RARE METALS
·
2026
·Vol. 45
·期 8
·e70443
·
IF 12.1
Weinan Yao,Wenzhuo Sun,Mengjiao Wu,Nana Li,Wenting Li,Xiaotian Guo,Bin He,Huan Pang
en This link goes to a English section zh This link goes to a Chinese section A facile coprecipitation-pyrolysis strategy was employed to fabricate Cu/Co nanoparticles (NPs) embedded in nitrogen-doped carbon matrices (Cu/Co@N-C) through the carbonization of CuCo-MOF precursors. Moreover, monometallic counterparts of Cu@N-C and Co@N-C were also prepared via carbonization of bimetallic CuZn-MOF and CoZn-MOF, respectively. Electrochemical tests confirm that Cu acts as the key active center for nitrite oxidation. By adjusting the Cu/Co molar ratios, a series of cubic Cu/Co@N-C composites with tunable sizes of 200–500 nm were achieved. The synergistic interaction between metallic Cu/Co NPs and the conductive N-C framework enhances catalytic activity and reduces overpotential compared to the monometallic Cu counterpart. The optimized Cu/Co@N-C/glass carbon electrode (GCE) sensor delivered a superior sensitivity as high as 0.461 μA μM −1 cm −2 and wide detection range of 2–10000 μM. The Cu/Co@N-C/GCE sensor also demonstrated superior selectivity, long-term stability of 92.5% retention after 21 days, and reproducibility. This work establishes a versatile approach for engineering various MOF-based catalysts, demonstrating promising potential for applications in environmental monitoring and food safety analysis. 摘要 en This link goes to a English section zh This link goes to a Chinese section 采用一种简便的共沉淀–热解策略 , 以 CuCo-MOF 前驱体为碳源进行碳化 , 成功制备了氮掺杂碳基质负载的 CuCo 双金属纳米颗粒复合材料(Cu/Co@N-C)。此外 , 还分别基于双金属CuZn- MOF和CoZn-MOF碳化制备了Cu@N-C和Co@N-C。电化学测试表明Cu是亚硝酸盐氧化的关键活性中心。通过调控 Cu/Co 摩尔比 , 获得了粒径可调、尺寸范围为 200–500 nm 的立方体 Cu/Co@N-C 复合材料。与单金属Cu@N-C相比 , 金属Cu/Co NPs与导电N-C框架之间的协同作用增强了催化活性并降低了过电位。优化后的 Cu/Co@N-C/玻碳电极(GCE) 传感器表现出优异的电化学传感性能 , 其灵敏度高达 0.461 μA μM −1 cm −2 , 检测范围宽达 2–10000 μM。Cu/Co@N-C/GCE 传感器还展现出优异的选择性、良好的重复性以及长期稳定性 , 在存放21天后仍可保持 92.5% 的电流响应。该工作为构筑各种MOF 基催化材料提供了一种通用策略 , 显示出其在环境监测与食品安全分析领域的广阔应用前景。
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Energy Technology
·
2026
·Vol. 14
·期 8
·e70614
·
IF 3.6
Bing Zhang,Yu Zhang,Zhengxin Lu,Song Zhou,Ping Li,Kui Xu,Yonghua Chen
Electrocatalytic CO 2 reduction reaction (CO 2 RR) stands as a pivotal strategy for the selective conversion of CO 2 into high-energy-density hydrocarbons, offering a promising avenue for carbon neutrality. Cu-based electrodes have emerged as a highly potential platform for the production of diverse products, yet their practical application is hindered by the crystallization regulation of electrocatalysts achieving high selectivity for multielectron products. Here, we report Cu-based electrodes, deposited on carbon paper via facile one-step coelectrodeposition methods, for efficient electrocatalytic CO 2 RR. The introduction of trace Ni was found to smooth the surface of Cu-based electrocatalysts, thereby facilitating the electron transfer at the catalytic interface. For CuNi 0.3% electrode, a maximum Faraday efficiency of 30.5% and a CH 4 yield rate of 16.4 mg h −1 cm −1 were achieved at −1.4 V versus RHE, outperforming the Cu electrode (17.9% FE) and the CuNi 0.6% electrode (26.9%). This enhancement might be attributed to the superior surface of the CuNi 0.3% electrocatalyst, with the trace amount of Ni 2+ codeposition playing a critical role in optimizing the smooth surface of the Cu electrode. Density functional theory calculations further revealed that Ni addition is thermodynamically favorable for the deep hydrogenation of *CO by lowering the formation energies of *CO and *COH intermediates.
