NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 5
·2090-2097
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IF 3.269
Dongshun Deng,Yaotai Jiang,Xiaobang Liu
A series of furoate anion-functionized ionic liquids (ILs) were synthesized and applied as new absorbents for SO2. Results showed that these ILs possessed satisfactory performance for SO2 absorption. At 293.15 K, the maximum absorption capacity was 0.69 and 0.24 g SO2 per g P4442[FA] under 1.0 and 0.1 bar, respectively. The SO2 enriched ILs were easily regenerated by bubbling N2 at 343.15 K and recycled five times without obvious loss of absorption performance. The influences of temperature, SO2 partial pressure, and water content in ILs on SO2 absorption performance were systematically explored. The absorption capacity of ILs is discussed from aspects of the structure of cations, anions, and the interaction of cation–anion. The absorption mechanism was analyzed using NMR and FTIR methods. The selectivities of SO2/CO2, SO2/N2 and SO2/O2 were studied and [P4442][FA] achieved relatively high selectivity for SO2 compared to other gases. Present furoate ILs demonstrate potential application as a SO2 absorbent owing to their good performance.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Yuhong Guo,Qiuxiang Yin,Hongxun Hao,Meijing Zhang,Ying Bao,Baohong Hou,Wei Chen,Hui Zhang,Wenjie Cong
Solubility data of furan-2-carboxylic acid in six pure solvents and two kinds of binary solvent mixtures were measured from 279.35 K to 326.15 K. The effect of solvent and temperature on the solubility of furan-2-carboxylic acid was discussed. The experimental solubility data of furan-2-carboxylic acid in six pure solvents were correlated by four thermodynamic models. The nearly ideal binary solvent (NIBS)/Redlich–Kister model was used to correlate the solubility data in binary solvent mixtures. In addition, the melting temperature and fusion enthalpy of furan-2-carboxylic acid were measured by differential scanning calorimetry. By using solubility data and the van’t Hoff equation, the dissolution entropy, enthalpy, and molar Gibbs free energy of furan-2-carboxylic acid in pure solvents were also obtained and analyzed.
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DALTON TRANSACTIONS
·
2024
·
IF 3.5
Peiyao Liu,Zhengzeng Yang,Mengyuan Zhang,Yufeng Liu,Dandan Han,Dan Wu,Charles Chunbao Xu,Jianshe Wang
C-H carboxylation of furoic acid (FA) with CO2 is an atom-efficient strategy to produce 2,5-furandicarboxylic acid (2,5-FDCA) from lignocellulose. The existing carbonate-promoted CO2 carboxylation processes rely on the use of large amounts of expensive Cs2CO3 as deprotonating reagent and molten salt. Substitution of Cs with other cheap and abundant alkali ions (such as K and Na) can reduce the use of Cs, but faces the problem of low yield of 2,5-FDCA. This study found that the addition of catalytic amounts of ZnCl2 as a Lewis acid can increase the yield of 2,5-FDCA in the CO2 carboxylation reaction of Na/K-FA in a molten salt reaction system. 1H NMR analysis and DFT calculations confirmed that ZnCl2 coordinates with the furan ring through electron transfer from the conjugated furan ring to Zn2+, thereby activating the H at the C5 position of Na/K-FA. This coordination lengthened the C5-H bond and lowered its heterolytic dissociation energy, making it more susceptible to being deprotonated by CO32- and subsequently carboxylated by CO2. The developed Lewis acid coordination strategy provides a new idea for the efficient construction of C-C bonds between CO2 and aromatics through carbonate-promoted C-H carboxylation.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qingqing Pang,Kaihang Sun,Xizheng Fan,Kun Xiang,Baojun Li,Shufang Zhao,Young Dok Kim,Qiaoyun Liu,Zhongyi Liu,Zhikun Peng
