FUEL
·
2026
·
IF 7.5
Zhenhua Ji,Zhongqiang Bao,Zihao Wu,Peng Zhang,Rui Yang,Ding Luo,Hao Chen
As the most effective after-treatment technology for NH 3 emission control in road vehicles, Ammonia Slip Catalyst still faces challenges such as insufficient catalytic activity and low selectivity to the reaction product N 2 . Especially, the performance bottleneck in anti-aging greatly limits the commercial application of the catalyst, and there are still research gaps. Based on this, this study aims to reconstruct the structure − activity relationship of the catalyst by directionally constructing TiO 2 with a multi − scale channel core − shell structure as the support based on introducing different contents of Pt and Cu dual active components, and to explore the regulation and improvement mechanism of the catalytic performance including anti − aging property under the multi − dimensional synergistic effect. The results indicate that by enhancing the mass transfer capability of the catalyst with three-dimensional mass transfer channels and the influence of the dual active components, Pt 5 -Cu 1 /TiO 2 with a Pt − Cu content ratio of 5:1 achieves the best catalytic activity and N 2 selectivity. The Density Functional Theory calculation results show that due to the relatively low free energy of the key intermediate HNO, the Pt content plays a dominant role in the formation of N 2 O. Based on the relatively low free energy of the key intermediate NH 2 and the sequential dehydrogenation order, the thermodynamic conditions for the N 2 formation pathway under the catalytic action of Cu are extremely favorable, with relatively small kinetic barriers. Compared with Pt, the NO X formation pathway under the catalytic action of Cu has a smooth energy decrease and is more likely to occur, but it is also affected by the complex competition in the synergistic effect of the dual active components. The 17.69 % content of Pt 4+ in the active components of the catalyst after aging is the main reason for the decline in activity. The thicker shell layer reduces the collapse of the core–shell structure at high temperatures, laying a stable structure–activity relationship foundation for maintaining high activity. The prepared Pt 5 -Cu 1 /TiO 2 still meets the emission regulation limits after aging, showing good anti-aging performance.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Bolun Mei,Yueru Wang,Zhouxuan Zang,Ouyang Liu,Xu Liang,Guoji Liu,Han Sun,Xingchuan Yang,Li Xu
Calcination-driven Cu exsolution from a CuZr precursor tunes the Cu-ZrO 2 interfacial environment. • Catalysts with the optimal interfacial environment achieve ethanol selectivity approaching 90%. • Kinetic analysis and in situ DRIFTS support a dehydration‑hydrogenation pathway at the Cu-ZrO 2 interface. • DFT reveals that Cu-ZrO 2 interface converts high-barrier concerted dehydration into a lower-barrier stepwise route. The selective hydrogenolysis of ethylene glycol (EG) to ethanol is a critical step in the dimethyl oxalate (DMO)-to-ethanol process, yet the catalytically relevant Cu environment for this transformation remains insufficiently understood. Here, we prepared a series of CuZr catalysts with distinct Cu-ZrO 2 interfacial structures through calcination-induced structural evolution. Structural characterization reveals that calcination progressively redistributes Cu species from a more bulk-associated state in ZrO 2 to surface-enriched Cu, and ultimately to segregated Cu-rich domains. Among the catalyst series, calcination at an intermediate temperature of 550 °C gave the best performance. Ethanol yield scaled with the accessible Cu surface area, and both exhibited a volcano-type dependence on calcination temperature, whereas the Cu-normalized TOF decreased monotonically. This discrepancy underscores that exposed Cu alone cannot account for the catalytic behavior, and suggests an important contribution from coupled Cu-ZrO 2 interfacial environments. Kinetic analysis and in situ DRIFTS support a pathway involving dehydration-related transformation of EG followed by hydrogenation of carbonyl-type intermediates. DFT results further suggest that, relative to pristine ZrO 2 , the Cu-ZrO 2 interface stabilizes dehydration related carbon-containing intermediates, thereby enabling a more accessible stepwise pathway for EG dehydration and facilitating the subsequent hydrogenation to ethanol. These findings provide an interface engineering strategy for designing Cu-based catalysts in the DMO-to-ethanol process and related polyol hydrogenolysis reactions. Download: Download high-res image (129KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Dan Liu,Shizhi Tan,Xujia Pan,Fei Mao,Haojie Qian,Zebo Wu,Huibin Yin,Shiyuan Gao,Yongjun Xu
