Environmental Science-Nano
·
2024
·
IF 5.8
Jingwei Hong,Wanli Li,Jin Shang,Hiromi Yamashita,Yun Hu
Utilizing electrocatalysis to convert CO2 into high-value industrial raw materials can not only effectively reduce CO2 emissions but also achieve a closed carbon cycle. This method holds great potential for addressing global warming and alleviating the fossil fuel crisis. Here, we report a novel electrocatalyst for CO2 reduction composed of a composite material derived from Cu-MOF74 and Cu2O, synthesized under the regulation of an appropriate amount of KOH. The research results indicate that the unique Cu0/Cu+ interface in Cu-MOF74/Cu2O-350 enhances the adsorption of reaction intermediates, providing more active sites for CO2 reduction. Additionally, the moderate carbonization during the thermal treatment process increases conductivity and enriches the electrochemical active surface area, accelerating the charge transfer rate. Consequently, this composite exhibits excellent CO2 reduction performance. At -1.3 V vs. RHE, the Faraday efficiency (FE) for C2H4 production reached up to 32.48%, which was significantly higher than that of pure Cu2O-350 (9.25%) and Cu-MOF74-350 (15.52%). Even after 6 hours of reaction, the FE for C2H4 remained above 24.52%, reflecting its good stability. Furthermore, we utilized in-situ infrared spectroscopy to study the key intermediates of the relevant reduction products, inferring the possible reaction pathways for the formation of HCOOH and C2H4. This study provides a simple synthesis method for the preparation of high-selectivity MOF-derived composite catalysts for the electrocatalytic reduction of CO2 to value-added chemicals.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yang Liu,Hailong Feng,Weiyi Li,Xueping Wang,Guoxiang Huang,Longxia Wang,Xingqiu Li,Yuxing Xie,Chenglu Liang
Catalysts in-situ reconstructed from transition metal sulfides for oxygen evolution reaction (OER) have been regarded as potential alternatives for the noble metal catalysts . Intriguingly, it was found that the self-optimized SO 4 2− @Cu doped Co(OH) 2 catalyst was reconstructed from bimetallic sulfide of CuCo 2 S 4 . During the OER process, the copper was partially leached and meantime doped into the in-situ generated Co(OH) 2 with SO 4 2− adsorption, while only oxides were discovered in counterparts of mono-metal sulfides. As a result, the SO 4 2− @Cu doped Co(OH) 2 catalyst exhibited superior OER performances, with low overpotentials of 211/272 mV to achieve the current densities of 10/100 mA cm −2 , exceeding the counterparts reconstructed from mono-metal sulfides. Experimental and theoretical results suggested that the in situ generated Cu doped Co(OH) 2 possessed thin and loosely layered structure with expanded lattice spacing (lattice spacing expanded from 0.28 nm to 0.46 nm) due to the SO 4 2− adsorption, making the intermediates more accessible to the active centers. In addition, the catalyst surface changed from hydrophobicity to super hydrophilicity , which greatly accelerated the mass transfer. This work indicated that the in-situ reconstruction process was greatly influenced by the interactions between metal sites and sulfide species, directly influencing the OER performances of the reconstructed catalysts.
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JOURNAL OF MOLECULAR STRUCTURE
·
2018
·
IF 2.011
Yi-Chun Chu,Tian-Tian Wang,Xiang-Yu Ge,Peng-Hao Yang,Wei Li,Jing Zhao,Hai-Liang Zhu
Two Cu(II) complexes of the non-steroidal anti-inflammatory drug Naproxen were synthesized, characterized and evaluated for anti-inflammatory, analgesic, ulcerogenic and urease inhibition activities. The complex 1 [Cu(nap) 2 (H 2 O) 3 ]·H 2 O was reported previously, and the crystal structure of complex 2 [Cu(nap) 2 (dap)(H 2 O)] (nap = Naproxen, dap = 1,3-diaminopropane) was confirmed by X-ray diffraction crystallography . The anti-inflammatory and ulcerogenic study showed that the compounds 1 and 2 were the promising anti-inflammatory agents and demonstrated significant gastric tolerance when compared with Naproxen, especially for complex 1 with the edema inhibition of 93.6% after 3 h, and ulcer index of 15 ± 2. Analgesic and urease inhibition assay showed that complex 2 was a potent urease inhibitor with the IC 50 value of 1.69 ± 0.08 μ M and pain inhibition value of 65%. As effective urease inhibitors, molecular docking study was performed to investigate the binding mode of the complexes with urease.
