ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Kai Zhu,Zihan Lin,Xinyi Bai,Fangfang Chang,Qing Zhang,Xiaolei Wang,Zhengyu Bai
Electrocatalytic reduction reaction of CO2 (CO2RR) into value-added multicarbon (C2+) products represents a sustainable strategy for mitigating greenhouse gas emissions and enhancing the production of high-value chemicals. Cu-based catalysts are optimal for the CO2RR, facilitating the generation of C2+ products such as ethanol, which have significant industrial applications. However, converting CO2 to C2+ products remains a great challenge, necessitating the simultaneous achievement of high current density, Faradaic efficiency (FE), and operational stability for industrial-scale implementation. Herein, we prepared Cu/Cu2O catalysts with diverse morphologies and the ratio of the Cu+/Cu interface, which was rectified by regulating the interactions between the active interface and the intermediate (*CO). The electrochemical analysis demonstrated that reconstructed Cu/Cu2O nanodendrites with dominant grain boundaries exhibited remarkable performance in generating C2+ products, achieving a Faradaic efficiency (FE) of 71.8%, including 49.7% FE of ethanol and a substantial partial current density of 390.0 mA cm–2 within the flow cell. In situ spectroscopy characterization and theoretical calculations revealed that the increased ethanol selectivity originated from the rectification of the Cu/Cu2O interface by the *CO intermediate, which accelerated H2O dissociation, reduced the free energy for *CO hydrogenation to *COH, and facilitated asymmetric *CO-*COH coupling to preferentially reduce CO2 to ethanol. This study provides profound insights into the C–C coupling pathways and sheds light on the rational design of ethanol-oriented electrocatalysts, contributing to sustainable chemical synthesis and energy utilization.
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Materials Today Communications
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2025
·
IF 4.5
Dapeng Li,Jianghe Chen,Yang Fu,Linhai Yang
This study synthesized amorphous copper-doped carbon nitride intermediates (Cu/CN-400) via a template-free self-assembly approach using melamine as the precursor, copper sulfate pentahydrate as the copper source, and deionized water as solvent. By controlling thermal polycondensation temperature (400℃ optimal), we regulated intermediate condensation degrees and achieved transformation of copper from ionic to amorphous states. Comprehensive characterization (XRD, FTIR, SEM, TEM, XPS，BET,ICP) revealed the intermediates' morphological and physicochemical properties, enabling proposal of a formation mechanism for amorphous Cu-CN intermediates through template-free self-assembly and thermal condensation. Heterogeneous copper-doped carbon nitride catalysts derived from Cu/CN-400 intermediates demonstrated significantly enhanced Fenton-like catalytic performance, indicating broad application prospects.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Fei Yu,Tianjie Chen,Jie Ma
Cu 2 O, as a cost-effective chloride ion (Cl − ) storage electrode material, has shown great potential in Cl − removal applications. However, in the electrochemical process, Cu 2 O as the anode is easily oxidized and dissolved by free copper ions (Cu 2+ ), leading to the loss of copper components and causing electrode performance degradation. In this work, we introduced a three-dimensional (3D) self-supporting polyvinyl alcohol/carbon nanotube (PVA/CNTs) conductive hydrogel as the carrier of Cu 2 O for capacitive deionization (CDI). Among them, PVA acts as an antioxidant to inhibit the conversion of Cu 2 O to free Cu 2+ , CNTs act as the growth carrier of copper particles to make them more evenly distributed in the electrode materials, and the 3D hydrogel structure can accommodate a large amount of water, making Cu 2 O fully contact with chloride ions in water and store them. At 1.4 V, the Cu/Cu 2 O@PVA/CNTs conductive hydrogels (Cu@CHs) demonstrate 49.58 ± 3.27 mg g −1 Cl − storage capacity and significantly superior areal Cl − storage capacity on the 13.66 ± 0.68 mg-Cl − cm −2 , and there was no significant performance degradation in 100 cycles. This study, using PVA as the core component, proposes a simple strategy for constructing high areal performance 3D materials and provides optimization ideas for solving the oxidation dissolution problem of faradaic materials in the CDI process.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
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IF 5.6
Die Hu,Xuexun Zhang,Shiwen Gong,Wentao Ma,Bo Cheng,Jing Yang,Lesan Yan,Binbin Li,Tong Qiu,Xinyu Wang
