JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Long Liu,Zhi-Jun Zuo,Yue Du,Tingkai Wu,Jinting Wu,Jian Gao,Tiansheng Mu,Yong-Chao Zhang,Xiao-Dong Zhu
The electrochemical nitric oxide reduction reaction (NORR) is a promising green process for nitric oxide (NO) removal and ammonia (NH 3 ) synthesis. Among existing catalysts, copper (Cu) exhibits relatively high activity but is less stable and does not provide enough *H to further increase the NH 3 yield. In this study, a Cu/Fe 3 O 4 electrocatalyst with synergistic catalysis was synthesized. Cu contributes to NO activation and sequential hydrogenation, while Fe 3 O 4 promotes the decomposition of H 2 O to provide more *H and jointly promote NH 3 synthesis. The Cu/Fe 3 O 4 shows a high NH 3 yield of 347.5 ± 5.9 μmol h −1 cm −2 at −0.5 V vs. RHE and high Faraday efficiency (FE) of 95.8 ± 0.4 %, superior to most reported non-precious metal catalysts. Moreover, the catalyst activity was not attenuate after the 100 h stability test. The aqueous Zn-NO battery system demonstrates concurrent energy generation and ammonia synthesis capabilities, delivering a peak power output of 9.53 mW cm −2 alongside efficient NH 3 production with a yield of 595.7 ± 5.1 μg h −1 cm −2 .
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Advanced Optical Materials
·
2024
·Vol. 12
·期 23
·2400762
·
IF 8
Wentao Niu,Xiulin Xie,Zhong Chen,Ruixin Sun,Yu Li,Shuaibing Wang,Yu Zhang,Chunhe Yang,Aiwei Tang
Recently, I-III-VI type quantum dots (QDs) have attracted considerable attention in display technology due to their large-scale tunable emission and environmentally friendly characteristics. However, within this family, narrow-bandwidth Cu-based QDs have rarely been reported. Herein, the synthesis of narrow-bandwidth blue-emitting Cu-Ga-S (CGS)-based QDs is reported by a hot-injection method for the first time, boasting a narrow full width at half-maximum (FWHM) of 29 nm, closely approaching that of traditional Cd-based QDs. Through precisely controlling the temperature of nucleation stage, CGS-based QDs showcase a representative blue emission at 475 nm, featuring the narrowest FWHM and a photoluminescence quantum yield (PLQY) of 32%. Besides, the femtosecond transient fluorescence (fs-TA) characterization indicates that the narrow-bandwidth luminescence is attributed to band-to-hole recombination rather than donor-acceptor pair (DAP) recombination. The work opens a new avenue for narrow-bandwidth I-III-VI QDs, offering increased potential for applications in blue-light-emitting devices.
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Energies
·
2024
·Vol. 17
·期 6
·1449
·
IF 3
Qiong Li,Yu Wang,Ganghui Wei,Xiaorong Fang,Ni Lan,Yonggang Zhao,Qiming Liu,Shumei Lin,Deyan He
The preparation of composite carbon nanomaterials is one of the methods for improving the electrochemical performance of carbon-based electrode materials for supercapacitors. However, traditional preparation methods are complicated and time-consuming, and the binder also leads to an increase in impedance and a decrease in specific capacitance. Therefore, in this work, we reduced Ni-Cu nanoparticles on the surface of nitrogen-doped carbon nanofibers (CNFs) by employing an electrostatic spinning method combined with pre-oxidation and annealing treatments. At the same time, Ni-Cu nanoparticles were vulcanized to Ni–Cu–S nanoparticles without destroying the structure of the CNFs. The area-specific capacitance of the CNFs/Ni–Cu–S–300 electrode reaches 1208 mF cm−2at a current density of 1 mA cm−2, and the electrode has a good cycling stability with a capacitance retention rate of 76.5% after 5000 cycles. As a self-supporting electrode, this electrode can avoid the problem of the poor adhesion of electrode materials and the low utilization of active materials due to the inactivity of the binder and conductive agent in conventional collector electrodes, so it has excellent potential for application.
