ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Xiangnan Li,Ziya Zhang,Xiaojian Liu,Zhenpu Shi,Kaige Lu,Yanhong Yin,Hongyu Dong,Yange Yang,Baopeng Li,Huishuang Zhang,Shu-Ting Yang
The precise design of a high-entropy cathode material can achieve excellent performance. Many scholars have conducted extensive research on element design, but studies on the roles of each element are relatively scarce in high-entropy systems. In this project, we adjusted the composition of Cu/Co elements and developed three materials, NaNi0.25Fe0.15Mn0.3Ti0.1Ce0.02Co0.09Li0.1O2 (HEO-Co), NaNi0.25Fe0.15Mn0.3Ti0.1Ce0.02Cu0.06Co0.05Li0.1O2 (HEO-CC), and NaNi0.25Fe0.15Mn0.3Ti0.1Ce0.02Cu0.13Li0.11O2 (HEO-Cu). The physical properties and electrochemical performances are analyzed. The appropriate introduction of the Cu element can reduce the voltage difference between the redox potential and the electrochemical polarization. Moreover, it possesses outstanding air and structural stability. The appropriate proportion of the Co element can expand the interlayer spacing of the Na layer, increase the diffusion coefficient of Na+, and achieve excellent rate performance. The appropriate ratio of Cu and Co combines the advantages of both elements, endowing cathode materials with a stable structure, excellent air stability, and electrochemical performance. This work thoroughly explores the specific roles of Cu and Co elements, providing valuable insights for the design of high-entropy cathode materials and a practical pathway toward industrial-scale applications.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2026
·
IF 4.7
Ren Yue,Miao Yuhang,Ren Qinghui,Wang Shen,Zhang Liyi,Li Ling,Pan Dengke,Zhou Hua,Shao Mingfei
Biomass conversion to building blocks powered by renewable electricity offers a promising route toward low-carbon plastics, as exemplified by the electrooxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). However, this field is limited by a scalable electrocatalyst that can be operated at a large current. Here, we report a facile and scalable Cu-Co bimetal oxide (Cu-CoO x ) electrocatalyst for efficient HMF oxidation. Comprehensive studies reveal that Cu promotes hydroxyl adsorption to form Co(OH) 2 and converts to CoO x (OH) y via electrooxidation. The Cu-CoO x catalyst was evaluated in a continuous-flow reactor with 200 cm 2 of electrode area, achieving high Faradaic efficiency (92.49%) and selectivity (ca. 89%) toward FDCA at large operation currents (40–200 A). Moreover, this reactor was operated at 100 A for more than 100 h, reaching high single-pass conversion efficiency (96.5%) and FDCA selectivity (95.5%). This work provides a foundation for the development of stable and large-area electrodes to enable scalable FDCA electrosynthesis.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yi-Feng Lu,Li-Na Zhu,Yi-Lin Zhao,Xin Wang
In this work, a binder-free, self-supported Ni–In₂O₃ heterostructured electrode was constructed on three-dimensional Cu foam for the non-enzymatic electrochemical detection of H₂O₂ under near-neutral conditions. In₂O₃ was conformally grown on Cu foam through a solvothermal process followed by calcination, and Ni species were then introduced by electrodeposition to form a Ni-containing/In₂O₃ composite coating with close interfacial contact and a hierarchically rough surface. Owing to its reduced charge-transfer resistance and enlarged electrochemically accessible surface, the Ni–In₂O₃/Cu foam electrode exhibited a sensitive amperometric response toward H₂O₂ reduction in 0.1 M PBS (pH 7.4) at −0.60 V vs. SCE. Two linear ranges were obtained, from 0.6 μM to 1.759 mM and from 2.059 to 9.059 mM, with corresponding sensitivities of 18.492 and 9.799 μA·mM −1 ·cm −2 , respectively, and a detection limit of 0.228 μM (S/N = 3). The sensor also exhibited good anti-interference performance, acceptable repeatability and reproducibility, and stable performance over 25 days. In standard-addition analyses of milk, tap water, and fetal bovine serum, recoveries ranged from 99.3% to 104.7%, with low RSD values (0.07%–3.25%), and Student's t -test revealed no significant difference between the measured and nominal concentrations ( p > 0.05). Moreover, cytocompatibility evaluation and in situ monitoring of H₂O₂ released from PMA-stimulated cells demonstrated its potential applicability in cell-related redox analysis. These results demonstrate that the proposed Ni–In₂O₃/Cu foam electrode is a promising platform for sensitive, reliable, and practical H₂O₂ sensing under near-neutral conditions.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Dongling Meng,Zhiyan Chen,Zhibin Chen,Junrao Cen,Chengwei Lin,Yaling Yang
