Sustainable Energy & Fuels
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2025
·
IF 4.1
Anran Zhu,Zhufan Zou,Ai-Qin Wang,Cong Yu,Yinghua Yin,Ning Li
2,5-Bis(furan-2-ylmethyl)cyclopentan-1-one (FCFDH), a C15 precursor for renewable jet fuel range cycloalkane and high-value electronic photolithography material, was selectively synthesized via a cascade aldol condensation/hydrogenation reaction of furfural and cyclopentanone under solvent-free conditions. Non-noble metal Cu and Ni modified MgAl-hydrotalcite (Cu-Ni/MgAl-HT) was found to be an effective and stable catalyst for this reaction. Under the optimized conditions (423 K, 4 MPa H₂, 10 h), 97.0% cyclopentanone conversion and 82.0% carbon yield of FCFDH were achieved. Based on the characterization results, the presence of Ni and Cu species increased the acidity of MgAl-HT and formed Ni-Cu alloy particles with an average size of 2.33 nm during the preparation of catalyst. Both effects facilitate the aldol condensation of furfural and cyclopentanone and the formation of FCFDH by the selective hydrogenation of C=C bond.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Zesheng Deng,Songchang Hu,Jiahui Ji,Shiqun Wu,Haijiao Xie,Mingyang Xing,Jinlong Zhang
Cu is widely used to prepare high-value products in photocatalytic CO 2 reduction reaction (CO2PR). The valence state of transition metals usually has a great impact on the catalytic process. However, the research on Cu valence in CO2PR is lack for its complex valence change. In current work, Cu x /P25 with stable Cu valence composition in CO2PR is prepared. The results show that Cu is composed of Cu 0 and Cu 2 O, and their proportions change regularly as Cu loading changing, which are linearly related to the selectivity of the corresponding products of CO2PR. Combined with thermodynamic and kinetic analysis, the CO adsorption and activation on the surface of Cu 0 and Cu 2 O are considered to be the key to determine the product of CO2PR, which is further confirmed by DFT calculation. Cu 0 and Cu 2 O are proved to be active site of producing CH 4 and CO, respectively. In this case, a reference for the study of highly selectivity Cu based photocatalysts is provided.
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ChemCatChem
·
2024
·
IF 3.8
Pengchao Ren,Zhenzhou Zhang,Tingting Hu,Zhihui Fan,Shanshan Dang,Sifan Cheng,Weifeng Tu,Yi-Fan Han
Graphical The apparent rate coefficients for CH 3 OH synthesis from CO hydrogenation are a single-valued function of the CO 2 -to-CO ratio in the contacting gas phase, because this ratio determines the extent of surface oxidation of Ce 2 O 3 to CeO 2 , the relative abundance of surface Ce 3+ , and in turn the density of Cu 0 -Ce 3+ sites pair on the working Cu/CeO 2 catalyst. This study investigated the dynamic structure of a working Cu/CeO 2 catalyst and its catalytic consequences for CH 3 OH synthesis via CO hydrogenation by kinetics, high-precise chemical titration, and a series of in situ X-ray spectroscopies. We have revealed that the apparent rate coefficients for CH 3 OH synthesis from CO hydrogenation are a single-valued function of the CO 2 -to-CO ratio in the contacting gas phase. This ratio determines the extent of surface oxidation of Ce 2 O 3 to CeO 2 , the relative abundance of surface Ce 3+ and Ce 4+ sites, and in turn, the density of Cu 0 -Ce 3+ sites pair on the working Cu/CeO 2 catalyst, although the chemical state of Cu and elemental distribution of both Cu and Ce were insensitive to the ratio. The reactivity of CH 3 OH formation and the Cu 0 -Ce 3+ sites decrease monotonously with an increase in the CO 2 -to-CO ratio. The direct connection of the reactivity and the oxidant-to-reductant ratio appears to be general for heterogeneous catalysis, for which the oxidant oxidizes metal atoms. In contrast, the reductant scavenges surface oxygen atoms, thus dictating the density of surface sites and their thermodynamic activities.
