JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2025
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IF 3.8
Yu Su,Bo Zhang,Xiang Cheng,Kun Du,Leqing Feng,Wei Zhao
Herein, a novel sunlight-independent tribocatalytic system with efficient friction energy harvesting capability is proposed. This system demonstrates enhanced tribocatalytic performance of cerium oxide (CeO 2 ) nanoparticles driven by the friction between Cu coated on the glass beaker bottom and a Teflon (PTFE) magnetic disk. An apparent rate constant of 0.045 min −1 was achieved for methylene blue (MB) degradation, representing a 2.7-fold improvement over the CeO 2 @glass/PTFE system (0.01682 min −1 ). Notably, the system achieved > 90% degradation efficiency for high-concentration MB solutions (40 mg/L), surpassing the performance of previously reported tribocatalytic systems. Through multiscale tribo-interface characterization and radical trapping experiments, the synergistic catalytic mechanism was elucidated: Friction-induced charge carriers in CeO 2 are efficiently transferred via the interfacial electronic effects of the Cu/PTFE friction couple and the active surface with Ce 3+ /Ce 4+ redox couples. Electron paramagnetic resonance analysis confirmed that Cu coating modification on the surface of the beaker bottom enhanced hydroxyl radical (·OH) yield by 2.3-fold compared to glass, enabling complete pollutant degradation through hole (h + )-dominated oxidation pathways. This work transcends conventional catalyst modification strategies, establishing a new paradigm for interface engineering in mechano-chemical energy conversion systems.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Manqing Li,Chunyang Lu,Jie Ren,Abdallah A. Elsherbiny,Taida Wei,Dejin Qiu,Yaowei Yu
With the widespread utilization of biomass resources, the released sulfurous gases during its pyrolysis will cause environmental pollution. The Cu-Y adsorbent offers an effective solution to this issue due to its superior sulfur adsorption capacity. In this study, the effects on the performance of biochar and the sulfur adsorption capacity of the adsorbent were investigated by adjusting the Cu loading and the co-pyrolysis temperature. The results indicated that increasing both these parameters will facilitate the decomposition of organic sulfur in biochar, leading to the formation of sulfurous gases. The 15 wt% Cu-Y adsorbent exhibited the best synergistic catalytic-adsorption performance at 300 °C, achieving a maximum sulfur adsorption capacity of 9.88 mg S/g. And the biochar desulfurization efficiency reached 83.7 %. Characterization analysis revealed that excessive Cu loading (>15 wt%) reduced the specific surface area and mesopore volume of the Cu-Y adsorbent. Furthermore, Cu species tend to aggregate into metal clusters ranging from 130 to 300 nm, which can mask active sites and consequently reduce the adsorption capacity. Additionally, high temperature (350 °C) caused the structural collapse of the Cu-Y adsorbent, leading to a significant decline in sulfur adsorption capacity. This study further clarified the adsorption mechanism of various sulfurous gases, including dimethyl disulfide (C 2 H 6 S 2 ), dimethyl sulfide (C 2 H 6 S), carbonyl sulfide (COS), carbon disulfide (CS 2 ), thiophene (C 4 H 4 S), methanethiol (CH 3 SH), and hydrogen sulfide (H 2 S). These results confirmed the dual functionality of Cu-Y adsorbent in enhancing biochar quality and adsorbing sulfur emissions, providing a sustainable strategy for cleaner biomass conversion.