Cu-based catalysts are prone to sintering and deactivation under the high-temperature conditions of methanol aqueous-phase reforming of methanol (APRM). ZnAl 2 O 4 spinel has attracted much attention due to its flexible surface properties and tunable structural composition. Therefore, this study proposes a dual-modification strategy involving the incorporation of ZnO nanosheets and sesbania powder(SP)-derived carbon species on ZnAl 2 O 4 spinel support, thereby promoting the highly dispersed distribution of Cu nanoparticles and preparing a Cu/ZnO–ZnAl 2 O 4 –C catalyst (CZZAC). The H 2 production rate of the CZZAC catalyst is 66.22 μmolH 2 /g cat ./s under 210 °C. Based on the TPSR characterization analysis of the APRM reaction path, the results show that the CZZAC catalyst begins to produce hydrogen at 145 °C and follows the reaction path of the methyl formate intermediate product. This research has prepared a novel spinel nanosheet, demonstrating its effectiveness in preparing highly dispersed Cu catalysts, and providing a practical and economical alternative to noble metal catalysts.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xiaoxiao Zheng,Jiaming Wang,Peipei Lei,Qihong Xue,Xian Kan,Jiangang Chen
An enhanced Cu + /Cu 0 catalytic structure via the electronic effect of K was fabricated; • The proper amount of K could regulate the ratio of Cu + /Cu 0 and promote Cu dispersion; • Both the enhanced Cu + /Cu 0 ratio and the smaller Cu size promote the generation of MG; • The increased basic sites by the K doping remarkably increase the ethers by-products; • The deactivation was caused by the boosted Cu + ratio and the coated active sites by K. In this work, the CuZr 2 catalysts with significantly enhanced Cu + /Cu 0 catalytic active structures via the electronic effect of K were synthesized by the means of citrate complexation and used for dimethyl oxalate (DMO) hydrogenation to methyl glycolate (MG). The CuZr 2 –1.0 K sample exhibited the most outstanding performance, achieving a DMO conversion of 93.4% and MG selectivity of 85.8%. And the role of K in Cu-based catalysts for DMO hydrogenation is universal. The reduction of the catalyst was inhibited after potassium addition, lowering the Cu 0 content, thus leading to a decrease in the H 2 adsorption capacity of the catalyst, and accordingly, its activity decreased. The results showed that the ratio of Cu + /Cu 0 increased after K doping, and the adsorption strength of the catalyst for H 2 was weakened, which inhibited the deep hydrogenation of DMO. Simultaneously, the smaller size of metallic Cu via the appropriate amount of K doping facilitated the desorption of MG. Therefore, the selectivity for the target product MG was remarkably improved. However, the basic sites on the catalyst surface could increase after K doping, which would lead to an increase in the ether by-products. As the reaction proceeded, the ability of the catalyst to adsorb and activate H 2 was diminished due to the significantly increased surface K content and Cu + ratio, leading to the deactivation of the K-doped catalyst. This study provides a potential pathway for alkali metals to regulate the electronic structure of Cu-based catalysts and apply them to the hydrogenation of DMO to MG. Download: Download high-res image (258KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Wei Yang,Wenbo Jiang,Qiming Huang,Tianchi Leng,Leyi Zhang,Yaxin Zhang,Shan Chen,Yuanqing Gao,Yimin Fang
The urgent need for rapid, low-cost pathogen diagnostics in resource-limited settings drives the development of point-of-care technologies that balance sensitivity, specificity, simplicity, and cost. Here, we present a biosensing platform by integrating an aptamer-poly-T DNA strand for rapidly loading copper nanoclusters (Cu NCs) on the target pathogen and size-exclusion filtration to concentrate the pathogen onto a membrane, enabling ultrasensitive visual detection of low-abundance pathogens within 20 min by naked eyes. The aptamer domain enables the pathogen-specific recognition (validated by Salmonella and SARS-CoV-2 pseudovirus), while the poly-T template facilitates the rapid (<5 min) loading of Cu NCs to the target. The Cu NC-labeled target pathogens were then concentrated on the membrane, while the matrix interferents (salts, proteins), as well as the unbound Cu NCs can be washed away from the membrane due to their relatively small sizes. The efficient release of thousands of Cu2+ from the Cu NCs enables the sensitive coloration of the membrane in the presence of TEA, yielding a 10,000-fold sensitivity gain over colloidal gold assays. This cascaded mechanism achieves a detection limit of 10 particles/μL in undiluted serum. The sensing platform is applicable to other biological particles such as exosomes (cancer biomarkers) with low cost (a per-test cost < $1). By merging molecular specificity with field-deployable robustness, this technology redefines decentralized diagnostics for emerging bacterial or viral threats, offering transformative potential for epidemic surveillance and precision public health interventions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Green Energy & Environment