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MOLECULES
·
2025
·Vol. 30
·期 2
·225
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IF 4.6
Jieqiong Wang,Jingyi Yang,Zezheng Bing,Yuanyuan Gao,Tao Yang,Qiaoyun Liu,Meng Zhang,Zhongyi Liu
Controllable hydrogenation of carbonyl groups (C=O) is crucial for converting furfural into high-value furfuryl alcohol. Instead of traditional impregnation method, a novel Cu-based catalyst (Cu/SiO2) is prepared using the ammonia evaporation method (AE) for the efficient hydrogenation of furfural to furfuryl alcohol under mild conditions. At the reaction conditions of 90 °C and 1 MPa H2, the 5Cu/SiO2-AE sample showed optimal performance with higher turnover frequency (36.0 h−1) and furfuryl alcohol selectivity (>99.9%). After five cycles, the catalyst recycled still showed a high reaction activity and selectivity for furfuryl alcohol. Characterization results such as XRD, H2-TPR, FT-IR, and XPS showed that the excellent catalytic performance of 5Cu/SiO2-AE catalyst was attributed to the formation of layered copper silicate and the high dispersion of Cu species. Furthermore, the formation of layered copper silicate resulted in a higher ratio of Cu+/(Cu0+Cu+) at a reduction temperature of 250 °C, which was also responsible for the optimum activity. This work showed the importance of controllable synthesis of layered copper silicate in improving the catalytic performance of copper-containing catalyst.
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MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Lulu Cui,Weijie Shi,Houshen Li,Xiuxian Zhao,Shiyun Ai,Xiangju Meng,Shuhong Sun,Zeyi Guo
For bimetallic nanozymes, the closeness between the two elements is closely related to their properties, but achieving tight contact between the two components still faces challenges. Herein, copper was introduced by the coordination effect between the organic ligand in Ce-MOF and Cu 2+ , then a series of Cu-CeO 2 nanozymes were obtained by thermal treatment. The content of copper can be easily controlled and the spindle-shaped structure assembled by multilayer flakes can be obtained. The total antioxidant capacity (TAC) detection program based on the excellent peroxidase (POD)-like activity of the as-prepared Cu-CeO 2 nanozyme showed a wide linear detection range and ideal detection limits for ascorbic acid (AA), glutathione (GSH), Trolox and cysteine (Cys). More importantly, this method can be applied in TAC detection of commercial samples. This work provided a method for the design of high performance bimetallic nanozymes and developed a sensor that can be applied to detect TAC in vitamin C tablets and beverages.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kai Liu,Qikui Fan,Zhun Qiao,Zhixue Zhang,Yongzhao Zhang,Zhiqun Chen,Hao Ma,Zemin He,Zongcheng Miao,Jiaofei Huo,Duqiang Xin,Jianxin Guo,Chuanbo Gao
Plate-like metal nanomaterials have attracted much interest due to their anisotropy, high aspect ratio and large surface area. The synthesis of non-noble metal nanocrystals with high purity remains challenging due to the poor regulation mechanism of their seeds, which limits their property and application studies. This paper presents a selective etching mechanism that effectively facilitates the identification and dissolution of non-target seeds during the synthesis of Cu nanoplates. This innovative approach not only enables the production of highly pure nanoplates but also allows for the shape transformation of nanoparticles into nanoplates. The resulting Cu nanoplates exhibit tunable localized surface plasmon resonance (LSPR) characteristics and high enhanced performance in surface-enhanced Raman scattering (SERS). This method offers a novel approach to the synthesis and purification of metal nanocrystals.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Shuang Xu,Lei Yang,Congya Wang,Liwei Pan,Jing Zhang,Yaling Wang,Hexiang Zhong
With the rapid development of industry, large-scale fossil energy consumption leads to the increase of atmospheric CO2 concentration and the resultant deteriorating global warming. The electrochemical reduction of CO2 (ERCO2) technology is a potential strategy to achieve the CO2 emissions reduction and to realize carbon recycling. However, the lack of high product selective, active and stable catalysts is one of the remaining challenges for the industrial applications of ERCO2. Herein, an electrochemical oxidation-reduction reconstruction method is developed to reconstruct the copper network without extra Cu salt addition obtaining Cu2O-Cu (111) catalysts with nanoporous structures for improving the selectivity and activity of CH4 and C2H4 product. The oxidation-reduction reconstruction derived catalyst achieves improved faradaic efficiency of 56.63% for CH4 product and a partial current density of 41.6 mA cm-2 at -1.38 V (vs. RHE). The selectivity and activity toward C2H4 are also improved. The catalytic superiority originates from synergistic interplay between the Cu₂O-Cu heterogeneous interface and high electrochemical active surface area. Additionally, the presence of abundant oxygen vacancies at the Cu2O-Cu interface accelerate the electron transfer process and promote the high selectivity and activity toward CO2-to-CH4. This study paves a new way for enhancing the selectivity and activity of CO2 electrocatalytic conversion to CH4.