INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 34
·18159-18168
·
IF 3.9
Ren Xuping,Zhao Zijiang,Long Yanhui,Zhang Wenjun,Wang Jun,Zhang Hao
Developing efficient catalysts for
CO 2 hydrogenation
to methanol remains a challenge due to the inherent trade-off between
activity, selectivity, and cost. Herein, a series of metal-promoted
Cu catalysts (Zr, Zn, Ga) were synthesized via a ligand-modulated
oxalate coprecipitation strategy using malachite-derived CuO as the
precursor, enabling a low-cost and sustainable catalyst design. Among
these, the ZrO 2 /Cu catalyst (Zr/Cu = 14:86) exhibits the
optimal performance, delivering a CO 2 conversion of 13%
and a methanol space-time yield (STY) of 280.1 g MeOH ·kg cat –1 ·h –1 at 280 ° C
and 3.0 MPa, together with excellent long-term stability. Characterization
results suggest that highly dispersed Zr species effectively suppress
Cu particle agglomeration while generating abundant surface oxygen
vacancies (O V , 43.5%). Mechanistic studies indicate that
Zr incorporation induces strong electronic metal–support interactions
(EMSI), leading to the formation of electron-rich Cu 0 /Cu + sites. These sites act cooperatively with O V ,
where the former facilitates H 2 dissociation and the latter
promotes CO 2 adsorption and activation. Such synergistic
effects favor the formate-mediated pathway while suppressing the competing
reverse water–gas shift reaction. This work not only demonstrates
a high-performance catalyst derived from natural minerals but also
provides insights into the atomic-level synergy between electron-rich
metal sites and surface defects, offering a viable strategy for the
rational design of efficient catalysts for CO 2 hydrogenation.
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NANO
·
2026
·
IF 1.3
Zhida Yang,Wenkai Wang,Binbin Gao,Tianzi Xu,Dongxue Zhou,Rongjie Li,Wei Liu,Honglu Liang,Guangsheng Dong,Hongzhi Yuan,Wenjun Dong,Honglin Chen
The Cu@Ag core-shell particles can be employed as conductive phase in conductor paste. Ag shell is designed to protect Cu core from oxidation. To obtain thin, dense and uniform Ag shell on Cu core, a novel electroless Ag plating process for Ag coating is developed. In the process, acacia gum (AG) acts as surfactant and dispersant, manipulating Ag deposition on Cu slowly and accurately. Benefit from the reduction potential difference between Ag and Cu, a thin reduced Ag shell is plated on Cu core with layer growth mode firstly. Then, inhomogeneous surface energy of Ag shell commands its following growth with an island mode. Finally, these Ag islands grow to contact and bond together, resulting in an uniform and dense Ag shell for Cu@Ag. After optimization, the Cu@Ag particle shows excellent oxidation resistant. A mass increase of only 0.5% is observed in it at 300°C. Meanwhile, the Cu@Ag with regular structure also presents remarkable volume conductivity. Over all, the spectacular performance of prepared Cu@Ag powder indicates its promising application in conductive paste.
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JOURNAL OF ORGANIC CHEMISTRY
·
2026
·
IF 3.3
Lu Wang,Yulu Du,Yanrong Zhu,Bing Zhang,Wenhui Wang,Ying Fu,Zhengyin Du
A palladium-catalyzed tandem Heck cyclization of N-(2-iodoaryl)acrylamides with N-methylanilines and ClCF2COONa has been developed for the synthesis of carbamoyl-substituted oxindoles bearing an all-carbon quaternary stereocenter, wherein difluorocarbene serves as the carbonyl source. This method operates under mild conditions, exhibits a broad substrate scope, and features operationally simple and safe procedures. Moreover, it expands the synthetic utility of difluorocarbene-involved domino Heck cyclizations and enables the efficient construction of diverse amide-functionalized molecular architectures containing an all-carbon quaternary center.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jinghao Lu,Lili Yang,Chuanhui Zhang,Haijie Cao,Xingyun Li,Lianying Zhang,Chang Long,Xiu Song Zhao
Realizing the evolution of Cu valence state in the electrocatalytic CO 2 reduction reaction (eCO 2 RR) is crucial to maintain active sites, optimize reaction conditions and product selectivity and understand reaction mechanism and kinetics. In this context, we investigated the dynamic transition of Cu(II), Cu(I) and Cu(0) under the eCO 2 RR conditions and impact of such transition on reaction intermediate species and product selectivity. In situ surface-enhanced Raman spectroscopy and attenuated total reflectance-surface-enhanced infrared absorption spectroscopy results coupled with quantitative data collected from a flow cell show that Cu (I) species contributes to CO 2 activation, CO adsorption, and subsequent C–C coupling processes, while the initial adsorption of Cu (0) in CO 2 playing a crucial role. These findings clarify how the valance of Cu changes with applied cathodic potential and reaction time, thus offering guidelines on optimization of operating conditions during CO 2 electrolysis to maintain the active sites responsible for forming desirable products. These new understandings lay a solid ground for purposely designing Cu-based catalysts for improved performance in CO 2 electrolysis, significantly advancing our knowledge on the behavior of Cu-based electrocatalysts in CO 2 electrolysis.
