Self-hydrogen transfer hydrogenolysis of β-O-4 linkages in lignin catalyzed by MIL-100(Fe) supported Pd–Ni BMNPs

Zhang, Jia‐Wei; Lu, Guo‐ping; Cai, Chun

doi:10.1039/c7gc02087b

Cited by 84 publications

(71 citation statements)

References 52 publications

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“…Since the discovery of redox neutral C-O bond cleavage using Pd/C catalyst [121], several Pd-Ni catalysts with different Pd:Ni ratio had been demonstrated to exhibit hydrogenolysis of lignin derived model compound without the use of hydrogen gas [121]. Both the synergistic effects between the metal nanoparticles and between the metal and the metal organic framework (MOF) supports are crucial factors to optimal catalytic performance.…”

Section: Ni-based Bimetallic Catalysts For Hydrogenolysis Of Ligninmentioning

confidence: 99%

Lignin Valorizations with Ni Catalysts for Renewable Chemicals and Fuels Productions

Chen

Guan

Tsang³

et al. 2019

Catalysts

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Energy and fuels derived from biomass pose lesser impact on the environmental carbon footprint than those derived from fossil fuels. In order for the biomass-to-energy and biomass-to-chemicals processes to play their important role in the loop of the circular economy, highly active, selective, and stable catalysts and the related efficient chemical processes are urgently needed. Lignin is the most thermal stable fraction of biomass and a particularly important resource for the production of chemicals and fuels. This mini review mainly focuses on lignin valorizations for renewable chemicals and fuels production and summarizes the recent interest in the lignin valorization over Ni and relevant bimetallic metal catalysts on various supports. Particular attention will be paid to those strategies to convert lignin to chemicals and fuels components, such as pyrolysis, hydrodeoxygenation, and hydrogenolysis. The review is written in a simple and elaborated way in order to draw chemists and engineers' attention to Ni-based catalysts in lignin valorizations and guide them in designing innovative catalytic materials based on the lignin conversion reaction.Catalysts 2019, 9, 488 2 of 39 processes to play their important role in the loop of the circular economy, first, the process must be energy efficient itself [2]. Second, according to Anastas's second principle [3], atom economy should be maximized and excess starting materials which will not be contained in the final product should be avoided. Thus, developing highly active and selective catalysts and enzymes is an urgent need. Current technology for lignocellulosic valorization includes biochemical fermentation, chemical and thermochemical methods using enzymes and metal catalysts, respectively. Thermochemical methods, including combustion, pyrolysis, and gasification, and chemical methods, such as hydrodeoxygenation (HDO), hydrogenolysis, and oxidative cleavage, have the advantages of higher throughputs due to the short reaction time, and thus are more suitable for commercialized and industrialized scale-up.Woody and herbaceous biomasses are large polymeric networks consisting of ca. 35-50% cellulose, 25-30% hemicellulose (glucomannan and glucuronoxylan), and 15-30% of lignin (macromolecular polymer networks with interconnected phenylpropane and phenol units with various formula, e.g., (C 31 H 34 O 11 ) n ) by weight. Lignin is one of the most thermal stable fractions and a particularly important resource for the production of chemicals and fuels. With careful design of the metal catalysts, either aromatic platform molecules, or fuels components such as naphthenes, can be preferentially produced in high yields and with high selectivity.Over the past decade, numerous monometallic and bimetallic metal catalysts using both precious and base metal precursors on various supports have been reported to successfully convert lignin into valuable products. Transition metals such as Ni (price = US$ 12.628/kg as of April 2019) are much more economically viable than precious metals...

