CHINESE CHEMICAL LETTERS
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2017
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IF 1.932
Yan-Fu Ma,Hao Wang,Guang-Yue Xu,Xiao-Hao Liu,Ying Zhang,Yao Fu
A series of cobalt catalysts with different supports were prepared for the selective conversion of biomass-derived furfural to cyclopentanol (CPL) in one step. The best CPL yield was 82 mol% at 160 °C, 2 MPa H 2 , 4 h when cobalt was supported on ZrO 2 -La 2 O 3 . The supports were characterized by X-ray diffraction (XRD) and temperature-programmed desorption of ammonia (NH 3 -TPD). The XRD results indicated that the more stable t-ZrO 2 formed by doping La 2 O 3 . The amount of acid sites of the catalyst increased, too. The influences of parameters such as reaction temperature, hydrogen pressure, and reaction time on the catalytic activity were also investigated. The polymer formed during the reaction may cause the deactivation of the Co/ZrO 2 -La 2 O 3 catalyst. This work provides a possibility to prepare the stable t-ZrO 2 and apply with cobalt metal for biomass valorization.
研究领域:
化学工程
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生物质能
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DOI
高影响因子
GREEN CHEMISTRY
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2017
·Vol. 19
·期 5
·1308-1314
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IF 9.125
Zhibao Huo,Jiefeng Xiao,Dezhang Ren,Fangming Jin,Tian Wang,Guodong Yao
A new non-fermentative process for the transformation of biomass carbohydrates and lactic acid (LA) into propionic acid (PA) was first reported over a cobalt catalyst in water. The Co catalyst exhibited high catalytic activity for the formation of PA with Zn as a reductant. Various parameters, such as catalyst loading, Zn weight, water volume, temperature and reaction time, were investigated to improve the yield of PA, and the maximum value of 58.8% was achieved in the presence of 4 mmol Co and 10 mmol Zn in 7.5 mL H2O at 250 °C for 2 h. The recyclability of the Co catalyst showed that Co could be effectively repeated four times without the loss of activity. Moreover, the result showed that in situ-formed ZnO by oxidation of Zn in water could efficiently enhance the catalytic activity of the Co catalyst in the conversion of LA. Besides, direct conversion of carbohydrate biomass, such as glucose, cellulose and starch, or a similar compound such as glycolic acid also afforded the desired products. The present study provides great significance for practical application on the production of PA from LA and biomass carbohydrates.
研究领域:
化学工程
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可再生能源
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催化化学
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DOI
高影响因子
ACS Catalysis
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2018
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IF 11.384
Shuai Lyu,Li Wang,Jianghao Zhang,Chen Liu,Junming Sun,Bo Peng,Yong Wang,Kenneth G. Rappé,Yuhua Zhang,Jinlin Li,Lei Nie
In order to understand the role of Co catalysts with different phases on Fischer–Tropsch synthesis, single-phase face-centered-cubic (fcc) and hexagonal-close-packed (hcp) Co were synthesized via a two-step approach, involving the formation of single-phase CoO materials followed by reduction in H2. The physicochemical properties of Co catalysts were thoroughly characterized by XRD, SEM, TEM, TPR, and H2 chemisorption. It was found that hcp-Co exhibits higher activity on hydrocarbon formation than fcc-Co in Fischer–Tropsch synthesis. For both catalysts, CO dissociation was suggested as the rate-determining step, on which hcp-Co presents ca. 40 kJ mol–1 lower activation energy than fcc-Co, in agreement with a reported computational study. As a result, hcp-Co is concluded to be the preferable phase for rational catalyst design.
