Journal of Environmental Sciences
·
2023
·
IF 6.9
Songjin Ko,Xiaolong Tang,Fengyu Gao,Honghong Yi,Hengheng Liu,Ning Luo
In this work, the phosphomolybdate (HPMo) modification strategy was applied to improve the N 2 selectivity of MnCo-BTC@SiO 2 catalyst for the selective catalytic reduction of NO x , and further, the mechanism of HPMo modification on enhanced catalytic performance was explored. Among MnCo-BTC@SiO 2 -x catalysts with different HPMo concentrations, MnCo-BTC@SiO 2 -0.75 catalyst exhibited not only the highest NH 3 -SCR performance (∼95% at 200-300°C) but also the best N 2 selectivity (exceed 80% at 100-300°C) due to the appropriate redox capacity, greater surface acidity. X-ray photoelectron spectrometer (XPS) and temperature programmed reduction of H 2 (H 2 -TPR) results showed that the modification with HPMo reduced the oxidation-reduction performance of the catalyst due to electron transfer from Mo 5+ to Mn 4+ /Mn 3+ and prevent the excessive oxidation of ammonia adsorption species. NH 3 temperature-programmed desorption of (NH 3 -TPD) results showed that the modification with HPMo could significantly improve the surface acidity and NH 3 adsorption, which enhance the catalytic activity and N 2 selectivity. In-situ diffused reflectance infrared Fourier transform spectroscopy (in-situ DRIFTS) revealed that modification with HPMo increased significantly the amount of adsorbed NH 3 species on the Bronsted acid site and C B / C L , it suppressed the production of N 2 O by inhibiting the production of NH species, the deep dehydrogenation of ammonia adsorption species. This study provided a simple design strategy for the catalyst to improve the low-temperature catalytic performance and N 2 selectivity.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xue Bai,Liyin Bu,Yongqiang Du,Quan Wang
Owing to the internal correction function and good resistance to complex factors, dual-signal electrochemical sensors have abilities to avoid false positives. In this work, Cu-MOF and MnCO 3 were combined and further prepared the Cu 2+ and Hg 2+ dual-signal electrochemical sensor for ultra-sensitive detection of Hg 2+ . Notably, beyond the commonness of the general MOFs, Cu-MOF could undergo oxidation–reduction to provide an internal reference signal. MnCO 3 , a porous structure with good electrocatalysis, exhibits an obvious signal amplification effect on the detection of Hg 2+ . Differential pulse voltammetry was applied for the detection of Hg 2+ . The current signal of Cu 2+ and Hg 2+ reduced regularly with Hg 2+ concentration decreased. Under optimized conditions, the LOD of Hg 2+ was calculated around 6.82 nM with a linear range of 0.10 ∼ 2.50 μM. The proposed sensor was proven to show satisfactory anti-interference, stability, and reliability, which is promising for the ultra-sensitive detection of Hg 2+ in real life.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yong Lai,Zhenzhen Sun,Hantao Wen,Hanming Ding
Fenton-like technology is an eco-friendly and efficient method to degrade organic contaminants. Herein, a bimetallic catalyst with high catalytic activity was obtained by anchoring Co and Mn on N-doped carbon materials (MnCo/N-C) through a one-step pyrolysis process. Peroxymonosulfate (PMS) was activated by cobalt nanoparticles, nitrogen-coordinated metal atoms, and defect sites in MnCo/N-C to produce several reactive species, including SO 4 •– , 1 O 2 , O 2 •– , and •OH. The catalyst showed high activity and excellent stability during the catalytic processes. The degradation of 50 mL of rhodamine B solution with a concentration of 0.03 g/L was almost completed in only five minutes by using 0.1 g/L of the catalyst and 0.2 g/L of PMS. Furthermore, the catalyst could be used over a wide pH range of 3–11. Overall, this work provides a simple approach to preparing a more effective and long-lasting Fenton-like catalyst for the degradation of organic contaminants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wenbo Li,Difei Xiao,Xueqin Gong,Xianbin Xu,Fahao Ma,Zeyan Wang,Peng Wang,Yuanyuan Liu,Ying Dai,Zhaoke Zheng,Yuchen Fan,Baibiao Huang