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Kaikai Xu,Lulu Kong,Kebin Ye,Beibei Xu,Yongming Deng,Yicheng Wang,Shaohua Wei
Phthalocyanine (Pc) is a promising class of metalloantibiotics with antibacterial properties, akin to many metalloantibiotics, that exerts its effect by disrupting the bacterial respiratory chain. Therefore, it is particularly crucial to develop simple and efficient antibacterial strategies to enhance the activity of antibiotics. The construction of metal–organic frameworks (MOFs) helps to improve the electron transfer ability of phthalocyanine antibacterial drugs and enhance their antibacterial activity. In this study, we report the synthesis of a two-dimensional (2D) NiPc-Cu MOF using a modified liquid–liquid interfacial method, offering a facile, scalable, and stable approach. The excellent electron transfer properties of the MOF significantly enhance the ability of NiPc to disrupt the respiratory chain, thereby boosting its antibacterial activity. Compared to NiPc alone, NiPc-Cu MOF demonstrated a 1000-fold reduction in the minimum inhibitory concentration (MIC 50 ) against Escherichia coli ( E. coli ), reaching 4 ng/mL—a level surpassing most reported metalloantibiotics and comparable to clinically used antibiotics. Furthermore, NiPc-Cu MOF selectively targets bacteria with minimal cytotoxicity to animal cells. Based on this, we have developed NiPc-Cu MOF as a safe antibacterial coating for catheters, characterized by excellent stability and superior antibacterial activity. This study provides a straightforward and effective strategy for enhancing the activity of molecular drugs that exert antibacterial effects by interfering with the respiratory chain.
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Materials Today Communications
·
2025
·
IF 4.5
Yuwen Pan,Guoning Ji,Boyao Zhang,Xin Li,Yongqi Tian,Shuangshuang Zhang,Depeng Zhao,Rongda Zhao,Fufa Wu,Lihua Miao
Electrocatalytic technology serves as a critical pathway for clean energy conversion, where high-entropy alloys demonstrate outstanding catalytic performance owing to their unique multi-principal-element design. This work systematically investigates Cu x (CoCrNiFe) 100-x HEAs as cost-effective bifunctional catalysts for both freshwater and seawater electrolysis. The optimized Cu 50 (CoCrNiFe) alloy exhibits excellent catalytic activity with low overpotentials of 248.3 mV for HER and 327 mV for OER at -10 mA cm -2 in alkaline freshwater, along with remarkable stability (<5% decay after 24 hours). Notably, in alkaline seawater electrolyte, it achieves even better HER performance (234 mV) while maintaining comparable OER activity, and demonstrates exceptional 50-hour durability in overall water splitting tests. These findings not only provide new insights into HEA-based catalyst design but also highlight the great potential of such materials for practical large-scale hydrogen production from seawater resources, representing a significant step toward sustainable energy solutions.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Kai Xiong,Ying Zhou,Johannes Karges,Kejie Du,Jinchao Shen,Mingwei Lin,Fangmian Wei,Junfeng Kou,Yu Chen,Liangnian Ji,Hui Chao
Chemotherapy continues to be the most commonly applied strategy for cancer. Despite the impressive clinical success obtained with several drugs, increasing numbers of (multi)drug-resistant tumors are reported. To overcome this shortcoming, novel drug candidates and delivery systems are urgently needed. Herein, a therapeutic copper polypyridine complex encapsulated in natural nanocarrier apoferritin is reported. The generated nanoparticles showed higher cytotoxicity toward various (drug-resistant) cancer cell lines than noncancerous cells. The study of the mechanism revealed that the compound triggers cell autophagy-dependent apoptosis. Promisingly, upon injection of the nanodrug conjugate into the bloodstream of a mouse model bearing a multidrug-resistant colon tumor, a strong tumor growth inhibition effect was observed. To date, this is the first study describing the encapsulation of a copper complex in apoferritin that acts by autophagy-dependent apoptosis.
