Journal of Physical Chemistry C
·
2020
·
IF 4.189
Abubakar Yusuf,Yong Sun,Yong Ren,Colin Snape,Chengjun Wang,Hongpeng Jia,Jun He
Defect engineering is an effective strategy to enhance the activity of catalysts for various applications. Herein, it was demonstrated that in addition to enhancing surface properties via doping, the influence of dopants on the surface–intermediate interaction is a critical parameter that impacts the catalytic activity of doped catalysts for low-temperature formaldehyde (HCHO) oxidation. The incorporation of Co into the lattice structure of δ-MnO2 led to the generation of oxygen vacancies, which promoted the formation of surface active oxygen species, reduced activation energy, and enhanced catalytic activity for low-temperature oxidation of HCHO. On the contrary, Cu doping led to a drastic suppression of the catalytic activity of δ-MnO2, despite its enhanced redox properties and slight increase in the surface concentration of active oxygen species, compared to pristine δ-MnO2. Diffuse reflectance infrared Fourier transform analysis revealed that in the presence of Cu, carbonate intermediate species accumulate on the surface of the catalysts, leading to partial blockage of active sites and suppression of catalytic activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Chengbao Zhou,Shuyun Wan,Yucheng Chen,LiKang Fu,HongYi Chen,Chenxia Kang,Qiming Liu
Owing to high theoretical capacity, nickel sulfides are competitive anode materials for sodium-ion batteries (SIBs). Nevertheless, their developments are greatly obstructed by low conductivity, as well as poor cycle stability resulted from structural pulverization and collapse. Herein, dispersed Ni 3 S 2 nanoparticles (20–30 nm) are encased in carbon shells (NiS x @C) through a simple hydrothermal reaction and carbon coating process . The dispersed nanoparticles provide short ion transport channels and a large number of active sites for sodium storage, and carbon coating can enhance the conductivity and structural stability of materials. Meanwhile a small amount of copper is added to further increase the capacity of materials based on synergistic effect and increase of defects. The Cu 2 S/NiS x @C composite electrode exhibits an outstanding pseudocapacitive behavior in reaction kinetics. Evaluated as an anode for SIBs, such electrode performs a high rate capability of 343.8 mAh g −1 at 5 A g −1 and excellent cycling performance of 485.3 mAh g −1 at 0.1 A g −1 after 100 cycles and 350.4 mAh g −1 at 0.5 A g −1 after 500 cycles. This work shows that nickel sulfides are promising materials for sodium-ion storage through structural design and modification, and would be of great significance to promote the development of advanced SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yang Yuan,Junhong Ma,Chaoyun Ma,Xuye Zhou,Yikun Zhou
Aqueous zinc-ion batteries (AZIBs) have garnered wide attention due to their notable safety, cost-effectiveness, and environmental sustainability. Cathode material is pivotal in dictating the performance of AZIBs, yet the development of high-performing cathode materials is a formidable challenge. Herein, we design and fabricate the Cu-doped MnO 2 nanoparticles riveted onto carbon nanofibers (CNFs) as cathode materials. On the one hand, the introduction of CNF and Cu 2+ promotes the conductivity and the generation of defect structures, which augments the intrinsic pseudocapacitance. On the other hand, nanoscale MnO 2 provides abundant exposed active sites, thereby amplifying the extrinsic pseudocapacitive effect. This unique structure combines both intrinsic and extrinsic pseudocapacitive effects, effectively harnessing the rapid response advantage at the surface layer. Additionally, the introduction of CNF and Cu 2+ in MnO 2 boosts the ion diffusion capability. In synergy with these effects, the optimized 10C-MO-Cu exhibits a high discharge specific capacity of 442 mAh g −1 at 0.1 A g −1 , and a decent capacity retention of 80 % after 750 cycles at 1 A g −1 . Furthermore, the zinc ions storage mechanism is elucidated through ex-situ X-ray diffraction and X-ray photoelectron spectroscopy techniques. This work provides a novel perspective to constructing efficient cathode materials for AZIBs with high performance.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Jing Jiang,Yao Tian,Jiayi Zhang,Chenghui Zhang,Lunhong Ai