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JOURNAL OF THE ENERGY INSTITUTE
·
2024
·
IF 5.6
Zheng Bo,Mengyu Cao,Yaolin Wang,Jianhua Yan,Kefa Cen,Xin Tu
Plasma catalytic CO 2 hydrogenation has emerged as a promising approach for converting CO 2 into valuable chemicals such as CO, offering a potential solution to mitigate greenhouse gas emissions. In this study, we investigate the synergistic effect between plasma and a Cu/Ti 3 C 2 T x MXene catalyst for CO 2 hydrogenation via the reverse water gas shift (RWGS) reaction in a dielectric barrier discharge (DBD) reactor. Our findings reveal a significant enhancement in CO 2 conversion (33.1%) and CO yield (31.9%) when using the Cu/Ti 3 C 2 T x catalyst compared to plasma alone or with a Ti 3 C 2 T x foam. Plasma treatment creates unsaturated Ti sites on the Ti 3 C 2 T x surface, dramatically improving CO 2 adsorption and activation, while Cu nanoparticles significantly enhances the activation and dissociation of H 2 molecules on the catalyst surface. These surface adsorbed hydrogen species readily hydrogenate adsorbed CO 2 molecules through the Langmuir-Hinshelwood mechanism. Furthermore, these surface hydrogen species can also participate in the conversion of gas-phase CO 2 molecules through the Eley-Rideal pathway. This work sheds light on the synergistic plasma catalytic mechanism and provide insights for optimizing CO 2 hydrogenation processes using MXene catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xingyue Yang,Lei Wang,Shijie Zhou,Shilong Zhang,Yongfang Xu,Yujie Bian,Zhaowei Tian,Yusen Yang,Min Wei
Liquid organic hydrogen carriers (LOHC), which involve reversible catalytic hydrogenation/dehydrogenation cycles, have attracted considerable attention. This study investigates Cu/CuAlO x catalysts with unique Cu 0 –Cu + interfacial sites, which are prepared via structural topological transformation of layered double hydroxide (LDH) precursors. The optimized Cu/CuAlO x catalysts exhibit exceptional catalytic activity in 1,2,3,4-tetrahydroquinoline (THQ) dehydrogenation, achieving a complete conversion of THQ within 1.5 h and a turnover frequency (TOF) value amounts to 19.94 h −1 at 150 °C, which stands at the highest echelon compared with previously reported heterogeneous catalysts. Furthermore, the catalyst also exhibits excellent performance in quinoline hydrogenation (yield >99 %) after 6 h at 60 °C, and the TOF value reaches up to 7.01 h −1 . A comprehensive investigation based on XPS, TEM and XAFS verifies the dual active states Cu 0 and Cu + sites coexisting on nanoparticle surfaces. Both experimental studies ( in situ DRIFTS and XPS) and DFT calculations reveal the pivotal role of the Cu 0 − Cu + synergistic effect in dictating catalytic behavior: the Cu + species preferentially adsorb and activate the N − H bonds and C − H bonds in N-heterocycles; Whereas the Cu 0 site facilitates efficient reassociation of surface adsorbed H atoms and product desorption (H 2 ). This work exhibits substantial potential for implementation in hydrogen storage technologies, offering a viable pathway towards efficient LOHC utilization in clean energy systems.
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CARBON
·
2024
·
IF 10.5
Congli Zhou,Fangzhu Qing,Xiao Sun,Rongxuan Wu,Haodong Wang,Qiye Wen,Xuesong Li
Cu particles are limited in their applications due to their susceptibility to oxidation. Here we report a cost-effective method for producing Cu particles with oxidation resistance. By heating the mixture of basic cupric carbonate and glucose powders, Cu particles coated with amorphous carbon were achieved. The amorphous carbon was then converted into graphene through flash joule heating (FJH). The conductivity of the final product was 47.1 S/cm after FJH, which remained as 42.3 S/cm even after in hot air for 30 min, i.e., 89.8% conductivity retention. The product was demonstrated for the application of electromagnetic interference (EMI) shielding with an average EMI shielding effectiveness of 12.3 dB and 11.7 dB before and after oxidizing treatment, respectively.