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Sustainability
·
2026
·Vol. 18
·期 16
·8079
·
IF 4.1
Hao Liu,Deli Wu,Yufan Chen,Chengsi Hou,Guojie Ye,Zhengwei Zhou,Yue Wang
4-Chlorophenol (4-CP) is a persistent and highly toxic pollutant commonly found in groundwater. However, its efficient degradation remains challenging due to the rapid agglomeration of conventional zero-valent iron (ZVI) nanoparticles, their narrow pH operating range, and the environmental risks associated with synthetic chelating agents. To address these limitations, this study presents a rationally designed catalytic system integrating cyclodextrin polymer (CDP)-supported bimetallic Cu-Fe nanoparticles (Cu-Fe-CDP) with citric acid (CA) as a green complexing agent. The porous CDP matrix effectively mitigates nanoparticle agglomeration and provides abundant active sites, while the Fe-Cu bimetallic coupling accelerates electron transfer and iron corrosion. Critically, CA acts as a biocompatible ligand that sustains Fe(II)/Fe(III) redox cycling, expands the effective pH range, and enhances hydroxyl radical (·OH) generation. The system achieves 92.13% degradation of 4-CP within 80 min at pH 9.0 and nearly complete removal at pH values between 3.0 and 7.0. Mechanistic studies, including electron paramagnetic resonance (EPR) spectroscopy and radical quenching tests, confirm the dominance of ·OH radicals (82.67% inhibition by TBA) and the essential role of surface Fe(II)/Fe(III) cycling. The catalyst exhibits excellent reusability, broad-spectrum activity toward multiple pollutants, and sustained performance in real water matrices and long-term column tests with minimal metal leaching. This work demonstrates a chemically robust strategy for chlorophenol remediation using green citric acid and biodegradable CDP without exogenous oxidant addition, showing promise for further development toward practical applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Peng Gu,Yihe Fan,Jin Liu,Zhuang Cai,Jiannan Du,Yidong Song,Ying Dai,Guofeng Wang,Jinlong Zou
Size-controllable Cu 2 O nanocubes grow in-situ on AMXene via Oswald-ripening mechanism. • Cu 2 O induces MXene amorphization, generating edge-ligand unsaturated sites for HER. • The electron-rich Cu + boosts orbital hybridization for selective glycerol oxidation. • The catalyst requires only 1.31 V electrolyzer voltage with stability exceeding 150 h. Glycerol oxidation reaction (GOR) is a mild, sustainable pathway with great potential for producing high-value chemicals such as formic acid (FA). Integrating GOR with hydrogen evolution reaction (HER) circumvents the high energy barrier of anodic oxygen evolution in traditional water splitting. However, achieving selective C C bond cleavage in glycerol-to-FA conversion remains a major technical and scientific challenge. Here, via the Ostwald ripening mechanism, size-tunable cuprous oxide nanocubes are in-situ grown on amorphous MXene (Cu 2 O/AMXene), creating well-defined dual active sites with clear functional division: electron-rich Cu + for GOR and Ti sites for HER. The optimized Cu 2 O-0/AMXene (28 nm Cu 2 O) delivers a HER overpotential of 32 mV at 10 mA cm −2 , a GOR potential of 1.13 V at 10 mA cm −2 , and a full electrolyzer voltage of 1.31 V, while maintaining excellent catalytic efficiency after 150 h of continuous operation. Cu 2 O growth induces MXene amorphization, generating edge ligand-unsaturated Ti sites that enhance water dissociation for proton supply, while Ti 4+ promotes hydrogen spillover to transfer protons to Ti 3+ for efficient HER. Electron-rich Cu + forms asymmetric Ti-O-Cu interactions via electron donation from AMXene, enhancing orbital overlap with p orbitals of glycerol oxygen atoms for GOR. This electron-rich environment inhibits Cu + oxidation to Cu 2+ at high anodic potentials, stabilizing the active s - p hybrid configuration. This work also highlights the critical role of O-functional groups on AMXene and lattice O atoms in Cu 2 O for strengthening metal-support interactions. Download: Download high-res image (225KB) Download: Download full-size image
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PubMed
高影响因子
CATALYSIS LETTERS
·
2026
·Vol. 156
·期 8
·229
·
IF 2.5
Sun Zeyun,Wang Jiapan,Pu Weijia,Liu Yang,Xiao Yahui,Pu Yanfeng,Zhao Junwei,Liu Yong
