ChemSusChem
·
2026
·Vol. 19
·期 1
·e202501680
·
IF 6.6
Jinlong Wu,Haiqiang Mu,Min Zhu,Xueru Zhao,Ting Zhang,Jiaxin Bai,Jin Zhang,Feng Li,Jing Li
Copper-based catalysts offer promise for CO 2 -to-C 2+ conversion but suffer from instability of Cu + species, which are active sites critical for enabling C−C coupling. In this work, we synthesized Lanthanum (La)-doped Cu x O (La-Cu x O) catalysts with varying La/Cu ratios to investigate how the interplay between doping-induced electronic effects and grain boundary (GB)-driven stabilization affects deep CO 2 reduction to C 2+ . Combined density functional theory calculations and in situ spectroscopic characterization reveal that the unique 4f orbital configuration and strong Lewis acidity facilitate charge transfer of La, stabilizing Cu + during CO 2 reduction reaction (CO 2 RR), while simultaneously inducing lattice distortion to increase GB density. This modulation preserves Cu + /Cu 0 interfaces while enhancing *CO dimerization kinetics. Furthermore, La doping boosts *CO coverage at GB-rich regions and lowers the C−C coupling barrier. The optimized La-Cu x O-2 catalyst (La/Cu = 0.224) achieves a 45.2% C 2 H 4 Faradaic efficiency (FE) and 75.4% C 2+ FE at −0.8 V RHE , with partial current densities of 87.5 and 146.7 mA cm −2 , respectively, surpassing undoped Cu x O. Remarkably, it retains more than 90% initial activity after 24 h operation, demonstrating exceptional stability. This work provides a rational strategy for stabilizing Cu + and tailoring pathways via rare-earth doping. Graphical La doping stabilizes Cu + /Cu 0 interfaces via electronic modulation and lattice distortion, enhancing grain boundary density in Cu x O catalysts for efficient CO 2 electroreduction. The optimized La-Cu x O-2 achieves 75.4% C 2+ Faradaic efficiency and 146.7 mA cm −2 partial current density at −0.8 V versus reversible hydrogen electrode, suppressing hydrogen evolution and enabling scalable CO 2 -to-C 2+ conversion.
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DOI
PubMed
高影响因子
Water Conservation Science and Engineering
·
2022
·Vol. 7
·期 4
·419-428
·
IF 0
Fu Wen-Qiang,Wen Yi,Tang Wen-Jun,Yao Zeng-Yu
Polymer-enhanced ultrafiltration (PEUF) is emerging as a competent technique for removing heavy metal contaminants from effluents. Biopolymers are prospective size-enhancers due to their abundant biodegradable and renewable nature. Melanin is a type of biopolymer that binds heavy metal ions effectively. Chestnut shell pigment (CSP) is the melanin extracted from an agro-waste. This study evaluated the feasibility of employing melanin in PEUF for heavy metal removal from wastewater by using CSP and Cu(II) as the model melanin and heavy metal, respectively. The effects of pH, Cu(II), and CSP concentrations in the feed solution on the Cu(II) removal were investigated. At the optimized condition of pH 6 and a loading ratio of 33.3, more than 99% of the copper was removed by a polyethersulfone membrane with a molecular weight cut-off of 50 kDa. The binding process was rapid, completed within 22 min, and fit well with the pseudo-second-order kinetic model. The binding equilibrium data fit well with the Langmuir isotherm with a maximum binding capacity of 0.8733 mmol·g −1 . Mg 2+ and Ca 2+ hindered the Cu(II) removal, while Na + and K + affected it negligibly. Before and after Cu(II) binding, the CSP samples were characterized using Fourier transform-infrared spectrometry. The cation exchange with H + and NH 4 + ions and complexation with the carboxyl, hydroxyl, and amine groups could have been the primary mechanisms of Cu(II) binding as forms of Cu 2+ and CuOH + onto the CSP. CSP could be a promising size-enhancing biopolymer for copper removal from aqueous solutions. Graphical abstract
研究领域:
环境科学
·
生物学
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DOI
Frontiers in Chemistry
·
2022
·
IF 5.545
Arsalan Muhammad,Saddique Imram,Baoji Miao,Awais Azka,Khan Ilyas,Shamseldin Mohamed A.,Mehrez Sadok
We aimed to synthesize sensitive electrochemical sensors for hydrogen peroxide sensing by using zinc oxide nanorods grown on a fluorine-doped tin oxide electrode by using the facial hydrothermal method. It was essential to keep the surface morphology of the material (nanorods structure); due to its large surface area, the concerned material has enhanced detection ability toward the analyte. The work presents a non-enzymatic H2O2 sensor using vertically grown zinc oxide nanorods on the electrode (FTO) surfaces with Cu nanoparticles deposited on zinc oxide nanorods to enhance the activity. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-Ray (EDX), X-ray diffraction (XRD), and electrochemical methods were used to characterize copper–zinc oxide nanorods. In addition to the high surface area, the hexagonal Cu-ZnO nanorods exhibited enhanced electrochemical features of H2O2 oxidation. Nanorods made from Cu-ZnO exhibit highly efficient sensitivity of 3415 μAmM−1cm−2 low detection limits (LODs) of 0.16 μM and extremely wide linear ranges (0.001–11 mM). In addition, copper-zinc oxide nanorods demonstrated decent reproducibility, repeatability, stability, and selectivity after being used for H2O2 sensing in water samples with an RSD value of 3.83%. Cu nanoparticles decorated on ZnO nanorods demonstrate excellent potential for the detection of hydrogen peroxide, providing a new way to prepare hydrogen peroxide detecting devices.
