poor selectivity and low product yields. We show for the first time that atomically dispersed Pt-N3C1 sites planted on nitrogen-doped carbon nanotubes (Pt1/N-CNTs), constructed via a stepwise polymerization-carbonization-electrostatic adsorption strategy, are highly active and selective toward Cα-Cβ bond cleavage in β-O-4 model compounds under ambient conditions. Pt1/N-CNTs exhibits 99% substrate conversion with 81% yield of benzaldehyde, which is exceptional and unprecedented compared with previously reported electrocatalysts. Moreover, Pt1/N-CNTs using only 0.41 wt % Pt achieved a much higher benzaldehyde yield than those of the state-of-the-art bulk Pt electrode (100 wt % Pt) and commercial Pt/C catalyst (20 wt % Pt). Systematic experimental investigation together with density functional theory (DFT) calculation suggests that the superior performance of Pt1/N-CNTs arises from the atomically dispersed Pt-N3C1 sites facilitating the formation of a key Cβ radical intermediate, further inducing a radical/radical cross-coupling path to break the Cα-Cβ bond. This work opens up opportunities in lignin valorization via a green and sustainable electrochemical route with ultralow noble metal usage.
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Affiliation(s)
- Tingting Cui
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Lina Ma
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shibin Wang
- Institute of Industrial Catalysis, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Chenliang Ye
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xiao Liang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Zedong Zhang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Ge Meng
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Han-Shi Hu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Jiangwei Zhang
- Dalian National Laboratory for Clean Energy & State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Haohong Duan
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yadong Li
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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Kumaravel S, Thiruvengetam P, Karthick K, Sankar SS, Karmakar A, Kundu S. Green and sustainable route for oxidative depolymerization of lignin: New platform for fine chemicals and fuels. Biotechnol Prog 2020; 37:e3111. [PMID: 33336509 DOI: 10.1002/btpr.3111] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/26/2020] [Accepted: 12/08/2020] [Indexed: 01/08/2023]
Abstract
Depolymerization of lignin biomass to its value-added chemicals and fuels is pivotal for achieving the goals for sustainable society, and therefore has acquired key interest among the researchers worldwide. A number of distinct approaches have evolved in literature for the deconstruction of lignin framework to its mixture of complex constituents in recent decades. Among the existing practices, special attention has been devoted for robust site selective chemical transformation in the complex structural frameworks of lignin. Despite the initial challenges over a period of time, oxidation and oxidative cleavage process of aromatic building blocks of lignin biomass toward the fine chemical synthesis and fuel generation has improved substantially. The development has improved in terms of cost effectiveness, milder reaction conditions, and purity of compound individuals. These aforementioned oxidative protocols mainly involve the breaking of C-C and C-O bonds of complex lignin frameworks. More precisely in the line with environmentally friendly greener approach, the catalytic oxidation/oxidative cleavage reactions have received wide spread interest for their mild and selective nature toward the lignin depolymerization. This mini-review aims to provide an overview of recent developments in the field of oxidative depolymerization of lignin under greener and environmentally benign conditions. Also, these oxidation protocols have been discussed in terms of scalability and recyclability as catalysts for different fields of applications.
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Affiliation(s)
- Sangeetha Kumaravel
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, 630003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | | | - Kannimuthu Karthick
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, 630003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Selvasundarasekar Sam Sankar
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, 630003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Arun Karmakar
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, 630003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Subrata Kundu
- Electrochemical Process Engineering (EPE) Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi, 630003, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Garedew M, Lin F, Song B, DeWinter TM, Jackson JE, Saffron CM, Lam CH, Anastas PT. Greener Routes to Biomass Waste Valorization: Lignin Transformation Through Electrocatalysis for Renewable Chemicals and Fuels Production. CHEMSUSCHEM 2020; 13:4214-4237. [PMID: 32460408 DOI: 10.1002/cssc.202000987] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/23/2020] [Indexed: 06/11/2023]
Abstract
Lignin valorization is essential for biorefineries to produce fuels and chemicals for a sustainable future. Today's biorefineries pursue profitable value propositions for cellulose and hemicellulose; however, lignin is typically used mainly for its thermal energy value. To enhance the profit potential for biorefineries, lignin valorization would be a necessary practice. Lignin valorization is greatly advantaged when biomass carbon is retained in the fuel and chemical products and when energy quality is enhanced by electrochemical upgrading. Though lignin upgrading and valorization are very desirable in principle, many barriers involved in lignin pretreatment, extraction, and depolymerization must be overcome to unlock its full potential. This Review addresses the electrochemical transformation of various lignins with the aim of gaining a better understanding of many of the barriers that currently exist in such technologies. These studies give insight into electrochemical lignin depolymerization and upgrading to value-added commodities with the end goal of achieving a global low-carbon circular economy.