·
2025
·
IF 14.6
Ruifeng Wang,Yuchang Liu,Yandong Li,Yafen Kong,Qizhi Chen,Shuangliang Zhao
Efficiency of C-C bond coupling in highly inert CO 2 is relatively low, which severely limits its efficient conversion to acetate. Here, we successfully developed a highly stable NF@CoMn 2 O 4 @Cu 2 O-Ag bimetallic active site catalyst by anchoring Ag on the Cu 2 O surface. In this catalyst, the Co 3+ /Mn 3+ -Mn 4+ removes excess electrons from the Cu + sites via strong electronic interactions, preventing the reduction of Cu 2 O to metallic Cu 0 , which ensures the NF@CoMn 2 O 4 @Cu 2 O-Ag exhibits a high resistance to deactivation. The Cu + active sites of NF@CoMn 2 O 4 @Cu 2 O-Ag efficiently electroreduce CO 2 to the *CO atop intermediate, while the Ag active sites efficiently electroreduce CO 2 to the *CO bridge intermediate. The proximity of Cu + /Ag bimetallic sites shortens the distance for C-C bond coupling between the *CO atop and *CO bridge intermediates, facilitating the efficient electrocatalytic coupling of CO 2 to synthesize acetate. DFT analysis indicates that the ΔG required for C-C bond coupling on the short-distance Cu + /Ag bimetallic sites of NF@CoMn 2 O 4 @Cu 2 O-Ag is significantly lower than that of NF@CoMn 2 O 4 @Cu 2 O, enabling a high Faradaic efficiency of 64.97% for acetate production at -0.3 V vs. RHE. This study provides an effective strategy for the rational design of synergistic catalysis between heterometallic catalytic sites to efficiently achieve C-C coupling for the synthesis of C 2+ products.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ping Liang,Jianbin Lin,Xiongcong Guan,Jie Wang,Xinxin Zhang,Xin He,Qi Feng,Chi Zhang
Self-supported nanoporous metal foils with precisely engineered architectures are promising for catalysis, sensing, and environmental remediation, yet their scalable fabrication remains challenging. Here, we present a sequence-controlled liquid gallium (Ga)-assisted alloying/dealloying strategy, integrated with thermal evaporation, to construct Ag-modified nanoporous copper (Cu) foils. By varying the Ag deposition sequence, two distinct architectures were obtained: one features Ag 3 Ga intermetallic decorations, while the other forms a continuous Ag network within the nanoporous Cu. Subsequent electrooxidation generates Cu x O nanoneedles as catalytically active sites. The architecture with dispersed Ag 3 Ga yields exceptional non-enzymatic glucose sensing with high sensitivity, low detection limit, and long-term stability. In contrast, the continuous Ag network promotes outstanding photo‑Fenton degradation of organic dyes within minutes and excellent reusability. This work demonstrates a versatile approach to spatially control noble metal distribution in nanoporous Cu foils, enabling multifunctional catalytic systems for biosensing and environmental purification.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 85
·81767-81773
·
IF 3.289
Jiaxun Hu,Shuqing Wu,Qin Cao,Wenda Zhang
A facile approach was developed to synthesize core–shell structured alumina/Cu microspheres by means of activation by silver nanoparticles in situ deposited on the polydopamine-coated alumina microsphere surface. This approach takes advantage of both the sufficient reductive capacity of polydopamine towards silver ions and the high activation of silver nanoparticles towards copper deposition. The chemical compositions of composite microspheres were characterized by energy dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR). The surface morphologies and crystalline structures of the coated alumina were studied by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD), respectively. The adhesion strength between the copper layer and the substrate was evaluated by ultrasonic exposure and thermal shock test. The results showed that silver nanoparticles effectively catalyzed the copper deposition reaction on the polydopamine-coated surface, which led to a faster and more reliable plating process compared with the process without activation. The compact and continuous copper layer obtained showed strong adhesion on the substrate surface.
