CATALYSIS TODAY
·
2020
·
IF 5.825
Mengmeng Jin,Linhao Yu,Hong Chen,Xueli Ma,Kai Cui,Zhe Wen,Zewei Ma,Yushuai Sang,Mengmeng Chen,Yongdan Li
Ce oxide-based catalysts with different molar ratio of Co/Ce (denoted as CoCe-x, x represents the Co to Ce ratio) were examined as the catalyst of 5-hydroxymethylfurfural (5-HMF) oxidation to 2,5-furandicarboxylic acid (FDCA). The Co to Ce ratio, catalyst amount and reaction temperature all have remarkable effects on yield and selectivity. Complete conversion of 5-HMF with 86.3 % selectivity of FDCA has been achieved over the CoCe-0.15 catalyst at 130 °C with 0.6 MPa O 2 pressure (gauge) for 4 h. The good performance is attributed to the high specific surface area and the high oxygen vacancy concentration to promote the mobility and adsorption of oxygen species. In addition, the CoCe-0.15 catalyst is reused for five times without significant activity loss. Finally, the reaction mechanism over the CoCe-0.15 catalyst under base-free condition is discussed. 5-HMF is oxidized by the lattice oxygen via Mars-van Krevelen mechanism with the redox of Ce 4+ /Ce 3+ and Co 3+ /Co 2+ , and the lattice oxygen is replenished by adsorbing and activating O 2 molecules.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zhefei Zhao,Minhao Chen,Fengjiao Jian,Siqi Wang,Linlin Zhang,Huajun Zheng
The electrochemical transformation of biomass-based compounds has been regarded as an economical and eco-friendly route. In this aspect, converting 5-hydroxymethylfurfural (HMF) to 2,5-bishydroxymethylfuran (BHMF) via electrocatalytic hydrogenation technology is a promising topic. Although Cu-based catalysts demonstrate excellent performance in numerous electrocatalytic hydrogenation processes, their efficacy in BHMF production requires further improvement. Herein, we report a nanodendritic CuAg-based electrocatalyst on copper foam (CF) substrates (CuAg/CF). The CuAg-based electrode exhibits superior performance with 96.9% of HMF conversion, 97.6% of BHMF selectivity, and 96.8% of faradic efficiency (FE), surpassing the pure Cu and Ag electrode. In-situ experiments combined with calculating analysis using density functional theory (DFT) demonstrate that the improved reactivity for BHMF generation on the CuAg bimetallic catalyst is owing to the regulated electronic structure of CuAg through the synergistic effect between Cu and Ag, which results in the facilitated adsorption of HMF and reduced reaction energy barrier of the rate-determining step, respectively.
研究领域:
化学工程
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材料科学
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可再生能源
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DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2021
·Vol. 38
·期 5
·899-905
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IF 3.309
Chen Binglin,Li Jiachen,Feng Yunchao,Le Kai,Zai Yuxia,Tang Xing,Sun Yong,Zeng Xianhai,Lin Lu
Algal biomass was converted into 5-aminolevulinic acid (5-ALA) in five chemical steps: conversion to 5-(chloromethyl)furfural (5-CMF), ammoniation, ring-opening (photo-oxidation), reduction, and hydrolyzation. Among them, we mainly focused on the 5-CMF production and the following ammoniation. To our knowledge, the mixed solvent catalytic system of deep eutectic solvent (DES) and low concentration hydrochloric acid is the first reported for the synthesis of 5-CMF from algal biomass, providing a 24.6% 5-CMF yield at 120 °C for 5 h. Potassium phthalimide (KPI) was employed as an ammoniation reagent with superb selectivity and activity instead of conventional sodium azide (NaN 3 ). Optimizing the experimental design, a 23.7% 5-ALA yield along with high purity (>96%) was achieved from 5-CMF, and the total 5-ALA yield was 5.8% from algal biomass. This work provides a green and mild pathway for 5-ALA production from algal biomass.
研究领域:
化学工程
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生物技术
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环境科学
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有机化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
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IF 3.8
Wenxuan Zhang,Chuqian Xiao,Yuhang Li,Chunzhong Li
5-Hydroxymethylfurfural (HMF) electrooxidation for 2,5-furandicarboxylic acid (FDCA) production has become a sustainable method for value-added products at the anode. Here, an amorphous NiMo composite oxide supported on nickel foam (NF) is fabricated for HMF electrooxidation (HMFOR) via one-step electrodeposition. The synthesized NiMo/NF delivers 98.3% FE toward FDCA at 1.5 VRHE and maintains FE above 90% during 10 h. In situ Raman spectroscopy proves the formation of the active species Ni3+-OOH during the reaction process. Due to the introduction of high-valent Mo6+, the Ni3+ active species can be stabilized and the adsorption of aldehyde in HMF can be promoted during the reaction process, thus enhancing the FDCA electrosynthesis performance.
