Advanced Science
·
2025
·
IF 14.1
Jie Li,Xue Wang,Jun Yu,Kai Xu,Zhe Jia,Hongkun Li,Lei Ren,Yiyuan Yang,Keke Chang,Yangyang Li,Xiangfa Liu,Jian Lu,Sida Liu
Development of active and cost-effective electrocatalysts to substitute platinum-based catalysts in alkaline hydrogen evolution reactions (HERs) remains a challenge. The synergistic effect between different elements in alloy catalysts can regulate electronic structure and thereby provide an abundance of catalytic sites for reactions. Thus, alloy catalysts are suitable candidates for future energy applications. Conventional methods for enhancing the performance of alloy catalysts have mainly focused on element composition and thus have often neglected to examine catalyst design. In this paper, a ruthenium–manganese–niobium alloy catalyst (Ru 62 Mn12Nb 21 O 5 ) is reported with a supra-nanocrystalline dual-phase structure that is fabricated through combinatorial magnetron co-sputtering at ambient temperatures. The induced crystal–crystal heterostructure of Ru 62 Mn 12 Nb 21 O 5 reduced system energy, thereby achieving balance between stability and catalytic activity. Ru 62 Mn 12 Nb 21 O 5 exhibited excellent HER performance, as demonstrated by low HER overpotential (18 mV at 10 mA cm −2 ) and robust stability (300 h at 1.2 A cm −2 ). Moreover, oxygen-rich interfaces in Ru 62 Mn 12 Nb 21 O 5 enhanced charge transfer and the kinetics of water dissociation as well as optimized hydrogen adsorption/desorption processes, thus boosting HER performance. The crystal–crystal heterostructure and oxygen-rich interfaces in Ru 62 Mn 12 Nb 21 O 5 are induced by its dual-phase nanocrystalline structure, which represents a new structural design for enhancing the performance of catalysts for sustainable energy development.
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高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Dan Chen,Kan Li,Hanyue Bao,Ming Zhai,Zhong Wang,Xiaozhi Wang
In this paper, a series of Ce@Mn core-shell catalysts were synthesized via a two-step hydrothermal method. Hydrothermal temperature significantly influenced the structure formation of catalysts. The Ce@Mn-150 catalyst, synthesized at 150 °C exhibited a well-defined core-shell structure. Moreover, it converted approximately 35 % of HCHO into CO 2 and H 2 O at ambient temperature, and achieved 90 % conversion of HCHO at 90 °C. Through structural characterization of the catalysts, distinct morphological differences were observed across all samples. The Ce@Mn-150 catalyst, which demonstrated the optimal catalytic activity, exhibited the most complete core-shell structure. The formation of the core-shell structure promoted the generation of Ce-Mn interfacial effects, which in turn modulated the interactions between Ce and Mn species . Elemental valence state characterization revealed that the well-defined core-shell structure facilitated the generation of Mn 3+ and Ce 3+ species, along with enhanced concentrations of surface-adsorbed oxygen (O ads ) and oxygen vacancies (O v ), which collectively enhanced HCHO adsorption and activation. H 2 -TPR results indicated that the core-shell structure enhanced the low-temperature reducibility of the catalyst and preserved abundant oxygen vacancies. This study revealed the influence of core-shell structures and intermetallic interactions at the core-shell interface on the catalytic performance of the catalyst, providing insights for designing efficient non-noble metal catalysts for HCHO removal.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shurui Xu,Jiaer Li,Bingyu Zhu,Xin Tang,Yujian Li,Linjia Wang,Wenbo Liao,Xiaobo Fu,Hang Chen,Junling Tu,Kailai Zhang,Baizeng Fang,Guoyu Zhong
Investigating renewable, eco-friendly, carbon-based materials with superior electrochemical performance is pivotal for advancing the practical implementation of supercapacitors, yet it presents challenges. In this study, a novel MnO@C-HMT-T composite, consisting of porous carbon-encapsulated MnO, was synthesized from a Mn-hexamine coordinated precursor via an in-situ pyrolysis approach. Among the different materials prepared, the MnO@C-HMT-800 stood out. It displayed a mesoporous architecture with a high specific surface area of 1353.1 m 2 g −1 , which facilitates ion transport and energy storage. Additionally, the MnO encapsulated in the carbon layer enables the generation of pesudocapacitance via the redox reaction of Mn 2+ and Mn 3+ . The interaction between the double-layer capacitance of the porous carbon and the pseudocapacitance of the manganese oxides endows the MnO@C-HMT-T composite with superior electrochemical performance. Consequently, the MnO@C-HMT-800 electrode exhibits an impressive specific capacitance of 575.2 F/g at a current density of 1 A/g, demonstrating exceptional stability at 95.6 % after 10,000 cycles. This surpasses the performance of most reported Mn-based materials in the literature. This work presents an innovative and straightforward process for fabricating carbon-encapsulated transition oxides that could be highly valuable in energy storage systems.