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APPLIED CATALYSIS A-GENERAL
·
2025
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IF 4.8
Weijia Pu,Zhihui Li,Binxiong Guang,Yahui Xiao,Yong Liu
In this study, an ordered mesoporous carbon (OMC) was synthesized by coordination induced self-assembly, in which the tannin was used as carbon precursor, Cu 2 + and Ce 3+ cations were as both crosslinking agents and catalyst precursors. The results indicated that the Cu 0 , Cu + and oxygen vacancies were in-situ formed by self-reduction of the nascent CO gas during carbonization, and well-dispersed within the OMC substrate. Moreover, the resulting Cu + species and oxygen vacancies were firmly stabilized in the Cu-CeO x interfaces induced by the strong electronic interaction between Cu 0 and CeO 2 . Simultaneously, the OMC substrate created abundant ordered mesoporous structure to disperse and confine the Cu-CeO x species. The balanced Cu 0 and Cu + species in the Cu-CeO x @OMC catalysts synergistically boosted the hydrogenation of cyclohexyl acetate. Benefited from those, the Cu-CeO x @OMC-550–3 catalyst exhibited the excellent activity and stability for hydrogenation of cyclohexyl acetate into cyclohexanol even without reduction by hydrogen. Specifically, under the optimal reaction conditions of 250 °C, 4 h, 4 MPa H 2 and 50 mg catalyst dosage, the cyclohexyl acetate conversion and selectivities of cyclohexanol and ethanol achieved 95.9 %, 96.6 % and 98.4 %, respectively. Moreover, the catalyst showed no significant changes in structure and activity after five reusing times, delivering robust stability and reusability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Guo-Feng Qiu,Yu-Tian Zhang,Miao-Miao Shi,Fei-Fei Zhang,Xue-Feng Sun,Zhe Meng,Bo Bi,Yi-Chen Guo,Quan-Qing Li,Jun-Min Yan
Ammonia (NH 3 ) is one of the important chemicals in human society. Conversion of air and water to NH 3 by plasma treatment and electrocatalytic reduction is a prospective approach. Herein, a self-supported CuCo/Cu nanowires (NWs) catalyst is prepared through simple electrochemical methods, achieving exceptional eNO x - RR performance: 99.8% Faradaic efficiency and 230.3 mg h -1 cm -2 NH 3 yield rate at -0.7 V vs. RHE in 1 M NaOH with 0.2 M NO x - . The 3D NWs architecture provides abundant exposed active sites, significantly improving the catalyst's NO x - reduction activity. Besides, the introduction of Co modulates the electronic structure of Cu while serving as a complementary site for active hydrogen (*H) supply, thereby synergistically promoting the eNO x - RR process. Finally, CuCo/Cu NWs serve as a bifunctional catalyst coupled with the anodic hydrazine oxidation reaction (HzOR) instead of the oxygen evolution reaction (OER), effectively reducing the energy consumption of the eNO x - RR system and achieving a greener and energy conservation route for the synthesis of NH 3 .
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ChemSusChem
·
2026
·Vol. 19
·期 1
·e202501680
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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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APPLIED SURFACE SCIENCE
·
2021
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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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FUEL
·
2021
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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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FOOD CHEMISTRY
·
2026
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IF 9.8
Yunling Shao,Miao Wang,Jianpeng Zhang,Yongxin She,Zhen Cao,Guohua Zhang,Fen Jin,Jing Wang,A.M. Abd El-Aty
In this study, we constructed a peptide‑copper (peptide-Cu) mimetic enzyme for thiram detection. The enzyme mimics peroxidase-like activity (POD), which allows it to catalyze the oxidation of o -phenylenediamine (OPD) substrates in the presence of hydrogen peroxide (H₂O₂). Thiram can prevent the catalytic activity of peptide-Cu mimetic enzymes by surface blocking, inhibiting chromogenic substrate oxidation and facilitating the rapid detection of thiram. The inhibitory mechanism was elucidated through molecular dynamics (MD) simulations and density functional theory (DFT) calculations, revealing that thiram synergistically reduces the catalytic activity of the peptide-Cu mimetic enzyme by disrupting its structural stability and electronic properties. Thiram exhibited good linearity in the concentration range from 0.01 to 5 μg/mL, with a lowest limit of detection (LOD) of 0.048 μg/mL, and showed a good recovery range from 79.71% to 108.13% in real samples. This approach, based on peptide-metal complexes, offers a straightforward and affordable method for pesticide monitoring.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
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IF 8.7
Ming Jiang,Xueyu Man,Moya Yang,Qiwei Yan,Haijuan Wu,Feng Yang,Youhuan Wei
DNA serves as the primary target for numerous metal complexes in suppression tumor cell proliferation, and Poly ADP ribose polymerase-1 (PARP-1) is critical for DNA repair. In this study, benzothiazole hydrazone was used as a framework to design and synthesize a series of Cu(II) complexes (Cu1-Cu3), which functions as novel PARP-1 inhibitors. These Cu(II) complexes not only effectively inhibited the proliferation of a panel of tumor cells (IC 50 range: 0.51–5.37 μM) but also exhibited potent PARP-1 inhibitory activity (IC 50 range: 0.45–1.52 μM). Notably, complex Cu3 had the most potent activities, exhibiting strong cytotoxicity against T98G cells (IC 50 = 0.51 μM) and significant PARP-1 inhibition (IC 50 = 0.45 μM). Additionally, Cu3 effectively inhibited the migration of T98G cells. Mechanistic studies revealed that Cu3 generated excessive reactive oxygen species (ROS), induced DNA damage, exacerbated DNA double-strand breaks by inhibiting PARP-1 activity, and promoted apoptosis in tumor cells via the mitochondrial pathway.
