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Comparative Study on the Effect of Cerina and Alumina on the Catalytic Activity of CuO-ZnO Based Catalyst in CO2 Hydrogenation to Methanol 铈和氧化铝对基于 CuO-ZnO 的催化剂在 CO2 加氢制甲醇中催化活性影响的比较研究
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-13 DOI: 10.1007/s10562-024-04756-1
Allam Djaouida, Hocine Smain, Thomas Sébastien, Parkhomenko Ksenia, Roger Anne-Cécile, Kaci Samira

Ternary Cu/ZnO/Al2O3 and Cu/ZnO/CeO2 catalysts were prepared by polyol method and tested for gas-phase low-temperature methanol synthesis from hydrogenation of CO2. The catalysts were characterized by N2 physisorption, SEM–EDX, XRD, H2-TPR and XPS. The activity of the catalysts was evaluated in a fixed-bed micro-reactor at atmospheric pressure and 40 bar at different reaction temperatures, and H2/CO2 ratio of 3:1. The results showed that the nature of the promoter influenced the physicochemical properties of the catalysts as well as the catalytic activity and product selectivity. Compared with ternary Cu/ZnO/Al2O3 catalyst, Cu/ZnO/CeO2 catalyst indicated that modifcation of CuO/ZnO catalyst with CeO2 promoted the CuO dispersion, reduced the CuO crystallite size, decreased the reduction temperature of highly dispersed CuO, decreased the activation energy and improved the catalytic activity of the Cu/ZnO/CeO2 catalyst.

Graphical Abstract

采用多元醇法制备了 Cu/ZnO/Al2O3 和 Cu/ZnO/CeO2 三元催化剂,并进行了二氧化碳加氢气相低温合成甲醇的测试。催化剂的表征包括 N2 物理吸附、SEM-EDX、XRD、H2-TPR 和 XPS。在固定床微反应器中,在常压和 40 巴、不同反应温度以及 H2/CO2 比为 3:1 的条件下,对催化剂的活性进行了评估。结果表明,促进剂的性质影响了催化剂的理化性质以及催化活性和产品选择性。与 Cu/ZnO/Al2O3 三元催化剂相比,Cu/ZnO/CeO2 催化剂表明,用 CeO2 对 CuO/ZnO 催化剂进行改性可促进 CuO 的分散,减小 CuO 结晶尺寸,降低高度分散 CuO 的还原温度,降低活化能,提高 Cu/ZnO/CeO2 催化剂的催化活性。
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引用次数: 0
Inhibition Mechanism of H2O on CO Oxidation Over CeMnOx Catalyst in Iron Ore Sintering Flue Gas 铁矿烧结烟气中 H2O 对 CeMnOx 催化剂氧化 CO 的抑制机理
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-09 DOI: 10.1007/s10562-024-04733-8
Long Ding, Hexi Zhao, Lei Ni, Zhongbin Wang, Lixin Qian, Hongming Long

The emission of CO in sintering flue gas contributes to environmental pollution and energy wastage. Achieving full oxidation of CO presents a viable strategy for elevating the sintering flue gas temperature by over 50°C, thereby significantly reducing energy consumption during the heating of flue gas in NH3-SCR denitrification systems. In this work, MnCeOx catalysts were synthesized under various conditions, including different calcination temperatures, durations, and molar ratios. Their catalytic activity and resistance to H2O were evaluated under simulated sintering flue gas conditions at different temperatures. Our findings indicated that the M8C1 catalyst exhibited exceptional activity, achieving CO conversion rates exceeding 95% within 125–250°C. However, the catalytic activity experienced a notable decline during the H2O resistance test at 150°C, while remaining unaffected at 250°C. Investigating the inhibition mechanism of H2O on CO oxidation at varying temperatures through H2-TPR, O2-TPD, and in situ DRIFTS. At lower temperatures (150°C), CO and O2 adsorption on the catalyst surface led to the formation of CO2, with O2 adsorption exerting a more significant influence on activity, consistent with the Langmuir–Hinshelwood mechanism. Introduction of H2O into the flue gas resulted in the formation of OH, which competed with CO and O2 for adsorption on the catalyst surface, thereby diminishing catalyst oxidation activity due to competitive adsorption hindering CO and O2 adsorption. Conversely, at higher temperatures (250°C), the reaction process between CO and lattice oxygen to produce CO2 followed the Mars-van Krevelen mechanism. Notably, at these temperatures, no adsorbed OH were detected on the catalyst surface, leaving the activity unaffected. Based on our research, employing the MnCeOx catalyst during the high-temperature stage in conjunction with the NH3-SCR catalyst is recommended for enhanced CO oxidation efficiency in sintering flue gas treatment processes.