Development of multifunctional non-noble electrocatalysts for seawater electrolysis is imperative but still challenging for scale-up hydrogen production to avoid harmful chlorine chemistry. Herein, the metallic Cu-incorporated NiFe layered double hydroxide (LDH) nanosheets are prepared by a facile consecutive corrosion strategy using iron foam (IF) as a reactive substrate, which enable the corrosion-resistant and chlorine-free seawater electrolysis combined with anodic sulfion oxidation for energy-efficient hydrogen production at ultralow electricity consumption. The NiFe-LDH/Cu-IF exhibits excellent electrocatalytic activities for hydrogen evolution reaction (HER) and sulfion oxidation reaction (SOR), achieving low potentials of 0.203 and 0.310 V (vs RHE) at 100 mA cm −2 in alkaline seawater, respectively. The assembled hybrid HER||SOR seawater electrolyzer realizes the ultra-low cell voltage of 0.619 V and power consumption of 1.48 kWh/m 3 H 2 at 50 mA cm −2 , cutting energy consumption over 67 % compared to conventional seawater electrolysis.
研究领域:
材料科学
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能源化学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Qianyi Wang,Wan Yu,Wenjun Xu,Zhen Li,Xiren Xia,Yin Xu
Doping strategies are widely employed to enhance the catalytic activity of perovskites for peroxymonosulfate (PMS) activation in removing organic pollutants in water. However, limited research has explored the performance enhancement and underlying mechanism associated with trace doping, which is particularly important for saving dopant metals and cost, and also lower the risk of metal ion loss. In this study, we investigated the profound effects of trace copper doping in LaMnO 3 on PMS activation for contaminant removal. Compared to pristine LaMnO 3 , the catalytic oxidation performance was significantly enhanced by trace copper doping (1.3 wt% Cu), achieving over 91.0 % removal of acid orange 7 (AO7) within 45 min using the LaMn 0.95 Cu 0.05 O 3 (LMC5)/PMS system. Comprehensive characterizations revealed that copper incorporation primarily fortified the redox ability and electron transfer efficiency of LaMnO 3 , thereby improving its catalytic efficacy. Furthermore, unlike previous studies reporting on radical oxidation mechanisms, the surface PMS* complexes with Mn(III) serving as the active sites were identified as the predominant reactive species responsible for pollutant degradation. The intermediates of pollutant degradation were identified and their toxicity was also assessed by ECOSAR program. The system's practical feasibility was further underscored by treating diverse contaminants and evaluating the interference of coexisting anions in water. Briefly, this study provides valuable insights into enhancing the catalytic activity of perovskites for PMS activation in water treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 4
·431
·
IF 2.9
Kaili Wang,Li Fan,Hongliang Zhu,Hao Liu,Yuxuan Wang,Shancheng Yan
In important applications, thermoelectric technology has been widely applied for precise temperature control in intelligent electronics. This work synthesized and characterized low-content copper-doped SnSe thermoelectric catalysts using an easy and effective hydrothermal method. It was discovered that doping increased the crystal plane spacing of SnSe, increased the carrier concentration, and improved the thermoelectric properties. The best degradation was attained at x = 0.0025. The thermoelectric degradation performance of low-dose copper-doped tin selenide Sn1−xCuxSe (x = 0, 0.0005, 0.001, 0.0015, 0.002, 0.0025, 0.003), for the degradation of methylene blue from organic wastewater at 75 °C, was examined. Our research indicates that by using this approach, we can create more high-performance catalysts.