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JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2024
·Vol. 41
·期 3
·809-819
·
IF 1.8
Longwen Yang,Longwen Yang,Aochen Du,Aochen Du,Xingke Zheng,Xingke Zheng,Yun Ye,Yun Ye,Enguo Chen,Enguo Chen,Sheng Xu,Sheng Xu,Tailiang Guo,Tailiang Guo
All-inorganic perovskite quantum dots (PQDs) have excellent photoelectric performance, such as high photoluminescence quantum yield (PLQY), narrow full width at half-maximum (FWHM), and emission spectra covering the visible light wavelength. The emission color can be tuned over the full visible spectral region making them promising for white-light-emitting diodes (WLEDs). Further control over the optical and magnetic properties of PQDs can be achieved through doping of transition metal ions such as ${{\rm Mn}^{2 +}}$ ions. In this paper, a rapid doping method is employed at room temperature by using strong-acid cation-exchange resin during the metal ions doping process, which shortens the doping time, and ${\rm Mn}{:}{\rm CsPb}{({\rm Cl}/{\rm Br})_3}$ QDs were obtained. By controlling the reaction time between strong-acid cation-exchange resin and PQDs, we achieve different levels of manganese doping, resulting in a new, to the best of our knowledge, fluorescence peak at 600 nm. The introduction of strong-acid cation-exchange resin preserves the integrity of the PQD structure, while completing the doping within 30 min. Due to the low cost and mild reaction conditions of resin, it is expected that the ${\rm Mn}{:}{\rm CsPb}{({\rm Cl}/{\rm Br})_3}$ QDs can be mass-produced in large quantities. In addition, in order to provide high-quality white light emission, and prevent anion exchange reactions when mixed with ${{\rm CsPbBr}_3}$ QDs, the ${{\rm CsPbBr}_3}$ QDs are coated with silicon. Finally, by combining ultraviolet-light-emitting diodes (UVLEDs) with the aforementioned PQD mixture, this paper successfully fabricates WLEDs and demonstrates its excellent photoelectric performance. The constructed WLEDs produce warm white light with a high color rendering index (CRI) of 91 and a high correlated color temperature (CCT) of 5966 K, and the luminous efficacy (LE) of WLEDs is ${41}\;{{\rm lmW}^{- 1}}$.
