Advanced Energy Materials
·
2025
·
IF 26
Ruizhe Yang,Lu Xia,Wulyu Jiang,Yi Cheng,Kaiwen Wang,Tengyu Chen,Fei Li,Xiaoli Zhao,Bin Wang,Yingtang Zhou,F. Pelayo García de Arquer,Ming Huang
Carbon dioxide electroreduction reaction (CO 2 RR) offers a pathway to convert CO 2 into valuable multicarbon products (C 2+ ), potential clean energy, and chemical vectors, using renewable electricity. Copper catalysts are, so far, the most selective in this process, but still face challenges such as high overpotentials and insufficient selectivity and stability when used alone. One strategy to tackle these is the use of Cu-based tandem structures, which incorporate tailored reaction sites to drive a segment of the CO 2 RR reaction, in a more favorable way, within the same electrode. Recent examples have shown how Cu-tandem catalysts can lead to voltage savings and improvements in selectivity. This review analyses various Cu-based tandem catalysts, focusing on alloys, heterostructures (especially highlighting the role of polymer coatings in achieving tandem effects through environmental control), and metal–organic frameworks (MOFs). It covers synthetic strategies to achieve tandem-enabling configurations and their suggested impact on reaction mechanisms and performance improvement toward C 2+ electrosynthesis. The review concludes by offering a roadmap toward the design of more efficient Cu-based tandem electrodes for CO₂RR and beyond.
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Food Analytical Methods
·
2021
·Vol. 14
·期 9
·1927-1935
·
IF 3.366
Li Li,Gu Xuewei,Wang Junli,Chen Zhengbo
Sulfur containing amino acids play an important role in human physiology, and different levels of amino acids in organisms can cause serious health problems. Herein, we have developed a core-shell Cu@Au nanoparticles (Cu@AuNPs)-based powerful colorimetric sensing array for differentiation of containing amino acid. The sensors consist of two different concentrations of iodides (1.5 μM KI and 0.5 μM NaI) as sensor receptors and Cu@AuNPs as signal readout. With the amino acids, iodide can easily get access to the Cu@AuNP surface, inducing a visual color variation (gray→red) of the Cu@AuNP solution by means of changing the Cu@AuNP clusters to separated, spherical-like, and larger ones. While without the target amino acids, various amino acids show differential binding interactions toward Cu@AuNPs via gold-sulfur bonds. So, the transformation is blocked to diverse degrees due to a competition adsorption between amino acids and iodides to the Cu@AuNPs. Consequently, varying levels of Cu@AuNP transformation are relevant with different amino acids and iodides, generating distinct colorimetric reaction modes, which are characteristic for each amino acid and can be quantitatively detected by linear discriminant analysis (LDA). Four target amino acids have been successfully identified at the 20 nM level. Additionally, the sensing system shows outstanding potential for analysis of complex samples.
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
分子诊断
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Advanced Materials Technologies
·
2020
·Vol. 5
·期 8
·2000278
·
IF 5.969
Qun Liu,Bin Tian,Chengsheng Luo,Jing Liang,Wei Wu
Printed flexible heaters (FHs) with excellent heating performance and thermal stability are quite desirable for the development of portable thermotherapy platform. Herein, the facile screen-printing technology is used to fabricate the highly oxidation-resistant Cu @ Ni rose-stem nanowires (RSNWs) - based low-cost scalable FHs. The Cu @ Ni RSNWs possess low sheet resistance of 1.9 Ω sq −1 after low temperature sintering (90 °C). The FHs not only exhibit great oxidation resistance (almost no change at 180 °C for 30 min), but also maintain the great conductivity (Δ R / R 0 < 0.3) even after being exposed to ambient atmosphere for 60 days. Furthermore, the FHs exhibit great heating performance with the saturation temperature of 172.8 °C under 6 V, and can keep stable heating cycles for 5500 s under both parameters of the stepwise-rising voltage from 2 to 6 V and consistent load-on voltage of 6 V. In addition, the heaters array can greatly shorten the time of raising the temperature of the blood bag from 5 to 20 °C. The outstanding heating performance of the FHs provides great chances for portable variable-area flexible heating platform in the field of multiduty thermal management.
