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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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Fen Qiao,Zaisi Zhong,Jikang Zhao,Wenjie Liu
Cu-Ni 3 S 2 /NF with varying Cu doping levels were synthesized via a two-step hydrothermal method to investigate Cu's role in enhancing Ni 3 S 2 's alkaline hydrogen evolution reaction (HER). Optimal Cu doping reduced the overpotential to 193.4 mV and Tafel slope to 87.21 mV·dec −1 at 10 mA·cm −2 in 1 M KOH, alongside achieving high conductivity and the largest electrochemical active area (910 cm 2 ). HER performance peaked then declined with excessive Cu, confirming an optimal doping threshold. DFT calculations revealed Cu modulates Ni 3 S 2 's work function and charge transport, elucidating HER enhancement mechanisms. This work provides insights for optimizing Ni 3 S 2 -based HER catalysts through controlled heteroatom doping.
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DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Xinyu Wang,Juan Xu,Ying Li,Yuhao Zhang,Xin Wu,Caixia Kan
Cu nanowires (NWs) have been a research hotspot in the field of metal NWs because of their excellent electrical conductivity, optoelectronic properties, mechanical properties and low price. However, the instability of Cu NWs leads to the loss of conductivity, which largely limits their application in optoelectronic functional devices. Here, we propose an aqueous-phase synthesis method for the direct synthesis of Cu@Au composite NWs. Cu@Au NWs/Poly (ethylene terephthalate) (PET) flexible transparent conductive films (FTCFs) were prepared through vacuum filtration of Cu@Au NWs. The stability tests of Cu@Au NWs/PET FTCFs were performed, and the results showed that the resistance of the Cu@Au NWs/PET films remained stable within 60 days, which was much better than that of the Cu NWs/PET FTCFs. The conductivity and transmittance of the Cu@Au NWs/PET FTCFs remained high stability after 10,000 bending cycles. To expand the applicability of Cu@Au NWs/PET films in electromagnetic shielding, the softer Cu@Au NWs/Poly (L-lactic acid) (PLLA) FTCFs were prepared via spin-coating process, and the film with a square resistance of 5 Ω/sq displayed excellent electromagnetic shielding performance with an electromagnetic shielding efficiency value of up to 32 dB in the X-band.
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DOI
高影响因子
ChemCatChem
·
2025
·
IF 3.9
Minglu Zhu,Yuyin Wang,Minghao Du,Xing Zhang,Haoyu Liu,Zhihua Qiao,Juanjuan Yang,Bo Peng,Lei Nie,Zhenglong Li
The catalytic conversion of bio-ethanol to butanol is a pivotal reaction for producing renewable fuels and chemicals from non-edible biomass. Developing non-noble metal-based catalysts that exhibit high activity and stability is of great importance, yet remains a substantial challenge. Herein, Cu/LDH catalyst (Cu supported on MgAl layered double hydroxide), was synthesized via simple impregnation without further calcination, and demonstrated for the activity enhancement of ethanol-to-butanol reaction with superior conversion/yield than previous reports of LDH-derived materials. The catalytic activity of Cu/LDH-150(Red) catalyst is attributed to the interaction between Cu and LDH, induced by the pre-reduction during synthesis. It has been further revealed that the Cu species provides redox sites for dehydrogenation/hydrogenation reactions, promoting the critical initial reaction step ethanol dehydrogenation to acetaldehyde. And pre-reduction of Cu/LDH catalyst facilitates the reduction of Cu 2+ to Cu 0 /Cu + and promotes the incorporation of Cu into the interlayer of LDH, as evidenced by XPS and mechanistic validation with acetaldehyde feed, responsible for the activity enhancement. Graphical A non-noble Cu/MgAl-LDH catalyst, synthesized via simple impregnation without calcination, efficiently converts bio-ethanol to butanol. Pre-reduction enhances activity by generating Cu 0 /Cu + species and structural integration, providing redox sites for key ethanol dehydrogenation to acetaldehyde. This design offers a high-performance, stable catalyst for renewable fuels.
