ChemCatChem
·
2025
·
IF 3.9
Minglu Zhu,Yuyin Wang,Minghao Du,Xing Zhang,Haoyu Liu,Zhihua Qiao,Juanjuan Yang,Bo Peng,Lei Nie,Zhenglong Li
The catalytic conversion of bio-ethanol to butanol is a pivotal reaction for producing renewable fuels and chemicals from non-edible biomass. Developing non-noble metal-based catalysts that exhibit high activity and stability is of great importance, yet remains a substantial challenge. Herein, Cu/LDH catalyst (Cu supported on MgAl layered double hydroxide), was synthesized via simple impregnation without further calcination, and demonstrated for the activity enhancement of ethanol-to-butanol reaction with superior conversion/yield than previous reports of LDH-derived materials. The catalytic activity of Cu/LDH-150(Red) catalyst is attributed to the interaction between Cu and LDH, induced by the pre-reduction during synthesis. It has been further revealed that the Cu species provides redox sites for dehydrogenation/hydrogenation reactions, promoting the critical initial reaction step ethanol dehydrogenation to acetaldehyde. And pre-reduction of Cu/LDH catalyst facilitates the reduction of Cu 2+ to Cu 0 /Cu + and promotes the incorporation of Cu into the interlayer of LDH, as evidenced by XPS and mechanistic validation with acetaldehyde feed, responsible for the activity enhancement. Graphical A non-noble Cu/MgAl-LDH catalyst, synthesized via simple impregnation without calcination, efficiently converts bio-ethanol to butanol. Pre-reduction enhances activity by generating Cu 0 /Cu + species and structural integration, providing redox sites for key ethanol dehydrogenation to acetaldehyde. This design offers a high-performance, stable catalyst for renewable fuels.
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Small
·
2019
·Vol. 15
·期 28
·1901606
·
IF 10.856
Ming-Yu Li,Muni Yu,Dong Su,Jianbing Zhang,Shenglin Jiang,Jiang Wu,Qingping Wang,Sisi Liu
Strong near-surface electromagnetic field formed by collective oscillation of electrons on Cu nanostructure a shows a strong dependence on geometry, offering a promising approach to boost the light absorption of ZnO photoactive layers with enhanced plasmon scattering. Here, a facile way to fabricate UV photodetectors with tunable configuration of the self-assembled Cu nanostructures on ZnO thin films is reported. The incident lights are effectively confined in ZnO photoactive layers with the existence of the uplayer Cu nanostructures, and the interdiffusion of Cu atoms during fabrication of the Cu nanostructures can improve the carrier transfer in ZnO thin films. The optical properties of the hybrid architectures are successfully tailored over a control of the geometric evolution of the Cu nanostructures, resulting in significantly enhanced photocurrent and responsivity of 2.26 mA and 234 A W −1 under a UV light illumination of 0.62 mW cm −2 at 10 V, respectively. The photodetectors also exhibit excellent reproducibility, stability, and UV–visible rejection ratio ( R 370 nm / R 500 nm ) of ≈370, offering an approach of high-performance UV photodetectors for practical applications.
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Science China-Materials
·
2020
·Vol. 64
·期 5
·1087-1094
·
IF 6.098
Wang Rui,Shi Faxing,He Xin,Shi Jinqiang,Ma Tao,Jin Song,Tao Zhanliang
The uneven deposition of lithium (Li) on current collectors causes serious dendrite growth and volume expansion. Commercial foamed copper (Cu) current collectors are unsuitable for Li anodes because of their large volume and mass and lithiophobic nature. Herein, a three-dimensional (3D) copper@tin (Cu@Sn) nanocone current collector with small volume, light weight, and lithiophilic nature was prepared by a simple electrodeposition method. The synergy of the nanoconical structure and lithiophilic Sn promotes the even deposition of Li and effectively inhibits the formation of Li dendrites. The resultant half batteries exhibit high Coulombic efficiency of 97.6% after 100 cycles at 1 mA cm −2 , and the symmetrical Li battery demonstrates a prolonged lifespan of over 600 h at 1 mA cm −2 . The full battery based on organic liquid electrolyte with LiFePO 4 also exhibits a long lifespan of 550 cycles with high capacity retention of 95.1% at 1 C. Moreover, 3D Cu@Sn nanocone-based solid-state batteries exhibit excellent electrochemical performance and show no decay after 500 cycles at 1 C. Our work provides a strategy for fabricating 3D current collectors for high-energy-density Li metal batteries.
