Scientific Reports
·
2022
·Vol. 12
·期 1
·1-10
·
IF 4.996
Tan Meina,Qin Yang,Wang Yiping,Zhang Fazhi,Lei Xiaodong
We propose a new Cu–Al dual-ion battery that aqueous solution composed of LiCl, CuCl and AlCl 3 (LiCuAl) is used as the electrolyte, CuS is used as the cathode of aqueous aluminum ion battery for the first time and copper foil is used as the anode. The assembled Cu–Al dual-ion battery yields a reversible capacity of 538 mA h/g at 200 mA/g, and exhibits longterm cycling stability of over 200 cycles with 88.6% capacity retention at 1000 mA/g. Above excellent performance is inseparable from the three components of LiCuAl electrolyte and electrode materials. The Al-storage mechanism of CuS is proposed that the S–S bond in CuS lattice interacts with aluminum ions during the aluminum storage process. In addition, the charging and discharging process does not cause irreversible damage to the S–S bond, thus Cu–Al dual-ion battery with CuS as cathode shows great cycle stability.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Ming Lei,Shun Guo,Zhiying Wang,Lihua Zhu,Heqing Tang
Fast and deep debromination of polybrominated diphenyl ethers (PBDEs) under mild conditions is a challenge in the field of pollution control. A strategy was developed to achieve it by exploiting Cu/TiO2 composites as a noble-metal-free catalyst. Toward the debromination of 2,2′,4,4′-tetrabromodiphenyl ether (BDE47) as a typical PBDE, the use of Cu/TiO2 as a catalyst and hydrazine hydrate (N2H4·H2O) as a reducing agent yielded a degradation removal of 100% and a debromination efficiency of 87.7% in 3 s. A complete debromination of BDE47 at 1500 mg L–1 was possible by successively adding N2H4·H2O. A debromination pathway involving active H atom species was proposed for the catalytic transfer hydrogenation (CTH) of PBDEs according to the identified degradation intermediates. A mechanism was further clarified by density functional theory calculations: electrons are delivered from N2H4·H2O to the metallic Cu atom via a coordination of N in N2H4·H2O with Cu atoms. The electron-trapped Cu atom interacts with adsorbed BDE47 to form a transition complex, and then the debromination of this complex occurs on the surface of Cu nanoparticles due to the hydrogen donation of N2H4·H2O through the CTH process. The new method provides a highly efficient method to remove brominated pollutants.
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Journal of the American Chemical Society
·
2024
·
IF 14.4
Chang Long,Kaiwei Wan,Yu Chen,Lei Li,Yuheng Jiang,Caoyu Yang,Qianbao Wu,Guoling Wu,Peng Xu,Jiong Li,Xinghua Shi,Zhiyong Tang,Chunhua Cui
As fuel and an important chemical feedstock, n-propanol is highly desired in electrochemical CO2/CO reduction on Cu catalysts. However, the precise regulation of the Cu localized structure is still challenging and poorly understood, thus hindering the selective n-propanol electrosynthesis. Herein, by decorating Au nanoparticles (NPs) on CuO nanosheets (NSs), we present a counterintuitive transformation of CuO into undercoordinated Cu sites locally around Au NPs during CO reduction. In situ spectroscopic techniques reveal the Au-steered formation of abundant undercoordinated Cu sites during the removal of oxygen on CuO. First-principles accuracy molecular dynamic simulation demonstrates that the localized Cu atoms around Au tend to rearrange into disordered layer rather than a Cu (111) close-packed plane observed on bare CuO NSs. These Au-steered undercoordinated Cu sites facilitate CO binding, enabling selective electroreduction of CO into n-propanol with a high Faradaic efficiency of 48% in a flow cell. This work provides new insight into the regulation of the oxide-derived catalysts reconstruction with a secondary metal component.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Guozhu Gao,Yong Zhang,Feifei Chen,Meiqin Xu,Chang Sun,Yangfan Song,Weihua Wang,Feng Lu,Hong Dong,Hui Liu,Yahui Cheng
Copper-based catalysts have been established as highly effective for facilitating the electrochemical reduction of carbon dioxide (ECO 2 RR), particularly in the synthesis of multi-carbon (C 2+ ) compounds. However, issues of product selectivity and reaction stability persist, posing significant challenges in the context of high-current-density industrial applications. In this study, we introduce a Cu-enriched Cu 3 N composite catalyst, synthesized via a straightforward magnetron sputtering technique. This catalyst is capable of activating CO 2 and efficiently adsorbing CO, thereby enhancing the electrocatalytic performance for the targeted reactions. At a potential of −1.2 V vs. RHE, the Faradaic efficiency (FE) of the C 2+ product reaches the highest value of 80.39 % with the current density of 267.78 mA cm −2 . Remarkably, the precisely engineered catalyst architecture integrated with a metallic copper (Cu) protective layer demonstrates significantly enhanced ECO 2 RR stability, maintaining C 2+ FE above 79 % for over 10 h at 200 mA cm −2 current density. These results provide a feasible approach for designing and implementing efficient and stable ECO 2 RR catalysts to generate C 2+ products for industrial applications.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Yue Chen,Yu Ma,Chen Liao,Jiacheng You,Huihuang Fang,Chongqi Chen,Yu Luo,Lilong Jiang
