INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 8.3
Feidie Li,Zhishuncheng Li,Qiangli Lv,Lin Lv,Hua Wang,Tao Zhu,Xing Zhu,Kongzhai Li,Zhishan Li
Urea-assisted overall water splitting has emerged as a cost-efficient and promising technology for hydrogen production, which not only avoids the formation of an explosive H 2 /O 2 gas mixture but also significantly reduces the energy input required for water electrolysis. In this work, a bifunctional CuNNi 3-x Mn x catalyst self-supported on nickel foam (NF) was synthesized via a facile hydrothermal method followed by annealing, resulting in highly efficient and stable electrocatalysts for both the urea oxidation reaction (UOR) and the hydrogen evolution reaction (HER). Controlled Mn doping allows precise modulation of the electronic structure of CuNNi 2.4 Mn 0.6 at the Ni active sites, simultaneously enhancing the adsorption/desorption kinetics of hydrogen intermediates (H∗) and facilitating C–N bond cleavage in urea. The optimized CuNNi 2.4 Mn 0.6 catalyst requires only 1.336 V for UOR and 44 mV for HER to achieve a current density of 10 mA cm −2 , demonstrating remarkable bifunctional activity. Moreover, when employed as both anode and cathode in a urea-assisted overall water splitting system, the catalyst enables a cell voltage of merely 1.526 V at 10 mA cm −2 , significantly lower than that required for conventional water electrolysis (1.695 V vs. RHE). The system also exhibits excellent durability, maintaining stable performance for over 30 h at 10 mA cm −2 without significant activity loss. This work provides a foundation for the further exploration of transition metal-based bifunctional electrocatalysts, paving the way for energy-efficient hydrogen production and simultaneous treatment of urea-rich wastewater.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2026
·Vol. 46
·期 16
·118645
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IF 6.3
Yuzhe Xie,Jie Zhang,Yuting Liu,Xing Luo,Zixiang Pei,Baohua Cao,Konrad Świerczek,Yang Zhang,Wanbing Guan
To mitigate interconnect corrosion in seawater-fed solid oxide electrolysis cells (SOECs), Mn 1.5 Co 1.5 O 4 spinel coatings were deposited on Fe-22Cr stainless steel. At 750 °C, the coated interconnects exhibited an area-specific resistance (ASR) of 31.8 mΩ cm 2 after 4835 h of oxidation in air, with a parabolic rate constant of 3.0 × 10 −5 mg 2 cm −4 h −1 . Following exposure to seawater vapor for 500 h, the ASR reached 3.36 mΩ cm 2 , with a predicted value of 9.80 mΩ cm 2 at 5000 h. These findings underscore the coating’s improved oxidation resistance under dual-atmosphere conditions. Furthermore, a three-cells stack demonstrated high stability with a low degradation rate of 1.04 × 10 −5 h −1 at 100 mA cm −2 for 100 h. Post-test analysis confirmed a crack-free structure with negligible additional resistance, indicating that the spinel coating satisfies the engineering requirements for durable, direct seawater electrolysis and provides a scalable pathway for green hydrogen production.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Biao He,Tengfei Hu,Yuelong Xiong,Shiguang Yan,Fei Cao,Yonghong Chen,Zhichao Hong,Genshui Wang
Lead-free dielectric films are ideal candidates for pulse power capacitors due to their rapid charge–discharge capability, but their energy storage performance still needs further improvement to meet the requirements of high-performance applications. In this work, 0.84BaTiO3-0.16Bi(Mg0.2Ni0.2Zn0.2Zr0.2Nb0.2)O3-xMn (0.84BT-0.16BMNZZN-xMn)/LaNiO3 (LNO) heteroepitaxial films were successfully fabricated on SrTiO3 (STO) (001) substrates via chemical solution deposition (CSD) technology, and the regulation effects of Mn doping on the films’ microstructure, electrical properties, and energy storage characteristics were systematically investigated. The results show that the introduction of Mn ions effectively refines the grain size, improves the leakage behavior of the films, and thus significantly enhances the breakdown strength. When the Mn doping content x = 0.01, the film exhibits optimal energy storage performance: the recoverable energy density (Wrec) reaches 72.3 J·cm–3, the efficiency (η) is 72.6%, and the breakdown strength (Eb) is as high as 5604 kV·cm–1. Meanwhile, the sample demonstrates excellent temperature stability over the wide temperature range of −120 to 120 °C (Wrec = 48.1 J·cm–3 with a fluctuation of less than 2%, @3500 kV·cm–1), and the Wrec changes by less than 2% after 109 cycles, indicating outstanding long-cycle reliability. These results confirm that the 0.84BT-0.16BMNZZN-0.01Mn epitaxial film has broad application prospects in high-power energy storage fields and is a promising candidate material.