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RENEWABLE ENERGY
·
2020
·
IF 6.274
Yunwu Zheng,Jida Wang,Can Liu,Yi Lu,Xu Lin,Wenbin Li,Zhifeng Zheng
To eliminate the problematic need for liquid phase, high temperature, and high pressure, as well as the excessive consumption of hydrogen and production of aromatic hydrocarbons, associated with traditional aviation oil preparation processes, Ni–Cu bimetallic catalysts were synthesized and evaluated for ex situ catalytic pyrolysis vapor upgrading of oleic acid under a N 2 atmosphere. The effects of catalyst support (AC, Al 2 O 3 , ZrO 2 , HZSM-5, HUSY, Hβ and MCM-41), pyrolysis process parameters (pyrolysis temperature, catalytic temperature and amount of oleic acid injected), and the mixing ratio of modified metals (Ni:Cu = 0:1,2,1:1,1:2,1:0) on the catalytic conversion of oleic acid to high-quality chemicals were studied. The catalysts were characterized by XRD , BET and NH 3 -TPD. Modified bimetallic catalysts show great potential for green diesel production without the use of H 2 feed. The abundance of Brønsted acid sites favors HDO routes (such as HZSM-5, HUSY, Hβ and MCM-41), while Lewis acid sites (such as ZrO 2 and Al 2 O 3 ) favor hydrogenation and decarbonylation reactions. The addition of Cu enhances the reducibility of Ni and inhibits the cracking reaction and deactivation caused by coke. The addition of Ni effectively promotes the conversion of oleic acid, accelerates the fracture of C–C and effectively improves the production of hydrocarbons. The highest conversion was 100% with 85.68% selectivity towards hydrocarbons under pyrolysis at 450 °C, a catalytic temperature of 500 °C, and a feed quantity of oleic acid of 0.25 ml/min using Ni–2Cu/MCM-41 catalysts, and the oxygen removal efficiency and selectivity of C17 hydrocarbon were the highest (85.68% and 26.77%, respectively). The main products were olefins . In addition, the regenerated catalyst had good stability and could be used for at least 3 reaction cycles without observation of significant deactivation.
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Water
·
2023
·Vol. 16
·期 1
·121
·
IF 3.4
Xiaoze Yin,Huaqin Yin,Renjie Wang,Jinnan Wang,Aimin Li
Novel Fenton-like catalyst HKUST-1(Cu)/MoS2-3-C with a non-equilibrium-state surface was constructed for selective degradation of phenolic contaminants. Electron-polarized distribution facilitated the formation of σ-Cu-ligand between electron-poor Cu centre and phenolic compounds, which not only enhanced radicals generation but also accelerated the Cu(I)/Cu(II) redox. Meanwhile, ≡Mo–OOSO3−complexes formed by the electron-rich Mo centre and peroxymonosulfate (PMS), could directly oxidize phenolic contaminants with the generation of SO4•−. The radical quenching experiments and EPR tests indicated that both SO4•−and•OH played a dominant role in the reaction. Additionally, O2could be reduced to O2•−by OVs and subsequently converted into1O2over the Mo centre. DFT calculation, FT-IR, and in situ Raman spectra analysis results demonstrated that phenolic compounds and PMS were respectively adsorbed by electron-poor Cu centre and electron-rich Mo centre, favouring the electrons transfer from phenolic contaminants to Mo centre for PMS activation. With synergistic effects of σ-Cu-ligand and ≡Mo–OOSO3−complexes, HKUST-1(Cu)/MoS2-3-C achieved a high degradation rate of phenolic contaminants and utilization efficiency of PMS.Keywords:fenton-like catalyst;non-equilibrium-state surface;σ-Cu-ligand;≡Mo–OOSO3−complex;phenolic contaminants degradation
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yu Su,Bo Zhang,Xiang Cheng,Kun Du,Leqing Feng,Wei Zhao
Herein, a novel sunlight-independent tribocatalytic system with efficient friction energy harvesting capability is proposed. This system demonstrates enhanced tribocatalytic performance of cerium oxide (CeO 2 ) nanoparticles driven by the friction between Cu coated on the glass beaker bottom and a Teflon (PTFE) magnetic disk. An apparent rate constant of 0.045 min −1 was achieved for methylene blue (MB) degradation, representing a 2.7-fold improvement over the CeO 2 @glass/PTFE system (0.01682 min −1 ). Notably, the system achieved > 90% degradation efficiency for high-concentration MB solutions (40 mg/L), surpassing the performance of previously reported tribocatalytic systems. Through multiscale tribo-interface characterization and radical trapping experiments, the synergistic catalytic mechanism was elucidated: Friction-induced charge carriers in CeO 2 are efficiently transferred via the interfacial electronic effects of the Cu/PTFE friction couple and the active surface with Ce 3+ /Ce 4+ redox couples. Electron paramagnetic resonance analysis confirmed that Cu coating modification on the surface of the beaker bottom enhanced hydroxyl radical (·OH) yield by 2.3-fold compared to glass, enabling complete pollutant degradation through hole (h + )-dominated oxidation pathways. This work transcends conventional catalyst modification strategies, establishing a new paradigm for interface engineering in mechano-chemical energy conversion systems.