研究领域:
催化化学
·
可再生能源
·
可持续化学
·
材料科学
·
生物质转化
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产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Kun Lei,Jinyang Feng,Yuna Sun,Donghua Wu,Xiujian Zhao,Xiao Ma
Doped Cu + glass was prepared by ion exchange method. It was found that the accumulation zone of copper ions would be formed on the glass surface during the process of ion exchange, and there was an extreme point of copper ion distribution concentration about 10 µm inside the glass surface after ion exchange. The exchange depth of copper ions in the sample increased with the increase of ion exchange time. At low ion exchange temperatures, the Cu elements exchanged into the vitreous body exists in the form of Cu + and Cu 2+ . With the exchange of Cu + into the glass, the degree of polymerization of the glasses continued to increase. By raising the ion exchange temperature, a large number of spherical Cu 2 O grains formed on the surface of the sample, continuing to raise the temperature, these spherical grains agglomerated and adhered to form lamellae structure, mainly composed of oxides of Cu 2 O and CuO. The PL spectra showed that the ion-exchanged glass exhibited broadband blue-green emission light with a central wavelength of 468 nm and half-height width of 154 nm under 290 nm excitation. The luminescence intensity appeared to increase firstly and then decrease with increasing the ion exchange time. Dispersed spherical Cu 2 O grains were generated on the surface of the sample exchanged at 410 °C for 16 h. Co-composite luminescence of the spherical Cu 2 O semiconductor and the Cu + doped in the glass effectively increased the luminescence intensity of the samples. In addition, the samples showed a favorable thermal stability of luminescence.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CRYSTENGCOMM
·
2014
·Vol. 16
·期 38
·9054-9062
·
IF 3.858
Zongjian Liu,Yuanyuan Chen,Yifan Zheng
We propose a novel strategy for the synthesis of materials with a hierarchical structure. This strategy is based on in situ combination of two processes, namely, capping agent-mediated oriented growth and stirring-induced aggregation, and the growth of Cu crystals in the presence of linear alkyl diamines of short carbon chain length under vigorous stirring is shown to demonstrate its feasibility. Our experimental results have shown that the oriented growth of Cu nanowires can be significantly disturbed by vigorous stirring, resulting in large-scale growth of hierarchical dendritic Cu crystals. The morphology of grown dendritic Cu crystals has been found to vary with the stirring rate, type of diamine, and diamine concentration, which makes it possible to prepare hierarchical Cu structures of various morphologies. The growth mechanism of these hierarchical Cu structures is proposed based on the experimental observations. The present unique strategy offers a fresh way to fabricate materials with a hierarchical structure.
研究领域:
材料科学
·
化学
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DOI
高影响因子
MOLECULES
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2022
·Vol. 27
·期 9
·2933
·
IF 4.927
Yiran Wang,Fengxue Duan,Xiaoting Liu,Bao Li
Counter-cations are essential components of polyoxometalates (POMs), which have a distinct influence on the solubility, stabilization, self-assembly, and functionality of POMs. To investigate the roles of cations in the packing of POMs, as a systematic investigation, herein, a series of triol-ligand covalently modified Cu-centered Anderson-Evans POMs with different counter ions were prepared in an aqueous solution and characterized by various techniques including single-crystal X-ray diffraction. Using the strategy of controlling Mo sources, in the presence of triol ligand, NH4+, Cu2+and Na+were introduced successfully into POMs. When (NH4)6Mo7O24was selected, the counter cations of the produced POMs were ammonium ions, which resulted in the existence of clusters in the discrete state. Additionally, with the modulation of the pH of the solutions, the modified sites of triol ligands on the cluster can be controlled to form δ- or χ-isomers. By applying MoO3in the same reaction, Cu2+ions served as linkers to connect triol-ligand modified polyanions into chains. When Na4Mo8O26was employed as the Mo source to react with triol ligands in the presence of CuCl2, two 2-D networks were obtained with {Na4(H2O)14} or {{Na2(H2O)4} sub-clusters as linkers, where the building blocks were δ/δ- and χ/χ-isomers, respectively. The present investigation reveals that the charges, sizes and coordination manners of the counter cations have an obvious influence on the assembled structure of polyanions.Keywords:polyoxometalate;Anderson-Evans;triol ligand;cation-modulation
研究领域:
无机化学
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材料科学
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DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 21
·7378-7385
·
IF 5.721
Mengna Ding,Fengyan Shi,Huijuan Zhu,Yuping Yang,Jiahui Zhong,Liulin Luo,Yuning Huo,Hexing Li
A hybrid Cu2O/TiO2 composite loaded on a Cu mesh (Cu2O/TiO2@Cu mesh) was developed via a supercritical solvothermal route. A uniformly distributed Cu2O/TiO2 p–n hetero-junction was stably coated on a Cu mesh, benefiting the visible-light harvesting. In comparison to electrochemistry and visible-light photocatalysis, the photoelectrochemistry process on the photoanode of the Cu2O/TiO2@Cu mesh presented improved bacterial inactivation activity for Acinetobacter baumannii. By means of the main active species of ˙O2− radicals, the photoelectrocatalytic process on the Cu2O/TiO2@Cu mesh also realized complete leakage of K+ ions, much stronger mineralization of the cell membrane and more efficient elimination of the self-recovery function, finally leading to cell death. In comparison, the electrochemistry process only led to the leakage of K+ ions without inactivation of bacteria, and the visible-light photocatalysis process induced partial leakage of K+ ions and cell mineralization after the death of most bacteria.