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BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Sihan Wang,Xiaoli Zhu,Qingyi Meng,Pimiao Zheng,Jing Zhang,Zhiwei He,Haiyang Jiang
Accurate and rapid detection of foodborne pathogens is a key to prevent foodborne disease outbreaks. In this study, a novel impedance immunosensor based on a metal-organic framework (Mn-MOF-74) is used to rapidly and sensitively detect Listeria monocytogenes ( L. m ) in milk. Divalent manganese ions are released by the MOF reduction reaction mediated by hydrogen peroxide. Consequently, the impedance signal was detected by high conductive single-crystalline gold interdigitated microelectrode to achieve quantification of L. m . First, the capture antibodies (Ab 1 ) are modified on the surface of the magnetic beads to generate immunomagnetic beads (MBs@Ab 1 ), which are used specifically to separate L. m cells in the matrices. Later, the immunosensor (Mn-MOF-74@Ab 2 ) is added to the matrices to form a sandwich complex (MBs@Ab 1 - L. m -Mn-MOF-74@Ab 2 ). Henceforward, Mn 2+ is released from the sandwich composite via the action triggered by H 2 O 2 . The release of Mn 2+ significantly changes the impedance of interdigitated microelectrodes, leading to ultrasensitive detection of L. m . The recoveries for L. m cells at the concentration between 1.0 × 10 0 and 1.0 × 10 4 CFU/mL are 90.2%–101.7% in water and 88.5%–96.2% in milk. The detection limit of this approach for L. m cells in water and milk are 7.1 and 9.2 CFU/mL, respectively. This approach can achieve rapid quantification of L. m cells within 60 min, and can also be employed to monitor other foodborne pathogens.
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WATER RESEARCH
·
2017
·
IF 6.942
Erdan Hu,Ya Zhang,Shuyan Wu,Jun Wu,Liyuan Liang,Feng He
Mn(III) is a strong oxidant for one electron transfer , which may be important in the transformation of organic contaminants during water/wastewater treatment and biogeochemical redox processes. This study explored the reaction mechanisms of dissolved Mn(III) with organics. The role of dissolved Mn(III) either as a catalyst or an oxidant in reactions with organics was recognized. Aquo and/or hydroxo (or free) Mn(III), generated from the bisulfite activated permanganate process, facilitated efficient N-dealkylation of atrazine via a β-elimination mechanism, resulting no net redox reaction. In contrast, free Mn(III) degraded 4-chlorophenol via intramolecular redox processes, the same as hydroxyl radical ( OH), resulting in dechlorination , OH substitution, ring-opening and mineralization. Mn(III)-pyrophosphate compounds did not react with atrazine because complexation by pyrophosphate rendered Mn(III) unable to bond with atrazine, thus the electron and proton transfers between the reactants couldn't occur. However, it degraded 4-chlorophenol at a slower rate compared to free Mn(III), due to its reduced oxidation potential. These results showed two distinct mechanisms on the degradation of organic contaminants and the insights may be applied in natural manganese-rich environments and water treatment processes with manganese compounds .
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Catalysis Science & Technology
·
2015
·Vol. 5
·期 5
·2959-2972
·
IF 5.426
Ran Zhang,Li Guo,Chen Chen,Jizhong Chen,Angjun Chen,Xiuge Zhao,Xuerui Liu,Yuhe Xiu,Zhenshan Hou
A novel highly active Mn-doping ceria heterogeneous catalyst (MnOx–CeO2) was prepared and dedicated to the catalytic synthesis of aliphatic carbamates from CO2, aliphatic amines and methanol in one step. The as-obtained catalyst can attain a high yield of carbamate up to 82%, and can also be recycled at least four times through a simple procedure. It was observed that the Mn doping to ceria can alleviate the catalyst deactivation in consecutive catalytic recycles. In this regard, the role of Mn doping in the ceria in the synthesis of the aliphatic carbamates was investigated by means of X-ray diffraction (XRD), Raman spectra, specific surface areas (BET), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), CO2-temperature programmed desorption (CO2-TPD) and in situ diffuse reflectance infrared Fourier transform (DRIFT). The characterization demonstrated that the presence of MnOx in the ceria can not only inhibit the formation of stable carbonate species on the surface of the catalyst but also promote the decomposition/consuming of the carbonaceous species during the synthesis of aliphatic carbamates so as to allow improvement of the recyclability of the catalyst.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lipeng Huang,Yuxin Huang,Junxiang Wang,Jiarui Lin,Junling Xu,ZongJie Yin,Xiang Wang,Ming Li,Xiaoyan Shi,Lianyi Shao,Zhipeng Sun