Graphical Abstract

烧结烟气中 CO 的排放会造成环境污染和能源浪费。实现 CO 的完全氧化是将烧结烟气温度提高 50°C 以上的可行策略,从而显著降低 NH3-SCR 脱硝系统烟气加热过程中的能耗。在这项工作中,MnCeOx 催化剂是在不同条件下合成的,包括不同的煅烧温度、煅烧时间和摩尔比。在不同温度下的模拟烧结烟气条件下,对催化剂的催化活性和抗 H2O 能力进行了评估。研究结果表明,M8C1 催化剂具有优异的活性,在 125-250°C 的温度范围内,CO 转化率超过 95%。然而,在 150°C 的耐 H2O 试验中,催化活性明显下降,而在 250°C 时则不受影响。通过 H2-TPR、O2-TPD 和原位 DRIFTS,研究不同温度下 H2O 对 CO 氧化的抑制机制。在较低温度(150°C)下,CO 和 O2 在催化剂表面的吸附导致 CO2 的形成,其中 O2 的吸附对活性的影响更为显著,这与 Langmuir-Hinshelwood 机制一致。在烟气中引入 H2O 会形成 OH-,与 CO 和 O2 竞争吸附在催化剂表面,由于竞争吸附阻碍了 CO 和 O2 的吸附,从而降低了催化剂的氧化活性。相反,在较高温度(250°C)下,CO 和晶格氧生成 CO2 的反应过程遵循 Mars-van Krevelen 机理。值得注意的是,在这些温度下,催化剂表面未检测到吸附的 OH-,活性未受影响。根据我们的研究,建议在高温阶段将 MnCeOx 催化剂与 NH3-SCR 催化剂结合使用,以提高烧结烟气处理工艺中的 CO 氧化效率。 图文摘要
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引用次数: 0
A Piezoelectric Electrospun Nanofiber mat (Kaolin/PVDF) for the Degradation of Methylene Blue in Water 用于降解水中亚甲基蓝的压电电纺纳米纤维垫(高岭土/聚偏二氟乙烯
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-08 DOI: 10.1007/s10562-024-04765-0
Simanye Sam, Babatope O. Ojo, Soraya P. Malinga, Nonhlangabezo Mabuba

Organic compounds of various classes have been identified as major pollutants commonly detected in several environmental freshwaters. As a potential solution, electrospun mat-like nanofibers comprising polyvinylidene fluoride (PVDF) nanofibers and kaolin clay composite were synthesized for the degradation of methylene blue dye in wastewater using piezocatalytic technique. The kaolin/PVDF composites were characterized with SEM, XRD, FTIR, Chronoamperometry and electrochemical impedance spectroscopy. The poling of the piezoelectric charges of the electrospun mat-like nanofibers, enhanced by the presence of the crystalline nature of the kaolin clay occasioned the generation of reactive species upon exposure to ultrasonic vibration. Moreover, ultrasound waves in the system prevented passivation of the mat’s active surface during piezocatalysis through continuous cleaning action. A degradation efficiency of 100% was obtained from the degradation of methylene blue dye using the synthesized kaolin/PVDF composites during piezocatalysis. This result positions the nanofiber as an effective catalyst in wastewater treatment applications.

Graphical Abstract

各类有机化合物已被确定为一些环境淡水中常检测到的主要污染物。作为一种潜在的解决方案,利用压电催化技术合成了由聚偏二氟乙烯(PVDF)纳米纤维和高岭土复合材料组成的电纺毡状纳米纤维,用于降解废水中的亚甲基蓝染料。利用扫描电镜、X 射线衍射、傅立叶变换红外光谱、慢性阻抗仪和电化学阻抗光谱对高岭土/PVDF 复合材料进行了表征。高岭土的结晶性质增强了电纺垫状纳米纤维压电电荷的极性,使其在受到超声波振动时产生反应物。此外,系统中的超声波通过持续的清洁作用,防止了压催化过程中垫子活性表面的钝化。利用合成的高岭土/PVDF 复合材料在压催化过程中降解亚甲基蓝染料,降解效率达到 100%。这一结果将纳米纤维定位为废水处理应用中的一种有效催化剂。
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引用次数: 0
Effective Electrochemical Nitrogen Reduction through π Back-donation Process in Mn3+ of Mn-doped g-C3N4 通过掺杂锰的 g-C3N4 中 Mn3+ 的 π 背负过程实现有效的电化学氮还原
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-08 DOI: 10.1007/s10562-024-04772-1
Yijin Ma, Yinpeng Lu, Chang Li, Liangqing Hu, Hexin Zhang, Jing Feng