研究领域:
药物化学
·
生物无机化学
·
药理学
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高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2014
·
IF 3.377
Wei Li,Xiongfei Chen,Yan Fu,Jinli Zhang,Wei Li
The specific interactions of Cu2+ with self-complementary DNA sequences involving d[G4C4(GC)2G4C4], d[(GC)10], and d[(AT)10], as well as the chiral recognition mechanism of ofloxacin enantiomers via the CuII-modulated DNAs, were investigated using characterizations of circular dichroism, gel electrophoresis, FT-IR spectroscopy, UV melting measurement, electron paramagnetic resonance, and HPLC. The CuII-coordinated GC-rich DNAs exhibit amplified enantioselectivity toward the S-enantiomer of ofloxacin. Especially in the case of d[G4C4(GC)2G4C4], ofloxacin enantiomers intercalate into the two adjacent guanine bases through the minor groove mediated by Cu2+, which leads to a more favorable binding between S-ofloxacin and DNA. The highest ee value of ofloxacin enantiomers in the permeate after being adsorbed by the CuII–DNA complex is obtained as 49.2% in the R-enantiomer at the [Cu2+]/[base] molar ratio of 0.25, while at the [Cu2+]/[base] molar ratio of 0.05 the highest ee value of ofloxacin enantiomers in the retentate reaches 26.3% in the S-enantiomer. This work illustrates a novel promising route to construct DNA-based chiral selectors toward certain drug enantiomers through the programmable enantioselective recognition on the basis of DNA chirality and the specific binding of transition metal ions.
研究领域:
化学
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生物化学
·
药学
·
分析化学
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高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2021
·Vol. 31
·期 2
·1317-1324
·
IF 1.819
Jin Ling,Jiang Kaiyong,Kang Lei,Yan Binggong
Copper and copper alloys own high thermal conductivity, electrical conductivity, good plasticity, and corrosion resistance, which are widely used in electric power, aerospace, and marine engineering. Due to low absorption rate of infrared and near infrared light, high thermal conductivity and high activity with oxygen, laser cladding of copper, and copper alloys are difficult to be conducted in air since the problems associated to cracks and voids are always hardly to be eliminated. In this paper, C-Al 2 O 3 -Cu composite powder mixed with Ni and Fe was developed to solve these problems. Use of carbon was to depress the oxidation and improve the laser absorption, while alumina was used to improve the laser absorption and mechanical strength. To improve the bonding strength between cladding layer and substrate, Ni and Fe were used. Experimental results showed that no obvious aggregation was observed and the powder showed good fluidity. The tensile strength of the cladding layer is 406.7 ± 0.1MPa which is about 1.7 times higher than that of pure copper substrate, and the tensile fracture of the cladding layer revealed microporous aggregation fracture due to the existence of Al 2 O 3 in the cladding layer.
研究领域:
材料科学
·
激光技术
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高影响因子
MATERIALS SCIENCE FORUM
·
2023
·
IF 0
Ping Wang,Shu Guang Dong,Zhong Chao Zhao,Yu Fu
In this work, the Cu-alginate/graphene aerogels were prepared by using alginate, graphene and copper chloride as precursors by a freeze-drying process. Finally, N-doped carbon aerogels supported by Cu nanoparticles (NPs) (Cu/N-CAs) were obtained through annealing in the NH3 atmosphere. The morphology, microstructures, specific surface area, and pore size distribution were studied by SEM, XRD, and BET analysis. The results showed that a significant amount of Cu NPs were uniformly disseminated on the aerogels’ surface, and the catalysts’ specific surface area reached 141 m2/g. Electrochemical tests revealed good catalytic capabilities for the oxygen reduction reaction (ORR) of the as-obtained Cu/N-CAs. Compared to the commercial 20%Pt/C, the Cu/N-CAs exhibited comparable catalytic performance, superior catalytic stability and methanol resistance. The transfer of 3.94 electrons indicated that the Cu/N-CAs were undergoing a four-electron (4e-) ORR process.
