Transition metal carbide catalysts for biomass conversion: A review

Pang, Jifeng; Sun, Junming; Zheng, Mingyuan; Li, Houqian; Wang, Yong; Zhang, Tao

doi:10.1016/j.apcatb.2019.05.034

Cited by 188 publications

(88 citation statements)

References 182 publications

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“…Suitable solid carbons including carbon supports, 2,7,14 polymers, 8,29 carbon containing chemicals 1,18 and MOFs 17 were applied in carbide synthesis. 2 Solid carbon supports such as activated carbon, CNTs and CNF slow down the carbon diffusion into metal species because of the need to break the C-C bonds from graphitic carbon fragments. The strong C-C bonding and the small metal-carbon interface drive great difficulty in surface and structural engineering even at elevated temperatures.…”

Section: Importance Of Rf Layer For Controlling the Phase Compositionmentioning

confidence: 99%

Stable and Antisintering Tungsten Carbides with Controllable Active Phase for Selective Cleavage of Aryl Ether C–O Bonds

Fang

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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Transition metal carbides (TMCs) are important materials in heterogeneous catalysis. Constructing an active phase by rational carbon insertion to achieve efficient catalytic behavior and prolonging the stability by preventing sintering and structure degradation in redox reactions, especially hydroprocessing, remains challenging yet attracting in nanoscience. This work presents an integrated strategy to synthesize stable tungsten carbide nanoparticles with controllable phase compositions by assembling the metal precursor onto carbon nanotubes (CNTs), wrapping a thin polymeric layer, and following a controlled carburization. The polymer serves as a soft carbon source to modulate the metal/carbon ratio in the carbides and produces amorphous carbon to further stabilize the nanoparticles. The as-built p-WxC/CNT displays more than two-and six-times higher activities for guaiacol hydrogenolysis than those prepared by common temperature-programmed-reduction with gaseous carbon (WxC/CNT-TPR) and carbothermal reduction with intrinsic carbon support (WxC/CNT-CTR) and enhances the stability for more than 150 h. These catalysts also achieve high efficiency on cleavage aryl CO bonds in lignin-derived aromatic ethers including anisole, dimethylphenol, and diphenyl ether with a robust lifespan. 9 mance for more than 150 h of stream reaction. This catalyst also provided satisfying efficiency on the aryl CO bonds cleavage in anisole, dimethylphenol, and diphenyl ether with a stable reaction lifespan. The tolerance of H2 atmosphere and particle sintering were proved to achieve the p-WxC/CNT with ultra-stability. This work presents a viable way to construct a stable carbide catalyst with well-controlled phase compositions for heterogeneous catalysis involving thermo-, electro-, and photo-chemical reactions. ASSOCIATED CONTENT Supporting Information The Supporting Information is available free of charge on the ACS Publications website.

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Section: Importance Of Rf Layer For Controlling the Phase Compositionmentioning

confidence: 99%

Stable and Antisintering Tungsten Carbides with Controllable Active Phase for Selective Cleavage of Aryl Ether C–O Bonds

Fang

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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“…Cellulose conversion includes both conversion between different cellulose forms (such as microcrystalline cellulose, cellulose nanocrystals, cellulose acetate, cellulose nitrate could be obtained) and deep cellulose degradation to small-molecule chemicals. This review would focus on the deep cellulose degradation to representative small molecular chemicals in aqueous phase, which is also different from those reviews about introducing cellulose conversion in the field of catalyst, reaction pathway, or organic solvent effects (Shuai and Luterbacher, 2016;Jing et al, 2019;Pang et al, 2019). Cellulose can be catalytically converted into various chemicals as the established reaction paths under aqueous-phase reaction atmosphere, sugars (glucose, fructose, sorbitol, mannitol, etc.…”

Section: Categories Of Cellulose Conversionmentioning

confidence: 99%

Catalytic Production of Oxygenated and Hydrocarbon Chemicals From Cellulose Hydrogenolysis in Aqueous Phase

Xin

Cai

et al. 2020

Front. Chem.