The construction and stabilization of Cu–O–Si interfaces in copper-based catalysts remain critical yet challenging for the water-gas shift reaction (WGSR), as conventional strategies fail to mitigate copper nanoparticle (NP) aggregation and interfacial instability. This study innovatively proposes a spatial confinement strategy by anchoring Cu NPs inside (Cuin/SBA-15) or outside (Cuout/SBA-15) the mesoporous channels of SBA-15, leveraging nanoscale confinement to optimize Cu–O–Si interfaces. The confined Cuin/SBA-15 catalyst demonstrated exceptional WGSR performance, achieving a reaction rate of 5.4 μmolCO·gcat−1·s−1, significantly surpassing conventional Cu/SBA-15 (3.1 μmolCO·gcat−1·s−1) and surface-loaded Cuout/SBA-15 (2.8 μmolCO·gcat−1·s−1), along with remarkable stability. This enhancement originates from the SBA-15 channels enabling the in situ formation of stable Cu–O–Si interfaces, which regulate the dynamic equilibrium between Cu0 (active for H2O dissociation) and Cu+ (critical for CO adsorption) species. In situ studies revealed their synergistic dynamic interconversion during WGSR, while domain confinement effects suppressed sintering by maintaining interfacial integrity. Kinetic and mechanistic analyses further identified the associative pathway, with HCOO* intermediate dissociation as the rate-determining step, facilitated by the stabilized Cu–O–Si interfaces. By resolving interfacial instability through confinement engineering, this work provides a paradigm for designing robust Cu-based catalysts, advancing both fundamental understanding and practical applications in WGSR and related heterogeneous catalysis.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Longlong Geng,Fengting Geng,Xianghan Cheng,Xiaoli Wang,Ling Wang,Xuliang Pang,Yong-Zheng Zhang,Xiuling Zhang,Da-Shuai Zhang,Shujuan Zhuang,Abdukader Abdukayum,Guangzhi Hu
Copper is a crucial element in the field of catalysis. However, Cu-based catalysts exhibit lower redox properties and surface energy under mild conditions, which limit their electron transfer capacities and catalytic performance. In this study, the relationship investigation between the hydrogenation behavior of Cu-based catalysts and crystal phases showed that spherical Cu 2 O exhibited enhanced capacity for hydrogen activation, excellent catalytic activity and outstanding reusability in the selective reduction of various nitroarenes. At even 25 °C and 1 atm, the complete reduction of 4-nitrophenol by NaBH 4 was achieved in 2.5 min over Cu 2 O, achieving a reaction rate constant ( k ) of 20.15 × 10 −3 s −1 , which was 4.8 and 15.2 times that of CuO and Cu catalysts. Detailed experimental and theoretical calculations revealed that the Cu + sites in the antifluorite crystal phase of Cu 2 O are conducive to the adsorption of active H species, while the unique d–s orbital recombination provides more electrons to improve its hydrogenation performance. The results of this study can aid in the development of copper-based materials as advanced catalysts, thereby improving fine chemical production and pollution treatment processes.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Ruofan Wang,Yanfu Yan,Wenjun Li,Zhiming Li
Cu–Al soft soldering plays a crucial role in the fabrication of Cu–Al composites. In this study, a new rosin-type flux for Cu–Al direct soldering was synthesized, and G-1 (Sn42Bi58 paste) and G-2 (Sn64.7Bi35Ag0.3 paste) soft soldering pastes were prepared. The results of flux physicochemical tests are as follows: density 1.11 g/cm 3 , pH 5.2, viscosity 32 Pa s, and non-corrosive to the copper plate. These are in line with the requirements for soldering applications. The wettability test results show that G-1 and G-2 displayed good wettability on the Cu and Al plates. This is in line with the standard Cu–Al soft soldering paste. The mechanical property test showed that G-2 had better mechanical properties than G-1, with a tensile strength of 112.57 MPa. SEM revealed that the IMC (intermetallic compound) layer of G-1 was flatter than that of G-2. This is closely related to the fact that the Ag in Sn64.7Bi35Ag0.3 powders can reduce the enrichment of metallic Bi and refine the grains.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hailun Geng,Shengying Zhao,Minghui Tan,Jie Yao,Hao Song,Chuang Gu,Tiecheng Shang,Wenzhong Shen,Guohui Yang,Noritatsu Tsubaki
