Molecular Catalysis
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2025
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IF 4.9
Yongli Chang,Weiling Liu,Yang Chen,Yong Zhang,Ruoyu Li,Xiaoyang Xu,Yu Tang,Lizhi Wu,Huibo Zhao,Li Tan
Tuning metal-support interactions in catalysts represents a promising strategy for optimizing the catalytic activity of CO 2 hydrogenation. Here, CuZnZr ternary catalysts with varied interfacial structures were fabricated by altering the metal loading sequence to elucidate the interactions between different counterparts. Compared to reference catalysts with different interfaces (Cu-ZnZr, Zn-CuZr and Zr-CuZn), CuZnZr synthesized via the coprecipitation method (CZZ) displays the highest catalytic performance, achieving a CO 2 conversion rate of 13.3 %, methanol selectivity of 71.3 %, and a STY of 12.2 mmol MeOH ·g cat -1 ·h -1 under optimal conditions. Extensive characterization results indicate that this exceptional activity originates from the synergistic optimization of both structure and reaction mechanism, driven by the interface confinement effect (ICE) enabled by abundant interfacial sites. Specifically, the surface of CZZ shows high density of highly dispersed Cu 0 nanoparticles and rich oxygen vacancy sites, which is beneficial to the activation of H 2 and the adsorption of CO 2 . In-situ DRIFTS further revealed that, compared to reference catalysts, CO 2 hydrogenation on CZZ follows both the HCOO* and COOH* pathways, leading to a substantial improvement in overall catalytic activity. In summary, this study provides a deeper understanding of the ICE and their impacts on catalytic performance, offering a valuable theoretical insight for the design of high-performance catalysts in future research.
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CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 22
·32025-32032
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IF 4.527
ChanQin Duan,Kanghui Tian,Xinglong Li,Dan Wang,Hongyu Sun,Runguo Zheng,Zhiyuan Wang,Yanguo Liu
High-entropy oxides (HEOs) with numerous functional features such as high structure stability and superionic conductivity are considered as promising candidates of electrode materials for lithium-ion batteries (LIBs). In this study, a series of single-phase spinel-structured high-entropy oxides (FeCoNiCrMnXLi) 3 O 4 (X = Cu, Mg, Zn) consisted of seven metal elements at equal molar ratio were synthesized by solid phase method. In-situ high-temperature XRD technique was used to investigate the structure evolution of (FeCoNiCrMnZnLi) 3 O 4 and a single-phase HEO was acquired at 900 °C. As the anode of LIBs, all the HEOs (FeCoNiCrMnXLi) 3 O 4 display excellent cyclic stability and rate capability owe to the expedite three-dimensional Li + transport pathways of spinel structure, the entropy-dominated phase stabilization effect together with the abundant oxygen vacancies introduced by the incorporation of Li + . In comparison, the (FeCoNiCrMnZnLi) 3 O 4 anode containing electrochemical active Zn with tetrahedral coordination structure shows better electrochemical lithium storage performances among the three samples. The ex-situ XRD of (FeCoNiCrMnZnLi) 3 O 4 during the discharge/charge procedure shows an amorphous state structure after the first lithiation process and it retained for the de-lithiation process. This work provides a new strategy to design high-entropy energy-storage material and pave the way for understanding the storage mechanism of HEOs.
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TETRAHEDRON LETTERS
·
2018
·Vol. 59
·期 51
·4458-4461
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IF 2.125
Zhengjiang Fu,Yongqing Jiang,Ligao Jiang,Zhaojie Li,Shengmei Guo,Hu Cai
A simple and practical Cu-catalyzed decarboxylative iodination has been well established under aerobic condition, which provides a useful method to synthesize aryl iodides in moderate to good yields with the use of (hetero)aryl carboxylic acids and NaI as starting materials. Thiabendazole has been prepared via a three-step procedure to show synthetic practicability of the protocol.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Lingchu Huang,Sitong Feng,Weijia Li,Huaiyuan Sun,Jianyu Zhang,Qi Lu,Tong Wang,Xiaoyong Sun,Rui Han,Xishuang Liang,Fangmeng Liu,Peng Sun,Fengmin Liu,Bin Wu,Geyu Lu
In this work, nitrogen doped carbon fiber loaded copper (Cu/CF-N) sensing electrode and Nafion proton conductor are used to fabricate fuel cell type gas sensors that realize fast response/recovery for SO 2 detection at room temperature . This is the first time that this type of sensor has been used to detect SO 2 . We investigated the effect of Cu content on sensors’ performance, and found that the Cu (20 wt%)/CF based sensor exhibited the highest response. This can be attributed to the optimal Cu content, which exposes the most active sites. Moreover, nitrogen was doped into electrode material to further improve the performance. Nitrogen atoms enhance the conductivity of the material and its ability to adsorb SO 2 . These are confirmed by the complex impedance measurement and TPD analysis. The upgraded Cu/CF-N fuel cell type gas sensor showed a response of − 435.6 nA to 50 ppm SO 2 and a low detection limit of 500 ppb. Significantly, the Cu/CF-N sensor demonstrated short response time (44 s) and recovery time (87 s) at room temperature. Furthermore, with the advantages of no power consumption , excellent selectivity and good repeatability, the fuel cell type gas sensors have broad prospects in the field of room temperature gas detection.