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OPTICAL MATERIALS
·
2026
·
IF 4.3
Yijun Chen,Shichao Zhou,Ou Xu,Tao Huang,Wenchao Lin,Bin He,Xiaodong Shen,Guolun Zhang,Bingsuo Zou
Organic-inorganic metal halides (OIMHs) have garnered significant attention due to their rich optical properties and potential applications in light-emitting diodes, display devices, solar cells, and photodetectors. In this work, isopropyltriphenylphosphonium bromide and 1-methyl-1-propylpiperidinium bromide were employed as organic ligands and introduced into the [MnBr 4 ] 2- tetrahedral structure, synthesizing two manganese-based organic-inorganic metal halide single crystals: (C 21 H 22 P) 2 MnBr 4 and (C 9 H 20 N) 2 MnBr 4 , via the anti-solvent vapor diffusion method. Their nearest-neighbor Mn 2+ distances are 11.23 Å and 9.69 Å, which effectively modulates electron-phonon coupling and magnetic interactions, giving distinct green emissions centered at 509 nm and 534 nm under 284 nm and 362 nm excitation, with high photoluminescence quantum yields (93% and 86%) and long luminescence lifetimes (295 μs and 390 μs), respectively. The emission of (C 21 H 22 P) 2 MnBr 4 is dominated by self-trapped excitons (STEs) assisted by magnetic polaron effects, while (C 9 H 20 N) 2 MnBr 4 exhibits pure Mn 2+ d–d transition emission. Furthermore, based on the (C 21 H 22 P) 2 MnBr 4 single crystal, the corresponding amorphous material was prepared via a melting–rapid solidification method, which exhibits an emission peak redshift at 10 nm and a photoluminescence quantum yield of 50%. Through temperature-dependent photoluminescence spectroscopy and X-ray diffraction spectroscopy, the optical and structural properties of the three OIMH materials at low temperatures were systematically characterized, revealing the regulatory effects of magnetic polaron effect and different organic ligand confinement effects on the Mn luminescence, as well as the varied lattice symmetry tuning role of the same organic ligand order on the luminescence behavior.
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NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.6
Jinwei Li,Yuling Jin,Zhihuang Xu,Liwang Ye,Diwai Wu,Kailun Yan,Xinxin Zhuang
Organic-inorganic metal halides (OIMHs) have garnered increasing attention due to their unique structure and outstanding optoelectronic properties. Achieving emissive OIMHs through Metal ion doping has emerged as a viable strategy. We report a new zero-dimensional (0D) OIMHs, 30%Mn2+:(HEP)CdBr4 (HEP-Mn:Cd, HEP:1-(2-Hydroxyethyl)piperazine), which exhibits green emission with a photoluminescence quantum yield (PLQY) of 62.01%, outperforming previously reported Cd-based OIMHs. The exceptional efficiency arises from the high probability of radiative recombination and minimal nonradiative losses. Also, HEP-Mn:Cd exhibits excellent thermal and air stability, making it a promising candidate for applications in the field of lighting materials.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Xiaofu Li,Tingfeng Xue,Junliang Ma,Zhibo Liu,Zejia Song,Bingyan Zhu,Liwei Pan,Jing Zhang
A bimetallic Mn-Co@γ-Al 2 O 3 catalyst was prepared • The catalyst effectively activates PMS for the mineralization of CIP • The catalyst enhances PMS activation via electronic, structural and active-site synergy • 1 O 2 is synergistically generated by LAS, oxygen vacancies and bimetallic redox cycles Ciprofloxacin (CIP) is recalcitrant to complete degradation by conventional treatment methods, and persulfate-based advanced oxidation processes often suffer low activation efficiency. In this study, a bimetallic Mn-Co@γ-Al 2 O 3 catalyst was developed to activate peroxymonosulfate (PMS) for the efficient mineralization of CIP. Under optimal conditions (1 mmol·L -1 PMS, pH=9), CIP was completely mineralized within 60 min. The catalytic activity of the bimetallic catalyst surpassed that of the single-metal Mn@γ-Al 2 O 3 and Co@γ-Al 2 O 3 , with a synergistic factor ( SF =1.12, >1) confirming a strong Mn-Co synergy. This synergistic effect results from coupled redox cycles, the inhibition of manganese oxide aggregation, and the presence of abundant Lewis acid sites and oxygen vacancies. The PMS system, primarily governed by singlet oxygen ( 1 O 2 ), effectively reduced the biotoxicity of CIP wastewater, increasing the germination rate of fescue seeds from 80% to 92%. A total of 14 degradation intermediates were identified. The excellent mineralization performance is closely associated with the unique CIP degradation pathway driven by 1 O 2 .