Ammonia (NH3) synthesis via nitrogen reduction reaction under mild conditions is challenging due to the difficulty of activating nitrogen. Herein, Mn-doped g-C3N4 (x-Mn-CN, x = 5, 10, and 15) catalysts with efficiency NRR performance were synthesized. The resulting 5-Mn-CN exhibits higher NRR performance (NH3 yield rate: 15.2 μg h−1 mgcat−1, Faradaic efficiency: 7.1%) at -0.4 V (vs. RHE) than others. It is found that the active sites of Mn3+ are generated by electron transfer from Mn2+ to the N of g-C3N4, and active N2 through the π back-donation process. This is evidenced by the experimental result that the NH3 yield rate of 5-Mn-CN significantly decreases from 15.2 μg h−1 mgcat−1 to 2.6 μg h−1 mgcat−1 after lowering the concentration of Mn3+. The concentration of Mn3+ is reduced by treating the catalyst in the ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) solution. This study enhances the understanding of N2 activation and provides insights into the transition metal-doped g-C3N4 as NRR catalysts.

Graphical Abstract

由于氮难以活化,在温和条件下通过氮还原反应合成氨(NH3)具有挑战性。在此,我们合成了具有高效 NRR 性能的掺锰 g-C3N4(x-Mn-CN,x = 5、10 和 15)催化剂。与其他催化剂相比,5-Mn-CN 在-0.4 V(相对于 RHE)电压下表现出更高的 NRR 性能(NH3 产率:15.2 μg h-1 mgcat-1,Faradaic 效率:7.1%)。研究发现,Mn3+ 的活性位点是通过 Mn2+ 与 g-C3N4 的 N 之间的电子转移产生的,而活性 N2 则是通过 π 反向捐赠过程产生的。实验结果表明,降低 Mn3+ 浓度后,5-Mn-CN 的 NH3 产率从 15.2 μg h-1 mgcat-1 显著降至 2.6 μg h-1 mgcat-1。在乙二胺四乙酸二钠盐(EDTA-2Na)溶液中处理催化剂可降低 Mn3+ 的浓度。这项研究加深了人们对 N2 活化的理解,并为过渡金属掺杂的 g-C3N4 作为 NRR 催化剂提供了深入的见解。
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引用次数: 0
Influence of the Activation Method of Rh-Sn-B/γ-Al2O3 Catalysts on the Selective Hydrogenation of Oleic Acid to Oleyl Alcohol Rh-Sn-B/γ-Al2O3 催化剂活化方法对油酸选择性加氢转化为油醇的影响
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-05 DOI: 10.1007/s10562-024-04769-w
María A. Vicerich, María A. Sánchez, Cristhian Fonseca Benítez, Vanina A. Mazzieri

The selection of an appropriate preparation method is crucial to enhance catalytic performance and optimize the resources used in catalyst synthesis. Achieving improvements in conversion rates, desired product yields are essential for increasing interest and competitiveness in the industrial sector. This study aims to analyze the influence of the preparation method of Rh(1%)-Sn(4%)/γ-Al2O3 catalysts on the selective hydrogenation of oleic acid to oleyl alcohol. Results from temperature-programmed reduction (TPR), cyclohexane dehydrogenation (DHC), and X-ray photoelectron spectroscopy (XPS) clearly demonstrate that incorporating sodium borohydride in the preparation process results in a stronger interaction between Rh and Sn. The degree of interaction between Rh and Sn is significantly influenced by the catalyst preparation and activation method, with a strong interaction promoting selectivity towards the formation of oleyl alcohol.