The development of anode materials for lithium-ion batteries must meet the demands for high safety, high energy density, and fast-charging performance. TiNb2O7 is notable for its high theoretical specific capacity, low structural strain, and exceptional fast-charging capability, attributed to its Wadsley–Roth crystal structure. However, its inherently poor conductivity has hindered its practical application. This study employed an integrated internal and external modification strategy to enhance the electrochemical performance of TiNb2O7. The Mn ions was doped internally via the first hydrothermal reaction while a bridged conductive network with reduced graphene oxide (rGO) and carbon nanotubes (CNTs) was constructed by the second hydrothermal reaction, thereby improving both ionic and electronic conductivity of TiNb2O7 simultaneously. The resulting dual-carbon network-bridged Mn-doped TiNb2O7 (Mn0.1-TNO@rGO/CNT) delivered a specific capacity of 280 mAh g–1 at 0.5 C, a high-rate capacity of 177 mAh g–1 at 30 C, and retained 233.9 mAh g–1 after 200 cycles at 0.5 C, corresponding to an 84.1% capacity retention rate and a cycle fade rate of only 0.0795% per cycle. The superior rate performance and cycling stability of Mn0.1-TNO@rGO/CNT were maintained over a wide-temperature range. Besides, the strategy of dual-carbon network bridging and Mn-doping effectively prevents the TiNb2O7 spheres from cracking after long cycling. To assess the practical feasibility, the cell assembled using Mn0.1-TNO@rGO/CNT with high mass loading around 5 mg cm–2 demonstrated an initial capacity of 240 mAh g–1 at 0.5 C and delivered 60 mAh g–1 at a high rate of 20 C. Furthermore, a full cell paired with a LiNi0.5Mn1.5O4 cathode delivered a specific capacity of 81.3 mAh g–1 at 2 C and exhibited a high capacity retention of 68% after 500 cycles at 5 C.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Yun Gao,Hang Zhang,Jian Peng,Jinsong Wang,Xiaohao Liu,Lingling Zhang,Yao Xiao,Li Li,Yang Liu,Yun Qiao,Jiazhao Wang,Shulei Chou
High-performance, cost-effective cathodes are essential for grid-scale sodium-ion batteries (SIBs). Prussian blue analogs (PBAs) have shown great potential as SIB cathodes, but achieving both high capacity and long lifespan remains challenging. In this study, a series of low-cost ternary PBAs synthesized through structural regulation is presented to simultaneously achieve high capacity, stable cycling performance, and broad temperature adaptability. Among them, CuHCF-3 demonstrates a specific capacity of 132.4 mAh g −1 with 73.3% capacity retention over 1000 cycles. In-depth analyses, using in situ techniques and density functional theory calculations, reveal a highly reversible three-phase transition (monoclinic ↔ cubic ↔ tetragonal) in Na 1.96 Cu 0.45 Mn 0.55 [Fe(CN) 6 ] 0.91 ·□ 0.09 ·2.14H 2 O (CuHCF-3), which is driven by synergistic interactions between Mn and Cu. Mn enhances conductivity, increases the operating voltage, and introduces additional redox centers, while Cu mitigates the Jahn–Teller distortions associated with Mn and buffers volume changes during cycling. This structural synergy results in excellent temperature stability across a wide temperature range (−20 to 55 °C). 18650-type cylindrical cells based on CuHCF-3 with high loading density achieve 73.54% capacity retention over 850 cycles. This study offers valuable insights for designing durable, high-capacity electrode materials for SIB energy storage applications.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Mingyang Feng,Bo Wei,Hai Kuang,Lushi Lian,Hongyu Dong,Xiaohong Guan