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ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Chengwan Wang,Junchen He,Aoyu Shen,Tong Xie,Ruo Huang,Xian Wu,Yue Yuan,Sheng-Tao Yang
Nitrate (NO 3 - ), a prevalent pollutant in aquatic ecosystems, poses significant ecological and human health risks due to its excessive accumulation, which accelerates eutrophication. In this study, a novel bimetallic material (B-Fe/Cu) was synthesized via high-energy ball milling using micron-sized zero-valent iron (ZVI) and copper salts. When integrated with ultraviolet (UV) light, the UV/B-Fe/Cu system achieved complete conversion (100%) of 10 ppm NO 3 - -N within 120 minutes. Intriguingly, abundant Cu species were found to mediate the efficient redox cycling between Fe 3+ and Fe 2+ , and superoxide radicals (O 2 ·- ) facilitated the redox cycling between Fe 3+ /Fe 2+ and Cu 2+ /Cu + , while the localized micro-acidic microenvironment of B-Fe/Cu enabled the dynamic pH regulation during nitrate reduction. These triple functionalities ensured the full nitrate conversion in UV/B-Fe/Cu system without toxic NO 2 - byproduct formation across a wide pH range of 3.0-11.0. Furthermore, the UV/B-Fe/Cu system demonstrated exceptional operational stability and environmental robustness, retaining >90% reduction efficiency after four consecutive reuse cycles. These insights advance the rational design of iron-based materials for scalable and sustainable water purification technologies.
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PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Zhiyu Zhang,Jianfeng Zheng,Yujing Han,Guoyu Wang,Hongqiang Yang,Zhanggen Huang
The excellent CO 2 adsorption capacity of 13X zeolite makes it a promising candidate for carbon capture, and its performance can be further improved by methods like metal incorporation. However, the definitive relationship between extra-framework unsaturated metal sites and CO 2 adsorption mechanisms remains poorly understood. In this work, a convenient strategy was developed to optimize the proportion of Cu 2+ species in CuX zeolites by adjusting the Cu loading and calcination temperature. Through dynamic and static adsorption measurements, the optimized sorbents 3CuX-450 (3 wt% Cu, calcined at 450 o C) exhibited significantly enhanced CO 2 uptake, adsorption rate, and adsorption heat. Comprehensive characterization, including XPS, H 2 -TPR, and DFT calculations, elucidated the evolution and the quantity of Cu 2+ species. The 3CuX-450 sorbent had relatively high CO 2 uptake, adsorption rate and adsorption heat. Meanwhile, it demonstrated excellent recyclability and maintains its performance for 10 successive adsorption-desorption cycles. This study deepens the understanding of mechanistic role of cations in FAU zeolites. The findings of this study can be applied to the rational design of optimized CO 2 active sites in zeolite-based sorbents.
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FUEL
·
2026
·
IF 7.8
Yunfeng Lei,Huilin Liu,Shunxiang Wang,Fu Ze Ho,Wen Da Oh,Yong Foo Wong,Yongjin Zou,Yong Shen Chua
Hydrazine borane (N 2 H 4 BH 3 ) has been recognized as an attractive hydrogen storage material owing to its high hydrogen capacity of 15.4 wt%. However, the methanolysis of N 2 H 4 BH 3 remains a challenge, as only BH 3 moiety of N 2 H 4 BH 3 can be utilized to produce H 2 . In the present work, we reported an efficient Cu@Ni/MoO 3 core–shell catalyst that is capable of fully utilizing the H atoms on both BH 3 and N 2 H 4 moieties of N 2 H 4 BH 3 via methanolysis, releasing 5.5 equivalents of gas at 50 °C. This study represents the most efficient catalyst for methanolysis of N 2 H 4 BH 3 reported to date. The improved catalytic activity of Cu@Ni/MoO 3 catalyst may be attributed to the collective improvement on the catalyst, which includes increased specific surface area of the catalyst, formation of an electron deficient Cu@Ni catalyst surface induced by MoO 3 and favorable reacting environment involving KOH as a catalyst promoter. The development of low-cost and highly efficient catalysts may encourage the application of N 2 H 4 BH 3 as a promising hydrogen storage material.
