Nano Research
·
2019
·Vol. 12
·期 12
·2919-2924
·
IF 8.515
Meng Qianqian,Zhang Huimin,Liu Yue,Huang Shaobo,Zhou Tianzhu,Yang Xiaofei,Wang Biyan,Zhang Wenfeng,Ming Hai,Xiang Yu,Li Meng,Cao Gaoping,Huang Yaqin,Fan Li-zhen,Zhang Hao,Guan Yuepeng
The growth of Li dendrites and the instability of the solid electrolyte interphase (SEI) layer during plating/stripping has hindered the practical application of high-energy-density batteries based on a lithium metal anode. Building a stable interfacial layer is effective in preventing lithium corrosion by the electrolyte and controlling the deposition of lithium metal. Here, we present a robust polydopamine-Cu ion (PDA-Cu 2+ ) coating layer formed by the aggregation of nanoparticles and Cu ions, which can be obtained by a subtle immersion strategy. We demonstrate that the PDA-Cu 2+ protective layer, with a unique structure comprising nanoparticles, can regulate and guide Li metal deposition, and together with Cu ions, forms a lubricating surface to facilitate uniform Li ion diffusion and induce stable SEI layer formation. Li anodes with this PDA-Cu 2+ layer modification ultimately achieve higher Coulombic efficiencies, which are consistently stable for over 650 cycles at 0.5 mA·cm −2 without Li dendrites. The introduced PDA-Cu 2+ coating can adhere to any material of any shape; additionally, the operation can be realized on a large scale because of its simplicity. These merits provide a promising approach for developing stable and safe lithium metal batteries.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiangfu Meng,Guoxing Pan,Hongji Liu,Yong Qian,Xingyu Wang,Changlai Wang,Lin Hu,Hui Wang,Qianwang Chen
The electroreduction of carbon dioxide (CO2) to a liquid product is a viable method for establishing an artificial carbon cycle. Unfortunately, most electrocatalysts’ low efficiency and instability prevent them from being used in practical applications. In the current study, we developed ultrasmall Cu nanocrystals embedded in nitrogen-doped carbon nanosheets (Cu/NC-NSs) for selective CO2 electroreduction by adjusting the potential. Cu/NC-NSs had 43.7 and 63.5% Faradaic efficiencies for the synthesis of ethanol and formate with applied potentials of −0.37 and −0.77 V vs reversible hydrogen electrode (RHE) using a flow cell architecture, respectively. Moreover, these Cu/NC-NSs show a steady catalytic performance up to 16 h. Density functional theory (DFT) calculations were performed to investigate the reaction mechanism. Furthermore, the synergistic effect formed by nitrogen-doped carbon and highly dispersed copper atoms led to their excellent performance in CO2 electroreduction.
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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yu Cao,Luona Wang,Chengyin Wang,Xiaoya Hu,Yunling Liu,Guoxiu Wang
A photoelectrochemical (PEC) sensor based on hierarchically porous Cu-BTC/g-C 3 N 4 nanosheet (Cu-BTC/CN-NS, BTC = benzene-1,3,5-tricarboxylic acid) material was constructed for the first time. As a composite material, the hierarchically porous Cu-BTC can help to efficiently capture suitable pesticide molecules and accelerate signal transmission, while CN-NS possesses good optical performance. Under the irradiation of visible light, the Cu metal center can coordinate with the added glyphosate to form Cu-glyphosate complexes, leading to the increased steric hindrance of electron transfer and consequently resulted in an obvious decrease in photocurrent . Through this strategy, the constructed sensor can realize the detection of glyphosate from non-electroactive to electroactive. The results indicate that this photoelectrochemical sensor has a low detection limit of 1.3 × 10 −13 mol L −1 and a wide detection range (1.0 × 10 −12 –1.0 × 10 −8 mol L −1 and 1.0 × 10 −8 ∼ 1.0 × 10 −3 mol L −1 ). Furthermore, this Cu-BTC/CN-NS based sensor has the characteristics of short detection time and easy operation. It has great potential applications in photoelectrochemical analysis.