研究领域:
材料科学
·
电化学
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ACS Applied Nano Materials
·
2020
·
IF 0
Siyu Kuang,Minglu Li,Rong Xia,Lei Xing,Yaqiong Su,Qun Fan,Jinping Liu,Emiel J.M. Hensen,Xinbin Ma,Sheng Zhang
The electrochemical carbon dioxide reduction reaction (CO2RR) is a promising solution to the current environmental and energy issues. Cu is the only metal catalyst able to convert CO2 into high-value-added hydrocarbons. However, Cu catalysts tend to degrade with the decrease in the hydrocarbon selectivity under operation conditions. Herein, we monitored the morphological evolution of Cu nanocatalysts and correlated with changes in the selectivity of hydrocarbon products during electrochemical CO2 reduction. Initial Cu nanospheres quickly reconstructed into nanocubes within 1 h of CO2 electrolysis and then gradually turned into even smaller irregular nanoparticles. Interestingly, the above unstable Cu nanocube offered the maximum ethylene selectivity. We successfully stabilized these Cu nanocubes using a 2D graphene surface doped with nitrogen to achieve high ethylene selectivity over 24 h. Our X-ray photoelectron spectroscopy (XPS) and density-functional theory (DFT) investigations show that the strong interaction between Cu and pyridinic nitrogen on the 2D graphene surface plays a key role in stabilizing Cu nanocubes.
研究领域:
材料科学
·
电化学
·
催化反应
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DOI
Nanomaterials
·
2025
·Vol. 16
·期 1
·
IF 4.3
Ying Xie,Qitong Sun,Yuanyuan Li,Wanwan Li,Zhiwei Hou,Lihui Wei,Sujun Guan
We report a galvanic replacement-driven strategy for the in situ growth of highly uniform one-dimensional (1D) Cu@CuO-X (X = Ag, Bi) nanobelts directly on aluminum foils. Unlike conventional multi-step coating or hard-template replication strategies, the formation of these heterostructured nanobelts is governed by a spontaneous interfacial galvanic replacement process between Cu and the introduced metal species, ensuring in situ growth and intimate interfacial integration. Comprehensive SEM, TEM, XRD, and XPS characterizations confirm the successful formation of Cu@CuO-Ag and Cu@CuO-Bi architectures, where Bi predominantly exists in the oxidized Bi3+state, forming Bi2O3-like surface species. Benefiting from their 1D anisotropic framework and controllable heterointerfaces, this work underscores the distinctiveness and versatility of the self-templated galvanic replacement strategy for the design of multifunctional nanomaterials.
研究领域:
纳米材料
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电化学
·
材料科学
·
金属有机合成
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高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 21
·e73559
·
IF 2.3
Xin Long,Shijie Zhou,Dong Liang,Mingdong Zhou,Liwei Sun,Yuehui Li
Room-temperature plasma-assisted catalysis represents an important pathway for CO 2 valorization. Rational design of catalysts tailored to plasma environment holds significant potential for improving catalytic efficiency. Unprecedentedly, we report a coordination-engineering strategy to fabricate the Fe/Cu mix-metal organic framework (Fe/Cu-MOF) catalysts for plasma-driven CO 2 dissociation into CO. Precise modulation during synthesis revealed an optimal Fe:Cu ratio of 0.44:0.56 to generating synergistic active sites favorable for CO production. The in situ-formed FeCu-based catalyst exhibited exceptionally high CO space-time yield of 32.3 mmol·gcat-1·h-1 under room-temperature plasma conditions. The coordination-tailored electronic structure enables the dynamic variations in the oxidation states of Fe/Cu upon plasma activation, thus facilitating sustained CO 2 activation. This work establishes atomic-level control of bimetallic sites as a powerful paradigm for plasma-catalytic systems. Graphical For the first time, Fe-Cu bimetallic metal-organic frameworks (MOFs) synthesized via a one‑pot solvothermal method were used for efficient decomposition of CO 2 into CO with excellent stability under nonthermal plasma (NTP). This integrated approach offers fundamental insights and technical support for the development of robust catalysts under plasma conditions.