研究领域:
环境科学
·
材料科学
·
微生物学
·
光电催化
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DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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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.
研究领域:
催化化学
·
绿色化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2013
·
IF 1.977
Yu Ling,Na Zhang,Fei Qu,Ting Wen,Zhong Feng Gao,Nian Bing Li,Hong Qun Luo
An interesting, simple, and label-free strategy for the detection of hydrogen peroxide and glucose has been developed with polyethyleneimine (PEI)-capped copper nanoclusters as a fluorescence probe in aqueous solution. The PEI-templated Cu nanoclusters which we have synthesized have an average diameter of 1.8 nm and show a blue emission at 480 nm. In the presence of hydrogen peroxide, the fluorescence of the Cu nanoclusters is quenched. Similarly, glucose oxidase catalyzes the oxidation of glucose to gluconic acid and H 2 O 2 , so we can also use this probe to detect glucose. Because of the high zymolyte specificity of glucose oxidase, the detection of glucose has good selectivity. Under the optimized experimental conditions, the linear ranges for H 2 O 2 and glucose are 0.5–10 μM and 10–100 μM, respectively. And the detection limits for H 2 O 2 and glucose are 0.4 and 8 μM, respectively. Furthermore, we discussed the mechanism of fluorescence quenching which is caused by the interaction between H 2 O 2 and Cu nanoclusters. This sensing system has been applied successfully to the detection of glucose in human serum samples.
研究领域:
生物化学
·
分析化学
·
医学诊断
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DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Zhiqiang Xu,Xianhua He,Mingwei Liang,Lijuan Sun,Di Li,Kenan Xie,Li Liao
Catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) over high-performance non-noble metal catalysts is attracting intensive attention. Herein, we report a graphene supported Cu@Ni bimetallic nanowires catalyst by a facile liquid phase reduction method with the assistance of an external magnetic field. The morphology and structure of the composite are studied by SEM, TEM and XPS. The vibrating sample magnetometer (VSM) is used to analyze its magnetic properties . Owing to the synergistic effect of graphene and bimetallic nanowires, the catalyst shows superior catalytic performance and excellent stability. The results of catalysis exhibit an extraordinary rate constant (1.16 min −1 ) and activity factor (5.81 min −1 mg −1 ) at room temperature, which are much higher than a majority of non-noble metal catalysts, even noble metal catalysts. Also, compared with noble metal catalyst, the novel catalyst possesses ferromagnetism , which facilitates the separation of catalyst and reaction system, and guarantees recyclability. Moreover, a possible synergistic catalytic mechanism based on the fact that electron transfer between copper-nickel nanowires and graphene has been proposed. It is believed that the novel catalyst has a great importance for the application of nanowires in the field of catalysis.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
Nano Research
·
2021
·Vol. 14
·期 8
·2831-2836
·
IF 8.897
Mou Shiyong,Li Yonghao,Yue Luchao,Liang Jie,Luo Yonglan,Liu Qian,Li Tingshuai,Lu Siyu,Asiri Abdullah M.,Xiong Xiaoli,Ma Dongwei,Sun Xuping
The advancement of cost-effective and selective electrocatalyst towards CO 2 to CO conversion is crucial for renewable energy conversion and storage, thus to achieve carbon-neutral cycle in a sustainable manner. In this communication, we report that Cu 2 Sb decorated Cu nanowire arrays on Cu foil act as a highly active and selective electrocatalyst for CO 2 to CO conversion. In CO 2 -saturated 0.1 M KHCO 3 , it achieves a high Faraday efficiency (FE) of 86.5% for CO, at −0.90 V vs. reversible hydrogen electrode (RHE). The H 2 /CO ratio is tunable from 0.08:1 to 5.9:1 by adjusting the potential. It is worth noting that HCOO − product was totally suppressed on such catalyst, compared with Sb counterpart. The improving selectivity for CO could be attributed to the bimetallic effect and nanowire arrays structure.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
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