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ACS Omega
·
2025
·
IF 4.3
Tai Zhou,Xue Liu,Zhimin Wu,Riley Lyu,Caizhi Peng,Hongyi Zhang,Yajing Xia
Background: Skin wound healing is a common clinical challenge, facing multiple obstacles including delayed healing, local hypoxia, and bacterial infection, which may lead to prolonged nonhealing or wound infection. Traditional therapeutic strategies mostly intervene in single factors, making it difficult to achieve synergistic effects. Therefore, developing an innovative approach to simultaneously address multiple issues is of great significance. Objective: This study aims to develop a multifunctional hydrogel patch (Cu–Fe3O4-loaded HAMA, CFH) by integrating three core functions of promoting healing, supplying oxygen, and antibacterial activity, achieving a “one-for-three” therapeutic effect to provide a more comprehensive solution for wound repair. Methods: Cu–Fe3O4 nanoclusters (NCs) were synthesized via a hot solvent method, and CFH hydrogel patches were constructed using molds. In vitro experiments were performed to verify their biosafety, antibacterial properties, and nanozyme activity. A mouse full-thickness skin defect model was established to validate the wound-healing effect of CFH hydrogel patches in vivo. Results: Cu–Fe3O4 NCs were successfully synthesized, exhibiting good biocompatibility and significantly promoting the proliferation and migration of human skin fibroblasts (HSFs). Meanwhile, the material showed excellent nanozyme activity, effectively catalyzing the decomposition of hydrogen peroxide and glutathione to remarkably improve local oxygen supply in wounds. Antibacterial experiments confirmed significant inhibitory effects against MRSA and Escherichia coli. In vivo experiments further demonstrated that CFH hydrogel patches adhered well to wounds, enabling rapid, efficient, and aseptic wound healing within 14 days. Conclusions: This study successfully developed a multifunctional CFH hydrogel patch based on Cu–Fe3O4 NCs, integrating three functions of promoting cell proliferation, improving oxygen supply, and broad-spectrum antibacterial activity. It provides a safe and efficient novel therapeutic strategy for clinical wound repair, holding important clinical application value.
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Nature Communications
·
2026
·
IF 18.1
Qingqing Zhang,Cong Liu,Chang Xu,Dingnan Huang,Cheng Xie,Zhandong Wang,Xiao-Ming Cao,Jinlong Zhang,Juying Lei,Ziwei Ye,Lingzhi Wang
Upgrading light alkanes to value-added olefins is a long-standing challenge, owing to the high stability of C–H bonds and the tendency for overoxidation at elevated temperatures. Here, we introduce a light-driven strategy for ethane dehydrogenation using Cu-doped TiO 2 , in which atomically dispersed Cu coordinated to bridging oxygen (O br–Cu ) creates well-defined [Cu–O] ensembles that orchestrate site-specific, stepwise C–H activation. Photogenerated holes localize at O br–Cu sites to initiate the first C–H cleavage, while adjacent Cu centers mediate β–H elimination and H 2 evolution. In contrast, minor β–H activation at O br–Ti sites generates *H species that cannot desorb due to a prohibitive coupling barrier with *H on O br–Cu , leading to Cu reduction and progressive deactivation. Co-feeding CO 2 restores the active Cu coordination environment and suppresses this deactivation process without perturbing the primary reaction pathway. This cooperative design achieves a C 2 H 4 production rate of 21.1 mmol g −1 h −1 with nearly stoichiometric H 2 evolution and an apparent quantum efficiency of 6.1% under 365 nm irradiation. These findings establish a site-defined, hydrogen-conserving route for photocatalytic alkane upgrading, offering a general blueprint for selective C–H bond transformations with long-term stability. Converting light alkanes into useful olefins is hard because strong bonds and heat drive overoxidation. This study uses a copper-doped titanium dioxide photocatalyst to steer bond breaking, yielding ethylene and hydrogen.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2026