Herein, a novel bimetallic (Fe,Cu/His) nanozyme with high peroxidase (POD)-like activity for colorimetric assaying of glucose was designed. Assisted by glucose oxidase (GOx), glucose could be specifically converted into H2O2 for oxidizing chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) catalyzed by Fe,Cu/His to generate blue oxTMB with absorption at 654 nm. Specifically, Fe,Cu/His exhibits excellent POD-like activity due to ascorbic acid with reducing properties to ensure the formation of binary-valence metal pairs (Fe3+/Fe2+ and Cu2+/Cu+), thus enhancing electron transfer during the catalytic process. Based on the cascade reaction of GOx and the Fe,Cu/His nanozyme, a sensitive colorimetric assaying platform for glucose detection was constructed with a good linear range of 5–1000 µM and a calculated limit of detection of 1.44 µM. This proposed method was applied to assay glucose in tobacco samples sensitively and accurately.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Lang Ge,Tianshun Xiong,Yingchao Wei,You Li,Wenyuan Ma,Anguo Cui,Dongjie Liu,Min An,Yubo Luo,Junyou Yang
The AlN/Cu composite substrate is promising for power electronic packaging. However, the large coefficient of thermal expansion (CTE) mismatch among AlN, Cu, and AgCuTi fillers generates high residual stresses, undermining joint reliability. We design AgCuTi/FeZr 2 fillers to lower the CTE of the brazed seam in AlN/Cu joints. Results show that FeZr 2 doping improves joint performance, raising the shear strength to 124.0 MPa at 5 wt.% (≈83% above the undoped joint) and enhancing thermal-shock resistance. Turner-model calculations and finite-element analysis indicate that FeZr 2 lowers the CTE of the composite filler and thus reduces the interfacial residual stress. Microstructure reveals that excessive FeZr 2 results in pronounced thinning and local discontinuity of the TiN reaction layer by reducing the availability of active titanium ([Ti]) involved in the interfacial reaction. These findings demonstrate that AgCuTi/FeZr 2 fillers provide an effective route to low-stress, high-reliability AlN/Cu brazed substrates when the FeZr 2 content is kept at an appropriate level.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Xiaoya Yuan,Lei Ouyang,Zhou Song,Xuelin Dong,Zhenli Zhu,Qin Shuai,Shenghong Hu
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) present a serious risk to ecosystems and human health, underscoring the need for highly sensitive detection methods. Existing analytical approaches often lack the portability and rapid response required for on-site screening, and conventional surface-enhanced Raman spectroscopy (SERS) substrates exhibit limited affinity toward hydrophobic PFAS molecules. To overcome these limitations, we designed a superhydrophobic nano-Cu modified Ag foam that integrates hydrophobic enrichment with specific metal-carboxylate coordination for effective perfluorooctanoic acid (PFOA) capture and detection. The critical role of Cu 2+ as a bridging site for selective PFOA adsorption was elucidated. This design achieves a remarkably low detection limit of 0.1 μg L −1 for PFOA and enables discrimination between different PFAS categories. Moreover, it maintains excellent SERS activity after two months of storage, effectively addressing the issue of facile oxidation of Cu. The substrate was successfully applied to detect PFOA in various real water samples, demonstrating its potential as a practical and powerful platform for environmental PFAS monitoring.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
He Bu,Qingling Zhao,Jie Gao,Zixuan Zhang,Ze Liu,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Shuquan Zhang,Xinghua Zhang
Fluorescent carbon dots (CDs) derived from traditional Chinese medicine (TCM) face limitations in water solubility and tunable emission, hindering their biomedical application. To address this, we synthesized baicalin-based CDs and engineered their surface with cetyltrimethylammonium chloride (CTAC) and Cu ions. This sequential modification first shifted the emission from blue to orange by introducing N/O-containing functional groups that reduced the energy gap. Subsequent Cu incorporation created Cu-related energy levels, further narrowing the gap to achieve red emission at 660 nm alongside enhanced solubility. In addition, the resulting Cu/CTAC-CDs served as a selective fluorescent probe for histidine, enabling its sensitive detection in complex matrices such as pig blood and milk. This work provides a viable route to fabricate water-soluble, emission-tunable TCM-derived CDs and offers fundamental insights into surface-state-controlled luminescence, advancing their development for biomedical applications.