Metal-zeolite catalysts are widely utilized in various industrial reactions. However, the size, loading, and reduction of metal species are interdependent, complicating efforts to optimize their catalytic performance. In this study, we introduce a novel strategy for the synthesis of metal-zeolite catalysts, termed the multi-amino effect. This new method involves functionalizing zeolite surfaces with aliphatic diamines, such as 1,3-diaminopropane, to leverage the multifaceted properties of the amino group. 1,3-diaminopropane is anchored to the zeolite framework via one terminal amino group, while the other terminal amino group facilitates the efficient loading and dispersion of Cu species through interaction with Cu 2+ . The multi-amino groups present in the structure enable the in situ multi-stage release of abundant NH 3 during calcination, facilitating the self-reduction of Cu species to generate a high proportion of Cu + and Cu 0 species. Notably, the Cu-MOR catalyst prepared by this approach exhibits a significantly improved methyl acetate production rate, which is 1.56 times higher than that of the traditional hydrogen reduction method and 1.37 times greater than that of the ammonia pool method, owing to the abundance of highly dispersed and highly active Cu sites (Cu + :Cu 0 ≈ 1:1). This multi-amino effect strategy will help to develop more efficient and tunable metal-zeolite catalysts, driving advances in industrial processes such as sustainable chemical production and energy conversion, with significant improvements in both catalytic activity and cost-effectiveness.
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LANGMUIR
·
2025
·
IF 3.9
Caiwen Pan,Qinghong Shi,Xiaoyan Dong,Linling Yu,Yan Sun
Effective degradation and detoxification of the highly toxic organophosphate pesticide methyl parathion (MP) are important for pollution treatment and sustainable development. Enzymatic hydrolysis of MP by organophosphate hydrolase (OPH) is an effective way. However, hydrolytic product 4-nitrophenol (4-NP) remains environmentally hazardous. A promising strategy is to reduce 4-NP to 4-aminophenol (4-AP), which not only is weakly toxic but also has high application value. To realize the cascade conversion of MP to 4-AP with the dual objectives of detoxification and recycling, we designed a chemoenzymatic catalyst by immobilizing the OPH within a reduction-catalytic nanocomposite (NCu) constructed by generating copper nanoparticles (Cu NPs) in a zirconium-based metal–organic framework, NU-1000. Optimized OPH@NCu exhibited a 239% enhancement in catalytic activity compared to free OPH, attributed to substrate enrichment by NCu and activation of OPH by Cu2+. Moreover, OPH@NCu exhibited an average cascade conversion rate of 11.1 μmol min–1 gcatalyst–1, achieving a complete conversion of 50 μM MP to 4-AP within 9 min by using a low reductant concentration (15 mM NaBH4). Notably, OPH@NCu demonstrated robust stability, retaining >86% of its activity after being stored for 10 days and nearly 80% of its activity over six reuse cycles. These results validate OPH@NCu as an efficient and sustainable platform for the cascaded detoxification and recycling of MP.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Bo Liu,Miao Cheng,Chunyang Zhang,Yitao Si,Jiancheng Zhou,Yuqi Ren,Jie Guan,Lunbo Duan,Maochang Liu,Dengwei Jing,Naixu Li
CO 2 photoreduction into high-value-added C 2+ products struggles with energetic challenges in forming critical intermediates and multiple C−C bonds. Herein, an effectively synthesized photocatalyst , Bi 2 WO 6 nanosheets with oxygen vacancies anchoring Au and Cu dual single atoms on the surface, can convert CO 2 and H 2 O vapour into C 3 H 6 and C 2 H 4 . The high product selectivity of 18.2 % for C 3 H 6 and 65.4 % for total C 2+ hydrocarbons are achieved under concentrated light irradiation (2.4 W·cm −2 ). Au-Cu dual-single-atom sites and defect engineering strategies exhibit synergistic effects on optimizing the reaction thermodynamics and charge kinetics for CO 2 conversion. Theoretical calculations provide reference values for reaction pathways of C 3 H 6 and C 2 H 4 formation, with the C−C couplings being potential determining steps of multicarbon product formation. Our work offers a promising strategy with a combination of concentrated light irradiation technology and catalyst modification to achieve high selectivity of C 2+ products.