·Vol. 27
·期 5
·2486
·
IF 5.6
Liming Shi,Yuheng Liao,Zeng Hong,Jiancheng Ruan,Shaodong Zhou,Chen Wu,Chao Qian
N,N-Dimethyl-1,3-propanediamine (DMAPA) is an important aliphatic diamine widely used in fine chemical manufacturing. Its industrial production traditionally relies on Raney nickel catalysts, which suffer from pyrophoric hazards and limited selectivity due to imine condensation side reactions. To address these challenges, we report an Al2O3-supported Ni-Cu alloy catalyst as an efficient alternative for the selective hydrogenation of N,N-dimethylaminopropionitrile (DMAPN). The optimized Ni30Cu5/Al2O3catalyst achieves complete DMAPN conversion and over 90% DMAPA selectivity under industrially relevant conditions (120 °C, 2.5 MPa H2). X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy analyses confirm the formation of substitutional Ni-Cu alloy nanoparticles, where Cu incorporation induces both geometric isolation of Ni ensembles and electronic modulation of surface active sites, thereby suppressing condensation-derived by-products. In addition, an NH3/ethanol-assisted process further improves selectivity while reducing autogenous operating pressure. Overall, this work demonstrates a safe and highly selective catalytic system for primary diamine synthesis, providing a practical alternative to conventional Raney Ni-based processes.
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JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Zhi-Xin Li,Hui-Jie Cheng,Yi-Han Zhang,Cong-Jian Pan,Wei-Wei Yan,Wen-Long Mo,Xiao-Qin Yang,Cai-Xia Ju,Xiao-Yu Zhang,Zhi-Hao Ma,Xian-Yong Wei,Sheng Li
Crystallinity engineering of oxide supports has emerged as a powerful strategy to enhance the performance of supported catalysts, yet its application in complex oxides like lanthanum oxycarbonate (La 2 O 2 CO 3 ) remains underexplored. Here, we demonstrated that precise control of La 2 O 2 CO 3 crystallinity via calcination temperature tuning significantly improved the reverse water-gas shift (RWGS) reaction performance of Cu-based catalysts. CuLa500 catalyst, prepared at 500 °C, exhibited superior activity and stability compared to its high-crystallinity counterpart (CuLa800, 800 °C), achieving a CO 2 conversion of 54.4% and near-unity CO selectivity (>99.9%) at 600 °C under high space velocity conditions. Systematic characterization revealed that reduced crystallinity strengthens Cu-support interactions, optimizing CO 2 adsorption while enhancing structural robustness. This work not only establishes a scalable method for RWGS catalyst optimization but also provides mechanistic insights into the role of crystallinity in complex oxide-supported systems, offering a blueprint for advancing multiphase catalysis in energy-related reactions.
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Advanced Materials Interfaces
·
2018
·Vol. 6
·期 2
·1801200
·
IF 4.834
Yutian Wang,Hanjun Hu,Yufan Sun,Yang Tang,Liming Dai,Qing Hu,Adrian Fisher,Xiao Jin Yang
Nanostructure and crystallinity of transition metals play an important role in catalyzing carbon dioxide electroreduction (CO 2 ER) where Cu is a typical electrocatalyst with a wide variety of products and Pb has a high overpotential for H 2 evolution and is selective toward formic acid. In this study, 3D hierarchical nanostructures of Cu–Pb catalyst are prepared by a two-step electrodepositing–annealing–electroreduction approach (EAE). Cu nanowires (Cu NWs) of 200–400 nm diameter are built on the surface of commercial nickel foam substrates through an EAE step. Then, Pb nanoparticles with diameter of 5–10 nm are uniformly created on the surface of Cu NWs by a second EAE step. The nanostructural Cu–Pb electrodes catalyze CO 2 ER at a current density of −9.35 mA cm −2 (at −0.93 V vs reversible hydrogen electrode (RHE)). The H 2 evolution is suppressed by 35.6% and CO and HCOOH are enhanced by 29.6% and 9.2%, respectively, as compared with Cu NWs. The protocol proposed in this study provides a simple and straightforward approach for preparing high-performance, hierarchical nanostructures of Cu–Pb bimetal catalyst for CO 2 ER.