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Journal of the American Chemical Society
·
2026
·
IF 16.6
Yan Wu,Huaqing Zhang,Dechen Dong,Peng Liang,Yuanzhuo Li,Jiajie Zheng,Xichen Zhou,Jingwen Zhou,Yilin Sun,Zhikang Deng,Shuting Fu,Mingyue Wang,Xiantao Hu,Zuochao Wang,Zijian Jiang,Haoran Liu,Hongjie Dai
Abstract Aqueous batteries with high safety are ideal large-scale energy storage systems, but still face challenges in cycle life, self-discharge, cost, and environment-related issues. Here, we report a rechargeable aqueous zinc–copper battery with high performance, environmental friendliness, and sustainability. We employed widely available metal foils as electrodes and developed a novel zinc–bromide and cuprous–bromide complex anion-containing anolyte and catholyte, respectively, separated by a cation exchange membrane (CEM), utilizing strong coordination between soft bromide ions and zinc/cuprous ions. The battery exhibited a high areal capacity of 4 mAh/cm2 with stable cycling over 2700 h (>900 cycles), energy efficiency up to ∼90%, excellent 99.6% capacity retention against self-discharge over 3 days, and facile scalability to Ah-level Zn/Cu batteries. Importantly, all elements were recycled at the end of the battery cycle life by simple, cost-effective processes with recovery efficiencies of ∼97% for Zn and ∼100% for Cu. This drastically lowered the battery cost and made the anionic Zn–Cu (AZC) battery promising for energy storage at a low cost with high performance and long-term sustainability.
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高影响因子
TALANTA
·
2026
·
IF 6.7
Qianglin Hao,Wenhui Yu,Lili Wang,Duo Sun,Shengping Ruan,YiZhou Yang
In the realm of low-power gas sensing, bimetallic sulfides have garnered a lot of interest as prospective sensitive materials. However, their poor tolerance to dampness and delayed reaction kinetics makes them impractical. In order to modify the electronic structure of CdIn 2 S 4 and enhance its gas sensing capabilities, sulfur vacancies were added using atomic Cu doping. The test findings showed that Cu–CdIn 2 S 4 had a response value of 21 to 100 ppm triethylamine gas at a working temperature of 100 °C, which was five times greater than that of CdIn 2 S 4 . The minimal detection limit was 100 ppb. It also responds quickly and recovers quickly (2 s/33 s). Additionally, the sensor has good humidity resistance and selectivity. Cu doping into CdIn 2 S 4 increases the specific surface area and sulfur vacancy concentration, which speeds up the sensitive materials interaction kinetics with the target gas and improves gas sensing capability. The findings show that the defect design work has a lot of potential for use in low-power triethylamine detection, as it is an inexpensive and highly responsive gas-sensitive material.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Siwei Wang,Jin Du,Zhanquan Zhang,Yan Wang,Zhijie Yuan,Yuhan Wang,Tianpei Yi,Fusheng Pan,Zhongyi Jiang
Separating aromatic and aliphatic hydrocarbons can produce high-quality cracking feedstocks and recover value-added aromatic products. Covalent organic framework (COF) may find promising application owing to its exceptional structures and functionalities. In this study, Cu(I)-COF was designed and integrated into Pebax matrix to fabricate facilitated transport membranes. The immobilization of Cu(I) ions onto the COF framework effectively mitigates leaching. Additionally, the COF building blocks provides a stable electron cloud environment for Cu(I), ensuring long-term stability for over 6 months. The vertical channels in the COF afford rapid mass transfer, and the uniformly distributed Cu(I) enhances toluene affinity, thereby intensifying the transfer of toluene. For a 50 wt% toluene/n-heptane mixture, the Cu 3 L 3 -Pa-Pebax-2 membrane demonstrated a permeation flux of 1100 g·m −2 ·h −1 and a separation factor of 5.44. This study provides a new example for the application of multifunctional organic framework materials to fabricate facilitated transport membranes.
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