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Journal of Materials Chemistry C
·
2026
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IF 5.1
Weiqi Yu,Hao Qiu,Menghui Lin,Xiaolong Zhang,Shunwei Chen,Zifei Wang,Ming-Zhi Wei,Conghui Si,Xiujun Han,Xujun Zheng
Small organic molecule-based therapeutic systems that integrate near-infrared (NIR) photothermal activity with Cu²⁺-mediated functionality as an orthogonal therapy pathway remain scarce. Herein, we demonstrate that coordination of Cu²⁺ with a small photothermal agent induces a pronounced bathochromic shift of light absorption into the NIR region and enables effective dual-mode antibacterial activity. Two rationally designed molecules, BTAA-Me and BTAA-Et, feature a photon-driven rotating imine bond that promotes efficient non-radiative excited-state decay for high photothermal conversion, together with a bis-benzothiazole motif that serves as a selective Cu²⁺ coordination site. The resulting complex, Cu²⁺@BTAA-Et, exhibits pronounced bactericidal activity against Staphylococcus aureus and Escherichia coli under 808 nm laser irradiation, markedly outperforming either photothermal treatment with BTAA-Et or Cu²⁺ treatment alone. Static density functional theory (DFT) calculations and excited-state dynamics simulations based on time-dependent DFT (TD-DFT) systematically elucidate the underlying mechanisms. This work provides mechanistic insights into the rational design of dual-mode biomedical materials that synergistically combine photothermal effects with metal ion-mediated activity.
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CATALYSIS LETTERS
·
2026
·Vol. 156
·期 10
·292
·
IF 2.5
Liu Xi,Wu Wenjian,Wang Ran,Li Rongkang,Li Yafei,Hou Jie,Xiao Fuquan,Zhu Linhua
Heterointerface engineering is a catalyst design strategy based on the symbiotic growth of heterogeneous metal oxides. This strategy endows electronic structures, surface properties, and generation of active centers that are unavailable in the individual oxides. It can even generate entirely new active sites, thereby significantly enhancing catalytic performance. Herein, we prepared MoO 3 @Cu x O with symbiotic MoO 3 and CuO as a catalyst for aerobic catalytic oxidative desulfurization. Notably, after symbiosis, the catalyst exhibits new low-valence Cu + active sites absent in the individual oxides, along with defective interfaces more favorable for catalytic reactions and enhanced surface redox properties. Catalytic testing validates these findings: these new low-valence Cu + active sites enable the activation of superoxide radicals, achieving 100% desulfurization of aromatic sulfur compounds under air atmosphere within 5 h. Through the rational design of symbiotic heterogeneous metal oxides, this study not only highlights the pivotal role of heterointerface engineering in catalytic oxidation but also offers an effective strategy for designing oxidative desulfurization catalysts. Graphical
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Ji Liu,Long-peng Fang,Yuan-gu Xia,Meng-fan Liu,Jia-he Wang,He-ming Liu,Bin Hu,Kai Li,Zhen-xi Zhang,Qiang Lu
Trace Ag (Ag/Cu = 0.001) significantly enhanced Cu-Zn catalyzed CO 2 hydrogenation. • STY MeOH of Cu-Zn-Ag 0.001 was 467.8 g·kg −1 ·h −1 , 1.82 times higher than Cu-Zn. • Ag promotes oxygen vacancy formation around active sites at the Cu-ZnO interface. • Methanol synthesis follows the formate pathway with Ag lowering energy barriers. The methanol synthesis from catalytic CO 2 conversion has emerged as an attractive strategy for carbon valorization and sustainable energy generation. However, the catalytic efficiency of conventional Cu-Zn-based catalysts remains far from satisfactory. Herein, a Cu-Zn-Ag catalyst, synthesized via a facile co-precipitation method, exhibited a significantly improved methanol production activity compared with Cu-Zn catalysts. Notably, a trace amount of Ag doping (the Ag/Cu molar ratio was 0.001) could significantly elevate the methanol generation, with its space-time yield increasing from 258 ± 17 to 468 ± 23 g MeOH ·kg cat −1 ·h −1 , an increase of 1.82 times, while further increasing Ag doping would lead to reduced activity. Structural characterizations confirmed the Ag presence, being doped in the Cu lattice, and Ag doping was significantly beneficial to oxygen vacancy formation, which was deemed the active sites for methanol formation. The detailed reaction pathway (formate pathway) for methanol synthesis was also investigated based on density functional theory (DFT) calculations, where Ag doping lowered the energy barriers. This work elucidates the mechanism of Ag doping in Cu-Zn catalysts and provides key insights into the reaction mechanism of CO 2 hydrogenation to methanol, highlighting its potential for sustainable methanol synthesis. Download: Download high-res image (177KB) Download: Download full-size image