Bisphenols are a class of emerging pollutants frequently detected in drinking water with concentrations ranging from ng/L to μg/L. However, previous studies have typically investigated their degradation at much higher levels (mg/L), limiting the relevance of those findings to the actual scenarios. Given the persistent challenge of effectively removing bisphenols at environmentally relevant concentrations, the development of efficient treatment methods is critical. In this study, we investigated the performance and mechanism of removing 18 trace-level bisphenols from drinking water via a calcium sulfite (CaSO 3 )-coupling permanganate (Mn(VII)/CaSO 3 ) process. Trace-level bisphenols (1.0 μg/L) could be effectively removed by the Mn(VII)/CaSO 3 process at environmentally relevant pH ranges (6.0–8.5). Quantitative structure-activity relationship analysis demonstrated that the degradation rates of bisphenols in this process were strongly positively correlated with their average polarizability. Reactive manganese species were identified to play a dominant role in the degradation of bisphenols. The potential risks of bisphenols could be effectively reduced after degradation by the Mn(VII)/CaSO 3 system. Moreover, the removal of trace-level bisphenols was resistant to interference from the water matrix and efficient in real water samples. Overall, the findings of this study highlight the Mn(VII)/CaSO 3 system as a promising pre-oxidation process for controlling trace-level bisphenols in drinking water.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 36
·16000-16007
·
IF 2.7
Yao-Xing Han,Renagul Abdurahman,Yue Zhang,Shi-Ji Liu,Xiu-Zhen Yang,Xuan-He Guo,Rui Zhang,Xing-Hong Pan,Xue-Bo Yin
Copper in vegetables can enter the human body, and excessive copper may cause uncomfortable symptoms; thus, it is urgent to test copper ions for safety concerns. Herein, we prepared Zn2GeO4:Mn2+,In3+ (ZGO:Mn,In) persistent luminescent nanoparticles (PLNPs) and then grafted glutathione for the determination of copper ions. ZGO:Mn,In was prepared by doping In3+ in ZGO:Mn to improve the emission at 532 nm under excitation at 258 nm. The doping amount, temperature, time, and pH were carefully optimized for a stronger emission intensity than ZGO:Mn. The fractional densities and energy band gaps were calculated by density functional theory, revealing the excitation enhancement mechanism of ZGO:Mn,In. The surface of ZGO:Mn,In was modified with carboxyl groups for linking glutathione to specially identify Cu2+ ions. The identification resulted in the aggregation-induced quenching of PLNPs’ emission. Thus, the sensor exhibited good selectivity for copper ions, and the composite was successfully applied to the detection of copper ions in serum and vegetable samples.
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Advanced Energy Materials
·
2023
·Vol. 13
·期 27
·2300746
·
IF 27.8
Yaoshen Niu,Zilin Hu,Bo Zhang,Dongdong Xiao,Huican Mao,Lin Zhou,Feixiang Ding,Yuan Liu,Yang Yang,Juping Xu,Wen Yin,Nian Zhang,Zhiwei Li,Xiqian Yu,Hao Hu,Yaxiang Lu,Xiaohui Rong,Ju Li,Yong-Sheng Hu
Na-ion batteries (NIBs) are promising for grid-scale energy storage applications. However, the lack of Co, Ni-free cathode materials has made them less cost-effective. In this work, Mg 2+ is successfully utilized to activate the oxygen redox reaction in earth-abundant Fe/Mn-based layered cathodes to achieve reversible hybrid anionic and cationic redox capacities. A high first charge capacity of ≈210 mAh g −1 with balanced charge–discharge efficiency is achieved without O-loss, showing a promising energy cost of $2.02 kWh −1 . Full cell against hard carbon anode without pre-sodiation shows energy density exceeding ≈280 Wh kg −1 with a decent capacity retention of 85.6% after 100 cycles. A comprehensive analysis of the charge compensation mechanisms and structural evolution is conducted. Voltage and capacity loss resulting from partially reversible Fe 3+ migration to the Na layer is confirmed, shedding light on further improvements for low-cost NIB cathodes in application scenarios.
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