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ChemSusChem
·
2026
·Vol. 19
·期 1
·e202501680
·
IF 6.6
Jinlong Wu,Haiqiang Mu,Min Zhu,Xueru Zhao,Ting Zhang,Jiaxin Bai,Jin Zhang,Feng Li,Jing Li
Copper-based catalysts offer promise for CO 2 -to-C 2+ conversion but suffer from instability of Cu + species, which are active sites critical for enabling C−C coupling. In this work, we synthesized Lanthanum (La)-doped Cu x O (La-Cu x O) catalysts with varying La/Cu ratios to investigate how the interplay between doping-induced electronic effects and grain boundary (GB)-driven stabilization affects deep CO 2 reduction to C 2+ . Combined density functional theory calculations and in situ spectroscopic characterization reveal that the unique 4f orbital configuration and strong Lewis acidity facilitate charge transfer of La, stabilizing Cu + during CO 2 reduction reaction (CO 2 RR), while simultaneously inducing lattice distortion to increase GB density. This modulation preserves Cu + /Cu 0 interfaces while enhancing *CO dimerization kinetics. Furthermore, La doping boosts *CO coverage at GB-rich regions and lowers the C−C coupling barrier. The optimized La-Cu x O-2 catalyst (La/Cu = 0.224) achieves a 45.2% C 2 H 4 Faradaic efficiency (FE) and 75.4% C 2+ FE at −0.8 V RHE , with partial current densities of 87.5 and 146.7 mA cm −2 , respectively, surpassing undoped Cu x O. Remarkably, it retains more than 90% initial activity after 24 h operation, demonstrating exceptional stability. This work provides a rational strategy for stabilizing Cu + and tailoring pathways via rare-earth doping. Graphical La doping stabilizes Cu + /Cu 0 interfaces via electronic modulation and lattice distortion, enhancing grain boundary density in Cu x O catalysts for efficient CO 2 electroreduction. The optimized La-Cu x O-2 achieves 75.4% C 2+ Faradaic efficiency and 146.7 mA cm −2 partial current density at −0.8 V versus reversible hydrogen electrode, suppressing hydrogen evolution and enabling scalable CO 2 -to-C 2+ conversion.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huanqin Yu,Ting Liu,Chen Li,Beilei Yuan,Jinbiao Jia,Bingqiang Cao
Overcoming the toxicity of organic–inorganic perovskite materials is one of the main challenges in applying them to commercial optoelectronic devices, despite the amazing power conversion efficiency (PCE) of organic–inorganic hybrid perovskite solar cells (PSCs). In this work, we demonstrate a low-toxicity Pb-Cu alloyed perovskite film prepared by simple two-step methods and its integration in inverted PSCs. The formation of iodine defects was suppressed through the hydrogen bonding of guanidinium (Gua) cation (CH 6 N 3 + ), which greatly improves the quality of the film. It is demonstrated that introduction of GuaI additives leads to stronger photoluminescence (PL) intensity, and lower defects state density. The open circuit voltage (Voc) and PCE of Pb-Cu alloyed PSCs reached 0.95 V and 9.69%, respectively. This work helps to guide the preparation of efficient low-toxicity Pb-Cu alloyed optoelectronic devices.
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高影响因子
FUEL
·
2021
·
IF 6.609
Dawang Chu,Zhicheng Luo,Yingying Xin,Chengzhen Jiang,Shaofeng Gao,Zhihao Wang,Chen Zhao
The chemo-catalytic production of ethanol from nonedible lignocellulosic biomass is essential for mitigating energy shortage. In this work, we developed a multifunctional Pd-Cu-WO x /SiO 2 catalyst for the one-pot aqueous-phase conversion of cornstalk-derived cellulose to ethanol with a yield of 42.5C% at 300 °C and 4 MPa H 2 . Kinetic studies demonstrated that the transformation of cellulose to ethanol followed a number of consecutive steps namely, cellulose hydrolysis to glucose with H + in hot water (k 1 ), glucose conversion to glycolaldehyde over W species (k 2 ), glycolaldehyde hydrogenation to ethylene glycerol (EG) over Pd (k 3 ), and EG hydrogenolysis to ethanol over Cu (k 4 , rate-determining step). The individual rates were well balanced on Pd, Cu, and WO x species to achieve an ethanol formation rate of 0.163 g·g Cat . −1 h −1 . The addition of Au to Cu-WO x species led to a relatively low k 3 and thus the formation of a substantial amount of humins, while the Ru introduction catalyzed the over-hydrogenolysis of ethanol to methane and ethane with a high rate, thereby lowering the selectivity to ethanol. The characterization results showed that both the electronic properties of Cu + species and the Cu + /Cu 0 ratio on the Pd-Cu-WO x /SiO 2 catalyst contributed to a specific C O bond cleavage, especially for EG hydrogenolysis to ethanol during the cellulose conversion.
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