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As the most abundant polysaccharide in lignocellulosic biomass, a clean and renewable carbon resource, cellulose shows huge capacity and roused much attention on the methodologies of its conversion to downstream products, mainly including platform chemicals and fuel additives. Without appropriate treatments in the processes of cellulose decompose, there are some by-products that may not be chemically valuable or even truly harmful. Therefore, higher selectivity and more economical and greener processes would be favored and serve as criteria in a correlational study. Aqueous phase, an economically accessible and immensely potential reaction system, has been widely studied in the preparation of downstream products of cellulose. Accordingly, this mini-review aims at making a related summary about several conversion pathways of cellulose to target products in aqueous phase. Mainly, there are four categories about the conversion of cellulose to downstream products in the following: (i) cellulose hydrolysis hydrogenation to saccharides and sugar alcohols, like glucose, sorbitol, mannose, etc.; (ii) selective hydrogenolysis leads to the cleavage of the corresponding glucose CC and CO bond, like ethylene glycol (EG), 1,2-propylene glycol (PG), etc.; (iii) dehydration of fructose and further oxidation, like 5-hydroxymethylfurfural (HMF), 2,5-furandicarboxylic acid (FDCA), etc.; and (iv) production of liquid alkanes via hydrogenolysis and hydrodeoxygenation, like pentane, hexane, etc. The representative products were enumerated, and the mechanism and pathway of mentioned reaction are also summarized in a brief description. Ultimately, the remaining challenges and possible further research objects are proposed in perspective to provide researchers with a lucid research direction.

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“…In addition, the functional tailoring of MC-based nanomaterials could be achieved by adjusting the structures of materials from 2D nanosheets, films, and membranes to 3D scaffolds, hydrogels, and aerogels [ 24 , 25 , 26 ]. Previously, great achievements on the synthesis, functionalization, and applications of various MC-based nanomaterials, and a lot of very important reviews have been released [ 27 , 28 , 29 , 30 , 31 , 32 ]. For instance, Yan et al presented a comprehensive review on the synthesis of nanostructured metallic transition metal carbides, nitrides, phosphides, and borides for the applications in energy storage and conversion, in which more attentions were focused on developing new strategies to improve electrochemical performances of nanostructured 2D materials [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advance in the Fabrication of 2D and 3D Metal Carbides-Based Nanomaterials for Energy and Environmental Applications

Wan

Wang

et al. 2021

Nanomaterials

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Two-dimensional (2D) nanomaterials have attracted increased interest and exhibited extended applications from nanotechnology to materials science, biomedicine, tissue engineering, as well as energy storage and environmental science. With the development of the synthesis and fabrication of 2D materials, a new family of 2D materials, metal carbides (MCs), revealed promising applications in recent years, and have been utilized for the fabrication of various functional 2D and three-dimensional (3D) nanomaterials for energy and environmental applications, ascribing to the unique physical and chemical properties of MCs. In this review, we present recent advance in the synthesis, fabrication, and applications of 2D and 3D MC-based nanomaterials. For this aim, we first summarize typical synthesis methods of MCs, and then demonstrate the progress on the fabrication of 2D and 3D MC-based nanomaterials. To the end, the applications of MC-based 2D and 3D materials for chemical batteries, supercapacitors, water splitting, photodegradation, removal of heavy metals, and electromagnetic shielding are introduced and discussed. This work provides useful information on the preparation, hybridization, structural tailoring, and applications of MC-based materials, and is expected to inspire the design and fabrication of novel and functional MXene materials with improved performance.

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Transition metal carbide catalysts for biomass conversion: A review

Cited by 188 publications

References 182 publications

Stable and Antisintering Tungsten Carbides with Controllable Active Phase for Selective Cleavage of Aryl Ether C–O Bonds

Stable and Antisintering Tungsten Carbides with Controllable Active Phase for Selective Cleavage of Aryl Ether C–O Bonds

Catalytic Production of Oxygenated and Hydrocarbon Chemicals From Cellulose Hydrogenolysis in Aqueous Phase

Recent Advance in the Fabrication of 2D and 3D Metal Carbides-Based Nanomaterials for Energy and Environmental Applications

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