Graphical Abstract

选择合适的制备方法对于提高催化性能和优化催化剂合成过程中的资源使用至关重要。提高转化率和理想的产品收率对于增强工业领域的兴趣和竞争力至关重要。本研究旨在分析 Rh(1%)-Sn(4%)/γ-Al2O3 催化剂的制备方法对油酸选择性加氢制取油醇的影响。温度编程还原 (TPR)、环己烷脱氢 (DHC) 和 X 射线光电子能谱 (XPS) 的研究结果清楚地表明,在制备过程中加入硼氢化钠会增强 Rh 和 Sn 之间的相互作用。催化剂的制备和活化方法对 Rh 和 Sn 之间的相互作用程度有显著影响,强相互作用会提高生成油醇的选择性。
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引用次数: 0
Development of Magnetic Immobilized Cellulase Biocatalysts for Saccharification of Paper Waste 开发用于废纸糖化的磁性固定化纤维素酶生物催化剂
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-05 DOI: 10.1007/s10562-024-04767-y
Malihe Hadadi, Alireza Habibi

Saccharification of cellulosic material is crucial before utilizing it as the feedstock of fermentation processes. This study focuses on developing of robust catalysts for enzymatic hydrolysis of paper waste. Cellulase enzyme was immobilized on Fe3O4 magnetic nanoparticles (MNPs) via multi-covalent bonds. Therefore, the attachments of MNPs were performed by three approaches (3-aminopropyl)triethoxysilane (APTES) (Method I), polyethyleneimine (PEI) (Method II), and both monolayer molybdenum disulfide and PEI (MoS2-PEI) (Method III). The biocatalysts were characterized using Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA). The immobilization yield and loading efficiency of cellulase were determined at 38.65% and 162 mg g−1 in Method I, 13.33% and 31 mg g−1 in Method II, and 14.38% and 33 mg g−1 in Method III. The specification of the biocatalysts was determined for the hydrolysis of filter paper, carboxymethylcellulose (CMC), microcrystalline cellulose, and cellobiose. The total cellulase activity was 2.77, 0.943, 1.38, and 2.02 µmolGlucose mgEnzyme−1 h−1for free-cellulase and the immobilized biocatalysts prepared by Method I, II, and III, respectively. The prepared biocatalyst in Method I maintained 54.54% of its original activity after five cycles, which was more robust than Method II (20.25%) and Method III (12.33%). Further studies were performed on the saccharification of paper waste. The results showed the biocatalyst obtained by Method II resulted in 5.8 folds of higher glucose than the free-cellulase. The highest glucose recovery of about 72.47% was achieved after 48 h using the immobilized biocatalyst prepared by Method II.

Graphical Abstract

在将纤维素材料用作发酵工艺的原料之前,对其进行糖化处理至关重要。本研究的重点是开发用于酶水解废纸的强效催化剂。纤维素酶通过多共价键固定在 Fe3O4 磁性纳米粒子(MNPs)上。因此,通过三种方法(3-氨丙基三乙氧基硅烷(APTES)(方法 I)、聚乙烯亚胺(PEI)(方法 II)以及单层二硫化钼和 PEI(MoS2-PEI)(方法 III))对 MNPs 进行了附着。利用傅立叶变换红外(FTIR)和热重分析(TGA)对生物催化剂进行了表征。经测定,方法 I 中纤维素酶的固定化产率和负载效率分别为 38.65% 和 162 mg g-1,方法 II 中分别为 13.33% 和 31 mg g-1,方法 III 中分别为 14.38% 和 33 mg g-1。测定了生物催化剂水解滤纸、羧甲基纤维素(CMC)、微晶纤维素和纤维生物糖的规格。用方法 I、II 和 III 制备的游离纤维素酶和固定化生物催化剂的总纤维素酶活性分别为 2.77、0.943、1.38 和 2.02 µmolGlucose mgEnzyme-1 h-1。方法 I 中制备的生物催化剂在五个周期后保持了 54.54% 的原始活性,比方法 II(20.25%)和方法 III(12.33%)更强。对废纸糖化进行了进一步研究。结果表明,用方法 II 获得的生物催化剂比游离纤维素酶产生的葡萄糖高 5.8 倍。采用方法 II 制备的固定化生物催化剂在 48 小时后的葡萄糖回收率最高,约为 72.47%。
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引用次数: 0
Effect of Pore Structure on the Performance of Mo-Ni Catalysts for Petroleum Resin Hydrogenation 孔结构对石油树脂加氢用 Mo-Ni 催化剂性能的影响
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-04 DOI: 10.1007/s10562-024-04768-x
Tong Niu, Zhengyang Shi, Jinchang Sun, Qianwen Zhang

The modification of petroleum resin (PR) by catalytic hydrogenation is an upgrading technology for producing high-value-added hydrogenated petroleum resin (HPR) from of pyrolysis petroleum by-product. This research employed alumina supports with different pore size distributions to prepare supported Mo-Ni type catalysts and investigated their catalytic hydrogenation performance on C9 petroleum resin. Catalysts prepared with bimodal pore alumina (BPA) supports effectively overcome the limitations of internal diffusion and increase the quantity of active sites, thus increasing the catalytic activity for hydrogenation. The experimental results demonstrated that MoNi/BPA achieved a hydrogenation degree of 99.94% for HC9PR, with the hydrogenated product having a Pt–Co colour of 2.37 Hazen. After 140 h of reaction, the hydrogenation degree of HC9PR remained at 96.51%, and the Pt–Co colour value was lower than 40 Hazen. This investigation confirms that solving the mass transfer issues of petroleum resin molecules in the pores of supported catalysts is key to designing efficient hydrogenation catalysts for petroleum resin.