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Science Advances
·
2024
·Vol. 10
·期 15
·
IF 11.7
Kerong Chen,Anwei Zhou,Xinyuan Zhou,Jielei He,Yurui Xu,Xinghai Ning
Disruptions in metal balance can trigger a synergistic interplay of cuproptosis and ferroptosis, offering promising solutions to enduring challenges in oncology. Here, we have engineered a Cellular Trojan Horse, named MetaCell, which uses live neutrophils to stably internalize thermosensitive liposomal bimetallic Fe-Cu MOFs (Lip@Fe-Cu-MOFs). MetaCell can instigate cuproptosis and ferroptosis, thereby enhancing treatment efficacy. Mirroring the characteristics of neutrophils, MetaCell can evade the immune system and not only infiltrate tumors but also respond to inflammation by releasing therapeutic components, thereby surmounting traditional treatment barriers. Notably, Lip@Fe-Cu-MOFs demonstrate notable photothermal effects, inciting a targeted release of Fe-Cu-MOFs within cancer cells and amplifying the synergistic action of cuproptosis and ferroptosis. MetaCell has demonstrated promising treatment outcomes in tumor-bearing mice, effectively eliminating solid tumors and forestalling recurrence, leading to extended survival. This research provides great insights into the complex interplay between copper and iron homeostasis in malignancies, potentially paving the way for innovative approaches in cancer treatment.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Qixia Dong,Haoran Dong,Yangju Li,Junyang Xiao,Shuxue Xiang,Xiuzhen Hou,Dongdong Chu
In this work, zero-valent Fe-Cu bimetallic nanoparticles were synthesized using a facile method, and applied to activate sulfite for the degradation of sulfamethazine (SMT) from the aqueous solution. The key factors influencing SMT degradation were investigated, namely the theoretical loading of Cu, Fe-Cu catalyst dosage, sulfite concentration and initial solution pH. The experimental results showed that the Fe-Cu/sulfite system exhibited a much better performance in SMT degradation than the bare Fe 0 /sulfite system. The mechanism and possible degradation pathway of SMT in Fe-Cu/sulfite system were revealed. The reactive radicals that played a dominant role in the SMT degradation process were •OH and SO 4 •- , while the loading of Cu induced the synergistic effect between Fe and Cu. The redox cycle between Cu(I)/Cu(II) remarkably contributed to the conversion of Fe(III) to Fe(II), greatly enhancing the catalytic performance of Fe-Cu bimetal. In real groundwater applications, the Fe-Cu/sulfite system also exhibited satisfactory SMT degradation. The 30-day aging tests of Fe-Cu particles demonstrated that the aging of catalyst was not obviously affecting the removal of SMT. Furthermore, the reusability of catalyst was evidenced by the recycling experiments. This study provides a promising application of bimetal activated sulfite for enhanced contaminant degradation in groundwater.
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METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
·
2019
·Vol. 50
·期 10
·4827-4838
·
IF 1.985
Liu Jun-Kai,Zhang Guo-Hua,Sun Guo-Dong
We propose a process to produce ultrafine W-10 wt pct Cu composite powders by reducing the mixtures of copper tungstate (CuWO 4 ) and tungsten trioxide (WO 3 ) (from the calcination of a mixture of ammonium paratungstate and copper nitrate trihydrate) with carbon black and hydrogen. First, ultrafine pre-reduced tungsten-copper (W-Cu) powders containing a small amount of WO 2 were produced by reducing mixtures of CuWO 4 and WO 3 with insufficient carbon black; then the obtained products were further reduced by hydrogen to remove the residual oxygen. This method provides a simple and low-cost route to prepare ultrafine W-10 wt pct Cu composite powders. The composite powders were sintered at different temperatures [1323 K (1050 °C), 1373 K (1100 °C), 1423 K (1150 °C), 1473 K (1200 °C), and 1523 K (1250 °C)] for 3 hours. A maximum densification of the obtained compact was achieved at a sintering temperature of 1523 K (1250 °C), with a relative density, Vickers hardness and thermal conductivity of the W-10 wt pct Cu composites of 97.8 pct, 365 HV and 165 W/m K, respectively.