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ACS Nano
·
2026
·
IF 16
Huafeng Fu,Shiteng Long,Jia Hu,Jiehua Li,Hansong Xue,Yu’an Chen,Fusheng Pan
To address the challenges of high hydrogen release temperatures, sluggish kinetics, and inadequate cycling performance of magnesium hydride (MgH2), we developed the niobium-based bimetallic compound catalyst CuNb2O6 with excellent catalytic performance. It was found that the MgH2/CuNb2O6 composite material achieved 4.28 wt % hydrogen uptake within 10 min at 100 °C, and even at a lower temperature of 50 °C, it has 2 wt % hydrogen absorption capacity within 60 min, showing excellent hydrogen absorption performance. For hydrogen desorption, the MgH2/CuNb2O6 composite material demonstrated exceptional midtemperature hydrogen release kinetics, with 4.65 wt % hydrogen released within 20 min at 225 °C. The apparent activation energy for hydrogen release of MgH2/CuNb2O6 was determined to be 50.95 kJ/mol, which was approximately 66.4% less than that of ball-milled magnesium hydride. Cyclic testing further confirmed the stability of the MgH2/CuNb2O6 composite, with its hydrogen storage capacity stabilizing at 5.21 wt % after 50 cycles. Catalytic mechanism studies revealed that the MgH2/CuNb2O6 composite undergoes in situ reconstruction of multiple-phase catalytically active species, which effectively improved the hydrogen storage performance of MgH2. This work innovatively constructed a representative Mg2Cu@NbO2 heterojunction, and the results showed that hydrogen molecules were significantly activated at the interface, demonstrating the synergistic catalytic effect between the Cu and Nb species. This study provides a possible approach for designing high-efficiency catalysts for magnesium-based hydrogen storage materials.
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CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Peng Chen,Sanyuan Hu,Ting Zhou,Heping Li,Youwei Yan
Cu/TiN hybrid nanofibers were successfully fabricated by applying nitridation procedure to CuO/TiO 2 nanofibers. Through modifying the nitridation temperature, the electrical conductivity of Cu/TiN nanofibers was tunable, which could achieve a high value of 320 S/cm-approximately three times that of TiN nanofibers. The oxidation resistance property of the resulting Cu/TiN nanofibers was assessed. With the excellent chemical stability of TiN composition, hybrid Cu/TiN nanofibers possessed greatly enhanced thermostability. Moreover, by taking advantage of readily fiber patterning using electrospinning, Cu/TiN nanofiber networks were assembled as transparent electrodes, which reached an optoelectrical achievement of 34.4 Ω/sq at 83.2% transparency. Given its low-cost, enhanced thermostability, together with considerable optoelectrical achievement, Cu/TiN nanofiber is therefore expected to offer a new platform for cost-efficient transparent electrode.
研究领域:
材料科学
·
纳米技术
·
电子学
·
能源材料
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ACS Omega
·
2020
·
IF 2.87
Jiahao Wang,Xianbin Jia,Shiyun Lou,Guihui Li,Shaomin Zhou
There are many studies concentrated on high-temperature performance of SnSe2, but few studies were conducted on low-temperature properties of embedded SnSe2. In this work, a series of SnCuxSe2 (x = 0, 0.01, 0.02, and 0.05) layered structures have been successfully synthesized by a melt quenching, mechanical milling process, and spark plasma sintering (SPS) method. Meanwhile, the thermal and electrical transport properties of all synthesized samples are measured. These results suggest that the embedding of Cu into SnSe2 results in a high carrier concentration (1019/cm3). In addition, the enhancement of defect and interfacial phonon scattering caused by Cu embedding as well as the weak van der Waals force between layers makes a low thermal conductivity (0.81 W/mK) for the SnCu0.01Se2 at 300 K. Moreover, the maximum ZT is acquired up to 0.75 for the SnCu0.01Se2 sample at 300 K, which is about 2 orders of magnitude higher than the pristine sample (0.009). These features indicate that Cu-embedded SnSe2 can be a promising thermoelectric material at gentle temperature.
研究领域:
材料科学
·
热电学
·
固体物理
·
纳米材料
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