研究领域:
材料科学
·
生物医学工程
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Junlei Zhang,Wei Zhao,Shanshan Wu,Renli Yin,Mingshan Zhu
Advanced oxidation processes (AOPs) based on heterogeneous catalytic activated peroxymonosulfate (PMS) have been becoming alternatives to conventional wastewater treatment technologies to directly degrade chemical contaminants. To build dual/multi redox cycles of different metal ions may be an effective means for better PMS activation. Herein, this study designed Mn 3 O 4 /CuBi 2 O 4 with dual redox cycles of Mn(III)/Mn(IV) and Cu(I)/Cu(II) to activate PMS for efficiently decomposing and mineralizing diclofenac sodium (DCF). Under optimal reaction conditions, DCF (50 mg/L) was degraded totally within 10 min, and TOC removal rate reached up to 74.3%. The possible mechanism of PMS activation by Mn 3 O 4 /CuBi 2 O 4 was proposed, wherein dual redox cycles of Mn(III)/Mn(IV) and Cu(I)/Cu(II) on Mn 3 O 4 /CuBi 2 O 4 effectively facilitated PMS activation to generate · O 2 − , 1 O 2 , SO 4 · − and · OH, which was responsible for DCF degradation. Moreover, combined with degraded products detected by high resolution liquid chromatography coupled to mass spectrometry and corresponding toxic assessment results, the possible degradation pathways of DCF were proposed and the relative toxicity of degraded products was evaluated. This work may be useful for developing stronger heterogeneous activators of PMS to construct more efficient AOPs for purifying wastewater.
研究领域:
环境科学
·
化学工程
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MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Ruofan Wang,Yanfu Yan,Xuemeng Zhou,Gangjian Li,Zheng Wu,Shaowu Dai
A novel no-clean flux enabled direct, plating-free soldering of Cu/Al joints using Sn42Bi58 paste. • Organic acid carbon chain length was tailored to regulate flux activity and interfacial reactions. • A synergistic mechanism between organic acids and fluoroborate salts was elucidated. • The medium-chain succinic acid flux achieved optimal joint strength via interfacial solid solution formation. • The study establishes a clear structure-property relationship from molecular design to joint performance. This study addresses the challenge of low-temperature, flux-based direct soldering for copper‑aluminum dissimilar joints, a critical need in advanced thermal management. A series of novel fluxes were synthesized by incorporating dicarboxylic acids with varying carbon chain lengths—malonic, succinic, and adipic acid—into a triethanolamine-fluoroborate matrix, mixed with Sn42Bi58 powder to form corresponding solder pastes (TL-1 to TL-4). Comprehensive characterization, including wettability tests, shear strength measurements, XRD, SEM-EDS, and FIB-TEM analysis, was conducted. Mechanistically, it is revealed that the carbon chain length dictates the critical balance between flux viscosity (steric hindrance) and carboxylate activation capability. The medium-chain succinic acid in TL-3 achieves an optimal “activation-diffusion-reaction” synergy. It acts concertedly with fluoroborates to thoroughly disrupt the stable native oxides (CuO and Al 2 O 3 ) while simultaneously lowering the diffusion energy barrier for Zn 2+ . This specific interfacial modulation entirely suppresses the conventional formation of brittle intermetallic compounds (IMCs) or non-bonded oxide residues. Consequently, TL-3 facilitates the formation of continuous nanoscale Cu 0.95 Zn 0.049 and Al 0.86 Zn 0.14 solid solution layers at the copper and aluminum interfaces, respectively, achieving robust atomic-level metallurgical bonding. Macroscopically, TL-3 exhibits superior performance with a minimum contact angle of 3.2° on Cu, an exceptional shear strength of 125.86 MPa, and an interfacial nanohardness of 0.826 ± 0.068 GPa. The primary scientific contribution of this work lies in elucidating this novel solid-solution-mediated interfacial strengthening mechanism, offering an innovative atomic-scale engineering pathway for the highly reliable, electroplating-free low-temperature soft soldering of Cu/Al heterogeneous structures. Download: Download high-res image (209KB) Download: Download full-size image
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JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Yanan Liu,Jiaying Zhao,Junting Feng,Yufei He,Yiyun Du,Dianqing Li