研究领域:
材料科学
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电化学
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催化化学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
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2021
·Vol. 23
·期 46
·8027-8032
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IF 3.545
Fenghua Chen,Jie Fan,Xiuzhi Chen,Yanping Li,Chengfeng Liang,Shizhao Ren,Rongrong Xue
Polymorph control of 5-fluorouracil (5-FU) was achieved by ball milling. Form II was synthesized through one-step neat grinding of raw 5-FU (RFU), and Form III (a new polymorph) was obtained by neat grinding RFU twice. Forms II and III of 5-FU were prepared separately through ball milling with different amounts of ethanol as an additive at the same period without influencing each other.
研究领域:
药物化学
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制药工程
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产品关联
DOI
高影响因子
ENERGY & FUELS
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2022
·
IF 4.654
Jing Li,Suxia Ma,Rongji Cui,Nuo Xu,Ting Pei
Solid waste fly ash can encroach on land, contaminate the environment, and jeopardize human health. An alkali fusion method combined with a hydrothermal method was adopted to prepare fly ash-derived ZSM-5 molecular sieves, and a series of Fe/ZSM-5 catalysts were also prepared to test their catalytic performance in NO oxidation with H2O2. Moreover, the characteristics of catalysts synthesized by fly ash, as well as the relationship between the structure and the catalytic activity, were analyzed in detail through multiple characterization approaches. The results gave important insights into the active sites of catalytic oxidation. They concluded that 10% Fe/ZSM-5 had the best catalytic activity in which Fe sites and Brønsted acid sites collectively provided the catalytic functionality, and 92% NO removal efficiency was obtained achieved under optimal experimental conditions. This work provided a new way for recycling fly ash and developing low-cost catalysts for NO removal.
研究领域:
环境科学
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催化化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2013
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IF 5.825
Yanhong Zu,Panpan Yang,Jianjian Wang,Xiaohui Liu,Jiawen Ren,Guanzhong Lu,Yanqin Wang
Ru/Co 3 O 4 catalyst prepared by a simple coprecipitation method, was used to catalyze the conversion of 5-hydroxymethylfurfural (HMF) into 2,5-dimethylfuran (DMF) for the first time and exhibited excellent catalytic performance. 93.4% yield of DMF was achieved at relatively low reaction temperature and H 2 pressure (130 °C, 0.7 MPa). Further studies showed that Ru is responsible for hydrogenation, while CoO x species played important role in the hydrogenolysis of hydroxyl groups. Besides, this catalyst also displayed a good reusability and can be used for 5 times without loss of the activity.
研究领域:
化学工程
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催化化学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
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IF 4.8
Ting Wu,Xiang Zhang,Hongju Liang,Quan Wang,Chun-Ling Liu,Wen-Sheng Dong
The design of highly efficient and cost-effective catalysts for the conversion of biomass-derived 5-hydroxymethylfurfural (5-HMF) into sustainable liquid fuel 2,5-dimethylfuran (DMF) is both important and challenging. In this study, we developed a non-noble Co catalyst supported on SBA-15 (25Co/SBA-15). Our results demonstrate that this catalyst exhibits remarkable efficiency in selectively hydrodeoxygenating 5-HMF to DMF, achieving a DMF yield of 96.3 % with complete conversion of 5-HMF under mild reaction conditions (150 °C, 2.0 MPa H 2 for 2 h). Notably, the productivity rate of DMF reached an exceptional value of 19.1 mmol·gcat −1 ·h −1 , surpassing most previously reported catalysts in literature. Additionally, by utilizing two distinct solvents - N,N-dimethylformamide (N,N-DMF) resulting in a high yield of 2,5-bis(hydroxymethyl)furan (BHMF) and tetrahydrofuran (THF) yielding an even higher yield of DMF - our approach enables facile switching between these two products during hydrogenation over the Co/SBA-15 catalyst. Furthermore, our catalyst demonstrates excellent reusability and can be easily regenerated through calcination in air. The exceptional catalytic performance of the catalyst can be ascribed to the synergistic effect between metallic Co and adjacent Lewis acidic Co 2+ in CoO dispersed on the surface of SBA-15. A dual-site Langmuir–Hinshelwood–Hougen–Watson (LHHW) model was proposed for the hydrodeoxygenating 5-HMF to DMF.