With the wide application of soft tissue fillers, implant material-induced inflammatory reactions have become a key factor affecting the therapeutic efficacy. This study developed an injectable filler with enhanced anti-inflammatory and antioxidant effects by adsorbing glycyl-L-histidyl-L-lysine copper complex (GHK-Cu) onto hydroxyapatite microspheres (HAPs), marking the first combination of HAPs and GHK-Cu to address inflammation caused by soft tissue fillers. GHK-Cu was successfully loaded onto HAPs by electrostatic adsorption. HAPs were then mixed with carboxymethyl cellulose (CMC), glycerol (GLY), and water to form GHK-Cu@CMHA gel. The study focus on the effective combination of HAPs as a carrier for sustained GHK-Cu delivery and the anti-inflammatory properties of GHK-Cu. GHK-Cu@CMHA exhibits sustained release properties for 7 days, which ensures prolonged therapeutic effects, minimizes peptide waste and reduces injection frequency, with good flowability and injectability. In the model of LPS-induced inflammation model in vivo and in vitro, GHK-Cu@CMHA gel reduced levels of inflammatory factors and Reactive oxygen species (ROS) levels decreased, while superoxide dismutase (SOD) activity was enhanced. In this process, H&E staining and Masson staining revealed significant collagen deposition. These findings further confirm that GHK-Cu@CMHA is a novel injectable soft tissue filler with good anti-inflammatory and antioxidant properties, which holds well potential for inflammation inhibition.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shan Li,Huixia Li,Taotao Huang,Xuebo Chen
The development of efficient Cu–Ce catalysts for selective CO oxidation in hydrogen streams (CO-PROX) remains a critical challenge for hydrogen purification technologies. Herein, we report an acid-modified Cu–Ce/γ-Al2O3 catalyst synthesized through HCl-assisted wet impregnation and thermal aging, demonstrating exceptional low-temperature CO-PROX performance. The optimized CuCe0.8(Cl)0.2/γ-Al2O3 catalyst achieves superior CO conversion below 160 °C and maintains stable activity for 50 h at 160 °C. Mechanistic studies reveal that HCl modification induces dual enhancement effects: (1) increased Cu+ species density enhances CO adsorption capacity; (2) elevated Ce3+ concentration promotes oxygen vacancy formation for efficient O2 activation. Complementary characterization demonstrates that the acid treatment optimizes the active species dispersion and creates hierarchical pore structures in the γ-Al2O3 support, which facilitates reactant accessibility and stabilizes catalytic intermediates. The reaction mechanism involves synergistic cooperation between Cu+-mediated CO adsorption, oxygen vacancy-assisted O2 activation, and hydroxyl-assisted bicarbonate intermediate formation on the alumina support. This work establishes an effective acid-modification strategy for designing durable CO-PROX catalysts, advancing the development of a practical hydrogen purification system.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jing Li,Xinwei Du,Peipei Dong,Jianmin Wang,Jian Lin,Haisheng Wei
Chemoselective hydrogenation of quinoline and its derivatives is widely applicable in fine chemical production, yet it still faces grand challenges to obtain high activity and satisfactory selectivity simultaneously under mild conditions. In this study, we tuned the compositions of metallic Cu and Cu 3 N species by NH 3 treatment on CuO precursor at different temperatures. The specific catalyst after 375 °C treatment demonstrates excellent performance in the chemoselective hydrogenation of quinoline, achieving 98.8% conversion and >99% selectivity of 1,2,3,4-tetrahydroquinoline under mild reaction conditions (90 °C, 1 MPa), which significantly surpasses the performance of previously reported Cu-based catalysts. Moreover, the catalyst exhibits remarkable stability and substrate versatility. Various characterizations and DFT calculations reveal that there is obviously synergistic effect between metallic Cu and Cu 3 N species. Specifically, metallic Cu facilitates hydrogen dissociation, while Cu 3 N enhances the adsorption of quinoline molecules. These findings highlight the potential of Cu-based catalyst with dual active sites as a robust and efficient alternative for chemoselective hydrogenation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yuan Li,Shaoqian Jia,Ling-Xin Kong,Xiaotian Guo,Xinyi Lin,Dae Joon Kang,Huan Pang,Feng Yu