研究领域:
材料科学
·
纳米技术
·
表面工程
·
复合材料
·
功能材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Han Xu,Yiming Zhao,Xuan Miao,Mingyu Li,Hongjun Ji,Yufeng Li
Low-dielectric glass sealing is important for advanced electronic packaging; however, integrating such glasses with high-expansion metals such as Cu and stainless steel (SUS 304) remains challenging because of thermal-expansion mismatch and limited interfacial adhesion. In this work, ZnO was incorporated into a borosilicate glass matrix to tailor the thermophysical properties and promote interfacial bonding. Microstructural analyses show that Zn 2+ tends to form [ZnO 4 ] structural units and reduce non-bridging oxygen, thereby restricting alkali-ion mobility and maintaining low dielectric loss. Meanwhile, the partial substitution of SiO 2 by ZnO lowers the average network rigidity, leading to a reduced glass transition temperature and an increased CTE of 11.4 × 10 −6 °C −1 . At the hetero-interfaces, ZnO promotes the formation of a ZnCr 2 O 4 /NaCrO 2 composite layer on SUS 304 and Zn/Cu interdiffusion near the Cu side. Under the selected sealing condition of 810 °C for 10 min, the Cu/glass/SUS 304 joints achieved a shear strength of 20.3 ± 3.8 MPa. These results suggest that ZnO-doped borosilicate glass is a promising low-dielectric sealing material for heterogeneous electronic packaging.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Lingli Lv,Lingxi Xia,Haoming Wang,Xue Xia,Xia Huang
A Cu foam supported Ni Cu nanowire electrode (Ni-CuNW) was fabricated and optimized. • Ni species modulated electronic structure of Cu and redistributed surface electron. • High-efficient NO 3 − to NH 3 conversion was achieved in neutral-media conditions. • Ni-CuNW enabled ~100% NO 3 − removal with 99.5% NH 4 + -N selectivity and 95.5% NH 3 FE. • FE for NH 3 production maintained above 90% across various NO 3 − concentrations. Electrocatalytic nitrate-to-ammonia conversion has emerged as a pivotal green technology that simultaneously enables waste valorization and sustainable ammonia production, offering a promising alternative to the energy-intensive Haber-Bosch process. Herein, we reported a highly efficient Ni-decorated Cu nanowire electrode (Ni-CuNW) that exhibited remarkable electrocatalytic activity under challenging neutral media, which typically suffers from insufficient H* supply and severe competition from the hydrogen evolution reaction (HER). The optimized electrode achieved near complete nitrate removal with 99.5% NH 4 + -N selectivity and 95.5% Faradaic efficiency (FE) for NH 3 production during treatment of nitrate-laden wastewater (50 mg L −1 NO 3 − -N), and maintained an NH 3 FE of 90% even in high-concentration wastewater containing 2000 mg L −1 NO 3 − -N. An integrated reactor incorporating an in-situ ammonia recovery unit was constructed, and over 95% nitrate removal and 85% NH 3 recovery were achieved under various nitrate concentrations, demonstrating its robust practical applicability. Mechanism studies revealed that the superior performance originated from the incorporation of Ni(OH) 2 species, which modulated the electronic structure of Cu and induced surface electron redistribution. This electronic structure modulation accelerated interfacial electron transfer and strengthened the adsorption of NO 3 − and nitrogen-containing intermediates. Concurrently, Ni species incorporation selectively suppressed the competing HER at active sites, thereby endowing the Ni-CuNW electrode with exceptional FE for NH 3 production. This work presented an efficient and scalable strategy for synthesizing advanced electrocatalysts suitable for both wastewater remediation and sustainable ammonia production. Download: Download high-res image (140KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2026
·
IF 7.6
Runze Wei,Junhong Jia,Rui Deng,Mengrong Tian,Xuan Ren,Zongyu Zhang,Yun Shi,Nairu He,Jie Yang