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MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Faqiang Shi,Limeng Liu,Zhaoping Hou,Guihong Geng,Yujin Wang
Tantalum carbide ceramics with an overall composition of TaC 0.6 were prepared by hot pressing at 1700 °C for 1 h under 30 MPa pressure with fcc TaC and bcc Ta powder as starting materials. Effects of adding 0–30 mol% Cu on densification, phase formation, microstructural evolution , mechanical properties and electrical conductivity of the obtained composite ceramics were investigated. Full density could be reached at 20 mol% Cu addition and above. Reactions between TaC and Ta resulted in the final phases of hexagonal Ta 2 C and rhombohedral ζ-Ta 4 C 3-x . Plate-shaped ζ laminate grew in both TaC and Ta 2 C and consequently had their sizes confined by the parental grains. Addition of 20–30 mol% Cu could significantly grow the intermediate Ta 2 C grains, hence controlling length of the ζ laminates precipitated in them to form bimodal microstructures consisting of large grains. The 20 mol% Cu composition had a better flexural strength (706 ± 46 MPa) and fracture toughness (9.2 ± 1.7 MPa m 1/2 ). Electrical resistivity at room temperature of the composites decreased with Cu content from 1.03 μΩ m at 0 mol% addition to 0.12 μΩ m at 30 mol% Cu.
研究领域:
材料科学
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陶瓷学
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复合材料
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粉末冶金
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结构陶瓷
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物理化学
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固态化学
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Journal of Energy Chemistry
·
2026
·
IF 14.9
Fei-Fei Lu,Ru-Yi Hou,Qi Ma,Jia-Hong Li,Chang-Jiu Li,Venkataraman Thangadurai,Cheng-Xin Li
Metal-supported solid oxide fuel cells (MS-SOFCs) offer superior mechanical strength and fast start-up, but the mismatch between metal and cathode (oxygen electrode) components poses challenges for developing compatible, high-activity cathodes at intermediate-to-low temperatures (IL-T). Recently, cobalt-free cathode materials have attracted significant attention, especially donor-doped SrFeO 3− δ . To further improve their redox performance at IL-T, density functional theory (DFT) calculations were employed in this study to design Cu-doped SrFe 0.9 Nb 0.1 O 3− δ cathodes, revealing the correlation between Cu-doping and lattice distortion. DFT results indicate that moderate Cu-doping at the B site promotes defect formation and effectively reduces the oxygen vacancy formation energy of the parent SrFe 0.9 Nb 0.1 O 3− δ , while excessive Cu-doping limits the oxygen vacancy formation. Guided by theoretical insights, SrFe 0.9− x Nb 0.1 Cu x O 3− δ (SFNC x , x = 0, 0.05, 0.10, 0.15, and 0.20) materials were synthesized, and experimental results further support the DFT conclusions. The optimized SFNC10 composition exhibited the highest oxygen vacancy concentration and achieved a polarization resistance of 0.15 Ω cm 2 at 650 °C. Moreover, this work provides the first demonstration of the SFNC10 cathode applied in an MS-SOFC, with the configuration of FeCr||NiO-GDC||CoGDC||SFNC10, operating stably at 200 mA cm −2 for over 60 h and delivering a peak power density of 728.9 mW cm −2 at 700 °C.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Tianrong Han,Qiwen Su,Zhaoyong Jin,Shuai Ding,Yilong Dong,Kun Qi,Lin Liu,Jinchang Fan,Tingyan Huo,Kaiwen Hou,Xiaoqiang Cui