Accurate detection of nitrite plays a vital role in public health because excessive intake poses serious health risks. Metal-organic frameworks (MOFs) and their derivatives have emerged as a promising platforms for nitrite detection due to their adjustable structures and functionalization capabilities. In this study, we synthesized Ag/Cu-BTC by doping silver ions during Cu-BTC synthesis, followed by high-temperature carbonization to produce carbon-supported Ag-Cu bimetallic nanoparticles (Ag/Cu@C) for effective nitrite sensing. The carbon framework from MOF precursors not only enhances electrical conductivity and stability but also prevents nanoparticle aggregation. Silver addition enhances electron transfer efficiency and alters the electronic structure through synergistic interactions with copper, resulting in increased catalytic activity. The optimized Ag/Cu@C composite shows excellent sensing performance with a detection limit of 50 nM, high sensitivity (855.32 μA mM −1 cm −2 ), and a wide linear response range (0.2–10,000 μM). The sensor maintains 98.5–103.2 % recovery against 10-fold concentrations of common interferents (Cl - , NO 3 - , SO 4 2- , glucose), and retains 92.3 % initial current after 28 days, demonstrating exceptional selectivity and operational stability. These features highlight its significant potential for practical applications in environmental monitoring and food safety testing.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Yuxi Yang,Xiaojing Liang,Liang Ma,Min Chen,Limin Wu
Rainwater is a clean and abundant energy source, and the liquid–solid triboelectric nanogenerator (LS-TENG) has emerged as a promising technology for harvesting and converting raindrop energy into electricity. Despite its potential, practical applications of LS-TENG have been limited by its low output performance and complex fabrication processes. Herein, we propose a simple and efficient strategy for constructing high-performance LS-TENG by introducing a novel composite triboelectric layer composed of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) doped with SiO2@Cu and 1H,1H,2H,2H-perfluorooctyltriethoxysilane. This design simultaneously enhances the dielectric constant and hydrophobicity of the triboelectric coating through a polarization effect and surface tuning. As a result, the LS-TENG achieves an excellent output voltage of 19 V and a current of 6.7 μA from a single waterdrop, corresponding to 2.5 and 2.8 times those of undoped PVDF-HFP, and can successfully power small electronic devices. Furthermore, the entire LS-TENG, including both the triboelectric and electrode layers, is fabricated via facile, in situ coating processes, offering good scalability, substrate adaptability, and optical transparency. Therefore, this work integrates material-level output enhancement with process-level simplicity, holding great potential for practical applications in droplet energy harvesting.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Wanlong Li,Yuqing Ren,Quan Feng,Xianhong Zheng,Xiangyun Zhou,Jianghui Zhao,Zhi Liu
Flexibility is critical to the dimensional stability of photothermal materials during sustainable solar water evaporation. Herein, a flexible Cu 2 O-Cu co-doped carbon (Cu 2 O-Cu@C) nanofibrous membrane was fabricated by carbonization of polyacrylonitrile (PAN)/Cu(CH 3 COO) 2 nanofiber membrane at 400 °C. This process transformed Cu(CH 3 COO) 2 into a mixture of Cu 2 O and Cu. The Cu 2 O-Cu@C membrane achieved a significantly enhanced stress at break of 3.95 MPa—a 14.6-fold enhancement over pure carbon membranes (0.27 MPa). Moreover, the membrane exhibited excellent flexibility, as it recovered its original shape within 40 ms after folding and maintained its dimensional integrity throughout 1000 bending cycles. Raman spectroscopy and molecular dynamics simulations demonstrated that Cu 2 O-Cu co-doping dramatically improves mechanical properties by (1) increasing density, which enhances structural densification, (2) introducing new interatomic energy contributions that strengthen interfacial interactions, and (3) improving stress transfer and crack inhibition to promote external force dissipation. Under one sun illumination, the Cu 2 O-Cu@C nanofibrous membrane achieved evaporation rates of 1.57 kg·m −2 ·h −1 for 3.5 % saline water and 1.61 kg·m −2 ·h −1 for actual dye wastewater. In addition, following hydrophilic hydrogel modification, the Cu 2 O-Cu@C membrane maintained a stable evaporation rate exceeding 1.76 kg·m −2 ·h −1 during 10-h indoor tests. It also showed no salt crystallization in outdoor testing, confirming its salt resistance and long-term stability for practical applications. These findings will encourage research aimed at enhancing the mechanical properties of PAN-based carbon nanofibers, which are intended for applications in flexible photothermal evaporators, wearable electronics, and related devices.