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
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Jiajia Chen,Xinyu Lu,Dandan Wang,Pengcheng Xiu,Xiaoli Gu
Lignin is the world's greatest renewable aromatic biofeedstock, and it has promising applications in high value-added chemical products. Herein, N-Co/ATP-CZO was used as a catalyst for the depolymerization of alkali lignin in ethanol and isopropanol systems, and explored the effects of formic acid (FA) amount, reaction time, reaction temperature and other factors on the depolymerization of alkali lignin. Among them, formic acid serves as both catalytic and in situ-hydrogen donor. Ultimately, the highest yield of bio-oil (59.28% (mass)), including 30.05% (mass) of monomer , was obtained after a reaction of FA to alkali lignin mass ratio of 4 and 240 °C for 8 h. Among the monomers, the yield of Guaiacol was the highest (5.94% (mass)), followed by 2-methoxy-4-methylphenol (5.74% (mass)). This study, the modification of attapulgite was carried out to reduce the acidity while enhancing the catalytic activity for depolymerization, and the selection of hydrogen donor was investigated. A feasible pathway for lignin depolymerization research was opened.
研究领域:
化学工程
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可再生资源科学
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2022
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IF 5.723
Le Gou,Longfei Xie,Yuanyuan Wang,Liyi Dai
The production of amine intermediates from biomass is capturing increasing attention. Herein, an efficient conversion of furfural to furfural amine over RuCo/AC catalyst under hydrothermal conditions has been investigated. The effects of different carriers, bimetals, and reaction conditions were systematically investigated in green solvents (water). Fully conversion of furfural and high furfural amine yield (92.13%) at 80 ℃ for 1 h over 4Ru1Co/AC. The excellent catalytic performance of 4Ru1Co/AC was attributed to its high acidity and good hydrogenation ability, as well as the synergistic effect between Ru-Co alloy formations and the activated carbon. Importantly, the highly selective preparation of furfural to furfural amine is a promising way to high-value utilization of cellulosic biomass in green solvents.
研究领域:
化学工程
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催化反应
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绿色化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Weimin Cao,Zeru Shen,Jiayi Li,Jingyu Li,Yiying Zhao,Qingran Zhang,Qiang Liu
Electrochemical oxidation of glycerol into value-added chemicals represents a sustainable approach for not only valorizing biomass resources but also improving the energy efficiency of electrolysis by replacing the kinetically sluggish oxidation of water at the anode. Here, we present a nickel (oxy)hydroxide supported cobalt nanoneedle arrays catalyst (CoNA-NiOH/NF-2) for effective oxidation of glycerol. The loaded Co(OH) 2 forms more oxygen defects, increases the active sites, and enhances the performance of glycerol oxidation. The CoNA-NiOH/NF-2 catalyst significantly reduces energy consumption by achieving a current density of 10 mA cm −2 at a low voltage of 1.22 V vs. RHE, and 100 mA cm −2 at 1.42 V vs. RHE, which is approximately 240 mV lower than oxygen evolution reaction (OER). Additionally, the Faraday efficiency of formate generation reached 98 %. The growth of renewable energy sources will greatly benefit from this strategy, which calls for replacing anodic OER with biomass oxidation.
研究领域:
化学工程
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可再生能源
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电化学
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产品关联
DOI
PubMed
高影响因子
ChemCatChem
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2021
·Vol. 14
·期 3
·e202101716
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IF 5.686
Yingying Zhang,Haibo Zhu,Qiangwen Fan,Liu Yang,Zongbo Xie,Zhang-Gao Le
Graphical Cobalt catalysis : An efficient cobalt-catalyzed redox-neutral sulfonylative coupling of boronic acids and ammonium salts to afford (hetero)aryl alkyl sulfones by using potassium metabisulfite has been realized. Various functional sulfones were obtained by using commercially available and air-stable CoCl 2 in combination with phenanthroline ligand. In addition, various carbon based electrophiles, including diaryliodonium salts, heteroaryl halides, and carbonates were compatible. This redox-neutral catalytic transformation proceeds well without additional base and shows broad functional-group tolerance. An efficient cobalt-catalyzed redox-neutral sulfonylative coupling to afford (hetero)aryl alkyl sulfones from boronic acids, ammonium salts and potassium metabisulfite has been realized. Commercially available and air-stable CoCl 2 , in combination with phenanthroline ligand, is sufficient to achieve rapid and high-yielding conversion of the reactants into the corresponding sulfones. This practical transformation proceeds smoothly through C−N bond cleavage under redox-neutral catalytic conditions and shows broad functional-group tolerance. Other carbon based electrophiles, including diaryliodonium salts, heteroaryl halides, and carbonates were compatible. Further transformation of aryl alkyl sulfones then allows conversion into olefins, alkenyl sulfones and halogenated sulfones, respectively, in a one-pot process.