Electrocatalytic polyethylene terephthalate (PET) waste upgrading is crucial for developing a circular plastics economy and solving the energy crisis, but achieving efficient PET upgrading at an industrial-scale current density remains a formidable challenge. In our work, Ni-MOF@MnCo-OH catalyst was prepared by designing hierarchical heterostructure and incorporating the concept of multi-metal sites, wherein the Ni-MOF can be derived from PET plastic. Benefiting from the advantages of material design, the catalyst demonstrates excellent adsorption capabilities for both OH ad and ethylene glycol (EG), while also enhancing the electron transfer capability of Ni-MOF. We achieve a high Faradaic efficiency (∼80 %) during PET plastic upgrading at industrial-scale current density (300 mA·cm −2 at 1.43 V vs. RHE) with Ni-MOF@MnCo-OH. Moreover, through theoretical calculations and in situ Fourier transform infrared (FTIR) spectroscopy, we have further elucidated the mechanism of ethylene glycol oxidation reaction (EGOR). Notably, glycolic acid has been identified as a vital intermediate during the electrical oxidation of EG. This work provides a viable and eco-friendly approach to enhance the value of PET waste through sustainable means.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 43
·2004614
·
IF 11.459
Xian Wang,Anrui Dong,Ziyi Zhu,Lulu Chai,Junyang Ding,Li Zhong,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
In the preparation of nanomaterials, the kinetics and thermodynamics in the reaction can significantly affect the structures and phases of nanocrystals. Therefore, people are keen to adopt various synthetic strategies to accurately assemble the target nanocrystals, and reveal the underlying mechanism of the formation of specific structures. In this work, the total reaction time is adjusted to let the prepared MnCo Prussian blue analogous (MnCoPBA) crystals show four evolving morphological changes at different stages with the assistance of sodium dodecyl sulfate. Furthermore, it is clearly observed that the epitaxial growth along the (100) plane on the shell of MnCoPBA nanocrystals is favored, and the thermodynamics and kinetics in the morphology change process are analyzed in detail. Through the simple pyrolysis, MnCoPBA crystals can be successfully converted into the corresponding carbon composites, of which Mn 2 Co 2 C nanoparticles are evenly distributed in highly graphitized carbon matrix. Among them, PBA-III-700 performs good oxygen reduction reaction performance in alkaline solution with the half-wave potential of 0.801 V and diffusion-limited current density of 5.36 mA cm −2 , and its zinc-air battery exhibits the peak power density of 103.4 mW cm −2 competitive with commercial Pt/C.
研究领域:
材料化学
·
纳米科学与技术
·
电化学
·
能源材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Fuyu Chen,Zhongjie Wang,Xuhong Yin,Xiangdong Cheng,Qiang He,Hui Chen,Qinfang Zhang
The vanadium flow battery (VFB) has garnered significant attention for its potential to enable cost-effective utilization in large-scale energy storage. Nevertheless, the electrochemical activity of electrodes is limited during vanadium redox reactions, which poses a challenge to achieving high-performance VFBs. To address this, we synthesize a catalyst consisting of amorphous carbon, manganese oxide, and cobalt, to enhance VFB performance. Initially, bimetallic metal-organic frameworks with varying Mn Co ratios are synthesized using a hydrothermal method. Subsequently, the bimetallic metal-organic frameworks are carbonized to form the catalysts. The morphology, composition, electrocatalytic activity, and charging-discharging behavior of the prepared catalysts are then systematically investigated. This paper reveals that: i) the composite with a molar ratio of manganese to cobalt of 1:4, exhibits a uniform and fine particle distribution, an abundance of oxygen-containing functional groups, and exceptional electrochemical activities; ii) it enhances the energy efficiency of VFBs by 9 % compared to those utilizing raw carbon felts and by 5 % over those with mono-MnO@C or mono-Co@C electrodes at 100 mA cm −2 ; iii) it offers significant improvements in terms of operating voltages, cell capacities, high current density characteristics, and lifespan. Consequently, this work introduces a novel electrochemical catalyst for VFBs, enhancing their performance and broadening their potential applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2026
·
IF 2.7
Xinfeng Qian,Xin Wang,Hui Zhang,Dawei Hou,Linjun Yang