研究领域:
材料科学
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环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Zhibao Wang,Hanqing Gu,Zhanyu Li
Vanadium oxide cathode materials in aqueous aluminum-ion batteries (AAIBs) have an exceptional potential for development because of their high valence and fast electron transfer capability. However, the strong electron–electron Coulomb repulsion in vanadium and its associated electrostatic interactions severely hinder the feasibility of vanadium oxides in AAIBs. The glucose-assisted hydrothermal reduction of monoclinic VO 2 combined with Cu ion doping effectively promotes the self-assembly of VO 2 into nanoflower architectures, enabling precise control over morphology and crystalline structure. When integrated with a 5 m Al(OTF) 3 electrolyte and an Ionic liquid （IL ）-treated Al sheet anode, this full battery demonstrates outstanding electrochemical performance, achieving an initial discharge capacity of 642 mAh·g −1 at 0.4 A·g −1 . Moreover, introducing Cu 3d orbitals effectively enhances the hybridization and electronic coupling effects between the V 3d and O 2p orbitals. Ex situ characterization and diffusion kinetic provide insights into the embedding/de-embedding mechanism of Al 3+ . This work significantly improves the application potential of VO 2 in AAIBs through structural optimization and mechanism studies and provides systematic scientific guidance for the development of vanadium oxide cathode materials.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2025
·
IF 10.9
Tiantian Yan,Bachirou Guene Lougou,Boxi Geng,Boshu Jiang,Danni Ma,Shuo Zhang,Azeem Mustafa,Wei Wang,Achraf Ghorbal,Piotr Łapka,Yong Shuai
Thermochemical energy storage offers high energy density and efficiency for concentrated solar power systems, making it a promising solution for sustainable energy storage. Cobalt oxide is particularly attractive for thermochemical energy storage due to its high energy storage capacity and excellent cycling stability. However, its performance is limited by redox thermal hysteresis and a significant temperature gap between reduction and oxidation processes. To address these challenges, this study investigates the effect of copper, manganese, and iron doping on cobalt oxide to enhance its solar light absorption and energy storage properties. The doped compounds were synthesized using the sol–gel method and thoroughly characterized using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry, and ultraviolet–visible spectroscopy. Key performance metrics, including oxygen storage capacity, energy storage density, and redox thermal hysteresis, were systematically analyzed. Among the tested materials, copper doping at x = 0.5 was most effective, reducing thermal hysteresis from 37 ℃ to 28 ℃ and enhancing solar absorption by 78 %. These improvements are attributed to increased oxygen vacancies and modified cation valence states, which enhance redox kinetics and light-harvesting efficiency. Additionally, the copper-doped cobalt oxide demonstrated excellent cycling stability over 20 redox cycles, highlighting its potential for high-efficiency thermochemical energy storage applications. This study provides valuable insights into the design and optimization of advanced thermochemical energy storage materials, contributing to the development of next-generation renewable energy storage technologies.
研究领域:
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Results in Chemistry
·
2025
·
IF 4.2
JianGuo Huang,Rashid Khan,Chunhui Zhai,Xianting Ding,Li-Sha Zhang,Jin-Ming Wu,Zhizhen Ye
The development of efficient disinfection techniques that can persistently eradicate viruses or disrupt their transmission is of paramount significance for curbing the spread of pandemics. Existing disinfection techniques commonly suffer from secondary pollution and difficulty in achieving continuous disinfection while ensuring safety and effectiveness, particularly in crowded environments. In this study, we adopted ozone synergistic catalytic oxidation (OSCO) technology for the highly efficient disinfection of bacteria and viruses. The OSCO route is based on the catalytic decomposition of ozone into active radicals in the presence of an optimized rod-like Cu/MnO 2 catalyst. The high catalytic activity of the Cu-doped MnO 2 catalyst can be attributed to the presence of numerous oxygen vacancies, which facilitate the catalytic decomposition of ozone into active radicals. This method serves multiple purposes, including the eradication of bacteria and viruses as well as the prompt decomposition of ozone to prevent any potential leakage. A disinfection rate of 99.9 % for both Staphylococcus albicans and H1N1 viruses was achieved within 20 min. The catalyst also demonstrated exceptional efficiency in degrading residual ozone, achieving a high removal rate of 99.99 % within 25 min, thus assuring safe disinfection. Density functional theory (DFT) calculations further supported that Cu doping induced lattice defects in MnO 2 , promoting the formation of interfacial oxygen vacancies and in turn favoring the catalytic oxidation process. The current OSCO technology offers a highly efficient and secure disinfection method with a wide range of potential applications in various fields.