研究领域:
有机化学
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催化化学
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2024
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IF 2.8
Chenwei Liu,Ran Jing,Yue Li,Daolai Sun,Jianhua Lv
Background Succinic acid is a vital platform chemical derivable from lignocellulosic biomass. Various non-noble metal catalysts were used to hydrogenate succinic acid and produce 1,4-butanediol in this study. Among them, Co-loaded SiO 2 with a moderate mean pore size of 10 nm exhibited a superior catalytic performance. Results The high catalytic activity of Co-loaded SiO 2 , which was prepared by an impregnation method, was demonstrated in the hydrogenolysis of succinic acid to provide 1,4-butanediol. The Co/SiO 2 catalyst reduced at 400 °C and calcined at 300 °C existed in the form of Co 2+ and Co 0 , exhibiting a high catalytic activity. The production of 1,4-butanediol from succinic acid was significantly enhanced at a temperature of 200 °C and an H 2 pressure exceeding 5 MPa. At 200 °C and 7 MPa H 2 pressure, a 1,4-butanediol selectivity of 67.8% and a full succinic acid conversion were obtained over Co/SiO 2 . Conclusion The Co-loaded SiO 2 with a moderate mean pore size of 10 nm was conducive to the efficient generation of 1,4-butanediol from succinic acid. The Co/SiO 2 catalyst reduced at 400 °C existed in the form of Co 0 and Co 2+ . It was suggested that the efficient synthesis of 1,4-butanediol from succinic acid was facilitated by the cooperative action of Co 0 and Co 2+ . © 2024 Society of Chemical Industry (SCI).
研究领域:
化学工程
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催化材料
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产品关联
DOI
高影响因子
ACS Catalysis
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2025
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IF 13.1
Guihua Yan,Paulina Pršlja,Gaofeng Chen,Jiahui Kang,Yongde Liu,Miguel A. Caro,Xi Chen,Xianhai Zeng,Bo Peng
Syngas conversion into higher alcohols represents a promising avenue for transforming coal or biomass into liquid fuels. However, the commercialization of this process has been hindered by the high cost, low activity, and inadequate C2+OH selectivity of the catalysts. Herein, we have developed Cu/Co carbon wood catalysts, offering a cost-effective and stable alternative with superior selectivity for catalytic conversion. The formation of Cu/Co nanoparticles was found, influenced by water-1,2-propylene glycol ratios in the solution, resulting in bidisperse nanoparticles. The Cu/Co-CW-W1P1 catalyst (the ratio between water and 1,2-propanediol is 0.5:0.5) exhibited a remarkable CO conversion rate of 74.8% and a selectivity of 58.7% for C2+OH, primarily comprising linear primary alcohols. This catalyst demonstrated enduring stability and selectivity under industrial conditions, maintaining its efficacy for up to 350 h of operation. We also employed density functional theory (DFT) to analyze selectivity, particularly focusing on the binding strength of CO, a crucial intermediate for subsequent reactions leading to the formation of alcohols. DFT identified the pathway of CHx and CO coupling, ultimately yielding C2H5OH. This computational understanding, coupled with the high performance of the Cu/Co-carbon wood catalyst, paves the way to develop catalytically selective materials tailored for higher alcohol production from a nature-based source.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2025
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IF 3.6
Jia-Wei Li,Shuai Shi,Xiao-Hong Chen,Mao-Gui Huang,Yong-Liang Ban,Hui Zhang,Yue-Jin Liu
Direct functionalization of native (N–H) indoles via C–H activation remains a challenge. Herein, we report a salicylaldehyde-promoted cobalt-catalyzed selective C2–H Heck reaction of native (N–H) indoles with both active and unactivated olefins in the presence of free N–H bonds. A series of structurally diverse C2-alkenylated native (N–H) indoles including natural product and drug derivatives were prepared directly and effectively without additional preprotection and deprotection procedures.
