Innovative Protocols in the Catalytic Oxidation of 5‐Hydroxymethylfurfural

Su, Ting; Zhao, Deyang; Wang, Yantao; Lü, Hongying; Varma, Rajender S.; Len, Christophe

doi:10.1002/cssc.202002232

Cited by 79 publications

(53 citation statements)

References 103 publications

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“…While these yields are likely a result of byproduct reactions, this study shows important progress for photoelectrochemical cell (PEC) systems for scalable and low‐cost production of both solar fuels and valorized biomass products without requiring the sluggish oxygen evolution reaction (OER). For interested readers, photocatalytic strategies for HMF oxidation are reviewed in detail elsewhere [32] . In the context of photocatalysts for HMF oxidation, titanium oxide (TiO 2 ) and metal‐supported TiO 2 , [60] zinc cadmium sulfide (ZnCdS), [61] cadmium sulfide (CdS), [62] and carbon nitrides (C 3 N 4 ) [63] have received attention as substrates.…”

Section: Electrochemical Oxidation Strategiesmentioning

confidence: 99%

“…For engaged readers in the topic of HMF oxidation, a recently published Minireview by Su et al. is recommended, which focused on the recent progress in innovative methods in the catalytic oxidation of HMF [32] . This Review provided a critical discussion on HMF conversion to FDCA and other intermediates by introducing photocatalysis, microwave, and continuous‐flow regimes in addition to electrocatalysts for HMF oxidation.…”

Section: Introductionmentioning

confidence: 99%

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Advances in Electrochemical Modification Strategies of 5‐Hydroxymethylfurfural

et al. 2021

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The development of electrochemical catalytic conversion of 5‐hydroxymethylfurfural (HMF) has recently gained attention as a potentially scalable approach for both oxidation and reduction processes yielding value‐added products. While the possibility of electrocatalytic HMF transformations has been demonstrated, this growing research area is in its initial stages. Additionally, its practical applications remain limited due to low catalytic activity and product selectivity. Understanding the catalytic processes and design of electrocatalysts are important in achieving a selective and complete conversion into the desired highly valuable products. In this Minireview, an overview of the most recent status, advances, and challenges of oxidation and reduction processes of HMF was provided. Discussion and summary of voltammetric studies and important reaction factors (e. g., catalyst type, electrode material) were included. Finally, biocatalysts (e. g., enzymes, whole cells) were introduced for HMF modification, and future opportunities to combine biocatalysts with electrochemical methods for the production of high‐value chemicals from HMF were discussed.

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Section: Electrochemical Oxidation Strategiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advances in Electrochemical Modification Strategies of 5‐Hydroxymethylfurfural

et al. 2021

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“… 76 Several appliances under process intensification conditions have been reported as nonconventional protocols for the catalytic oxidation of 5-hydroxy furfural (HMF) produced from cellulose. 77 Recently, aqueous H 2 O 2 and air were deployed as oxidants in a commercial Ru/C catalyzed oxidation of HMF ( Scheme 13 ) by means of different nonconventional technologies such as MW irradiation and continuous-flow MW irradiation. 78 The reaction displayed excellent results in MW batch mode under optimized conditions, but a lower yield in continuous flow mode was obtained due to the instability of the catalyst.…”

Section: Applied Homogeneous and Heterogenoeus Catalysismentioning

confidence: 99%

Impact of Microwaves on Organic Synthesis and Strategies toward Flow Processes and Scaling Up

2021

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Microwave-assisted organic synthesis has been widely studied and deliberated, opening up some controversial issues as well. Nowadays, microwave chemistry is a mature technology that has been well demonstrated in many cases with numerous advantages in terms of the reaction rate and yield. The strategies toward scaling up find an ally in continuous-flow reactor technology comparing dielectric and conductive heating.

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“…[3] 5-hydroxymethylfurfural (HMF) is a key biobased platform chemical obtained from C 6 monosaccharides (derived from the depolymerization of cellulosic biomass), [4] which can be further converted into high value-added chemical such as 2,5-diformylfuran (DFF). [5,6] DFF has a broad range of potential applications as an intermediate for the synthesis of macrocyclic ligands, bio-based polymeric materials, pharmaceutical products, or antifungal agents etc. [7] Consequently, the selective oxidation of HMF to DFF has received considerable attention to date.…”

Section: Introductionmentioning

confidence: 99%

Selective Oxidation of 5‐Hydroxymethylfurfural to 2,5‐Diformylfuran by Visible Light‐Driven Photocatalysis over In Situ Substrate‐Sensitized Titania

et al. 2021

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Solar energy‐driven processes for biomass valorization are priority for the growing industrialized society. To address this challenge, efficient visible light‐active photocatalyst for the selective oxidation of biomass‐derived platform chemical is highly desirable. Herein, selective oxidation of 5‐hydroxymethylfurfural (HMF) to 2,5‐diformylfuran (DFF) was achieved by visible light‐driven photocatalysis over titania. Pristine titania is photocatalytically inactive under visible light, so an unconventional approach was employed for the visible light (λ=515 nm) sensitization of titania via a formation of a visible light‐absorbing complex of HMF (substrate) on the titania surface. Surface‐complexation of HMF on titania mediated ligand‐to‐metal charge transfer (LMCT) under visible light, which efficiently catalyzed the oxidation of HMF to DFF. A high DFF selectivity of 87 % was achieved with 59 % HMF conversion after 4 h of illumination. The apparent quantum yield obtained for DFF production was calculated to be 6.3 %. It was proposed that the dissociative interaction of hydroxyl groups of HMF and the titania surface is responsible for the surface‐complex formation. When the hydroxyl groups of titania were modified via surface‐fluorination or calcination the oxidation of HMF was inhibited under visible light, signifying that hydroxyl groups are decisive for photocatalytic activity.

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Innovative Protocols in the Catalytic Oxidation of 5‐Hydroxymethylfurfural

Cited by 79 publications

References 103 publications

Advances in Electrochemical Modification Strategies of 5‐Hydroxymethylfurfural

Advances in Electrochemical Modification Strategies of 5‐Hydroxymethylfurfural

Impact of Microwaves on Organic Synthesis and Strategies toward Flow Processes and Scaling Up

Selective Oxidation of 5‐Hydroxymethylfurfural to 2,5‐Diformylfuran by Visible Light‐Driven Photocatalysis over In Situ Substrate‐Sensitized Titania

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