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MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Huadong Ye,Haohao Zou,Xinru Gong,Weiwei Zhu,Ying Han,Pan Dong,Xu Ran
A 3 vol% Ti 3 C 2 Tx@Ag addition achieves a strength–ductility synergy in Cu composites. • The Ag decoration improved MXene dispersion and interfacial bonding with Cu. • The Ti 3 C 2 Tx@Ag/Cu composites exhibited enhanced mechanical and tribological properties. Aerospace, rail transportation, and electronics require Cu-based materials with high thermal conductivity together with adequate mechanical and tribological performance. However, the relatively low strength, hardness, and wear resistance of Cu limit its use under demanding service conditions. Herein, Ti 3 C 2 T x MXene nanosheets were decorated with Ag nanoparticles, and Ti 3 C 2 T x @Ag/Cu composites were fabricated by ball milling followed by fast hot-press sintering. Ag nanoparticles were uniformly distributed on the Ti 3 C 2 T x surfaces, and the addition of Ti 3 C 2 T x @Ag progressively refined the Cu matrix grains from 5.31 μm in pure Cu to 1.24 μm at 10 vol% reinforcement. The 3 vol% Ti 3 C 2 T x @Ag/Cu composite exhibited the best strength–ductility balance, with an ultimate tensile strength of 288.5 MPa and an elongation of 41.8%, compared with 255.3 MPa and 37.6% for pure Cu, respectively. The hardness increased continuously from 48 to 116 HBW, whereas thermal conductivity showed a non-monotonic dependence on reinforcement content. Ti 3 C 2 T x @Ag produced only a modest change in the average friction coefficient but markedly improved wear resistance; the wear rate decreased from 21.24 × 10 −5 mm 3 ·(N·m) −1 for pure Cu to 6.29 × 10 −5 mm 3 ·(N·m) −1 at 10 vol%, corresponding to a 70.4% reduction. Worn-surface, wear-debris, and cross-sectional observations indicate that the improved wear resistance is mainly associated with suppressed cracking and large-scale material spalling, while friction-induced mechanical mixing and oxidation may provide an additional contribution. These results demonstrate that Ag-decorated Ti 3 C 2 T x is an effective reinforcement for jointly regulating the mechanical, thermal, and tribological behavior of Cu composites.
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LANGMUIR
·
2026
·
IF 4.4
Honglin Li,Yingqi Duan,Qingwen Feng,Linjiao Wei,Jingbin Zeng,Ziyue Chen,Qingtong Zhang,Yanpeng Chen,Zifeng Yan
Ag–Cu tandem catalysis provides an effective strategy to enhance C2+ selectivity in the electrochemical CO2 reduction reaction (CO2RR) by integrating CO generation and utilization for C–C coupling. Here, we report a series of Ag@Cu2O, Ag@CuO, and Ag@CuO-BDC core–shell catalysts designed to regulate the CO generation, Cu-oxidation states, and surface structures. The Ag@Cu2O catalysts exhibit pronounced tandem effects, suppressing CH4 formation while enhancing the C–C coupling on the Cu sites. Notably, Ag@Cu2O-30 achieves a high C2H4/CH4 Faradaic efficiency ratio of 6.5 at −1.8 V (vs RHE) with an increased C2H4 partial current density of 12.3 mA cm–2. Oxidation to Ag@CuO further modifies the Cu species distribution, facilitating CO and CO2 diffusion while reducing H2 formation. Moreover, constructing Cu-BDC-MOF followed by electrochemical reconstruction generates additional oxygen vacancies and stabilizes Cu+ species, enhancing C2H4 selectivity and stability but with increased CH4 formation and reduced current density. This study highlights Ag–Cu tandem catalysis and structural regulation of Cu as effective strategies for achieving selective reduction of CO2 toward C2H4.
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