研究领域:
有机化学
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药物化学
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DOI
PubMed
高影响因子
PNAS Nexus
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2024
·Vol. 3
·期 2
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IF 2.2
Wu Jing-Hang,Yang Tian-Hao,Chen Fei,Yu Han-Qing
Aromatic amines (AAs), ubiquitous in industrial applications, pose significant environmental hazards due to their resistance to conventional wastewater treatments. Peracetic acid (PAA)-based advanced oxidation processes (AOPs) have been proposed as effective strategies for addressing persistent AA contaminants. While the organic radicals generated in these systems are believed to be selective and highly oxidative, acetate residue complicates the evaluation of AA removal efficiency. In this work, we explored transformation pathways of AAs in a representative Co(II)-catalyzed PAA system, revealing five side reactions (i.e. nitrosation, nitration, coupling, dimerization, and acetylation) that yield 17 predominantly stable and toxic by-products. The dominant reactive species was demonstrated as Co–OOC(O)CH3, which hardly facilitated ring-opening reactions. Our findings highlight the potential risks associated with PAA-based AOPs for AA degradation and provide insights into selecting suitable catalytic systems aimed at efficient and by-product-free degradation of pollutants containing aromatic –NH2.
研究领域:
环境科学
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化学工程
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yichi Zhang,Jingang Zhang,Dongping Sun,Jean-Marie Basset,Jingxia Qian,Lu Zhou
This study employed nonahydrate ferric nitrate and hexahydrate cobalt nitrate as precursors to fabricate catalysts via calcination, varying the iron-cobalt molar ratios (1: 5, 3: 4, 1: 1, 4: 3, 5: 1). It identified the optimal ratio for catalytic decomposition of methane (CDM) performance. Furthermore, adjusting the calcination temperature enabled control over the spinel content in catalysts with the optimal Fe: Co ratio (3: 4), resulting in a range of single and bimetallic catalysts with diverse spinel contents. Comparative analysis revealed the superior performance of bimetallic catalysts compared to single-metal counterparts. Specifically, under the conditions of 800 °C and GHSV 6 L/(g cat. ·h), Fe 3 Co 4 -700 °C achieved a maximum methane conversion of 75.6%, after maintaining a CDM test for 6 h, there is no decrease in stability. This is because the synergistic effect of Fe and Co bimetallic in the Fe 3 Co 4 -700 °C catalyst facilitates the transfer of charges between the bimetals, alters the surface charge density of the catalyst, enhances the electron donation capability of active sites, thereby favoring the adsorption and cracking processes of methane. XRD indicates that this catalyst with smaller crystallite size benefits the dispersion of catalytic active sites, thus improving the CDM performance. Results underscored the significant impacts of calcination temperature and metal ratio on the catalyst's spinel content and crystallite size. Characterization of spent catalysts unveiled carbon products primarily comprising carbon nano-onions, graphite, and carbon nanotubes, with the optimal catalyst yielding 5.8 g C /g cat. . Increasing calcination temperatures facilitated the formation of the spinel phase. At 150 °C, the Fe: Co (3: 4) catalyst had minimal spinel content, whereas at 300 °C, 700 °C, and 1000 °C, the contents are 9%, 11%, and 24%, respectively. Notably, at 1500 °C, the spinel content dramatically surged to 62%. The relationship between spinel content and spent catalyst crystallite size is not linear, the smaller crystal size is more conducive to the dispersion of catalytic active sites, thereby improving the CDM performance. Catalysts without spinel doping exhibited a crystallite size of around 32.2 nm, which decreased to 25.6 nm with 11% spinel content, and increased to 42.7 nm with 62% content. These findings yield profound insights into the influence of calcination temperature and iron cobalt ratios on catalyst performance, providing valuable guidance for the production of efficient CDM catalysts.
研究领域:
催化化学
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材料科学
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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）