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Affiliation(s)
- Mahlet Garedew
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, 06511, USA
- Centre for Green Chemistry and Green Engineering, Yale University, New Haven, CT, 06511, USA
| | - Fang Lin
- Centre for Green Chemistry and Green Engineering, Yale University, New Haven, CT, 06511, USA
- Department of Chemistry, Yale University, New Haven, CT, 06511, USA
| | - Bing Song
- Scion, 49 Sala Street, Private Bag 3020, Rotorua, 3020, New Zealand
| | - Tamara M DeWinter
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, 06511, USA
- Centre for Green Chemistry and Green Engineering, Yale University, New Haven, CT, 06511, USA
| | - James E Jackson
- Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA
| | - Christopher M Saffron
- Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Department of Chemical Engineering and Material Science, Michigan State University, East Lansing, MI, 48824, USA
| | - Chun Ho Lam
- City University of Hong Kong, School of Energy and Environment, Kowloon Tong, China
| | - Paul T Anastas
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, 06511, USA
- Centre for Green Chemistry and Green Engineering, Yale University, New Haven, CT, 06511, USA
- School of Public Health, Yale University, New Haven, CT, 06510, USA
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Electrochemical oxidative valorization of lignin by the nanostructured PbO2/MWNTs electrocatalyst in a low-energy depolymerization process. J APPL ELECTROCHEM 2020. [DOI: 10.1007/s10800-020-01451-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bosque I, Magallanes G, Rigoulet M, Kärkäs MD, Stephenson CRJ. Redox Catalysis Facilitates Lignin Depolymerization. ACS CENTRAL SCIENCE 2017; 3:621-628. [PMID: 28691074 PMCID: PMC5492418 DOI: 10.1021/acscentsci.7b00140] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Indexed: 05/06/2023]
Abstract
Lignin is a recalcitrant and underexploited natural feedstock for aromatic commodity chemicals, and its degradation generally requires the use of high temperatures and harsh reaction conditions. Herein we present an ambient temperature one-pot process for the controlled oxidation and depolymerization of this potent resource. Harnessing the potential of electrocatalytic oxidation in conjugation with our photocatalytic cleavage methodology, we have developed an operationally simple procedure for selective fragmentation of β-O-4 bonds with excellent mass recovery, which provides a unique opportunity to expand the existing lignin usage from energy source to commodity chemicals and synthetic building block source.
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Li C, Zhao X, Wang A, Huber GW, Zhang T. Catalytic Transformation of Lignin for the Production of Chemicals and Fuels. Chem Rev 2015; 115:11559-624. [PMID: 26479313 DOI: 10.1021/acs.chemrev.5b00155] [Citation(s) in RCA: 1000] [Impact Index Per Article: 111.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Changzhi Li
- State Key Laborotary of Catalysis, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Xiaochen Zhao
- State Key Laborotary of Catalysis, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - Aiqin Wang
- State Key Laborotary of Catalysis, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
| | - George W Huber
- State Key Laborotary of Catalysis, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.,Department of Chemical and Biological Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Tao Zhang
- State Key Laborotary of Catalysis, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China
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Reichert E, Wintringer R, Volmer DA, Hempelmann R. Electro-catalytic oxidative cleavage of lignin in a protic ionic liquid. Phys Chem Chem Phys 2012; 14:5214-21. [DOI: 10.1039/c2cp23596j] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tolba R, Tian M, Wen J, Jiang ZH, Chen A. Electrochemical oxidation of lignin at IrO2-based oxide electrodes. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2009.12.013] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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