Journal of Materials Chemistry A
·
2026
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IF 9.2
Shuai Li,Baoguo Lv,Haiming Lv,Xiao Liu,Lihong Wu,Lianwang Shan,Yongxin Qian,Daguang Li,Rui Wang,Guizhen Wang
The high-entropy concept has been widely recognized as a promising strategy for enhancing microwave absorption (MA) performance. However, systematic studies on how crystallinity affects the MA behavior of high-entropy materials remain scarce, limiting further performance optimization. In this context, nanoflower-structured high-entropy CoZnCdCuMn sulfide ceramics with different crystallinities were prepared via solvothermal synthesis and post-annealing, revealing a nonmonotonic crystallinity-dependent MA behavior. Among the samples, CoZnCdCuMnS-500 with intermediate crystallinity achieves an optimal balance between dielectric loss and impedance matching, delivering superior MA performance with a minimum reflection loss of −50.79 dB. Furthermore, CoZnCdCuMnS-500 was incorporated into a polymer matrix to fabricate a composite film, which exhibits rapid photothermal response and good cycling stability, highlighting its potential for electromagnetic protection in cold and complex environments. This work elucidates the critical role of crystallization state in governing the MA performance of high-entropy sulfides and provides new insights into the structural design and performance optimization of microwave absorbers.
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高影响因子
Journal of Materials Chemistry A
·
2026
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IF 9.2
Xin Li,Zhongya Jia,Yi Wang,Kuo Liu,Xi Li,Tao Qi
The development of electrocatalysts that simultaneously exhibit high activity and robust stability for the oxygen evolution reaction (OER) is critical to advancing proton exchange membrane water electrolysis (PEMWE). In this work, Mn-doped RuO2 is composited with acid-resistant and highly conductive Ti4O7 via a simple molten salt method, yielding a Mn-RuO2/Ti4O7 hybrid electrocatalyst. Electrochemical measurements reveal that Mn-RuO2/Ti4O7 achieves a low overpotential of 194 mV at 10 mA cm⁻² and maintains stable operation for over 220 h at this current density. In situ spectroscopic analysis and computational studies further indicate that Mn doping modulates the electronic interplay between RuO2 and Ti4O7, which not only suppresses over-oxidation of Ru at high potentials but also promotes the deprotonation kinetics of reaction intermediates, thereby significantly enhancing the overall catalytic performance. This work offers an effective strategy for balancing activity and stability in acidic OER electrocatalys.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.7
Aibo Li,Chen Zhang,Fangyu Jin,Yanqing Ye,Zhengliang Wang,Peng Ren,Qin Wang,Qiang Zhou
Herein, we obtained a zero-dimensional organic-inorganic hybrid halide of C 7 H 18 N 2 MnBr 4 , whose crystal structure has been confirmed by the single-crystal X-ray diffraction. The single-crystal shows intense green emission with a high internal quantum efficiency of 85.0% and an external quantum efficiency 42.1%. Meanwhile, it also exhibits good thermal stability at elevated temperatures. Taking advantage of its efficient blue light absorption and emission, we fabricated two white light-emitting diodes by combining it with commercial K 2 SiF 6 :Mn 4+ or SrAlSiN 3 :Eu 2+ to investigate its potential in backlighting and lighting application. The former with K 2 SiF 6 :Mn 4+ achieves a wide color gamut of 95.8% of National Television System Committee standard. The latter reaches a high color rendering index of 94.2 and a low correlated color temperature of 3562 K. The fabricated C 7 H 18 N 2 MnBr 4 @polydimethylsiloxane flexible transparent scintillation screen further proves its good X-ray scintillation performance with a detection limit of 19.27 μGy/s and a light yield of 14,670 photons/MeV. This work provides convincing experimental evidence for the multifunctional application of organic-inorganic hybrid Mn(II) halides.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 46
·102880-102893
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IF 5.8
Li Yunhe,Li Hao,Zhao Baogang,Ma Yanming,Liang Peiyuan,Sun Tianjun
The escalating levels of surface ozone concentration pose detrimental effects on public health and the environment. Catalytic decomposition presents an optimal solution for surface ozone removal. Nevertheless, catalyst still encounters challenges such as poisoning and deactivation in the high humidity environment. The influence of support on catalytic ozone decomposition was examined at a gas hourly space velocity of 300 L·g −1 ·h −1 and 85% relative humidity under ambient temperature using Cu-Mn–doped oxide catalysts synthesized via a straightforward coprecipitation method. Notably, the Cu-Mn/SiO 2 catalyst exhibited remarkable performance on ozone decomposition, achieving 98% ozone conversion and stability for 10 h. Further characterization analysis indicated that the catalyst’s enhanced water resistance and activity could be attributed to factors such as an increased number of active sites, a large surface area, abundant active oxygen species, and a lower Mn oxidation state. The catalytic environment created by mixed oxides can offer a clearer understanding of their synergistic effects on catalytic ozone decomposition, providing significant insights into the development of water-resistant catalysts with superior performance. Graphical