The dynamic evolution of catalyst structures during the electrocatalytic reaction has seriously hindered our comprehensive understanding of catalytic processes and pathways. In this work, we report that the metal-sulfide (ReS 2 /Co 9 S 8 ) heterostructure has multiple synergistic effects, enhancing the furfural oxidation reaction (FOR) coupling with hydrogen evolution (HER). Under cathodic reduction conditions, H 2 production can be promoted at specific active sites by the original heterostructure of ReS 2 /Co 9 S 8 . Under anodic oxidation conditions, a new heterointerface of ReS 2 /Co 9 S 8 -Co(OH) 2 is in-situ reconstructed based on the original ReS 2 /Co 9 S 8 heterostructure. The new ReS 2 /Co 9 S 8 -Co(OH) 2 heterointerface induced by this ReS 2 /Co 9 S 8 heterostructure significantly enhances FOR performance in an indirect way at 1.33–1.53 V RHE , resulting in a 86.3 % faradaic efficiency (FE). The optimized composite of ReS 2 /Co 9 S 8 with different molar ratios in a two-electrode system exhibits superior performance toward HER||FOR, achieving a smaller cell voltage of 1.43 V to reach 10 mA cm −2 compared to ReS 2 ||Co 9 S 8 (1.69 V). This work verifies the reconstructed heterointerface of ReS 2 /Co 9 S 8 -Co(OH) 2 for FOR and identifies the distinct catalytic mechanisms for FOR and HER.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jia Cheng,Zhiwei Zeng,Xun Huang,Zidong Wei
The electrocatalytic oxidation of furfural (FA) for the production of valuable chemicals, such as 2-furancarboxylic acid (FAC), presents an attractive alternative to the sluggish oxygen evolution reaction during water electrolysis for hydrogen production. However, the activity and stability of the current electrocatalysts still require further enhancement. In this study, NiMoP is fabricated on Ni foam through pulsed electrodeposition to facilitate the electrooxidation of FA for FAC production in an alkaline environment. A low voltage of 1.43 V vs. reversible hydrogen electrode (RHE) is adequate to achieve a current density of 500 mA cm −2 , with FAC selectivity and Faraday efficiency reaching 97.5 % and 95.2 %, respectively. The extended electrolysis of FA using a continuous-flow electrolytic cell under high current density (500 mA cm −2 ) demonstrates consistent stability at a cell voltage around 1.8 V over a 35-h duration.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Haiyan Ji,Zhaowen Wu,Tong Li,Guidong Ju,Huaming Li,Yong Wang,Hui Xu,Junfeng Liu
The high energy requirements of water electrolysis, driven largely by the sluggish kinetics of the oxygen evolution reaction (OER), hinder its widespread application for hydrogen production. This study presents an innovative alternative by replacing OER with the thermodynamically favorable furfural oxidation reaction (FOR), utilizing a CuPt nanowire (NW)/Cu electrocatalyst. The incorporation of Pt into Cu NWs significantly enhances FOR activity, enabling the production of value-added furoic acid alongside hydrogen gas at reduced voltages. The CuPt NWs/Cu catalyst also exhibits excellent hydrogen evolution reaction (HER) performance in alkaline media. By employing CuPt NWs/Cu as both the anodic and cathodic catalyst, we develop a two-electrode electrolyzer that integrates FOR and HER, allowing simultaneous hydrogen production at both electrodes. Operating at a current density of 10 mA cm −2 , the system requires an exceptionally low cell voltage of 0.39 V and an electricity consumption of 0.47 kWh per m 3 H 2 , demonstrating its efficiency for energy-saving bipolar hydrogen generation.
