JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2016
·
IF 3.958
Chen Zhang,Tao Wang,Xiao Liu,Yunjie Ding
A series of copper-promoted platinum supported on activated carbon (Cu-Pt/AC) catalysts were investigated for glycerol oxidation to lactic acid. The catalytic performance of 1.0%Pt/AC catalyst was greatly influenced by Cu loading (0.1–2.0 wt%). Among them, the 0.5%Cu–1.0%Pt/AC catalyst showed the best promotional effect, whose lactic acid yield was 2.4 times of that on 1.0%Pt/AC under same reaction conditions. Characterizations were carried out to explore the relationships between catalyst properties and reaction performances. TEM images show that the introduction of Cu improves the dispersion of Pt and Cu, and some Pt-Cu interfaces are detected by HR-TEM, which would facilitate the glycerol transformation. XPS and H 2 -TPR analyses reveal that good catalyst performance is related with not only a proper surface Pt/Cu molar ratio, but also copper species’ oxidation states. Cu + and Cu 0 species favor glycerol conversion and lactic acid production, whereas large CuO particles facilitate the formation of glyceric acid.
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高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2015
·Vol. 117
·期 1
·239-251
·
IF 1.17
Geng Gaoli,Wei Ruiping,Liang Ting,Zhou Minghao,Xiao Guomin
A series of Cu–Ca–Al hydrotalcite derived catalysts were prepared by the co-precipitation method. Their catalytic activities were evaluated in the hydrogenolysis of glycerol. The catalysts were characterized by XRD, SEM, TEM, ICP, NH 3 -TPD, CO 2 -TPD and H 2 -TPR. It was observed that the incorporation of calcium and aluminum in the Cu–Ca–Al catalyst improved the conversion of glycerol and promoted the generation of 1,3-PDO. This is due to the appropriate acidity and basicity of the catalyst, which is confirmed by NH 3 -TPD and CO 2 -TPD. The conversion of glycerol over the catalyst with a Cu–Ca–Al mole ratio of 1:3:5 was up to 73.2 % with 42.6 % selectivity to 1,2-PDO and 9.1 % selectivity to 1,3-PDO. Effects of the reaction time, reaction temperature and initial hydrogen pressure on the conversion and selectivity were systematically investigated.
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Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 3
·427-442
·
IF 11.534
Zhang Yu,Han Shuai,Wang Mingyuan,Liu Siwei,Liu Guiwu,Meng Xianfeng,Xu Ziwei,Wang Mingsong,Qiao Guanjun
One-dimensional nanofibers can be transformed into hollow structures with larger specific surface area, which contributes to the enhancement of gas adsorption. We firstly fabricated Cu-doped In 2 O 3 (Cu-In 2 O 3 ) hollow nanofibers by electrospinning and calcination for detecting H 2 S. The experimental results show that the Cu doping concentration besides the operating temperature, gas concentration, and relative humidity can greatly affect the H 2 S sensing performance of the In 2 O 3 -based sensors. In particular, the responses of 6%Cu-In 2 O 3 hollow nanofibers are 350.7 and 4201.5 to 50 and 100 ppm H 2 S at 250 °C, which are over 20 and 140 times higher than those of pristine In 2 O 3 hollow nanofibers, respectively. Moreover, the corresponding sensor exhibits excellent selectivity and good reproducibility towards H 2 S, and the response of 6%Cu-In 2 O 3 is still 1.5 to 1 ppm H 2 S. Finally, the gas sensing mechanism of Cu-In2O3 hollow nanofibers is thoroughly discussed, along with the assistance of first-principles calculations. Both the formation of hollow structure and Cu doping contribute to provide more active sites, and meanwhile a little CuO can form p–n heterojunctions with In 2 O 3 and react with H 2 S, resulting in significant improvement of gas sensing performance. The Cu-In 2 O 3 hollow nanofibers can be tailored for practical application to selectively detect H 2 S at lower concentrations.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Xiaona Liu,Yi Cao,Nana Yan,Chao Ma,Lei Cao,Peng Guo,Peng Tian,Zhongmin Liu
The high-temperature (HT) and low-temperature (LT) hydrothermal stabilities of molecular-sieve-based catalysts are important for the selective catalytic reduction of NO x with ammonia (NH 3 -SCR). In this paper, we report a catalyst, Cu 2+ loading SAPO-17, synthesized using cyclohexylamine (CHA), which is commercially available and inexpensive and is utilized in NH 3 -SCR reduction for the first time. After systematic investigations on the optimization of Si and Cu 2+ contents, it was concluded that Cu-SAPO-17-8.0%-0.22 displays favorable catalytic performance, even after being heated at 353 K for 24 h and at 973 K for 16 h. Moreover, the locations of CHAs, host–guest interaction and the Brönsted acid sites were explored by Rietveld refinement against powder X-ray diffraction data of as-made SAPO-17-8.0%. The refinement results showed that two CHAs exist within one eri cage and that the protonated CHA forms a hydrogen bond with O4, which indicates that the proton bonding with O4 will form the Brönsted acid site after the calcination .