Graphical Abstract

催化加氢改性石油树脂(PR)是利用热解石油副产品生产高附加值加氢石油树脂(HPR)的升级技术。本研究采用不同孔径分布的氧化铝载体制备了支撑型 Mo-Ni 催化剂,并考察了它们在 C9 石油树脂上的催化加氢性能。采用双峰孔氧化铝(BPA)载体制备的催化剂有效地克服了内部扩散的限制,增加了活性位点的数量,从而提高了催化加氢的活性。实验结果表明,MoNi/BPA 对 HC9PR 的氢化率达到 99.94%,氢化产物的铂-钴色度为 2.37 Hazen。反应 140 小时后,HC9PR 的氢化率仍为 96.51%,铂-钴色度值低于 40 Hazen。这项研究证实,解决石油树脂分子在支撑催化剂孔隙中的传质问题是设计高效石油树脂加氢催化剂的关键。
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引用次数: 0
Cu2O/SBA-3 Possess Intrinsic High Protease-Like Activity for Efficient Hydrolysis of Protein Under Physiological Conditions Cu2O/SBA-3 具有内在的高蛋白酶样活性,可在生理条件下高效水解蛋白质
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-03 DOI: 10.1007/s10562-024-04747-2
Daomei Chen, Guo Xiao, Jian Tang, Lixia zhao, Sicong Li, Lingli Li, Bin Li, Tao Lei, Jiaqiang Wang

Developing efficient artificial proteases still remains a great challenge due to the high stability of peptide bonds. Nanozymes have attracted great attention for their high stability, low cost and inherent physicochemical properties, providing new opportunities to break through natural enzyme inherent limitations, but the intrinsic mimic proteases properties of nanomaterials were seldom explored. Herein, we describe for the first time that SBA-3 supported Cu2O (Cu2O/SBA-3) exhibited excellent protease-like activity to hydrolysis of bovine serum albumin (BSA) and casein under neutral conditions, which is even superior to natural proteases (trypsin) and most of the other protease mimics under identical conditions. It exhibited surprisingly high catalytic activity and possessed good stability. As the first example of protease mimics consist of metallic compounds and mesoporous materials, Cu2O/SBA-3 has many advantages, such as easy preparation and separation, high activity and stability, mild reaction conditions, which makes this catalytic system have multiple of potential applications in biological systems.

Graphical Abstract

由于肽键的高稳定性,开发高效的人工蛋白酶仍然是一项巨大的挑战。纳米酶因其高稳定性、低成本和固有的理化特性而备受关注,为突破天然酶的固有限制提供了新的机遇,但纳米材料的内在模拟蛋白酶特性却很少被探索。在此,我们首次描述了 SBA-3 支持的 Cu2O(Cu2O/SBA-3)在中性条件下水解牛血清白蛋白(BSA)和酪蛋白时表现出的类似蛋白酶的优异活性,甚至优于相同条件下的天然蛋白酶(胰蛋白酶)和大多数其他蛋白酶模拟物。它表现出惊人的高催化活性和良好的稳定性。作为首例由金属化合物和介孔材料组成的蛋白酶模拟物,Cu2O/SBA-3 具有易于制备和分离、高活性和稳定性、反应条件温和等诸多优点,这使得该催化体系在生物系统中具有多种潜在应用。
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引用次数: 0
Synthesis and Improving the Crystallinity of a Squaranine Covalent Organic Framework by Modifying the Preparation Method and Using it as a Green and Metal-Free Catalyst for the Synthesis of Enaminone 通过改进制备方法合成并提高宝瓶宁共价有机框架的结晶度,并将其用作合成烯胺酮的绿色无金属催化剂
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-03 DOI: 10.1007/s10562-024-04770-3
M. Sadegh Ramezani, Sadegh Safaei, Zahra Goodarzi, Mahsa Moradi