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2020
·Vol. 5
·期 8
·2000260
·
IF 5.969
Zhiyong Liu,Xingyue Liu,Bo Sun,Xianhua Tan,Haibo Ye,Jianxin Zhou,Zirong Tang,Tielin Shi,Guanglan Liao
Photodetectors are essential parts of wireless optical communication system for obtaining high fidelity signal transmission, which mainly relies on expensive and energy-consuming Si, GaN, and InGaAs based photodiodes. The emerging organic–inorganic metal halide perovskite materials, with the merits of low-cost, strong optical absorption, superior charge transport, and so on, are widely investigated in photodetection applications. Herein, a Cu ion induced p-type doping strategy for perovskite film is proposed to facilitate hole transport, passivate trap states, avoid charge accumulation, and suppress recombination of photogenerated carriers, contributing to an enhanced photoelectric performance for self-powered hole-conductor-free devices. The optimal device shows a highest responsivity of 0.37 A W −1 , detectivity of 1.06 × 10 12 Jones, linear dynamic range of over 101 dB, and an ultimate photoresponse rate approaching 5 µs. Moreover, an optical communication system integrated with the perovskite photodetector as light signal receiver for transmitting digital signals is demonstrated, in which characters can be transmitted accurately, and audio signal is recovered with high fidelity. The results suggest that with proper chemical modification, perovskite materials are promising alternative to inorganic semiconductors for efficient photodetection in advanced integrated optical communication system.
研究领域:
材料科学
·
光学工程
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2021
·Vol. 146
·期 13
·4280-4289
·
IF 4.616
Jinyan Du,Shuangqing Qi,Tingting Fan,Ying Yang,Chaofeng Wang,Qin Shu,Shujuan Zhuo,Changqing Zhu
Herein, a simple and facile one-step hydrothermal carbonization synthesis procedure for the fabrication of N, Cu-doped carbon quantum dots (N, Cu-CQDs) as a peroxidase-mimicking enzyme was reported. The peroxidase-like performance of N, Cu-CQDs was assessed based on the oxidative coupling reaction of phenol with 4-aminoantipyrine (4-AAP) in the presence of hydrogen peroxide (H2O2). The N, Cu-CQDs/4-AAP/H2O2 system was applied to sensing phenol based on double signals of absorption spectra (or colorimetric visualization) as well as fluorescence spectra. The obtained limits of detection (LODs) were as low as 0.12 μM and 0.02 μM, respectively. Moreover, the proposed method was successfully applied to the determination of phenol in sewage with satisfactory recovery. Our results demonstrate that the N, Cu-CQDs/4-AAP/H2O2/phenol sensing system has a great potential prospect for applications in environmental chemistry and biotechnology.
研究领域:
环境化学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Anjie Wang,Anjun Huang,Heping Zhao,Yue Liu,Yuxia Luo,Dacheng Zhou,Zhiguo Song,Jianbei Qiu,Cherkasova Tatiana,Zhengwen Yang
Transparent glass is a promising candidate for optical storage media due to its large capacity and high stability advantages. Previously reported optical storage glass systems meet various problems, such as high manufacturing costs, low security levels, etc. Herein, a kind of copper-contained borate glass was designed and fabricated, emitting tunable broadband upon various ultraviolet light excitations. By alternating 360 nm laser (10.7 W/cm 2 ) irradiation for 15 s and thermal treatment at 400 ℃ for 2 h, the emission intensity of the glass can be reversibly regulated, which is associated with the variation of oxidation states of the copper element. Relying on their efficient reversible luminescence modulation behaviors, the potential application of this glass as an optical storage and encryption media is developed, exhibiting the high performances of repeatable writing and erasing, dual mode readout, high-level safety, and good writing resolution for the Cu-doped borate glass.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）