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MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Bi Wang,Jian Huang,Lili Wang,Chengxu Lin,Caihang Liang,Qi Feng,Hongbo Qin
Herein, Cu@Sn core–shell particles were prepared and used to formulate a novel transient liquid phase sintering composite paste. Composite joints fabricated from this paste achieved low-temperature bonding while offering excellent mechanical strength and high-temperature service capability. Cu@Sn particles with a uniform Sn shell were produced via electroless tin plating, and the effect of the Cu@Sn: Sn mass proportions on the shear strength of the joints was systematically evaluated. The joints prepared by sintering the paste with a Cu@Sn: Sn mass proportion of 6:4 at 260 °C under 10 MPa pressure for 15 min achieved a shear strength of 106.84 MPa at 25 °C and retained 94.26 MPa at 300 °C. Microstructural characterization revealed that appropriate addition of Sn particles effectively regulated the formation and distribution of intermetallic compounds (IMCs) and markedly reduced the porosity of the sintered layer. The formation of fine-grained Cu 3 Sn substantially enhanced the joint strength; meanwhile, the development of subgrains and low-angle grain boundaries on the Cu substrate side of the substrate/sintered layer interface improved the interfacial bonding. The accumulation of dislocations at the soft Cu particles against the hard IMC phases generated back stress and increased strain hardening, promoting hetero-deformation induced strengthening in the heterostructured materials. Twin boundaries observed in some Cu cores also acted as barriers to dislocation motion, promoting dislocation storage while preserving the plasticity of the Cu phase, thereby further increasing the strength of the Cu@Sn composite joints.
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Surfaces and Interfaces
·
2026
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IF 6
Yongjun Song,Yi Zhou,Dongli Guo,Yahui Shi,Jiawei Liang,Haoran Li,Dongjin Wan
An innovative ACF/CC@FeOCl-assisted FTEF-SR system was established. • FeOCl-Cu served as catalyst for the electro-Fenton and as a PMS activator. • The primary generated reactive oxygen species were • OH and SO 4 · − . • Preferential removal of sulfamethoxazole was achieved in different water matrices. • The system exhibits good stability and energy-saving performance. Sulfamethoxazole (SMX), a representative sulfonamide antibiotic contaminant, poses significant environmental risks. Peroxymonosulfate (PMS) activation-driven electro-Fenton (EF) processes have attracted considerable attention for the removal of organic pollutants from water. In this study, a flow-through heterogeneous EF system integrated with PMS activation (FTEF-SR) was developed using a FeOCl-Cu-modified carbon cloth cathode for the efficient degradation of SMX. The FTEF-SR system exhibited broad pH adaptability and excellent recyclability. Under optimized conditions, near-complete removal of SMX (>99%) was achieved within 60 min. Meanwhile, the effects of catalyst dosage and ratio, current, PMS concentration, electrolyte type, pH, as well as initial concentration were systematically investigated. At a current density of 9 mA cm⁻ 2 and a PMS concentration of 1 mM, SMX and total organic carbon (TOC) removal reached 98.9% (30 min) and 80.2% (180 min), respectively. Moreover, the real-world water matrix and common coexisting ions did not significantly inhibit the removal efficiency of SMX, still maintaining above 92%, indicating that this coupling method was feasible in real application. Quenching experiments and electron paramagnetic resonance (EPR) tests revealed that • OH and SO 4 •– dominated the degradation of SMX in the FTEF-SR system. Overall, this work not only advances the development of efficient and sustainable wastewater purification technologies but also provides valuable mechanistic insights for the degradation of antibiotic contaminants. Download: Download high-res image (478KB) Download: Download full-size image
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Yannan Ma,Runzhong Yu,Boxiang Yao,Jiayu Chen,Han Zhang,Liyuan Zhang
A copper metal-organic framework composite nanozyme (Cu-MOF) with peroxidase-like activity was prepared using an improved room temperature method. Cu-MOF can catalyze H 2 O 2 to release (•OH), thereby oxidizing the colorless chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue oxidized product (oxTMB), which has a maximum UV absorption peak at 652 nm. Nicosulfuron can regulate the electronic balance of the redox pair (Cu 2+ /Cu + ) on the Cu-MOF surface, thereby enhancing its peroxidase activity and promoting the deepening of the TMB blue color. Based on this principle, a colorimetric detection method for nicosulfuron was established. The linear range of this method is 0.2–10 μg/mL −1 , and the detection limit is 0.02 mg/kg. This method has been applied for the detection of nicosulfuronin corn samples, with recovery rate ranging from 90.88% to 117.33%, and all relative standard deviation being less than 4%.
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