BACKGROUND Volatile organic compounds (VOCs) are key atmospheric pollutants causing haze and photochemical smog, with toxic and carcinogenic properties. Catalytic oxidation is a widely used industrial VOC abatement technology, but noble-metal catalysts are costly and easily deactivated, making non-noble-metal catalysts a promising alternative. Porous inserted catalytic oxidizer emerges as a novel advanced technology, and computational fluid dynamics (CFD) simulation is an essential tool for studying its flow and reaction characteristics. This study prepared MnCo@ CF porous-medium catalyst via a hydrothermal method, and investigated its catalytic performance and oxidation characteristics through experiments and CFD numerical simulation. RESULTS MnCo@ CF featured spinel MnCo₂O₄ as the primary active phase, with Cu derived from the copper foam substrate participating in catalysis and forming chestnut-like spherical nanostructures. This catalyst achieved 90% toluene conversion at 562 K, with an apparent activation energy of 85.1 kJ mol −1 , exhibiting superior performance to that of the single-metal counterparts Mn@ CF and Co@ CF . CFD simulations revealed intense turbulence and vortexes within the porous framework, with the turbulent kinetic energy reaching 2.054 × 10 −2 m 2 s −2 ; the VOC removal efficiency was merely approximately 0.2% at an inlet velocity of 0.21 m s −1 , whereas inlet temperature variations in the range of 273–373 K and inlet concentration fluctuations from 0.1 to 3 wt% exerted negligible effects on the catalytic process. CONCLUSION MnCo@ CF porous-medium catalyst was successfully synthesized in situ on copper foam via a hydrothermal method, showing excellent VOC catalytic oxidation activity with high toluene conversion at moderate temperatures. The porous framework has extensive internal vortex disturbances, leading to sharp spatial fluctuations of flow velocity, pressure, and turbulent kinetic energy, which are closely related to the solid skeleton distribution. Inlet flow velocity is the key factor affecting catalytic performance, while inlet temperature and concentration fluctuations within a certain range have relatively small impacts on the catalytic characteristics. © 2026 Society of Chemical Industry (SCI).
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Xue Zhang,Xuelei Tian,Chang Liu,Jing Qiao,Wei Liu,Jiurong Liu,Zhihui Zeng
Metal-organic frameworks (MOFs) have attracted more and more attentions for preparing electromagnetic wave (EMW) absorption materials because of the porous structure , high specific surface area, and designable configuration. Herein, a series of MOF-74 derived nanocomposites were synthesized by hydrothermal process and subsequent carbonization . The EMW absorption performance and the functions of each component were investigated in depth. Moreover, the inherent EMW absorption mechanisms were comprehensively revealed. Benefiting from the synergistic effect of constituents and microstructure, the MnCo-MOF-74 derived MnO/Co/C nanocomposites delivered a minimum reflection loss value of −68.89 dB at the thickness of 2.64 mm and an effective absorption band of 5.3 GHz at the thickness of 2.3 mm. The high EMW absorption performance was ascribed to the optimized impedance matching and multiple attenuation mechanisms including interfacial and dipole polarization loss, magnetic loss, conductive loss, and multiple scatterings capability. This study shed light on exploring high-efficiency MOF-based EMW absorption materials with rational design of components and structure.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2026
·
IF 13.6
Aguo Cheng,Yixin Yu,Jing Ding,Shuhao Sun,Peng Li,Rong Sun,Kelong Fan
Acute radiation proctitis (ARP) is a common complication of pelvic radiotherapy driven by direct DNA damage and excessive reactive oxygen species (ROS) induced oxidative stress. Currently, effective clinical treatments that can systematically intervene in ARP are lacking. In this study, we developed an injectable, multicenter cascade nanozyme gel (Ce–MnCo LDH gel) for intrarectal administration to combat radiation-induced intestinal injury. By atomically integrating cerium (Ce) into the lattice of manganese-cobalt layered double hydroxides (MnCo LDH), we constructed a complex multicenter electron transfer network, endowing the nanozyme with potent, broad-spectrum catalase-, superoxide dismutase-, and glutathione peroxidase-like activities that effectively neutralize various ROS. Ce–MnCo LDH gel exhibited good stability and local retention capacity, effectively alleviated radiation-induced oxidative damage, reduced DNA damage, protected mitochondrial function, and inhibited NF-κB-mediated inflammatory signaling. In the ARP rat model, intrarectal administration of Ce–MnCo LDH gel effectively alleviated radiation-induced injury. This platform restored the expression of tight junction proteins (ZO-1 and Claudin-3) in epithelial cells, repaired the integrity of the intestinal epithelial barrier, and remodeled the immune microenvironment in damaged areas by regulating inflammatory factors. In summary, this study provides a promising therapeutic strategy for radiation-induced intestinal injury and other oxidative inflammatory diseases.