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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 8
·e2423542122
·
IF 9.1
Ze-Cheng Yao,Jing Chai,Tang Tang,Liang Ding,Zhe Jiang,Jiaju Fu,Xiaoxia Chang,Bingjun Xu,Liang Zhang,Jin-Song Hu,Li-Jun Wan
Electrocatalytic reduction (ECR) of furfural represents a sustainable route for biomass valorization. Unfortunately, traditional Cu-catalyzed ECR suffers from diversified product distribution and industrial-incompatible production rates, mainly caused by the intricate mechanism−performance relationship. Here, we manipulate hydrogenation pathways on Cu by introducing ceria as an auxiliary component, which enables the mechanism switching from proton-coupled electron transfer to electrochemical hydrogen-atom transfer (HAT) and thus high-speed furfural-to-furfuryl alcohol electroconversion. Theoretical and kinetic analyses show that oxygen-vacancy-rich ceria delivers an efficient formation−diffusion−hydrogenation chain of H* by diminishing H* adsorption. Spectroscopic characterizations indicate that Cu/ceria interfacial perimeter enriches the local furfural, synergistically lowering the barrier of the rate-determining HAT step across the perimeter. Our Cu/ceria catalyst realizes high-rate HAT-dominated ECR for electrosynthesis of single-product furfuryl alcohol, achieving a high production rate of 19.1 ± 0.4 mol h−1 m−2 and a Faradaic efficiency of 97 ± 1% at an economically viable partial current density of over 0.1 A cm−2. Our results demonstrate a highly efficient route for biofeedstock valorization with enhanced techno-economic feasibility.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Shiling Zhao,Kaizhi Wang,Shaoqi Mao,Beibei Yang,Yu Zhao
In the pursuit of high-selective oxidation of 5-hydroxymethylfurfural (HMF) to valuable derivatives such as 5-hydroxymethylfuroic acid (HMFCA), 5-formyl-2-furanoic acid (FFCA), and furan-2,5-dicarboxylic acid (FDCA), we have developed a diethylenetriamine pentaacetic acid (DTPA)-assisted strategy to construct a highly effective photothermal catalyst with maximized Ag–CeO2 interfaces and rich oxygen vacancies. Under optimal reaction conditions, this catalyst achieves remarkable yields of 99% for HMFCA, 99% for FFCA with a turnover frequency (TOF) of 163 h–1, and 98% for FDCA. Combined theoretical calculations and a series of characterization analyses reveal that the superior performance is due to the unique properties of the maximized Ag–CeO2 interfaces and the rich oxygen vacancies, which enhance electron transport and synergistically enhance the catalytic activity of silver clusters. In contrast to other photocatalytic oxidation systems for HMF, this work showcases high selectivity in the oxidation of HMF to HMFCA, FFCA, and FDCA. These findings not only elucidate the mechanisms behind selective oxidation but also offer a promising approach for the directional photosynthesis of high-purity chemicals in related applications.
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POLYMER
·
2024
·
IF 4.1
Shuai Sun,Ruiyu Zhang,Wenxun Sun,Yifei Ding,Linghui Meng,Yongping Bai
Mechanical properties are essential for polyester materials due to their widespread applications as fibers, films, and engineering accessories. The copolymerization strategy has been developed to enhance polyester properties, but facile-synthesized new materials are still under discovery. In this work, we designed a series of terminal functioned polyesters, for introducing plasticization effects and π-π stacking interactions. The fabrication process can be one-pot achieved via melting polycondensation method. The prepared modified polyesters exhibit significantly improved elongation of break (560%), which is 104% improved compared with pristine poly(ethylene terephthalate). Meanwhile, the maximum toughness reaches 206.1 MJ/m 3 . The thermal properties, viscoelastic properties, crystallinity properties, and fracture morphologies of the as-prepared polyesters are investigated as well. Results show that great elongation of break, higher crystallinity, and good processability are achieved simultaneously. This work provides a one-pot fabricated terminal functioned polyester with advanced tensile properties , expanding its potential application as engineering materials .