研究领域:
材料科学
·
分析化学
·
生物医学工程
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DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 12
·1515
·
IF 4.501
Ding Zhang,Yun-Fei Li,Li-Xue Liu,Lei Duan,Zhi-Li Ren,Shou-Dong Xu,Liang Chen,Hui-Juan Guo,Yi Huang,Li-Juan Shi,Qun Yi
Among clean energy transformation devices, fuel cells have gained special attention over the past years; however, advancing appropriate non-valuable metal impetuses to halfway supplant the customary Pt/C impetus is still in progress. In this paper, we propose a specific electrocatalyst in the formula of highly-active Cu species, associated with coated carbon (Cu@C-800), for oxygen reduction reaction (ORR) through post-treatment of a self-assembled precursor. The optimized catalyst Cu@C-800 showed excellent ORR performance (i.e., the onset potential was 1.00 V vs. RHE, and half-wave potential of 0.81 V vs. RHE), high stability, resistance to methanol, and high four-electron selectivity. The enhancement is attributed to the synergy between the carbon matrix and a high explicit surface region and rich Cu nano-species.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
Science China-Physics Mechanics & Astronomy
·
2018
·Vol. 61
·期 9
·1-4
·
IF 2.754
Zhang Yue,Liu Wenhao,Si Jin,Zhu Xiyu,He Chengping,Zhao Haonan,Wen Hai-Hu
Superconductivity is observed in a new nontoxic cuprate system Ga-Ba-Ca-Cu-O, with T c = 82 K for GaBa 2 Ca 5 Cu 6 O 14 + δ ( 5 (Ga-1256) and T c = 116 K probably for GaBa 2 Ca 3 Cu 4 O 10+δ (Ga-1234) or GaBa 2 Ca 2 Cu 3 O 8+δ (Ga-1223), respectively. All compounds are fabricated by solid state reaction method under high pressure and high temperature. Samples are characterized by resistivity, magnetization and X-ray diffraction (XRD) measurements. The temperature dependence of magnetization measured in both zero-field-cooled and field-cooled processes on one sample (S1) shows two superconducting transitions at about 82 K and 113 K. The estimated shielding fraction for the phase with T c of 82 K is about 67%, while the fraction for another phase with T c of 113 K is quite small. The XRD Rietveld refinement for S1 indicates two main phases existing in the sample, Ga-1256 with fraction of about 58% and non-superconducting Ca 0.85 CuO 2 with fraction of about 42% respectively. Thus, we can conclude the superconducting phase with transition temperature of 82 K is due to Ga-1256. The resistivity measurement also confirms the superconductivity for S1, and the resistivity reaches zero at about 82 K. The temperature dependence of magnetization for another sample (S2) shows much higher superconducting shielding fraction for the phase with T c of 116 K, which may be a promising prospective for the synthesis of Ga-1234 or Ga-1223 phase.