The hydrogenation of esters to corresponding alcohols is a crucial yet challenging process in sustainable chemistry, demanding efficient and stable non-noble metal catalysts. In this study, a CuZnO x /CeO 2 metal-oxide catalyst was synthesized via a metal-organic framework (MOF)-derived route for the hydrogenation of cyclohexyl acetate. The catalyst, featuring highly dispersed Cu species and low Cu loading (11.4wt%), was obtained by calcining a Ce-MOF precursor incorporated with Cu and Zn. By modulating the reduction temperature, the mixed valence state Cu 0 and Cu + active species were observed to coexist on the catalyst surface. After systematic investigation of structure-activity relationship in catalytic hydrogenation, and the optimized CuZnO x /CeO 2 -400-350 catalyst reached 99.9% conversion of cyclohexyl acetate, with selectivity of 98.2% to cyclohexanol under mild conditions (240 °C, 3 MPa H 2 , 11.4 wt% Cu loading in actual, 4 h). Moreover, it exhibited outstanding recyclability, maintaining over 99.0% conversion and above 97.0% cyclohexanol selectivity after five cycles. XRD and XPS analyses revealed no significant changes in the crystal structure or Cu 0 /Cu + species after reaction, confirming excellent resistance to sintering and remarkable structural stability. This work affords a feasible way for designing high-performance catalysts for ester hydrogenation, demonstrating significant potential for industrial application. Graphical
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yufeng Liu,Xiaofan Yang,Jinghua Hu,Junhao Liu,Peiwen Wu,Huifang Cheng,Huaming Li,Jixing Liu,Wenshuai Zhu
The hydroisomerization of isobutane is of considerable practical significance for the development of low-carbon and high-efficiency ethylene production technologies. However, conventional noble metal-solid superacid catalysts used for this reaction suffer from drawbacks including high cost and catalyst deactivation caused by the loss of halogen species and other active components. Herein, a series of highly dispersed W-Cu/Beta catalysts were designed and prepared via a facile ion-exchange method, and their catalytic performances toward isobutane hydroisomerization were systematically investigated. The results show that the introduction of WO x species effectively suppresses strong Brønsted acid sites of the Beta zeolite and modifies the Brønsted/Lewis acid balance of W-Cu/Beta catalysts. Although both Brønsted and Lewis acid site concentrations decrease with increasing W loading, Brønsted acidity is reduced to a greater extent, resulting in a lower Brønsted/Lewis acid site ratio. This acidity regulation is associated with suppression of undesired cracking reactions and improved selectivity toward n-butane. Under reaction conditions of 2 MPa, 380°C, and a weight hourly space velocity of 2.0 h ‒1 , the 5%W-Cu/Beta catalyst exhibits the best catalytic performance with isobutane conversion of 62.3% and n-butane yield of 32.4%. This enhanced catalytic behavior is attributed to optimized acidity and an appropriate distribution of catalytic active sites. Kinetic analyses indicate that WO x introduction alters the apparent kinetic behavior of the catalysts and is accompanied by an increase in apparent activation energy. The improved catalytic selectivity is correlated with changes in acidity distribution and suppression of cracking pathways rather than direct evidence of carbocation stabilization.
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Metals
·
2026
·Vol. 16
·期 7
·738
·
IF 3.1
Zimeng Zhang,Chenghao Zhang,Qian Cheng,Chun Li,Xiaoqing Si,Zongjing He,Lin Cao,Chengxian Li,Shisheng Huang,Jun Wang,Yang Liu
The reliable joining of graphite and Cu holds significant promise for applications in electronic heat dissipation and sliding electrical contacts. However, the substantial differences in their physicochemical properties, poor wettability, and mismatch in coefficients of thermal expansion often result in low joint strength. In this study, a two-step joining strategy combines surface modification with low-temperature sintering, and this is proposed for fabrication of Cu/graphite joints. First, the graphite surface is modified using an AgCuTi active filler alloy under vacuum conditions. Ti preferentially segregates at and reacts with the graphite interface, leading to the formation of an Ag-Cu eutectic modified layer on the graphite surface. Subsequently, low-temperature joining of the modified graphite to a Cu substrate is achieved via a hot-pressing sintering process using a Ag paste. In the sintered joint, the Ag sintered layer forms sound metallurgical bonds with both the Cu substrate and the graphite-modified layer. When the sintering temperature is 250 °C, the joint exhibits a shear strength of 30 MPa, which is significantly higher than that of a directly brazed joint. This strategy effectively reduces thermal residual stress in the joint during cooling and shifts the failure location from the brittle graphite substrate to the ductile Ag sintered layer, thereby substantially enhancing the mechanical performance.