Electrocatalytic CO 2 reduction to multi‑carbon products offers a sustainable route to fuels and chemicals, yet suffers from sluggish C C coupling and competing hydrogen evolution. Here, we report a rationally engineered Cu 3 N/Cu@C heterostructure catalyst that delivers markedly enhanced CO 2 electroreduction performance. The optimized catalyst achieves a 65.3% Faradaic efficiency toward multi‑carbon products and a half-cell energy efficiency of 35.3% at −1.1 V versus reversible hydrogen electrode. Combined in situ attenuated total reflectance surface enhanced infrared absorption spectroscopy and density functional theory calculations reveal that interfacial charge transfer at the Cu 3 N/Cu junction modulates the electronic structure of Cu sites, elevates local pH, strengthens CO 2 adsorption and activation, and suppresses hydrogen evolution. Importantly, the tailored interface facilitates asymmetric C C coupling between *CO and *COH intermediates, stabilizing the key *OCCOH species and accelerating multi‑carbon products formation. This work underscores heterointerface engineering as a powerful strategy to control reaction microenvironments and C C coupling pathways, guiding the development of high-performance copper-based CO 2 reduction reaction catalysts.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiao–Dan Liu,Xiaomin Kang,En-Peng Du,Min Jiang,Rui–Di Sun,Yi–Min Ding,Jie–Shu Qian,Li Zhou
The electrocatalytic formaldehyde oxidation reaction (FOR) offers a unique pathway for simultaneous hydrogen and formate generation at the anode, presenting an energy–efficient alternative to the oxygen evolution reaction for hydrogen production. However, the inherent activity and stability of Cu–based electrocatalysts for FOR are still not satisfactory for practical application, primarily due to the facile oxidation of active Cu 0 sites to inactive Cu + /Cu 2+ species during operation. Herein, we construct a Cu/Ni heterojunction electrode via facile electrodeposition. Experimental and spectroscopic characterizations confirm interfacial electron transfer from Ni to Cu, creating an electron–rich Cu surface that resists oxidative deactivation. This electronic modulation results in exceptional FOR performance, achieving 100 mA·cm –2 at 0.1 V vs. RHE and remarkable stability over 100 h. In situ measurements further reveal that the optimized electronic structure of the Cu/Ni heterojunction electrode enhances the adsorption and conversion of the key H 2 C(OH)O intermediate. A bipolar H 2 production device incorporating a Cu/Ni anode achieves 100 mA·cm –2 at a cell voltage of 0.14 V. This work demonstrates the promise of interfacial electronic engineering in developing efficient catalysts for energy–saving hydrogen production.
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FUEL
·
2026
·
IF 7.8
RuoKun Jia,TianXiang Li,PengPeng Wang,DuMin Li,JiaHui Chen,XiaoHang Yang,QingXiao Zhao,Xin Cheng,LingYun Zhang,Xiaoxi Liu
A Cu: MoO 3 /g-C 3 N 4 binary heterojunction photocatalyst was synthesized via a hydrothermal method, achieving a light response that covers nearly the entire visible region. The material shows a strong, broad absorption band from 400 to 700 nm, significantly improving its visible-light harvesting and utilization efficiency. Optimization of the g-C 3 N 4 , Cu, and Mo molar ratios further enhanced the catalyst’s redox performance under visible-light irradiation. Through combined XPS, UV–vis, and in situ DRIFTS characterizations, it was verified that the Cu: MoO 3 /g-C 3 N 4 photocatalyst possesses a wide visible-light absorption range and effectively transforms absorbed long-wavelength photons into photogenerated electron-hole pairs, thereby facilitating the separation and transfer of charge carriers. Due to the simultaneous enhancement of broad-spectrum light capture and charge separation/transfer efficiency, this catalyst demonstrates excellent catalytic activity in visible light-driven CO 2 conversion, with a maximum methanol production rate of 102.52 μmol·g −1 ·h −1 . This work verifies the feasibility of efficient visible light-driven CO 2 conversion and provides a viable design approach and reference for constructing multi-metal-based photocatalysts with full visible light response.