Environmental benign non-noble NiCu catalysts with well-distributed homogeneous nanoalloy structure was fabricated from layered double hydroxide for semi-hydrogenation of acetylene. Compared with monometallic Ni catalyst, the introduction of Cu enhanced ethene selectivity and decreased the deactivation rate in long-term reaction. Furthermore, to give a thorough understanding on structure dependent performance, conventional impregnation was also used to obtain bimetallic NiCu catalyst for comparison. Interestingly, imp-NiCu/MMO presented the mixture of monometallic Ni, Cu and bimetallic NiCu. Catalytic results indicated that 100% conversion was achieved at 160 °C with improved selectivity (>70%) over NiCu nanoalloy catalyst, while bimetallic NiCu catalyst with mixed structure showed both poor conversion (50%) and selectivity (65%). Enhanced activity was attributed to small particle size (3.2 nm) and high metal dispersion (31.4%). Improved selectivity and anti-coking ability were related to the alloying of Ni with Cu, which was conducive to isolate Ni atoms from one another confirmed by STEM-EDX and transfer electron from Cu to Ni certified by XPS. Additionally, superior performance was also found in semi-hydrogenations of hexyne, phenylacetylene, 1,2-diphenylethyne and ethyl phenylpropiolate over NiCu nanoalloy.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qin Wu,Chi Fan,Ya Wang,Xiaoping Chen,Guimin Wang,Zhengxing Qin,Svetlana Mintova,Junhua Li,Jianjun Chen
The reduction of NO x emission during the cold start period of diesel vehicles requires special attention in accordance with the emission regulations. In this work, the direct incorporation of cerium and copper in SAPO-18 catalyst with AEI type framework structure (CuCe-SAPO-18) resulting in a substantial enhancement of the performance in the low-temperature NH 3 -SCR reaction (<200 ℃). A small amount of cerium (0.13–0.31 wt%) broadened the reaction temperature range of use and increased the hydrothermal stability of the catalyst considerably. The cerium species was introduced in the ion-exchange sites of Cu-SAPO-18 in the form of Ce 3+ ions even with high loading (3.15 wt%). The Ce 3+ ions were found to affect the distribution of silicon and aluminum atom coordination ( 29 Si NMR, 27 Al MAS NMR) in the AEI-type skeleton structure leading to an increase of both the amount of active Cu 2+ species and the acidity of the CuCe-SAPO-18 catalysts that are beneficial for the NH 3 -SCR reaction.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lei Liu,Chunjiang Han,Guofang Ding,Meiying Yu,Yunfei Li,Shengnan Liu,Yunxuan Xie,Jia Liu
Bimetallic CuCo-doped graphene-like carbon nanosheets (CuCo@GCNs) were synthesized via a facile and efficient process using agarose as carbon templates to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation. In this study, CuCo@GCNs/PMS system exhibited excellent TC removal efficiency (0.182 min −1 ), which was unaffected by various water matrices and applicable to a wide pH range (3.44–8.44). Radicals (SO 4 •− , • OH, and O 2 •− ) and non-radical ( 1 O 2 ) pathways collectively contributed to catalytic TC oxidation based on quenching experiments and electron paramagnetic resonance (EPR) analysis. Density functional theory (DFT) calculations revealed that the mechanism of PMS molecules activated on the surface of CuCo@GCNs, in which CoO provided more catalytic sites while Cu 2 O further enhanced electron transfer. Moreover, the synergistic effect of CuCo bimetal could accelerate redox cycles of Cu + /Cu 2+ and Co 2+ /Co 3+ , inducing the generation of abundant oxygen vacancies (O V s), thus enhancing PMS activation performance. Three potential TC degradation pathways were proposed according to fifteen possible intermediates detected by liquid chromatography-mass spectrometry (LC-MS). In brief, this work provides an efficient CuCo@GCNs heterogeneous catalyst and a new insight into PMS activation, which extends the application of bimetallic materials for environmental remediation.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Jun-Qi Hu,Yue-Zhu Li,Song-Yi Liao,Xing-Wen Huang,Yi-Zhao Chen,Xiao-Kang Peng,Yi-Bin Yang,Yong-Gang Min
Currently, the thermal runaway of lithium-ion batteries (LIBs) has become one of its most concerned safety hazards. Therefore, battery cells with high safety and energy density have become the important goal for the development of LIBs. In this work, the ultralight and high thermal conductivity of the Cu@graphene-like thermal film (shortened as Cu@GTF) composite current collector with a sandwich structure was derived from polyimide and prepared by the vacuum evaporation method. Compared with the commercial copper foil, the Cu@GTF showed a smaller areal density of <7.0 mg/cm2 (vs 17.50 mg/cm2 of commercial Cu foil) and a higher thermal conductivity of >550 mm2/s (vs 164 mm2/s of Cu foil). Considering its lighter mass, higher thermal conductivity, and reasonable electrical conductivity, the Cu@GTF as a current collector may become a favorable competitor of the commercial Cu foil to meet people’s needs for high safety, energy, and performance of LIBs.