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iScience
·
2026
·Vol. 29
·期 7
·
IF 4.5
Linqin Xie,Deng Huang,Kai Chen,Bangxuan Zhu,Yangkai Zhao,Jieke Li,Shouyi Wang,Mingliang Wu,Yili Xiang
Chronic diabetic wounds require dressings that combine high liquid absorption, antibacterial activity, and bioactivity to support tissue repair. Here, copper-containing mesoporous bioactive glass (Cu-MBG) was incorporated into polyurethane foam to create a bioactive composite dressing (PU-Cu-MBG). The resulting foam exhibited strong liquid absorption, suitable water vapor transmission, and robust mechanical properties. The Cu-MBG endowed the dressing with antibacterial activity (>99% against Staphylococcus aureus and Escherichia coli ) and promoted the proliferation of human endothelial cells. In vivo , the PU-Cu-MBG dressing enhanced angiogenesis, collagen deposition, and accelerated wound closure compared with commercial dressings in a diabetic skin wound model. These findings demonstrate that bioactive glass-loaded foam dressings can effectively combine physical and biological functions, offering a promising approach for the management of chronic diabetic wounds.
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高影响因子
Small
·
2026
·
IF 11.8
Jiamin Qiu,Yu Liu,Zhenlong Liu,Jiajun Li,Siqi Geng,Jizhen Li,Guofang Zhang,Ziwei Gao
Combustion catalysts commonly improve the burning performance of composite solid propellants by lowering the thermal decomposition temperature of ammonium perchlorate (AP) and increasing AP heat release. However, heat release over a narrow temperature range is also critical for ignition response and regulation of the burning rate. To address this gap, we propose a concentrated heat release strategy for AP catalysis. This strategy is implemented using the Cu-BDC-NH 2 @TpPa heterostructure (Cu-BDC-NH 2 = copper 2-aminoterephthalate; TpPa is formed by Tp, 1,3,5-triformylphloroglucinol, and Pa, p-phenylenediamine). The TpPa layer regulates contact between AP and Cu active sites. DSC results show that Cu-BDC-NH 2 @TpPa-0.20 centers the main AP exothermic peak at 322°C and narrows the heat release range from 60°C for Cu-BDC-NH 2 to 12°C. Electrochemical measurements reveal lower electrochemical polarization and a more sensitive interfacial current response in the redox potential region. Condensed-phase in situ FTIR and TG-DSC-FTIR-MS analyses indicate that the TpPa interface modulates the local NH 4 + /ClO 4 − vibrational environment and gaseous product evolution. DFT calculations suggest that the thermally evolved CuO/C composite interface favors the adsorption and transformation of NH 3 -related intermediates while facilitating the desorption of NO and NO 2 products. This work provides an interface regulation strategy for combustion catalysis in energetic materials.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Xiaoxue Zhang,Ru Jia,Zhen-Feng Huang,Lun Pan,Chengxiang Shi,Xiangwen Zhang,Guidong Yang,Ji-Jun Zou
Ni-doped Cu nanowires catalyst enables Cu sites to activate NO and Ni sites to accelerate water dissociation to supply *H. • In situ tests confirm Ni doping reduces charge transfer resistance, accelerates the Volmer step, and increases *H coverage. • CuNi 10% NWs catalyst has industrial-scale current density (>1000 mA cm −2 ) and 90.35% NH 3 Faradaic efficiency in a flow cell. • CuNi 10% NWs catalyst achieves 82.47% NH 3 Faradaic efficiency in a membrane electrode assembly with excellent stability. The electrocatalytic nitric oxide reduction reaction (NORR) presents a promising method for simultaneously mitigating nitric oxide (NO) pollution and synthesizing ammonia (NH 3 ). However, its practical application is hindered by sluggish kinetics, primarily due to inefficient water dissociation, which results in an inadequate supply of active hydrogen (*H) and thereby limits the hydrogenation of nitrogen-containing intermediates. Herein, we present Ni-doped Cu nanowires as a high-performance electrocatalyst for the NORR. The optimized catalyst with a Ni/(Ni + Cu) molar ratio of 10% (CuNi 10% NWs) delivers an industrial-scale current density exceeding 1000 mA cm −2 in a flow cell, achieving an exceptional Faradaic efficiency (FE) of 90.35% and an NH 3 yield rate of 6.84 mmol h −1 cm −2 (17.28 mmol g cat −1 h −1 ) at −1.0 V vs. reversible hydrogen electrode. Furthermore, in a membrane electrode assembly, the CuNi 10% NWs achieved an NH 3 FE of 82.47% and an NH 3 yield rate of 4.44 mmol h −1 cm −2 (8.88 mmol g cat −1 h −1 ). Remarkably, in situ electrochemical impedance spectroscopy and Tafel slope analyses reveal that Ni doping reduces the interfacial charge transfer resistance of Cu nanowires, accelerates the rate-determining Volmer step of water dissociation, and facilitates the generation and adsorption of *H intermediates. This study opens a new pathway for the resource utilization of industrial waste gas NO and the direct synthesis of NH 3 . Download: Download high-res image (156KB) Download: Download full-size image Ni-doped Cu nanowires catalyst acts as a high-efficiency catalyst for electrocatalytic NO-to-NH 3 conversion, where Cu sites activate NO and Ni sites accelerate water dissociation to enrich active hydrogen species, thus achieving superior catalytic activity for NH 3 synthesis.