Herein, a modified synthesis method was presented and the effect of using an aqueous acetic acid solution in the process of synthesizing SQCOF was investigated. Adding a catalytic amount of aqueous solution of acetic acid as a co-catalyst has contributed to improving the quality of crystallinity. Effective parameters in the synthesis of SQCOF, including the concentration and volume of the co-catalyst and reaction solvent, were optimized. Then, the prepared SQCOF was used as a metal-free catalyst with Brønsted acid groups in the condensation reaction between 1,3-dicarbonyl compounds and primary amines. SQCOF was used under solvent-free conditions for the synthesis of enaminones at ambient temperature by mild manual grinding with a mortar and pestle and showed excellent catalytic performance in the above reaction. High performance and efficiency (62 to 96%), high TOF (833 to 1283 h−1), short reaction time, easy operation, minimizing the consumption of toxic organic solvents, absence of heavy metals in the framework and green conditions are the main advantages of this study. Also, SQCOF shows good chemical stability and recyclability (7 runs) and acts as an efficient catalyst in the synthesis of β-enaminones.

Graphical Abstract

本文介绍了一种改进的合成方法,并研究了在合成 SQCOF 的过程中使用醋酸水溶液的效果。添加一定量的醋酸水溶液作为辅助催化剂有助于提高结晶质量。优化了合成 SQCOF 的有效参数,包括助催化剂和反应溶剂的浓度和体积。然后,将制备的 SQCOF 用作带有布氏酸基的无金属催化剂,用于 1,3-二羰基化合物与伯胺的缩合反应。在无溶剂条件下,用研钵和研杵进行温和的手工研磨,将 SQCOF 用于在常温下合成烯酮类化合物,并在上述反应中表现出优异的催化性能。性能和效率高(62% 至 96%)、TOF 高(833 至 1283 h-1)、反应时间短、操作简便、减少有毒有机溶剂的消耗、框架中无重金属以及绿色环保是该研究的主要优点。此外,SQCOF 还具有良好的化学稳定性和可回收性(7 次运行),是合成 β-烯丙酮的高效催化剂。
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引用次数: 0
Highly Efficient CuCoLa Catalyst for the Direct Hydrogenation of Furfural to Pentanediols 将糠醛直接加氢转化为戊二醇的高效 CuCoLa 催化剂
IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-07-02 DOI: 10.1007/s10562-024-04771-2
Yongjia Liang, Jianliang Zuo, Zhaohao Cai, Jing Lin, Zili Liu

The direct conversion of furfural (FA) from biomass to pentanediols (PeDs), including 1,2-PeD and 1,5-PeD, is important for replacing fossil resources and developing bio-based polyesters from renewable sources. However, achieving high selectivity for the C–O hydrogenation of the furan ring remains a significant challenge. In this study, we synthesized a series of trimetallic CuCoLa catalysts, using a coprecipitation method with various metal ratios. The reduced CuCoLa catalyst with a metal ratio of 1/3/1, exhibited the highest activity for the selective hydrogenolysis of FA to PeDs. Under optimal reaction conditions (160 °C, 4 MPa H2 for 9 h), CuCoLa(1/3/1)-R achieved yields of 21.7% for 1,2-PeD and 50.1% for 1,5-PeD. Furthermore, the catalyst remained stable after five cycles of FA conversion to PeDs. The high selectivity for PeDs is attributed to the synergistic interaction between Cu and Co and the appropriate number of basic surface sites.

Graphical Abstract

将生物质中的糠醛(FA)直接转化为戊二醇(PeDs),包括 1,2-戊二醇和 1,5-戊二醇,对于替代化石资源和利用可再生资源开发生物基聚酯非常重要。然而,实现呋喃环 C-O 氢化的高选择性仍然是一项重大挑战。在本研究中,我们采用共沉淀法,以不同的金属比例合成了一系列三金属 CuCoLa 催化剂。金属比为 1/3/1 的还原型 CuCoLa 催化剂在选择性氢解 FA 至 PeDs 的过程中表现出最高的活性。在最佳反应条件下(160 °C,4 兆帕 H2,9 小时),CuCoLa(1/3/1)-R 的 1,2-PeD 产率为 21.7%,1,5-PeD 产率为 50.1%。此外,该催化剂在经过五个 FA 向 PeDs 转化周期后仍然保持稳定。PeDs的高选择性归功于Cu和Co之间的协同作用以及适当数量的碱性表面位点。
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引用次数: 0
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Catalysis Letters
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