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Bo Shen,Zhengqiu Chen,Junyu Chen,Ning Wang,Huaming Mao,Jungang Yin,Yu Ren,Wei Dai,Shuanglong Zhao,Hongwei Yang
The high dependence of the photovoltaic industry on the precious metal Ag has exacerbated its resource shortage and cost pressure, and there is an urgent need to develop low-cost, Cu-based alternative materials. In this study, the construction of a Cu@Ag core–shell structure is realized through the interface regulation strategy driven by glutamic acid (Glu) coordination, which effectively synergizes the high electrical conductivity of Cu and the antioxidant advantages of Ag. Combined with molecular dynamics simulation and electrochemical analysis, the three-stage process of adsorption–displacement–reduction of Ag layer growth is revealed. On the basis of this, according to the differences in the surface interface properties of different dimensional Cu-based materials, the “high-activity edge-selective passivation” (2D) and “dual-complexant gradient adjustment” (3D) strategies are adopted to optimize the coating path of the silver layer, so as to realize the multidimensional Cu@Ag core–shell structures. Finally, material performance characterization shows that the multidimensional Cu@Ag core–shell structure can significantly inhibit the oxidation of Cu nuclei. This study provides a new solution for the design of low-cost and high-performance materials in the fields of photovoltaic conductive pastes and flexible electronics as well as a new idea for interfacial engineering and large-scale preparation of multidimensional heterostructures.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mengyao Shi,Qiang Yin,Da Wang,Chengcheng Tian,Lei Zhou
The widespread presence of Cu(II) in aquatic environment has attracked increasing interests in Cu(II)-mediated advanced oxidation processes (AOPs) as a promising “two-birds-one-stone” strategies for environmental remediation. Organically coordinated Cu(II) systems offer dual benefits on facilitating efficient copper redox cycling and generating reactive species for pollutant degradation. However, the activation efficiency disparities among different peroxides and their underlying mechanisms remain poorly understood. Herein, this study presents a comprehensive comparison of organically-cooridinated Cu(II) activated peroxydisulfate (PDS), peroxymonosulfate (PMS) and hydrogen peroxide (H 2 O 2 ) systems, where ofloxacin (OFX) serving as coordinating ligand and target contaminant. Our results demonstrate enhanced activation for all the three peroxides, leading to significantly improved OFX degradation. High-valent copper species Cu(III) is identified as the primary working intermediate across all systems. The peroxides activation efficiency, OFX decay enhancement, and steady-state Cu(III) concentration consistently followed an order of PDS > H 2 O 2 > PMS. The performance differences among the three systems were governed by the initial contact probability between peroxides and copper center and the subsequent electron transfer efficiency, which is further verified by molecular dynamics (MD) simulations. This work establishes a quantitative framework for predicting peroxides activation properties in Cu(II)-mediated AOPs, offering fundamental insights for designing efficient dual-functional systems that combine heavy metal stabilization with organic pollutant degradation in wastewater treatment.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xujian Yang,Gao He,Jiarui Wang,Jilin Zhong,Yu Luo,Feng Jiang,Lile Dong,Xiang Li
To overcome the efficiency limitations of cuproptosis in oncology, we engineered a piezoelectric Cu-loaded Bi4Ti3O12 nanosheet system for synergistic cuproptosis and ROS-mediated tumor therapy. The incorporation of Cu2+ not only enhanced the material’s piezoelectric coefficient (d33 = 22.3 pm·V–1) but also facilitated valence-state modulation under ultrasound (US) stimulation. The resulting piezoelectric field significantly promoted charge separation, accelerating Cu2+/Cu+ conversion and boosting reactive oxygen species (ROS) generation. This strategy synergistically induces tumor cell death through a dual tumoricidal pathway: on one hand, the accumulation of Cu+ under US stimulation further amplifies cuproptosis, and on the other hand, the continuous accumulation of ROS triggers excessive oxidative stress. In a murine breast cancer model, this synergistic approach achieved a 90.6% tumor inhibition rate. This study pioneeringly combines piezoelectric material properties and copper valence transformation, providing insights for breast cancer treatment.