研究领域:
凝聚态物理
·
超导物理
·
材料科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Jihong Liang,Yifan Zheng,Zongjian Liu
Cu electrodes are prepared by thermal annealing of Cu nanowires under Ar atmosphere at 600–800 °C for 30 min. Investigation of as-prepared electrodes by both X-ray diffractometry and scanning electron microscopy indicates that after annealing a rise in the size of Cu nanowires occurs due to the melting of some small-sized Cu nanowires. When the annealing temperature is not too high (e.g. 600 °C), the melting of small-sized nanowires may create many tightly-connected junctions among big-sized nanowires, leading to the formation of a stable, porous nanowire network. The measurements of both electrochemical active surface areas and electrocatalytic activity of these Cu electrodes demonstrate that their active surface areas decrease with increasing the annealing temperature and the electrode prepared at 600 °C shows the highest activity for reduction of nitrate in acidic medium. Examination of the electrode prepared at 600 °C as nitrate sensor via differential pulse voltammetry reveals that this sensor exhibits excellent performance: a linear response ranging from 8 to 5860 μM (R 2 = 0.999), a sensitivity of 1.375 μA/μM, and a detection limit of 1.35 μM at a signal-to-noise ratio of 3. Compared with the Cu-based sensors reported in the literature, this nanowire-based sensor not only possesses the broadest linear range but also has a very low detection limit. Its stability, anti-interference ability, and application to nitrate detection in real samples are also investigated.
研究领域:
分析化学
·
环境监测
·
电化学传感
·
材料科学
·
水处理
·
生物医学工程
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DOI
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Yunfeng Bao,Chunlei Huang,Limin Chen,Yu dong Zhang,Long Liang,Jinjun Wen,Mingli Fu,Junliang Wu,Daiqi Ye
Anatase TiO 2 nanosheets (-ns-) with dominant exposed {001} facets were used as support to load copper, and the synthesized Cu/TiO 2 -ns catalysts were evaluated for CO 2 hydrogenation to methanol. Under the reaction conditions, P = 3.0 MPa, T = 260 °C, V (N 2 ): V (H 2 ): V (CO 2 ) = 8:69:23 and gas hourly space velocity (GHSV) = 3600 mL g −1 h −1 , the methanol yield reached an appealing high value, 5.6%. Copper-loading amount, calcination temperature and reduction atmosphere have been investigated in this work, which significantly influence the particle sizes of copper and/or the defect concentration in TiO 2 , then leading to different catalytic performance. Characterizations of XRD, EPR, CO 2 -TPD and FTIR demonstrate that higher specific surface area of Cu is good for the hydrogenation of CO 2 and adequate amount of Ti 3+ plays important roles in CO 2 activation. Both of them facilitate high turnover frequency (TOF) of methanol formation.
研究领域:
催化化学
·
能源化学
·
材料科学
·
环境科学
·
工业催化
·
表面科学
·
纳米材料
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huanqin Yu,Ting Liu,Chen Li,Beilei Yuan,Jinbiao Jia,Bingqiang Cao
Overcoming the toxicity of organic–inorganic perovskite materials is one of the main challenges in applying them to commercial optoelectronic devices, despite the amazing power conversion efficiency (PCE) of organic–inorganic hybrid perovskite solar cells (PSCs). In this work, we demonstrate a low-toxicity Pb-Cu alloyed perovskite film prepared by simple two-step methods and its integration in inverted PSCs. The formation of iodine defects was suppressed through the hydrogen bonding of guanidinium (Gua) cation (CH 6 N 3 + ), which greatly improves the quality of the film. It is demonstrated that introduction of GuaI additives leads to stronger photoluminescence (PL) intensity, and lower defects state density. The open circuit voltage (Voc) and PCE of Pb-Cu alloyed PSCs reached 0.95 V and 9.69%, respectively. This work helps to guide the preparation of efficient low-toxicity Pb-Cu alloyed optoelectronic devices.
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DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Dawang Chu,Zhicheng Luo,Yingying Xin,Chengzhen Jiang,Shaofeng Gao,Zhihao Wang,Chen Zhao
The chemo-catalytic production of ethanol from nonedible lignocellulosic biomass is essential for mitigating energy shortage. In this work, we developed a multifunctional Pd-Cu-WO x /SiO 2 catalyst for the one-pot aqueous-phase conversion of cornstalk-derived cellulose to ethanol with a yield of 42.5C% at 300 °C and 4 MPa H 2 . Kinetic studies demonstrated that the transformation of cellulose to ethanol followed a number of consecutive steps namely, cellulose hydrolysis to glucose with H + in hot water (k 1 ), glucose conversion to glycolaldehyde over W species (k 2 ), glycolaldehyde hydrogenation to ethylene glycerol (EG) over Pd (k 3 ), and EG hydrogenolysis to ethanol over Cu (k 4 , rate-determining step). The individual rates were well balanced on Pd, Cu, and WO x species to achieve an ethanol formation rate of 0.163 g·g Cat . −1 h −1 . The addition of Au to Cu-WO x species led to a relatively low k 3 and thus the formation of a substantial amount of humins, while the Ru introduction catalyzed the over-hydrogenolysis of ethanol to methane and ethane with a high rate, thereby lowering the selectivity to ethanol. The characterization results showed that both the electronic properties of Cu + species and the Cu + /Cu 0 ratio on the Pd-Cu-WO x /SiO 2 catalyst contributed to a specific C O bond cleavage, especially for EG hydrogenolysis to ethanol during the cellulose conversion.