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NANOTECHNOLOGY
·
2019
·Vol. 31
·期 11
·115501
·
IF 3.399
Chenhuinan Wei,ChenXia Kang,Qiming Liu
Cu nanowire (Cu NW) and Ag nanosheet (Ag NS) bimetallic nanocomposites were fabricated on a flexible polyethylene terephthalate (PET) slice for non-enzymatic glucose sensing via a facile two-step approach, vacuum filtration, and galvanic displacement. Low-cost Cu NW-based conductive films were employed as the conductive substrates to substitute the traditional glassy carbon electrodes or indium tin oxide electrodes. The highly stable Ag NSs grow directly on the surface of Cu NWs without additional binders. The AgNO3 concentration and displacement time were adjusted to control the consumption of Cu NWs and the growth of Ag nanostructures. With the large load of Ag and the great connection of Cu NWs, a high sensitivity of 2033 μA mM−1cm−2, a fast amperometric response of 2 s, a wide linear range of 0.0015–4.02 mM, and a satisfactory result in human serum analysis were obtained by this novel Ag NS/Cu NW/PET sensor. Especially the sensitivity of the sensor was over four-fold higher than that of pure Cu NWs/PET, benefiting from the synergistic effect of bimetals. Furthermore, the Ag NS/Cu NW/PET sensor demonstrated a stable amperometric signal against mechanical bending. The material holds promise to use to fabricate flexible electrochemical devices.
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Journal of Central South University
·
2024
·Vol. 30
·期 12
·3881-3896
·
IF 3.7
Ma Xin,Duan Guang-yu,Huang Jia-qi,Yang Jia,Cao Zhan-fang,Wang Shuai
Heavy metal-contaminated water has become a great challenge for aquatic ecosystems. Herein, a versatile composite (IRC 748-GO) adsorbent was prepared by modifying graphene oxide (GO) with Amberlite IRC 748 resin. The batch and dynamic adsorption experiments of Cu 2+ on the IRC 748-GO composite were conducted, and the results showed that the novel adsorbents have a high adsorption capacity compared to the pristine GO. The adsorption process was consistent with the pseudo-second-order kinetic model and the equilibrium data were well fitted to the Langmuir isotherm model, and the maximum uptake of Cu 2+ was 127.22 mg/g. The adsorption mechanism was investigated using FT-IR, SEM, XPS, and adsorption isotherms, which revealed that the carboxyl groups in IRC 748-GO composite could effectively chelate Cu 2+ . Overall, the IRC 748-GO composite exhibited important advantages such as great specific surface area and stability, as well as high adsorption capacity, which provides broad application prospects for efficiently remediating wastewater containing heavy metals.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yan Liu,Yamin Zheng,Panpan Dong,Wenzhuang Zhang,Wenjie Wu,Junjie Mao
Development of high-performance heterogeneous catalytic materials is important for the rapid upgrade of chemicals, which remains a challenge. Here, the benzene oxidation reaction was used to demonstrate the effectiveness of the atomic interface strategy to improve catalytic performance. The developed B,N-cocoordinated Cu single atoms anchored on carbon nanosheets (Cu1/B–N) with the Cu–N2B1 atomic interface was prepared by the pyrolysis of a precoordinated Cu precursor. Benefiting from the unique atomic Cu–N2B1 interfacial structure, the designed Cu1/B–N exhibited considerable activity in the oxidation of benzene, which was much higher than Cu1/N–C, Cu NPs/N–C, and N–C catalysts. A theoretical study showed that the enhanced catalytic performance resulted from the optimized adsorption of intermediates, which originated from the manipulation of the electronic structure of Cu single atoms induced by B atom coordination in the Cu–N2B1 atomic interface. This study provides an innovative approach for the rational design of high-performance heterogeneous catalytic materials at the atomic level.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Shengji Wu,Menglin Lin,Xijie Cheng,Xuyan Zhao,Fan Yang,Ying Xie,Lei Che,Lijiang Hu,Wei Yang