✓ 已验证
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Yujin Li,Xueni Shang,Cuimeng Song,Jinchao Chen,Yun Li,Min Huang,Fanbin Meng
The demand for low-cost and high-performance energy storage supercapacitors is continuously promoting as a result of the rapid development of portable electric vehicles and electronic devices. Here, a high-performance MnCo alloy nanoparticles decorated boron-doped carbon nanotubes (MnCo–B/CNTs) electrode was obtained by a facile heteroatom hydrothermal and subsequent liquid-phase reduction methods, which yields improved performance for supercapacitor. In this process, boron doping led to extra oxygen graft into carbon surface , leading to the improved durability and wettability of the fabricated carbon-based electrodes, which presented both increased capacitances and rate capability due to electrolyte ion penetration and interactions with carbon surface. In addition, boron doping led to smaller size and higher dispersion of MnCo nanoparticles, facilitating more metallic alloy and new electroactive sites formation and promoting supercapacitive activity, which was attributed to increased MnCo alloy nucleation rate with boron-doped, electron donation from boron to alloy, and extra chemisorption sites. The constructed electrode exhibited all-round performance improvements of specific capacitance (1175 F g −1 at 0.5 A g −1 ) and capacitance retention (94.48% at a current density of 20 A g −1 after 5000 cycles), providing a novel insight for designing high performance supercapacitors .
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Xiangxi Wang,Lei Li,Liangge Xu,Zhao Wang,Zhuoyan Wu,Zhiliang Liu,Piaoping Yangs
The oxygen evolution reaction (OER) is vital for water electrolysis which demands low-cost, durable, and efficient electrocatalysts . Recently, 3d transition metal based OER catalysts become very attractive due to their abundant earth reserve and low price. However, these transition metals still suffer from severe dissolution problem and inappropriate adsorption ability to the intermediate species during OER catalysis. Herein, we prepared Mn and Co co-decorated Ni composites nanosheets (MnCo@NiS) via a facile step-by-step electrodeposition way, which showed near-optimal adsorption energy to oxygenated intermediates and much better electrocatalytic OER performance than single metal decorated NiS or non-decorated one, especially requiring a low OER overpotential of only 286 mV at 10 mA cm −2 in an alkaline electrolyte and Tafel slope of 31.5 mV dec −1 . The results indicated Mn and Co co-decoration is very efficient way to change the electron distribution and optimize the adsorption energy of NiS, leading to the high OER performance. In particular, the MnCo@NiS electrode demonstrates a highly impressive stability with not only much less cation dissolution but negligible degradation after 20 h durability test at 50 mA cm −2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Hexiang Xu,Lina Jin,Xinye Qian,Bo Li
Zinc-air batteries (ZABs) have garnered significant attention owing to their high safety, environmental friendliness, and cycle stability. Commercially available platinum‑carbon catalysts, despite their effectiveness, are prohibitively expensive, prompting researchers to focus on developing cost-effective alternatives. In this study, we successfully synthesized a high-performance, cycle-stable, methanol-tolerant material, [(MnCo) 2 O 4 @C], as an ORR catalyst for ZABs using affordable raw materials and a novel synthesis approach. The (MnCo) 2 O 4 @C catalyst exhibits a half-wave potential of 0.879 V. At a current density of 5 mA cm −2 , it enables the battery to operate stably for over 500 h, demonstrating exceptional ORR performance suitable for practical applications. This research offers a promising strategy for the development of non-precious metal catalysts for ZABs.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 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）