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Peilin Cao,Cong Wang,Linpeng Liu,Kaiwen Ding,Jiahua He,Dejin Yan,Nai Lin,Ji'an Duan
The reliability of Cu bonding technology in three-dimensional integration packaging is limited by high sintering temperatures and the growth of oxide at the joining interface. Hence, we propose a bionic adhesion interface of creeper sucker on the Cu substrate and covered with monolayer graphene, which increases the shear strength by 3 times compared to the conventional flat Cu substrate. The covered graphene layer effectively inhibits the generation of oxide at the joint interface and maintains a high shear strength after aging at 300 °C for 48 h Nanoscale Cu particles could reduce the chemical potential energy of the substrate surface , and stable bonding was achieved at 200 °C under a pressure of 2 MPa. Molecular dynamics simulation models reveal crystal structure evolution and residual stresses during the sintering process . This work demonstrates that bionic microstructures applied to copper bonding play an important role in interface enhancement, resulting in reliable bonding of Cu substrate at low temperatures. The method proposed here can provide insight into diversified applications including high-power light-emitting diodes soldering, SiC electronic devices, and flexible electrode interconnects.
研究领域:
材料科学
·
微电子封装
·
纳米技术
·
表面工程
·
固态物理
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Qiang Bi,Yilin Zhao,Bo Yang,Yue Du,Ying Xue,Kun Zhang,Juanqin Xue
The abuse of antibiotics has caused serious harm to the ecological environment and human health. Fenton-like advanced oxidation technology is a green and effective treatment means, but how to improve the Fenton reaction efficiency and wide pH adaptability is still a big challenge. Herein, we designed and developed a single-atom catalyst Cu 1 -CN with graphite-phase carbon nitride as the carrier by loading a low amount of metal Cu. The N atom anchors the copper atom in the form of a coordination bond, and the single atom Cu site has excellent performance in activating H 2 O 2 . Not only a short period of time (10 min) oxidation degradation of tetracycline (degradation rate 80 %), and in a broad range of pH (3.2 ∼ 9.5) still maintaining high removal performance (efficiency more than 70 %). Combined with X-ray absorption fine structure characterization and density functional theory (DFT) calculations, it is considered that isolated Cu atom and N atom cooperate to construct highly reactive Cu-N 4 active centre, which completes the task of H 2 O 2 activation. This study provides a new theoretical basis and technical support for the degradation of antibiotic pollutants by single-atom Fenton-like reaction.
研究领域:
环境科学
·
催化化学
·
高级氧化技术
·
材料化学
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DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 18
·9092-9099
·
IF 5.968
Shiguo Chen,Yujuan Guo,Shaojun Chen,Huimin Yu,Zaochuan Ge,Xuan Zhang,Peixin Zhang,Jiaoning Tang
Due to the outbreaks of infectious diseases caused by different pathogenic bacteria and development of antibiotic resistance, researchers are actively searching for new antibacterial agents. Synergistic antibacterial effects provide a new way to prepare antibacterial systems to fight resistant bacteria. In this study, novel copper (Cu)/titanium dioxide (TiO2)/chitosan (CS) (CTC) three-component nanoparticles were facilely prepared via photocatalytic reduction on the basis of the synergistic antibacterial principle. The structure, antibacterial activity and antibacterial mechanism of CTC were investigated systematically. The results showed that this hybrid material exhibits excellent antibacterial ability against Escherichia coli and Staphylococcus aureus due to the synergistic antibacterial effect of the Cu, TiO2 and CS components in the nanoparticles. The minimal inhibition concentrations (MIC) of CTC against E. coli and S. aureus are only 5.22 μg mL−1 and 2.61 μg mL−1, respectively, much lower than the two-component systems. Thus, the encouraging results presented in this study demonstrate great potential applications of CTC as an alternative candidate for an antibacterial agent with high antibacterial activity.
研究领域:
纳米技术
·
抗菌材料
·
材料科学
·
光催化
·
生物医学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）