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DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 6
·1-14
·
IF 2.4
Yang Ke,Zhou Bo,Dong Kun,Wu Yan,Huang Qu,Lv Jingbo,Wan Ziyi,Yang Mingzhu
With the acceleration of industrialization and urbanization, the treatment of organic pollutants in water bodies has become a global problem. Photocatalytic technology is regarded as an ideal solution due to its green and efficient characteristics. However, traditional powder catalysts have the problem of difficult recovery. Using copper foam as the substrate to load photocatalysts is a feasible solution. Cu/CuO/Cu 2 O with a core–shell structure was prepared by a simple solvothermal method based on copper foam. Under visible light irradiation, the Cu/CuO/Cu 2 O catalyst has a high catalytic efficiency for Congo red (95% within 180 min) and a significant adsorption and degradation ability for tetracycline hydrochloride. The results of the density functional theory calculation and electrochemical tests reveal that a Schottky heterojunction forms between Cu 2 O and CuO, the band gap of Cu 2 O is 0.57 eV, and the free energy of Cu/CuO/Cu 2 O is 0.24 eV, close to 0 eV, revealing the ternary composite’s possibility to evolve hydrogen. The heterojunction generated by Cu 2 O and CuO improves the material’s charge transport efficiency. Furthermore, this ternary composite based on copper foam easy to recycle and reuse, and can maintain nearly 90% degradation efficiency after 8 cycles. This concept offers a method for planning and building interfaces in nanocomposite structures. Graphical
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Guofeng Wang,Shiwei Xu,Chao Deng,Yueyue Feng,Liying Huang,Qin Guo,Yajun Wang,Min Zhang,Qian Shi,Nannan Liu
Copper ions (Cu + and Cu 2+ ) are vital for physiological functions, and their imbalance is implicated in disease progression. However, simultaneous detection of both species is challenging due to their similar properties. Here, we report a dual-functionalized glass micropipette sensor enabling independent detection of Cu + and Cu 2+ . UiO-66-NH 2 was grown in situ on the inner wall to capture Cu 2+ via amino coordination, reducing ionic current. Glutathione-functionalized carbon nanotubes (GCNTs) coated on the outer surface bind Cu + , increasing SERS signal via enhanced surface defects. The sensor exhibits a wide detection range (10 -1 –10 5 μM), a detection limit of 0.1 μM, and allows simultaneous monitoring of Cu + /Cu 2+ in the physiological range (2–10 μM). It further distinguishes copper ion levels in MCF-10A and MCF-7 cells, revealing altered copper homeostasis in cancer. This platform offers a sensitive, selective tool for studying copper in biological systems.