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Materials Today Communications
·
2024
·
IF 3.7
Hanqing Zhao,Lingyu Meng,Feiyu Wang,Irfan,Ming Hu
Powder preparation is the key step in producing laser cladding coatings with desired properties. In this paper, quaternary TiO 2 -B 4 C-C-Cu composite powder with high sphericity and good densification has been successfully prepared by a powder fabrication process combining spray granulation with densification sintering. The effects of slurry characteristics, spray granulation process parameters, and densification sintering temperature on particle morphology and performance were studied. The formation mechanism of quaternary spherical TiO 2 -B 4 C-C-Cu composite powder was revealed by analyzing the process of heat transfer and water transfer in the droplets, and the optimization direction of the powder preparation was indicated. The optimized process parameters for the quaternary spherical TiO 2 -B 4 C-C-Cu composite powder are: slurry solid content of 52 wt%, dispersant content of 1.25 wt%, binder content of 2 wt%, inlet temperature of 180 °C, the airflow rate of 310 L/h, slurry feed rate of 4.5 ml/min, and the two-stage temperatures of densification sintering are 500 ℃ and 900 ℃ for 1 h, in turn. Under the optimized process, the fluidity of the powder reaches 112 s/50 g, the apparent density reaches 1.2 g/ml, and more than 70% of the particles are between 15–53 µm. The powder has been verified by laser cladding to prepare in-situ synthesized TiB 2 -TiC-Cu composite coatings , which could have a better prospect for potential application.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jiaqi Wang,Shuangjun Li,Jingjing Zhao,Kaihong Liu,Bo Jiang,Hexing Li
Photothermal catalysis of CO 2 hydrogenation holds great potential in achieving carbon neutrality . However, the rational design of cost-effective photothermal catalysts with high performance for CO 2 hydrogenation is an ongoing challenge. Herein, we employed CuCo y BOₓ composite catalysts by incorporating both CuBOₓ and amorphous CoBOₓ to efficiently catalyze the CO 2 hydrogenation. Besides the high selectivity (98.0%), the optimized CuCo 5 BO x demonstrated a remarkable CO yield of 124.7 mmol g⁻¹ h⁻¹ under illumination at 300°C, which was 3 times higher than the traditional thermocatalysis. Experimental results and theoretical calculations demonstrated CuBOₓ acted as a photocatalyst , donating electrons to CoBOₓ active sites. Coupling boron-oxygen species with CuCo bimetallic-oxides synergically enhanced the CO 2 adsorption capacity and accelerated charge transfer, thereby enhancing the photothermal synergistic effect and consequently boosting the catalytic activity. This study establishes an approach for the rational design of non-precious metal-boride catalysts, enabling efficient photothermal conversion of CO 2 into CO under mild conditions.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Zailun Liu,Yunfei Ma,Junqing Li,Ying Tu,Hui Yang,Kelin He,Chao Chen,Yulin Wang,Xiang Lin,Hongli Sun,Chenliang Su,Qitao Zhang
Uncovering the excitation processes of photocatalysts and enhancing the dissociation of excitons into free photogenerated electrons and holes for photocatalytic CO 2 reduction is imperative yet quite challenging. Herein, an efficient strategy of reducing the binding energy of excitons to boost exciton dissociation is reported by anchoring the low valence single-atom Cu sites in In 2 S 3 nanosheets (Cu-In 2 S 3 ), which can enhance photocatalytic CO 2 reduction activity. The investigations of photo-irradiated Kelvin probe force microscopy (KPFM), in situ irradiates X-ray photoelectron spectroscopy (XPS), and temperature-dependent photoluminescence (TD-PL) indicate that the doping of low valence single-atom Cu can efficiently drive the charge transfer and separation. Moreover, the studies of the dynamic behaviors of charge carriers by femtosecond time-resolved spectroscopy (fs-TAS) reveal that the doping of low valence Cu single-atom sites allows the promotion of exciton dissociation by reducing the binding energy of the exciton, resulting in an enhanced photocatalytic CO 2 reduction of Cu-In 2 S 3 nanosheets. The aforementioned strategy for enhancing the dissociation efficiency of excitons in photocatalysts will offer a highly efficient and promising approach for the photocatalytic CO 2 reduction and other photocatalytic applications.