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 8
·期 17
·4430-4439
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IF 5.365
Ziliang Yuan,Bing Liu,Peng Zhou,Zehui Zhang,Quan Chi
The selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) has attracted much attention in recent years. Cesium-doped manganese dioxide (Cs/MnOx) was prepared by a soft template method, and was found to be active for the selective oxidation of HMF to DFF with molecular oxygen. Various reaction conditions have been investigated, and DFF was attained with a high yield of 94.7% at a HMF conversion of 98.4% at 100 °C and 10 bar O2 in N,N-dimethylformamide. Cs/MnOx demonstrated much higher catalytic activity than un-doped MnOx, suggesting that the introduction of Cs into MnOx plays a crucial role in the oxidation of HMF to DFF. Kinetic studies demonstrated that the oxidation of HMF to DFF depends on both the HMF and oxygen concentration, with the reaction order being 0.44 and 0.53, respectively. Compared with other heterogeneous non-noble metal catalysts, Cs/MnOx demonstrated a much lower activation energy for the oxidation of HMF to DFF. The catalyst can be reused without much loss of catalytic activity, suggesting that the catalyst is highly stable. Furthermore, the direct production of HMF from fructose was also successfully realized by a one-pot reaction strategy via two consecutive steps.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
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2016
·Vol. 22
·期 3
·327-334
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IF 1.87
Liu Dongjing,Zhou Weiguo,Wu Jiang
Perovskite LaMnO 3 /ZSM-5 was used for reactive adsorption of hydrogen sulfide at 500–700 °C. The sorbents showed good desulphurization performance, the highest sulfur capacity of 1020 µmol S/g over 5La5Mn/ZSM-5 was obtained at 600 °C. The reducing gases (H 2 and CO) can obviously shorten the breakthrough time and reduce the sulfur capacity. Incorporating Mn ions into La 2 O 3 lattice improved the sulfidation activity due to the formation of perovskite LaMnO 3 with good reducibility and structure stability.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2022
·Vol. 97
·期 9
·2487-2495
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IF 3.709
Yutong Li,Bajin Chen,Shengpeng Wang,Meichao Li,Chunmei Li,Zhenlu Shen
BACKGROUND On the way to convert biomass-derived products as a renewable and environment-friendly source to high-value added chemicals, one great challenge is the effective control of selectivity in the reaction. Here, we contribute a heterogeneous catalysis method for selective transformation of biomass-based 5-hydroxymethylfurfural (HMF) into 2,5-diformylfuran (DFF) via multicomponent bismuth molybdate catalyst. The influence of the different pH value on the catalytic activity of the catalyst were investigated. In addition, to evaluate the catalytic performance of the catalyst in the selective oxidation of HMF, a variety of important reaction parameters such as the reaction temperature, catalyst amount, atmosphere, and solvent were examined. RESULTS The catalyst prepared with pH value in the range of 1–2 exhibits the optimal catalytic activity in the selective aerobic oxidation of the hydroxy group of HMF. As a result, the target compound of DFF could be obtained with excellent yield (99%) and high selectivity (> 99%) in the presence of 0.25 mg Co 9 Fe 3 BiMo 12 O 51 (pH = 1–2) in DMSO at 130 °C under O 2 atmosphere. In addition, the catalyst Co 9 Fe 3 BiMo 12 O 51 could be reused several times without a significant loss of its catalytic activity. CONCLUSION In this work, a heterogeneous catalytic approach to oxidizing HMF to DFF using Co 9 Fe 3 BiMo 12 O 51 as catalyst and molecular oxygen as oxidant was established. The O 2 temperature-programmed desorption (O 2 -TPD) characterization indicated that the pH value of co-precipitation obviously affected the oxygen mobility and storage capacities in the catalysts, which is related to the catalytic performance in the selective aerobic oxidation. © 2022 Society of Chemical Industry (SCI).
研究领域:
化学工程
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催化科学
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DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2024
·
IF 4.2
Cheng Wang,Fuling Du,Lipeng Wang,Qianru Yu,Xinchao Liang,Siqi Liu,Zhe Lei
TiO 2 /ZSM-5 composites with enhanced adsorption and photocatalytic properties were synthesized via regulation of synthesis pH value and post (acid/alkali) treatment of ZSM-5. The influences of synthesis pH values and post-treatment of ZSM-5 on microstructure, adsorption and photocatalytic properties of the composites were investigated. The methyl orange was used to assess the adsorption and photocatalytic properties of the samples. The results showed that the synthesis pH values and acid/alkali treatment had significant influences on the microstructure, adsorption and photocatalytic properties of TiO 2 /ZSM-5 composites. The composites synthesized at pH 7 had a relatively higher TiO 2 content, smaller anatase crystallite size, greater specific surface area, the most effective separation of photogenerated electron-hole pairs, the fastest interfacial charge transfer, and therefore exhibited excellent adsorption and photocatalytic properties. Acid treatment could significantly increase the specific surface area, Si/Al ratio of ZSM-5, the separation efficiency of photogenerated electron-hole pairs, and amount of produced active free radicals •O 2 – and •OH. The TiO 2 /acid-treated ZSM-5 exhibited excellent photodegradation with 99.3 % methyl orange in 150 min, which is higher than that of the TiO 2 /ZSM-5 and TiO 2 /alkali-treated ZSM-5.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）