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Section: Ni-based Bimetallic Catalysts For Hydrogenolysis Of Ligninmentioning

confidence: 99%

Lignin Valorizations with Ni Catalysts for Renewable Chemicals and Fuels Productions

Chen

Guan

Tsang³

et al. 2019

Catalysts

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“…Based on our previous experience on design of outstanding catalysts for green and sustainable future, we envisage that development of a catalytic system based on bimetallic nanoparticles maybe essential for C−O activation reaction. Toward this end, herein, a Pd−Ni BMNPs catalyst was fabricated and its catalytic performance for the coupling reactions between ethers and Grignard reagents was evaluated.…”

Section: Optimization Of the Reaction Conditions[a]mentioning

confidence: 99%

“…We started our investigations by reacting 2‐methoxynaphthalene with MeMgBr, Pd−Ni BMNPs was initially selected as the catalyst in light of pioneering work of Chakraborti et al ,. and our previous experience . SiO 2 was used as the support at the outset of our study due to its easy availability.…”

Section: Optimization Of the Reaction Conditions[a]mentioning

confidence: 99%

Pd‐Ni BMNPs Encapsulated in UiO‐66 as an Efficient Catalyst for the Activation of “Inert” C−O Bonds

Zhang

et al. 2018

ChemCatChem

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A catalytic system based on PdÀNi bimetallic nanoparticles (BMNPs) encapsulated in the nanocavities of UiO-66 was established for the activation of CÀO bonds in ethers. Pd 0.25 Ni 4 @UiO-66 catalyst show excellent catalytic performance in the directly methylation and arylation of ethers under a mild reaction condition. High catalytic activity of the catalyst could be ascribed to the "synergistic effect" between the two metal components and strong interaction between BMNPs and the carrier (UiO-66). BMNPs encapsulated in UiO-66 also guarantee a good reusability of the catalyst, the catalyst delivered high catalytic activity for at least four cycles. Our work highlights the great potential value of ethers as powerful alternatives for aryl halides as well as the bright future of BMNPs and MOFs in the catalysis field.

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“…With our interest in the exploring nanometal catalysts for the depolymerization of lignin, [19] herein we report an one-pot Co@CN catalyzed selective oxidative dissociation of lignin and lignin model compounds with different linkages like β-O-4, α-O-4 and β-1 in methanol in the presence of ambient pressure O 2 under mild conditions (383 K) without the assistance of any acid, base, ligand or noble metal.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Nanoparticles Embedded in N‐Doped Porous Carbon Derived from Bimetallic Zeolitic Imidazolate Frameworks for One‐Pot Selective Oxidative Depolymerization of Lignin

et al. 2019

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Cobalt nanoparticles embedded in N‐doped porous carbon (Co@CN) were prepared by the pyrolysis of bimetallic zeolitic imidazolate frameworks (BMZIFs) based on ZIF‐8 and ZIF‐67. The catalyst shows excellent catalytic efficiency in one‐pot selective oxidative cleavage of different linkages like β‐O‐4, a‐O‐4 and β‐1 in organosolv lignin and lignin model compounds in the presence of oxygen (ambient pressure) under mild conditions (383 K). Compared with traditional supported catalyst, the catalyst gives a highly hollow structure, which favored the adsorption of substrates and oxygen. The uniform cobalt nanoparticles surrounded by N‐doped graphitic structures and the strong electron transfer from graphitic nitrogen to Co NPs make it hard to be oxidized prior to use and higher catalytic reactivity. Moreover, the catalyst can be easily recovered by magnetic force after the reaction, and reused after reduction for five times without an obvious change in yields.

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Self-hydrogen transfer hydrogenolysis of β-O-4 linkages in lignin catalyzed by MIL-100(Fe) supported Pd–Ni BMNPs

Abstract: A MIL-100(Fe) supported Pd–Ni BMNP catalyst has been fabricated, and the catalyst exhibits superior catalytic performance toward intramolecular transfer hydrogenolysis of lignin model compounds and organosolv lignin.

Cited by 84 publications

References 52 publications

Lignin Valorizations with Ni Catalysts for Renewable Chemicals and Fuels Productions

Lignin Valorizations with Ni Catalysts for Renewable Chemicals and Fuels Productions

Pd‐Ni BMNPs Encapsulated in UiO‐66 as an Efficient Catalyst for the Activation of “Inert” C−O Bonds

Cobalt Nanoparticles Embedded in N‐Doped Porous Carbon Derived from Bimetallic Zeolitic Imidazolate Frameworks for One‐Pot Selective Oxidative Depolymerization of Lignin

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