Electrocatalytic nitrate reduction (NO 3 RR) process presents a green and sustainable approach for mitigating environmental nitrate pollution while enabling ambient NH 3 synthesis. However, it was hindered by the challenge of developing non-noble electrodes that exhibited both high activity and low cost. Herein, iron and copper-doped ZIF-8 electrocatalysts (FeCuO x @CN) with varying Fe/Cu molar ratios (Fe/Cu = 2/1, 1/1 and 1/2) were synthesized. The process involved doping iron into the ZIF-8 precursor, followed by pyrolysis at 700, 800 or 900°C to embed copper with ZIF-8. Synergistic effects between Fe and Cu were observed in the FeCuO x @CN catalysts and an appropriate molar ratio of Fe/Cu was found to effectively balance the reduction rates of NO 3 – and NO 2 – , leading to a high NH 3 yield rate. Among the synthesized catalysts, Fe 1 Cu 2 O x @CN-800 exhibited the best NO 3 RR performance, achieving an NH 3 yield rate of 1975.4 μg h −1 mg cat -1 and a faradaic efficiency of 98.3 % at −0.6 V ( vs. RHE). Furthermore, it exhibited excellent cycling stability, maintaining a faradaic efficiency above 96 % over 20 cycles. The NO 3 RR mechanism over Fe 1 Cu 2 O x @CN-800 was determined to be proceeded with a sequence of deoxygenation steps: NO 3 – → *NO 3 → *NO 2 → *NO → *NOH → *NH 2 O → *NH 2 OH → *NH 2 → *NH 3 .
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ACS Catalysis
·
2025
·
IF 13.1
Minglei Lu,Yushen Liu,Fan Yang,Yuxin Ge,Xudong Shi,Yongqi Mao,Xinyuan Song,Zejian Li,Jiajin Li,Yuxiang Lyu,Guimei Liu,Zhuoyu Zheng,Yuan Yuan,Junwei Liao,Xitang Qian,Minhua Shao,Tiejun Wang
Ensuring safer and more satisfactory hydrogen (H2) production from aqueous-phase reforming of methanol (APRM) is crucial for automotive, marine, and aerospace applications. However, nonprecious metal catalysts face challenges in realizing efficient methanol (CH3OH) dehydrogenation and effective carbon monoxide (CO) suppression for APRM without a strong base. In this work, we synthesized Ga2O3-modified Cu–ZnO catalysts with carbon encapsulation, leading to a uniform Cu dispersion. The optimized 12 wt % GCZ-2.0-C450 catalyst exhibits good performance over a wide temperature range (130–210 °C). It achieves a high H2 production rate of 101.2 μmol/gcat/s and low CO selectivity (0.07%) at 210 °C with long-term stability, surpassing the reported Cu- and Pt-based catalysts in APRM. Density functional theory calculations indicate that the Ga2O3 introduction significantly reduces the Gibbs energy of the rate-determining step of *CH3O + *H → *CH2O + *H2, dropping from 1.25 to 0.60 eV. Meanwhile, the adsorption energy of the generated *H2 decreases from −2.92 to −0.13 eV, which facilitates the release of gaseous H2.
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Scientific Reports
·
2025
·Vol. 15
·期 1
·42567
·
IF 3.9
Chen Dejun,Feng Jiawei,Guan Qingqing,Zhao Mengqi,Yuan Hao,Liang Xiaoyang
This study successfully developed Cu-Mn supported catalysts on fly ash geopolymer for the oxidative removal of toluene. The surface characteristics and catalytic performance of catalysts were systematically investigated in this paper. It was found that the Cu/Mn ratio plays a crucial role in determining the catalysts’ performance, with the Geo-3 catalyst showing the highest toluene conversion rate of 90% at 296 ℃. The catalyst also exhibited the lowest activation energy of 123.0 kJ/mol, indicating its superior catalytic efficiency. The findings not only contribute to the development of cost-effective and efficient catalysts for VOCs degradation but also provide valuable insights into the influence of the Cu/Mn ratio on the catalytic properties of geopolymer-supported Cu-Mn catalysts. This research offers a promising approach for the abatement of VOCs in industrial emissions.
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