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Science Bulletin
·
2025
·
IF 21.1
Wanguo Gao,Zhe Lu,Yecheng Leng,Chengyang Wu,Yingfang Yao,Xi Zhu,Junchuan Sun,Xiwen Yu,Cheng Wang,Congping Wu,Wenlei Wu,Bing Wang,Lu Wang,Zhigang Zou
Cu-based catalysts attract considerable attention because of their exceptional CO 2 photo-/electro-/thermo-reduction capacities, where Cu(I) is generally treated as the active species. However, a significant problem hindering the large-scale applications of Cu-based catalysts is the inactivation of Cu(I) via irreversible redox to Cu(II)/Cu(0). This study proposes a Cu(I) valence pinning method based on hydroxyapatite (HAP). Experimental and theoretical studies demonstrate that the phonon resonance among the Cu(I) ions, their adjacent heteroatoms, and the intermediates adsorbed at the Cu(I) sites yields Cu(I) valence electrons in their lowest energy states. Thus, Cu(I) is stabilized, stable, and efficient photothermal CO 2 hydrogenation is promoted. However, because of the change of Cu(I) coordination environment during the CO 2 hydrogenation reaction, Cu(I) ions migrate into the bulk phase, leading to activity attenuation. Nevertheless, Cu(I) ions can be pulled out to the surface of HAP under the oxidative humid air condition, and the catalytic activity can be easily recovered. Thus, we propose a simple cyclic reaction/regeneration process. This enables the Ca 5 (FeCuCe) 5 -HAP catalyst to achieve the CO yield of 402.8 mmol g −1 h −1 and a CO 2 conversion rate of 27.7%, which is close to the thermodynamic equilibrium. This catalyst also displays a selectivity of approximately 100% and cycle stability of 156 h at 500 °C under a pressure of 1 atmospheric. Our study provides a viable method for the scale applications of Cu(I) based catalysts in the “negative carbon” industries.
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Matter
·
2023
·
IF 18.9
Qiang Hou,Wei Wei,Xin Zhou,Xinyue Wang,Tony Wang,Yue Sun,Zhixiang Shi
Cu-doped apatite Pb 10− x Cu x (PO 4 ) 6 O was synthesized. The crystal structure and composition were determined using X-ray diffraction and energy dispersive X-ray spectroscopy. Both the primary phase and impurities have been successfully identified. We performed temperature-dependent resistivity measurements on the synthesized Pb 10− x Cu x (PO 4 ) 6 O samples. Remarkably, four distinct types of resistivity behaviors were observed in one sample. Following a thorough compositional analysis, we proposed a current percolation model, based on the formation of a Cu/Pb current channel, to elucidate the observed special resistivity behaviors. It is important to note that the Meissner effect was not observed in our magnetization measurements. Consequently, we reached the conclusion that the presence of superconductivity in Cu-doped apatite has yet to be substantiated.
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Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Jianhui Gao,Deliang Liu,Zhiqiang Lin,ZhouYang,Zhuojun He,Xiafei Dai,Pengfei Zhao,Hongzhou Lu,Mingbin Zheng
Respiratory pathogens transmitted via clinical textiles represent a major source of hospital-acquired infections, yet current antibacterial fabric strategies are limited by poor durability and weak bacterial inhibition. Here, we reported a molecular-level strategy for the fabrication of copper-doped antibacterial cotton textiles (Cu@textile) via a simple immersion of common cotton in a Cu(II)- saturated NaOH solution. This process enabled stable coordination between the copper ions and cellulose hydroxyl groups, forming stable Cu-O bonds throughout the fiber matrix. Structural and spectroscopic analyses confirmed uniform copper integration and chemical bonding. The resulting Cu@textile exhibited potent, broad-spectrum antibacterial activity against key respiratory pathogens, including Pseudomonas aeruginosa, Acinetobacter baumannii, and Mycobacterium tuberculosis, with > 99% sterilization efficiency. Mechanistic studies revealed this efficacy as copper-induced reactive oxygen species (ROS) production and bacterial membrane disruption. This accessible and scalable antimicrobial textile eliminates the need for specialized equipment or nanoparticle synthesis, and may represent a strategic intervention to reduce bacteria propagation and contact infection risks in healthcare settings.
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