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Advanced Energy Materials
·
2021
·Vol. 12
·期 6
·2103644
·
IF 29.368
Shaotang Yu,Bingyan Li,Jingjing Jiang,Xinge Liu,Shasha Hao,Shuaiqi Han,Weibo Yan,Hao Xin
Solution-processed Cu(In,Ga)(S,Se) 2 solar cells have reached 18% efficiency but still remain much lower compared to state-of-the-art vacuum based solar cells. In comparison to vacuum deposited precursor films, which mostly consist of stacked metal and/or metal chalcogenide layers and takes a liquid Cu 2− x Se assisted grain growth mechanism, solution-processed precursor films normally have a chalcopyrite structure that is already developed. Understanding the grain growth mechanism of solution-processed absorbers is crucial to control the electronic properties and further improve the device photovoltaic performance. Here, the grain growth mechanism of a N -methyl-pyrrolidone solution processed precursor film with composition from Cu-poor to Cu-rich is systematically investigated. Characterizations show that the chalcopyrite structured CuInS 2 precursor film takes a direct phase transformation grain growth mechanism and forms the CuIn(S,Se) 2 (CISSe) absorber without the presence of a detrimental Cu 2− x Se phase with Cu/In ratio up to unit. Beyond the stoichiometric composition, the coexistence of Cu 2− x Se facilitates grain growth but deteriorates device performance. The direct phase transformation mechanism not only avoids detrimental Cu 2− x Se but also enables fabrication of a highly efficient CISSe device near stoichiometric composition with high tolerance to the Cu/In ratio (from 0.90 to 1.05). By preliminary optimization, a CISSe solar cell with an efficiency of 13.6% is achieved in ambient air with a Cu/In ratio of 0.93.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Tianrui Li,Baoling Tang,Jiance Jin,Kai Han,Haoran Zhang,Hailian Zhao,Xuejie Zhang,Maxim Molokeev,Yuzhen Wang,Zhiguo Xia,Bingfu Lei
Cu(I)-based halide scintillators are promising candidates for X-ray detection due to excellent scintillation and low-cost solution processability. However, the rational design of Cu(I)-based halide scintillators remains challenging due to insufficient theoretical frameworks elucidating their structure-property correlations. In this work, two Cu(I)-based hybrid metal halides, Cu 2 I 4 -IC (Ionic compound) are designed and Cu 4 I 4 -CC (Coordination compound) via bonding mode control engineering. The Cu 2 I 4 -IC exhibits blue emission, and the Cu 4 I 4 -CC exhibits yellow emission, and the photoluminescence quantum yield (PLQY) of Cu 2 I 4 -IC and Cu 2 I 4 -IC are 91% and 100% respectively. The non-radiative transitions are reduced due to the high rigidity of Cu 4 I 4 , resulting in a light yield up to 67 500 photons MeV −1 and a detection limit as low as 47.3 nGy s −1 of Cu 4 I 4 -CC. Additionally, a high-performance scintillator hydrogel based on Cu 4 I 4 -CC with polyvinyl alcohol (PVA),H 2 O and dimethyl sulfoxide (DMSO) is innovatively developed. Owing to the high transmittance, the large-area scintillator hydrogel film (10 × 10 cm 2 ) achieves an X-ray imaging resolution of 14 lp mm −1 . Furthermore, the synergistic effects of hydrogen bonding and coordination bonding endow the hydrogel scintillator with excellent plasticity and flexible stretchability. The Cu 4 I 4 -CC@PVA hydrogel proves promising for X-ray imaging with excellent stability in harsh environments, matching state-of-the-art scintillators.
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