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PubMed
高影响因子
Journal of Physical Chemistry C
·
2018
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IF 4.484
Tengfei Long,Hongmei He,Jizhou Li,Mengke Yuan,Jianjia Wei,Zhongde Liu
Inspired by the knowledge that the chiroptical activity of Cu and Ag nanoclusters (NCs) is generally about several-fold larger than that of the corresponding Au NCs but poor stability and that alloy metal particles often demonstrate unique stability, in this contribution the synthesis of the chiral Au–Cu alloy NCs was attempted via reduction of varying mole fractions of metal precursors by sodium borohydride in the presence of d-/l-penicillamine (d-/l-Pen), to gain insights into the alloying effect on the chiroptical activity. As a result, the g factors of ∼0.57 × 10–3, obviously larger than that of the pure Au NCs, are found for the bimetallic Au–Cu NCs, suggesting that the incorporation of Cu heteroatoms plays a dramatic role for the creation of the strong optically active metal nanostructures. More importantly, compared with those of monometallic Cu counterparts, the optical active stability of bimetallic Au–Cu NCs is obviously improved because of the alloy formation. The location of the copper dopant, observed from the transmission electron microscopy results and deduced by the X-ray photoelectron spectroscopy measurements, can be speculated to be incorporated in both the “core” region and the “staple” region. Additionally, it was found that the different thiolated chiral molecule ligands exert influence on the chiroptical behavior of the Au–Cu NCs. Thus, the alloy formation strategy could produce novel nanostructures with the characteristic of large and stable chiroptical activity.
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International Journal of Materials Research
·
2022
·Vol. 113
·期 4
·295-305
·
IF 0.678
Yanbing Yin,Hang Yang,Zhaosong Xin,Guopeng Xu,Yang Liu,Guohua Dong,Jie Ma
In this work, a novel MOF (metal organic framework) based composite of β-BCoPc/Cu-BTC is fabricated by immobilizing β-aryloxy phthalocyanine cobalt (β-BCoPc) on Cu-BTC (benzenetricarboxylic acid-Cu) via a facile impregnation approach. After a systematic characterization via X-ray diffraction, X-ray photoelectron spectroscopy, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and N 2 adsorption–desorption isotherms, the above-synthesized catalyst is for the first time applied to photocatalytically decompose refractory malachite green (MG) dye pollutant under UV light irradiation. In comparison with that of the β-BCoPc or Cu-BTC monomers, the synthesized β-BCoPc/Cu-BTC composite shows a significantly enhanced photocatalytic degradation performance of MG with a best degradation efficiency up to 90.12 %, which can easily be attributed to the synergistic effect between the Cu-BTC and β-BCoPc effectively improving light utilization efficiency, accelerating charge transportation and reducing charge recombination due to the desirable properties such as the conjugacy of the MOFs skeleton, the positive catalytic activity of central ion and large specific surface area, etc. In conclusion, the present work provides an effective and novel strategy via preparing MOF-based composite catalyst to realize the photocatalytic degradation of MG.
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