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Processes
·
2024
·Vol. 12
·期 9
·1912
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IF 2.8
Bowen Lu,Huiying Sang,Liang Liu,Zhijian Yu,Yaqin Guo,Yongqing Xu
The catalytic applications of micron Cu powder are limited due to its large particle size and small specific surface area. Modifying micro-Cu powder to achieve a high catalytic performance is a challenge in the application of micron copper. In this work, micro-Cu was used to synthesize a CeO2–Cu catalyst, and the phase composition and surface pore structure were analyzed using XRD, BET, etc. The CO2hydrogenation performance of the CeO2–Cu catalyst was analyzed in comparison with CeO2and Cu, and we found that the CeO2–Cu catalyst exhibited a synergistic effect between Cu and cerium, resulting in a much higher hydrogenation performance at 500 °C than CeO2or Cu alone. H2-TPR and TEM characterization revealed that the CeO2–Cu catalyst formed interfacial interactions with a relatively large Ce–Cu interface, where cerium oxide could promote the reduction of CuO and lower the reduction temperature. Additionally, cerium oxide formed a confinement structure for Cu, and the CeO2–Cu catalyst exhibited a higher oxygen vacancy concentration, thereby promoting the CO2hydrogenation performance. Cu–CeO2interaction provides valuable insights into the catalytic application of micron Cu powder.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
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IF 20.2
Bibo Ma,Miaomiao Peng,Suqin Zhang,Qingqiang Zhou,Lin Wang,Yumei Zhang,Qingzhi Luo,Jing An,Huiying Mu,Huaiyu Zhang,Zhi Li,Xiaofei Yin,Yandong Duan,Desong Wang
Nonprecious transition metal copper-based catalysts have attracted immense research interest for several applications due to their cost-effectiveness. However, deactivation by agglomeration in high-temperature environments remains a pervasive challenge and limits their uses. Here, we show the controllable dispersion of ultrafine copper nanocomposites among the linear polyimide by a strong CuO x /WO x (WCuO x ) heterostructure coupling. The strong interaction triggered by coupling-confinement confines the mobility of Cu species, preventing the agglomeration or the formation of large metal particles. Abundantly exposed catalytic sites with unique electronic structures optimized the adsorption activation of H 2 O and the reaction energy barrier. This study provides a novel and significant insight into the surface-confinement strategy and lays the foundation for the design of Cu-based catalyst site distribution.
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ChemistrySelect
·
2024
·Vol. 9
·期 46
·e202404170
·
IF 1.9
Pengtao Sheng,Haiyan Xu,Yaqi Zhang,Haiyue Xia,Haipeng Liu,Weili Li
Graphical We present a surfactant-associated controlled synthesis of copper (Cu)-deficient zinc (Zn)-doped Cu-indium (In)-selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems. The shape and size-controlled synthesis of colloidal I−III−VI quantum dots (QDs) can be attained only by a few synthesis strategies via the introduction of various high-boiling-point organic surfactants. To further investigate this strategy, in this study, we present a surfactant-associated controlled synthesis of copper (Cu)-deficient, zinc (Zn)-doped Cu─indium (In)─selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants, such as oleylamine (OLA), oleic acid (OA), and diphenylphosphine (DPP). OLA significantly promoted the quantum size effect-resultant emission wavelength red-shift, while OA controlled the homogeneous growth of QDs and improved the quantum yields. Moreover, Gaussian deconvolution of the photoluminescence spectra and the bandgap derived from the absorption spectra, by fitting, supported the fact that the radiative transition channels, especially for surface-trap-state-related transitions, are also dependent on the surfactants. Specifically, the conduction band electron-intragap state transitions and donor-acceptor transitions were present in all the prepared samples but accounted for different percentages. Furthermore, the surface-trap-state-related transitions significantly faded upon adding (i) OLA/OA as the sole surfactant to the cationic precursor and (ii) the OA + OLA + DPP mixture to the anionic precursor. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems.
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