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MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Ke Jing,Bingbing Shang,Meng Zhou,Yi Zhang,Chunhe Chu,Xiaohui Zhang,Xinxin Ma,Baohong Tian,Jin Zou
Electrode materials typically suffer from an inherent trade-off between arc erosion resistance and electrical conductivity. In this work, Cu-10W composites containing of 0, 0.1, 0.3, and 0.5 wt% graphene (Gr) was fabricated via near-net-shape hot isostatic pressing (HIP), and their microstructures and properties were systematically investigated. Among these composites, the Cu-10W-0.1Gr composite exhibited the most balanced performance, achieving a relative density of 98.57%, tensile strength of 317 MPa, elongation of 22.2%, and electrical conductivity of 87.6%IACS. Microstructural analysis revealed that the mechanical and electrical enhancements mainly originated from the dispersion strengthening induced by nano-sized W particles dispersed within the Cu matrix, combined with the optimization of the conductive network by Gr located at grain boundaries. Benefiting from the high electrical conductivity and low work function of Gr, under a 30 V DC and 35 A test condition, the addition of a 0.5wt.%Gr reduced mass loss and erosion rate by up to 24.0%, decreased average arc energy by up to 47.9%, effectively suppressed welding force, and maintained stable contact resistance. This work mitigates the longstanding strength-conductivity dilemma in Cu-based electrode materials, and provides a viable design strategy for high-performance electrical contact composites.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Jinying Shi,Zhendong He,Yifan Xu,Wen Chen
Ethylene is a crucial gaseous phytohormone that regulates diverse aspects of plant growth and development. In Arabidopsis thaliana , perception of ethylene is mediated primarily by ETHYLENE RESPONSE 1 (ETR1), a prototypic membrane protein that couples ligand sensing to signal transduction through a transmembrane copper cofactor-dependent ethylene-binding site and a cytoplasmic histidine kinase domain. Previous work established that ETR1 binds copper and forms covalent homodimers, but the functional significance of its dimeric architecture in signal transduction has remained elusive. In this study, we expressed and purified full-length ETR1 from Pichia pastoris, enabling the systematic dissection of its oligomeric state, copper redox chemistry, and ligand binding effects. Using an in vitro luminescent kinase assay, we demonstrate that the Cu(I)-ethylene complex strongly suppresses ETR1 autophosphorylation, but only when the receptor is in its disulfide-linked dimer form. Monomeric ETR1 generated by reductive cleavage retained basal kinase activity yet was insensitive to ethylene. Furthermore, the ethylene antagonists Ag + and 1-MCP reversed the ligand-induced suppression. Mutational analysis revealed that the H353Q variant lacked kinase activity, while the C65S/H69A double mutant retained basal activity but was resistant to ethylene-induced inhibition, implicating both the catalytic histidine residue and the copper-binding site in the regulatory mechanism. Together, these findings establish that ETR1 functions as a dimer-dependent ethylene sensor, in which covalent dimerization is essential for allosteric coupling between the ligand-binding and kinase domains. This work thus provides a definitive biochemical model for ethylene perception and offers a robust platform for future structural and mechanistic studies of plant membrane-receptor signaling.
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PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
Xie Wangjing,Tian Tingting,Yue Shengnan,Gu Hualong,Shi Ningning,Chen Dechao,Praveen C. S.,Huang Xing
The electrocatalytic CO 2 reduction reaction (e-CO 2 RR) on Cu-based catalysts has been extensively studied; however, achieving high selectivity for C 2+ products and long-term durability remains challenging. Here, we introduce a straightforward approach that enhances both C 2 H 4 selectivity and catalyst durability by incorporating a nitrogen-rich Schiff-base Network (SNW), leveraging a synergistic interaction between Cu and SNW. Notably, Cu cubes with SNW, predominantly exposing the Cu(200) facet, achieve a Faradaic Efficiency (FE) of 71.2% for C 2 H 4 at a current density of 265 mA cm −2 , which not only exceeds tetrahedral and spherical Cu with or without SNW, but also ranks competitively among state‑of‑the‑art Cu-based catalysts reported to date. Theoretical calculations suggest that the presence of SNW on Cu facilitates the *CO-*CHO coupling and/or the C 2 H 4 desorption, thereby enhancing C 2 H 4 formation. Furthermore, the Cu(200)-SNW surface exhibits optimized Gibbs free energies for the reaction steps compared to bare Cu and other SNW-modified Cu surfaces, which rationalizes the experimental observations. In situ electron microscopy further suggests that SNW confers durability by stabilizing Cu facets and preventing corrosion and dissolution under reaction conditions.
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