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jiaoyan Li,Tianyu Li,Kun Sun,Junhao Chang,Peng Zheng,Yajing Zhang,Fangke Wang,Kangjun Wang
EMSI enhances FFA ring-opening hydrogenolysis to 1,2-PeD. • Electron-deficient Cu species and basic sites synergistically activate C–O bonds. • In situ ATR-FTIR reveals furan-ring opening and C 5 intermediate formation. • DFT reveals furan-O adsorption promotes C 5 –O 1 bond polarization and cleavage. Selective hydrogenolysis of furfuryl alcohol (FFA) to 1,2-pentanediol (1,2-PeD) offers a route for biomass valorization. However, catalysts suffer from unclear active-site configurations and insufficient activation of the key C–O bond. To address this, a Cu/MgO catalyst featuring basic sites and electron-deficient Cu active sites at the interface is developed. Compared with Cu/Al 2 O 3 and Cu/CeO 2 , Cu/MgO achieves 97% FFA conversion and 45% 1,2-PeD selectivity under continuous-flow conditions at 140 °C and 6 MPa H 2 . In situ XPS, in situ ATR-FTIR, and DFT calculations indicate that electronic metal-support interaction (EMSI) at the Cu–MgO interface induces interfacial charge redistribution and favors ring-opening hydrogenolysis. The resulting electron-deficient Cu species and MgO-derived basic sites cooperatively promote FFA adsorption through the furan-ring oxygen, C–O bond activation, C 5 carbonyl intermediate formation, and hydrogenation to 1,2-PeD. This work addresses the mechanistic gap between EMSI and the ring-opening hydrogenolysis of FFA over Cu–MgO catalysts. Cu–MgO interfacial sites, where EMSI generates electron-deficient Cu species while MgO provides basic sites, enable selective ring-opening hydrogenolysis of furfuryl alcohol to 1,2-pentanediol. Preferential adsorption through the furan-ring O atom positions the C 5 –O 1 bond near the Cu–MgO interface, promoting interfacial polarization, selective C–O bond cleavage, C 5 carbonyl intermediate formation, and subsequent hydrogenation to 1,2-pentanediol, as supported by in situ XPS, in situ ATR-FTIR, and DFT calculations. Download: Download high-res image (331KB) Download: Download full-size image
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Shihao Bai,Weijiao Jiang,Jingke Pei,Zhihui Xie,Jian Kang,Ming Xiang,Yue Zhang,Lu Li
High-permeance nanofiltration (NF) membranes with efficient sulfate separation are highly desirable for water purification and ion separation, but their performance is often constrained by the insufficient control of polyamide (PA) formation during interfacial polymerization. Herein, a copper–ionic liquid complex interlayer was constructed in situ on a polysulfone substrate through a coordination-assisted assembly strategy to regulate PA formation and improve NF separation performance. The introduction of the Cu-IL interlayer altered the interfacial polymerization environment, leading to the formation of a thinner and smoother PA selective layer with a modified surface elemental composition. Compared with the pristine NF membrane, the optimized NF/Cu-IL-2 membrane exhibited a reduced PA-layer thickness from 114 to 75 nm, a decreased surface roughness from 9.1 to 7.1 nm, and a lower O/N ratio from 1.22 to 1.13. Benefiting from the reduced transport resistance and improved water affinity, NF/Cu-IL-2 achieved a water permeance of 15.8 L m -2 h -1 bar -1 , which was 85% higher than that of the pristine NF membrane, while maintaining a Na 2 SO 4 rejection above 97%. Notably, the effect of Cu-IL loading was non-monotonic, and further increasing the interlayer loading did not continuously reduce the PA-layer thickness or improve water permeance, indicating the existence of an appropriate Cu-IL loading range. Moreover, NF/Cu-IL-2 maintained relatively stable water permeance and Na 2 SO 4 rejection during a continuous 144 h filtration test under the tested chlorine-free conditions. These results demonstrate that coordination-assisted Cu-IL interlayer engineering is an effective strategy for improving water transport while maintaining sulfate rejection under the investigated single-salt conditions.
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