研究领域:
环境催化
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大气污染控制
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材料化学
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表面科学
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催化化学
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环境工程
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功能材料
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2018
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IF 6.945
Xiaodeng Wang,Hongpeng Zhou,Dingke Zhang,Mingyu Pi,Jiajia Feng,Shijian Chen
Developing stable and high-efficiency hydrogen generation electrocatalysts , particularly for the cathode hydrogen evolution reaction (HER), is an urgent challenge in energy conversion technologies. In this work, we have successfully synthesized Mn-doped NiP 2 nanosheets on carbon cloth (Mn-NiP 2 NSs/CC), which behaves as a higher efficient three dimensional HER electrocatalyst with better stability at all pH values than pure NiP 2 . Electrochemical tests demonstrate that the catalytic activity of NiP 2 is enhanced by Mn doping. In 0.5 M H 2 SO 4 , this Mn−NiP 2 NSs/CC catalyst drives 10 mA cm −2 at an overpotential of 69 mV, which is 20 mV smaller than pure NiP 2 . To achieve the same current density , it demands overpotentials of 97 and 107 mV in 1.0 M KOH and phosphate-buffered saline (PBS), respectively. Compared with pure NiP 2 , higher HER electrocatalytic performance for Mn−NiP 2 NSs/CC can be attributed to its lower thermo-neutral hydrogen adsorption free energy , which is supported by density functional theory calculations.
研究领域:
材料科学
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电化学
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能量转换
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纳米材料
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催化
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高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Wanyun Li,Bangchuan Zhao,Jin Bai,Hongyang Ma,Peiyao Wang,Yunjie Mao,Shuai Lin,Xiaoguang Zhu,Xuebin Zhu,Yuping Sun
Lithium rich manganese based materials (LMR) have promised the likeliest candidate for next generation lithium-ion battery cathodes owing to its high energy density and low materials cost. However, severe capacity decline and voltage decay hinder their practical application, which is closely concerned with the structure degradation and irreversible oxygen release. Herein, a simple strategy to reinforce the structural stability of LMR materials by constructing heterostructure with Nb-based MXenes (Nb 2 CT x / Nb 4 C 3 T x ) is proposed. A small amount of spinel phase and pseudo-bonding between Nb and O ions as well as extra oxygen vacancies can be induced by the MXenes addition in LMR, effectively inactivating the surface oxygen and suppressing the structure distortion. In addition, MXene can also alleviate the volume change during cycling process and provide additional transport channels for electrons. The ably designed 3 wt% LMR/Nb 2 CT x cathode presented high initial Coulombic efficiency of 85.6% at 0.1C (vs. 77.4% for the pristine material) and excellent cycling performance with a capacity retention of 83.8% after 200 cycles at 0.5C (vs. 66.6% for the pristine material). This work sheds some light on stabilizing the structure of lithium-rich manganese materials and provides a new idea for the design of other high performance cathode materials.
研究领域:
材料科学
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电化学
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储能技术
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锂离子电池
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纳米材料
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Huan Zhou,Wenhua Cheng,Qingcui Liu,Wei Wang,Weilu Zhang,Zhouliang Tan,Juan Ding,Yudai Huang
Li-rich Mn-based oxides (LRMO) greatly increase its output energy density due to its additional oxygen redox activity. However, the inherent oxygen loss and irreversible phase transition induce low initial coulombic efficiency and serious voltage decay, further seriously impeding its industrial application. Herein, a near-surface in-situ reconstruction strategy has been proposed, which constructs the oxygen vacancies and spinel phase coating on the surface of single-crystal Li-rich Mn-based oxide (SC-LRMO) concurrently to improve Li + storage performance via the oxalic acid induction method. Intensive exploration based on structure characterizations demonstrates that such a near-surface in-situ reconstruction strategy not only accelerates the transmission of Li + , but also stabilizes high-voltage redox reactions by trapping the escaping O n− within the newly formed spinel phase coating. Impressively, the modified sample exhibit 91.1% capacity retention ratio after 300 cycles, superior to the SC-LRMO (74.5% capacity retention ratio after 300 cycles). Additionally, even at a high cut-off voltage of 5 V, the acid etched sample exhibits significantly enhanced cycling stability, delivering 200 mAh g −1 with a 94% capacity retention ratio after 300 cycles. This surface self-reconstruction strategy provides profound insights into regulating the surface structure of LRMO for high-energy-density lithium-ion batteries.