To investigate the influence of different powder addition strategies on the properties of Ag-containing lubricating coatings, NiCrAlY-Mo-Ag-Cu coatings incorporating different (Ag, Cu) powders (direct doping, core-shell structure, and powder alloyed) were fabricated via atmospheric plasma spraying. Combining characterization techniques and density functional theory calculations, the friction behavior, tribological properties, and underlying mechanisms of the three coatings were explored through constant-temperature friction tests and thermal cycling friction tests over a wide temperature range. The results indicate that the core-shell structure process helps reduce coating porosity (from 2.61% to 1.68%), but the average hardness of the coating decreased by 12.5% (230.6 HV → 201.8 HV). The alloying strategy circumvented hardness degradation, striking a balance between coating densification and mechanical robustness. At 800 ℃, a composite tribofilm comprising simple metal oxides (e.g., NiO, Cr 2 O 3 , and Al 2 O 3 ) and high-temperature lubricating phases (NiMoO 4 , Ag 2 MoO 4 , CuMoO 4 ) developed on the surface, effectively suppressing silver agglomeration and depletion. Owing to the synergy of these effects, the AgCu-alloyed coating achieved a low coefficient of friction (COF) of 0.25 at 400 ℃ and demonstrated a ∼30.9% reduction in wear rate during the 800 ℃ thermal cycling test compared to the direct-doping coating.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xin Wen,Guiqiang Fei,Xue Jiang,Kuan Wang,Mei-Jie Shi,Zhen-Hong He,Weitao Wang,Huan Wang,Xiaojuan Lai,Zhao-Tie Liu
A heterostructured Ag/Cu 2 O-ZrO₂ catalyst was synthesized via an interface engineering strategy. • The Ag/Cu 2 O-ZrO₂ possesses a substantial number of Cu-O-Zr heterointerfaces with dispersed Ag sites • The optimized Ag/Cu 2 O-ZrO₂ catalyst demonstrates exceptional CO₂-to-C 2 fuels conversion performance. • Possible mechanism for boosting electroreduction of CO 2 reduction was proposed. • The present work sheds light on the customization of interfacial engineering with dispersed active sites. The efficient electrocatalytic reduction of carbon dioxide (CO 2 ) into multi‑carbon (C 2+ ) products is critical for sustainable carbon management, yet remains limited by poor selectivity and sluggish C C coupling kinetics. Herein, a heterostructured Ag/Cu 2 O-ZrO 2 catalyst was synthesized via an interface engineering strategy to promote C 2 production during CO 2 electroreduction. The incorporation of highly dispersed Ag nanoparticles and ZrO 2 domains onto Cu 2 O nanocrystals generates abundant Cu-O-Zr heterointerfaces, which synergistically regulate the local electronic environment and intermediate conversion behavior. In this catalytic system, the dispersed Ag sites act as efficient *CO-generating centers to enrich local CO coverage, while the Cu-O-Zr interfacial domains stabilize oxygen-containing C C coupling intermediates and facilitate their subsequent hydrogenation toward C 2 products. Benefiting from the tandem synergy between CO enrichment and interfacial intermediate stabilization, Ag/Cu 2 O-ZrO 2 catalyst achieves a high C 2 Faradaic efficiency of 78.2% and a C 2 partial current density of 17.1 mA·cm −2 at −1.3 V vs. RHE, outperforming Cu 2 O and Cu 2 O-ZrO 2 counterparts. In situ infrared spectroscopy reveals the efficient evolution of key intermediates from *COOH to *CO and subsequently to *OCCO during electrocatalysis. Meanwhile, DFT calculations demonstrate that Ag promotes *CO accumulation and suppresses its premature desorption, whereas the Cu-O-Zr interface stabilizes *OCCO and *CHCHO intermediates and lowers the corresponding energy barriers for C 2 formation. This work provides mechanistic insights into tandem interface engineering for selective CO 2 electroreduction toward multi‑carbon fuels through the spatially cooperative regulation of CO generation and C C coupling pathways. Download: Download high-res image (321KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）