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CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Zhenghao Mao,Wenjing Xu,Na Han,Yanguang Li
Aldehydes are valuable intermediates with widespread industrial applications, and their traditional synthesis relies on chemical oxidation that is often hazardous and environmentally unfriendly. Electrochemical oxidation offers a more sustainable and milder alternative; however, it faces challenges such as aldehyde overoxidation and susceptibility to base-catalyzed Cannizzaro disproportionation. Electrochemical glycerol oxidation to glyceraldehyde is a representative example, which typically requires precious metal-based electrocatalysts but still suffers from low selectivity and activity. Here, we report a metal-free oxidation strategy mediated by 2,2,6,6-tetramethylpiperidine-1-oxyl. By systematically investigating the redox thermodynamics and kinetics of TEMPO across a broad pH range, we construct a Pourbaix diagram and elucidate the relative kinetics of each reaction step. These insights allow us to explain the anomalously high apparent Faradaic efficiency (~200%) observed under acidic conditions, and identify neutral media as the optimal environment for selective glyceraldehyde production. Under optimized conditions, our system achieves a glyceraldehyde Faradaic efficiency exceeding 93% and a partial current density of 23.3 mA cm –2 at 0.57 V — more than doubling the performance of the best reported precious metal-based systems. Furthermore, the versatility of this strategy extends to the selective oxidation of other primary alcohols to their corresponding aldehydes with near-unity selectivity.
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ACS Catalysis
·
2025
·
IF 13.1
Ruiqi Fang,Jie Kang,Fengliang Wang,Xin Zhao,Yingwei Li
The production of valerate esters, a class of transportation biofuels (additives), usually undergoes alternate hydrogenation and acid-catalysis dehydration processes that suffer from inevitable coke deposition and undesirable side reactions. We report a one-pot esterification–hydrogenolysis reaction pathway for valeric biofuels synthesis from biomass-derived 2-furoic acid, which was proceeded over the elaborate CoPtX@Co3O4-NC (X = 0.01, 0.02, 0.05, and 0.1) catalysts. The catalysts were constructed through a MOF-engaged etching-pyrolysis-replacement strategy to obtain mesoporous pocket cube nanoboxes-in-nanobox morphology and uniform CoPtX@Co3O4 core–shell nanoparticles with Pt moieties in tunable content and size (from single-atom scale to 2.4 nm). The obtained acid-free CoPtX@Co3O4-NC catalyst achieved an average 92.2% yield of ethyl valerate at a complete conversion of 2-furoic acid, and the reaction ran steadily in a microchannel continuous flow reactor for at least 200 h, which also inhibited the byproduct generation and coke deposition. A mechanistic study suggested that 2-furoic acid was preferably adsorbed on the oxyphilic Co3O4 shell for esterification initially; then the generated esters underwent sequential and exclusive hydrogenolysis steps over the CoPt core to yield valerate esters. The high industrial application prospect of this reaction pathway was additionally highlighted by producing 12 kinds of valeric biofuels from 2-furoic acid and the corresponding C1 ∼ C7 primary, secondary, and tertiary alcohols.
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RSC Advances
·
2025
·Vol. 15
·期 42
·34861-34873
·
IF 4.6
Minjun Yin,Hongting Pu
Despite the critical role of polybenzimidazole (PBI) in high-temperature membranes in fuel cells, its practical deployment remains hindered by inherent limitations including low molecular weight (<20 kDa), poor solution processability, and irreversible network formation upon conventional synthesis. To address these challenges, a dynamic covalent strategy was introduced, leveraging Diels–Alder (DA) chemistry for topological reconfiguration. By subjecting furan-functionalized PBI prepolymer (PBI-furan, Mn = 8.2 kDa) to bismaleimide chain extension, we achieve a fourfold increase in molecular weight (Mn = 32 kDa), yielding a reversibly crosslinked PBI-DA membrane. Compared to traditional PBI with the same molecular weight, this architecture synergistically integrates exceptional thermal stability (>450 °C onset decomposition), robust mechanical strength (tensile strength >80 MPa), suppressed phosphoric acid swelling (<10%) and elevated ionic conductivity. Crucially, the dynamic network enables cyclic reprocessability and autonomous self-healing, retaining >90% of the initial mechanical properties after three tensile cycles. Compared to static PBI networks, this system reduces irreversible chain entanglement, while maintaining performance parity. By deeply integrating dynamic covalent chemistry with PBI materials, this work not only advances the performance of high-temperature proton-exchange membranes but also establishes a novel framework for the sustainable design of green energy devices, presenting significant scientific merit and engineering application potential.
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