研究领域:
材料科学
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电化学
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储能
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电池技术
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高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Yin Xie,Yongcheng Jin,Lan Xiang
The nontoxicity and low cost make LiMn2O4 a competitive cathode material for lithium-ion batteries. LiMn2O4 has a high theoretical capacity (296 mAh g–1) when cycled in the 3 and 4 V regions. However, it displays a low practical capacity (∼120 mAh g–1) because of the unavailability of the 3 V region caused by severe Jahn–Teller distortion. The present work investigated the full utilization of LiMn2O4 in both 3 and 4 V by tuning the nanoscale interfacial properties. Li-rich structures at the surface and interface of the spinel material and nanograin strain were introduced to improve the performances and were achieved by grinding LiMn2O4 and Li2O at 700 rpm for 10 h under an argon atmosphere. The product shows a high initial discharge capacity of 287.9 mAh g–1 at 0.05 C between 1.2 and 4.6 V and retains 83.2% of the capacity after 50 cycles. The nanoscale interfacial structure was clarified by spherical aberration-corrected microscopy and XRD refinement, and complex occupancies of Li and Mn were found at the interface. A correlation between the interfacial properties and electrochemical performance was established, and the improved performance could be attributed to the polycrystalline nature of the material, the unique Li-rich interfacial structure, and the slightly elevated valence state of Mn. The present results may provide insight for further evaluating the complex mechanism of controlling the electrochemical performance of LiMn2O4.
研究领域:
材料科学
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电化学
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储能
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锂离子电池
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纳米材料
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zichen Shangguan,Xingzhong Yuan,Longbo Jiang,Chencheng Qin,Xiangyan Chen,Jing Bai,Zhiyan Feng,Jingyi Wang,Hou Wang,Hui Wang
A Co Mn atomic switch reconstructs radical and non-radical PMC activation pathways. • Nominal waste O 2 is valorized into selective 1 O 2 via a unique cascade. • The non-radical route yields 13.3-fold rate hike and effluent detoxification. • High robustness is proven over 100-h continuous flow operation in real water matrices. Advanced oxidation processes (AOPs) hold great promise for pollutant abatement, yet selectively triggering non-radical pathways remains a formidable challenge, as radical and non-radical routes often compete kinetically. Here, by exploiting the confined framework of Silicalite-1 zeolites, we engineer bimetallic Co Mn sites where tailoring the Co/Mn ratio drives a structural evolution from isolated diatomic to nanoclusters, functioning as an atomic-scale switch to govern this competition in peroxymonocarbonate (PMC) activation. A Co-rich composition stabilizes atomically dispersed heteronuclear Co Mn sites featuring Mn-promoted Co(II) centers. This precise configuration kinetically inhibits direct peroxide cleavage and instead promotes interfacial single-electron transfer to oxygen (O 2 ), thereby valorizing this traditionally wasted byproduct into the non-radical singlet oxygen ( 1 O 2 ) generation. Conversely, a Mn-rich composition induces aggregated nanoclusters with abundant electron-deficient oxygen vacancies, which facilitate peroxy-bond dissociation and shift the reaction toward radical pathways. Corroborated by density functional theory and comprehensive experimental validations, this composition-dependent pathway regulation affords the optimized non-radical system a 13.3-fold kinetic enhancement and stable continuous-flow operation over 102 h. Download: Download high-res image (130KB) Download: Download full-size image
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高影响因子
ACS Catalysis
·
2026
·Vol. 16
·期 16
·15999-16012
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IF 13.6
Tian Ningbo,Ma Hong,Chen Fei,Ding Runlong,Jia Lingyu,Yang Shihao,Dang Shanshan,Tu Weifeng,Zhang Zhenzhou,Han Yi-fan
Given the similar electronic structure of N and C atoms, iron nitrides and iron carbides are both active for Fischer–Tropsch synthesis. In this work, a series of FeMn- x C 3 N 4 catalysts were prepared via NH 3 thermal decomposition of graphitic carbon nitride (g‑C 3 N 4 ). Tuning the addition content of g-C 3 N 4 can promote the dispersion of Mn species and increase the ratio of Fe 2 N to Fe 4 N, regulating product distribution from C 2+ alcohols to olefins for syngas conversion. The iron nitride catalyst without g‑C 3 N 4 shows the surface enrichment of Mn species, which promoted the formation of CHO* and transformation toward C 2+ alcohol, resulting in the proportion of C 2+ alcohols in C 2+ products reaching up to 36.2%. The introduction of g‑C 3 N 4 promoted the dispersion of Mn species and facilitated electron transfer from Mn to Fe, generating electron-rich Fe species that enhanced the dissociative adsorption of CO and boosted the conversion of CHO* to CH*. As a result, the olefin proportion in C 2+ products remarkably increased to 74.0% while decreasing the proportion of C 2+ alcohols to 10.2%. Density functional theory (DFT) indicated that the energy barrier from CHO* to CH* decreased on the surface of highly dispersed MnO x -modified Fe 2 N. Simultaneously, the adsorption energy of olefins decreased, leading to the increasing selectivity of olefins. This work acquired a better understanding of tuning reaction pathways from C 2+ alcohol synthesis to olefin synthesis on iron nitride catalysts, aiming to provide guidance on the optimization of catalyst design for efficient syngas conversion.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Yuanzhou Mu,Mengmeng Sun,Siyi Guo,Tingting Dong,Lizhong He