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DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 3
·1658-1664
·
IF 4.6
Xiuping Li,Jiaqi Wang,Bolin Yin,Kaihong Liu,Jingjing Zhao,Bo Jiang,Hexing Li
The hydrogenation of carbon dioxide into profitable chemicals is a viable path toward achieving the objective of carbon neutrality. However, the typical approach for hydrogenation of CO2 heavily relies on thermally driven catalysis at high temperatures, which is not aligned with the goals of carbon neutrality. Thus, there is a critical need to explore new catalytic methods for the high-efficiency conversion of CO2. Herein, we present a new class of catalysts, featuring phosphorus-doped amorphous ruthenium nanoparticles supported on copper nanoparticles, which capitalizes on the plasmonic effects of copper to achieve the photothermal transformation of CO2 to CO within a gas–solid flow system. Our findings indicated that the reaction efficiency in the presence of photothermal energy was over eight times greater than that with thermal energy alone. The catalyst system exhibited nearly 100% selectivity towards CO under mild conditions, with an impressive CO yield of 123.16 mmol g−1 h−1. This study highlights the significant potential of amorphous metal phosphides in photocatalytic CO2 hydrogenation under mild conditions and offers a fresh avenue for the robust catalysis of amorphous materials.
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PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Chunhua Lin,Yue Du,Shiqi Wang,Li Wang,Yonghai Song
The work presents a novel glucose oxidase@Cu-hemin metal-organic frameworks (GOD@ Cu-hemin MOFs) with a ball-flower structure as bienzymatic catalysts for detection of glucose. The GOD@Cu-hemin MOFs exhibits great stability as compared with free horseradish peroxidase and GOD toward harsh conditions because the ball-flower-like shell of Cu-hemin MOF effectively protects from GOD. Thus, the GOD@Cu-Hemin MOFs can be used in external harsh conditions such as high temperature and acid/base. The GOD@Cu-hemin MOFs is capable of sensitive and selective detection of glucose via peroxidase-like of Cu-hemin MOFs and GOD by using 3,3′,5,5′-tetramethylbenzidine (TMB) as a substrate. Under the existence of glucose, O 2 is reduced into H 2 O 2 via GOD@Cu-hemin MOFs. The produced H 2 O 2 as well as Cu-hemin MOFs oxidize TMB into blue oxTMB which shows UV–Vis absorbance at 652. The absorption intensity of oxTMB linearly increases with the increasing concentration of glucose from 0.01 to 1.0 mM with detection limit of 2.8 μM. An integrated agarose hydrogel film (Aga/GOD@Cu-hemin MOF/TMB) sensor is rationally designed for colorimetric detection of glucose. The sensor displays a response range of 30 μM-0.8 mM with a detection limit of 0.01 mM. The result indicates that the Cu-hemin MOFs are an ideal carrier for the encapsulation of enzymes.
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高影响因子
FUEL
·
2020
·
IF 5.578
Bowen Lu,Zewu Zhang,Xiaoshan Li,Cong Luo,Yongqing Xu,Liqi Zhang
Cu catalysts have been widely used in CO 2 utilization due to their low reduction temperature and excellent CO 2 hydrogenation performance. It is important to well design Cu catalyst with high efficiency and durability for CO 2 hydrogenation. In this work, CuCe(rod) catalysts with various Cu contents were prepared. The physicochemical properties of the CuCe(rod) catalysts were described by XRD, TEM, N 2 -physisorption and H 2 -TPR.The effect of Cu content on catalytic performance of CO 2 hydrogenation with CuCe(rod) catalysts was also studied. Results showed that a high Cu content enhanced CO 2 conversion. The 40CuCe(rod) catalyst exhibited the best CO 2 conversion performance. At the reaction temperature of 400 °C, the CO production rate (CO 2 conversion) and CO selectivity based on the 40CuCe(rod) catalyst could reach 1.69 mol/g cat /h (41.1%) and nearly 100%, respectively. The analysis of kinetic measurements revealed that the activation energy of the 40CuCe(rod) catalyst was lower than that of other catalysts with different Cu contents during a reverse water–gas shift reaction. The lower activation energy and the interface structure of Cu-O x -Ce were closely related to CO 2 hydrogenation activity and remarkable stability for 96 h with minimal loss of CO 2 conversion activities.
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