研究领域:
材料科学
·
电化学
·
电池技术
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xinmeng Wu,Tao Li,Yi Ding,Xinyue Liu,Haiwei Han,Lihua Yu,Junhua Xu,Bin Zuo
In this paper, a series of NbN-Cu composite coatings were prepared using non-equilibrium magnetron sputtering. The composition, microstructure, mechanical properties, chemical stability, and tribological performance of the NbN-Cu coatings in bovine serum albumin (BSA) solution were systematically investigated using EDS, XRD, TEM, nanoindentation, a friction tester, and Raman spectroscopy. The results show that the NbN-Cu composite coatings consist of fcc-NbN, hcp-NbN, and fcc-Cu phases. As the Cu content increases, both the hardness and elastic modulus first increase and then decrease. At a Cu content of 0.89 at.%, the NbN-Cu composite coatings exhibit the highest hardness and elastic modulus, reaching 24.5 GPa and 312.6 GPa, respectively. Additionally, at the same Cu content, the NbN-Cu composite coatings demonstrate the best chemical stability, with the lowest ion release and the highest corrosion resistance, reflected by a corrosion current of 8.2 × 10 −7 A/cm 2 and a corrosion potential of −0.15 V. During friction in bovine serum protein (BSA) solution, the friction coefficient initially decreases and then stabilizes, with a minimum value of 0.155. The wear rate also first decreases and then increases, reaching a minimum of 3.75 × 10 −8 mm 3 N −1 mm −1 at a Cu content of 0.89 at.%. The tribological mechanisms of the NbN-Cu/BSA system were explored from the perspectives of lubrication state, adsorption behavior, and tribochemical products. The findings indicate that: (1) the NbN-Cu/BSA system operates under mixed lubrication conditions. (2) the introduction of Cu facilitates the formation of a robust physical and chemical adsorption layer on the surface of the NbN-Cu composite coatings, effectively separating the contact surfaces. (3) under the friction-induced catalytic action of Cu within the coatings, BSA molecules degrade, forming high molecular weight hydrocarbons with lubricating effect, with the catalytic effect becoming more pronounced as the Cu content increases.
研究领域:
材料科学
·
生物医学工程
·
表面工程
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高影响因子
Science of Advanced Materials
·
2018
·Vol. 10
·期 10
·1381-1388
·
IF 1.318
Yao Shujuan,Li Qiancheng,Kong Ningning,Li Chao,Wei Mingming,Song Ruru,Ren Xiaozhen,Pu Xipeng,Li Wenzhi
We presented facile synthesis of Cu3–x
Zn
x
SnS4 composites (CZTSs, 0 ≤ x ≤ 3) with variety morphologies via simple one-pot hydrothermal process without hazardous chemicals, simply by varying initial precursor Cu/(Zn +
Sn) concentration ratio. The influence of initial Cu/(Zn+Sn) concentration ratio on the microstructures and properties of composites was investigated. The morphological, structural, and optical properties of the samples were characterized by field-emission scanning and transmission electron
microscopes, X-ray diffraction, N2 adsorption–desorption, and UV-Vis diffuse reflectance. The photocatalytic activity of the samples was studied using visible light irradiation of rhodamine B. Benefiting from the initial precursor Cu/(Zn+Sn) concentration, the as-prepared
3D hierarchical carnation-flowerlike CZTSs with high initial zinc concentration exhibit superior adsorption capability and much higher photocatalytic activity than that with low initial zinc concentration. The possible degradation mechanism of RhB was proposed.
研究领域:
材料科学
·
环境科学
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高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Xue Ye,Yangzhou Xu,Peipei Zhang,Dongwang Zhu,Zhicheng Chen,Yudong Xia,Fulin Yang,Xinhua Gao,Jie Li
CO 2 hydrogenation to methanol is one of the most promising pathways for emission reduction. Unlike traditional synthesis gas (CO + H 2 ) to methanol, a major challenge is that the activation of inert CO 2 at high temperature will induce the reverse water-gas shift (RWGS) reaction to generate CO, thereby reducing the methanol yield. In this research, a novel catalyst Cu 7 Zn 3 Cr 0.3 was synthesized by the carbon microsphere-assisted sol-gel method, which remarkably achieved a maximum methanol space-time yield of 345.1 g kg cat −1 h −1 under mild conditions (200 °C, 3.0 MPa, and 21600 mL g cat −1 h −1 ). Characterizations combined with theoretical simulations show that Cr doping can affect the crystal structure of ZnO, resulting in the formation of more oxygen vacancies (O V s), and induce Cu to form a stable Cu 0 -O V -Cu + active center at the interface. This active structure efficiently enhances the adsorption and activation of CO 2 , while changing the reaction path to inhibit the production of CO. The results indicate that there is a clear linear relationship between the Cu + and O V s concentration and methanol yield, which could provide experimental references for the development of high-performance catalysts for CO 2 methanol production.
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