A 3D honeycomb-like Ni–Co–Mn oxide composite is grown on carbon cloth. • Multi-component synergy enhances charge storage. • The electrode delivers 349.7 mAh g −1 and retains 90% capacitance after 30,000 cycles. • An asymmetric device achieves 68.99 Wh kg −1 and 98.33% retention after 20,000 cycles. Exploring promising electrode materials with enhanced specific capacitance, cyclic stability, and capacitance retention for supercapacitor (SC) applications remains a significant challenge. Herein, a three-dimensional (3D) honeycomb-like porous ternary Ni-Co-Mn metal oxide composite electrode material was successfully grown on a carbon cloth (CC) substrate, serving as a promising multifunctional candidate for high-performance supercapacitors. In this design, NiCo and NiMn precursors were first fabricated on the surface of carbon cloth via a facile two-step hydrothermal deposition route, followed by in situ high-temperature annealing to yield a high-performance electrode material. Multiple characterization techniques indicate that the electrode material exhibits a 3D porous structure comprising NiCo 2 O 4 , Ni 6 MnO 8 , NiMnO 3 , and CoMnO 4 , collectively denoted as NC@NM-O. Leveraging the synergistic effects of multiple components and unique structural features, the NC@NM-O electrode delivers an ultra-high specific capacitance of 2517.54 F g −1 at a current density of 1 A g −1 and maintains 90.02% capacitance retention at a high discharge rate of 10 A g −1 after 30,000 cycles. An asymmetric all-solid-state supercapacitor, assembled with an activated carbon (AC) negative electrode (NC@NM-O//AC), achieves an energy density of 68.99 Wh kg −1 and a power density of 827.99 W kg −1 at a working voltage of 1.8 V. After 20,000 cycles, the device maintains an impressive capacitance retention rate of 98.33%. Overall, this work demonstrates that rationally designed, multi-component transition metal oxides can serve as advanced battery-type electrode materials for energy storage devices and provides a promising strategy for the development of next-generation high-performance supercapacitors. Download: Download high-res image (152KB) Download: Download full-size image
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Shiqiang Sun,Chuanjun Yuan,Ming Li,Meng Wang,Guo Cheng,Ke Liang
By using naturally abundant diatomite with unique particle and porosity structures as the silica precursor, a novel green-emitting diatomite-derived Zn 2 SiO 4 :Mn phosphor has been obtained as a dual functional sensor for developing latent fingerprints, serving as a fingerprint powder and a reagent for small particle reagents (SPRs). Parameters including calcination duration, calcination temperature, molar ratio of manganese salt to zinc and manganese salts, and molar ratio of zinc and manganese salts to diatomite have been adjusted to optimize luminescent property of this phosphor. Formation mechanism has been proposed based on the change of particle morphology and mesopore structure. With respect to material synthesis, high porosity of diatomite plays a critical part in ensuring uniform doping of Mn 2+ , lowering reaction temperature, sparing inert or reducing atmosphere. Furthermore, surplus diatomite in the precursors results in basic retention of particle morphology which is favorable for latent fingerprint development. Efficient green emission centered at 525 nm of the diatomite-derived Zn 2 SiO 4 :Mn under 254 nm excitation originates from the 4 T 1 → 6 A 1 transition, making it a very capable fluorescent fingerprint powder that can suppress interferences from various surfaces, especially with the aid of 530 nm band-pass filter as an optical filter and green channel of RGB images as a digital filter. Given that the luminescence of diatomite-derived Zn 2 SiO 4 :Mn phosphor is not subject to external environment factors such as water or dissolved components, a fluorescent SPR prepared by adding a certain amount of this powder (10 mg mL −1 ) to an aqueous solution of sodium dodecyl sulfate (0.050 wt%) shows better performance compared with some commercially available SPRs. Latent fingerprints on glass sheets can be clearly visualized even if they have been immersed in water as long as 5 days. Therefore, the successful acquisition of green luminescent diatomite-derived Zn 2 SiO 4 :Mn contributes to both the synthesis of this popular green-emitting phosphor and the application of fingerprint development.
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）