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MATERIALS LETTERS
·
2026
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IF 2.6
Sadegh Ghorbanzadeh,Wei Zhang
Mn-based antiperovskite nanoparticles hold promise for magnetic applications, but synthesis has been confined to high-temperature solid-state methods impeding nanoscale control. Here, a NaCl/KCl molten salt flux produces highly crystalline Mn 3 ZnC, Mn 3 AlC, and Mn 3 Zn(C,N) nanoparticles (10–30 nm) at 900 °C within 6 h. XRD and HRTEM confirm the cubic Pm̅3m symmetry and systematic lattice contraction upon nitrogen substitution. The compositions span a broad magnetic spectrum, Mn 3 ZnC is superparamagnetic (M s = 27.87 emu/g, H c = 1.4 Oe, T C = 120 °C), Mn 3 Zn(C,N) is soft ferromagnetic (21.88 emu/g, 69.3 Oe, T C = 142 °C), and Mn 3 AlC exhibits harder magnetic behavior (12.95 emu/g, 333.7 Oe). Under alternating magnetic fields, Mn 3 Zn(C,N) achieves a specific absorption rate of 15.10 W/g, showing that intermediate coercivity, tuned by interstitial nitrogen, optimizes hysteresis-loss heating in earth-abundant antiperovskites.
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Nanomaterials
·
2026
·Vol. 16
·期 7
·443
·
IF 4.8
Faxue Ma,Xiangju Wu,Zhen Ma,Jingjing Lu,Xueqing Zhu,Yuguang Lv
Owing to the high stability and low cost of nanozymes, they have been extensively investigated and reported. In this work, highly active CeO2nanoflowers were first prepared and then different metal elements were doped into the CeO2nanoflower matrix via a novel synthesis method to fabricate M-CeO2(M = Cu, Fe, Co, Mn, La) nanomaterials. Mn-CeO2with the highest peroxidase-like activity was selected via systematic screening, the as-prepared Mn-CeO2nanocomposites exhibited enhanced enzyme-like activity due to the strong metal-support interaction. This article explored the effects of doping ratio, pH, temperature, reaction time, and material concentration on its activity. A simple sensitive and selective colorimetric method was established and successfully used to detect hydrogen peroxide and ascorbic acid sensitively. When the hydrogen peroxide (H2O2) concentration is within the 2.0–120.0 μM range, the UV-visible absorbance at 652 nm was associated linearly with the H2O2concentration, R2= 0.9959, LOD = 1.7 μM (S/N = 3). The absorbance of the reaction system showed a good linear relationship with the ascorbic acid (AA) concentration (1.0–40.0 μM, R2= 0.992), LOD = 0.98 μM (S/N = 3). This study provides an effective way to construct efficient nanozymes and their potential applications in sensing and detection.
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JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
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2023
·
IF 2.7
Fuli Zhao,Junzi Li,Xiaodong Lin,Tingchao He
Phonon-assisted upconversion process is one of the important means to generate upconversion photoluminescence (UCPL), and has important applications in laser refrigeration and other fields. However, until now, the studies on UCPL behavior are still insufficient. Herein, this work synthesizes a series of Mn-doped two-dimensional hybrid metal halide (2D HMH) thin films and investigates their optical properties using various spectral techniques. Raman spectroscopic measurement confirms that Mn-doping is achieved via interstitial doping rather than Pb-substitution. By the measurement of the temperature-dependent PL spectrum, it is found that Mn-doping will weaken the thermal expansion effect of 2D HMHs, but will enhance the electron–phonon coupling strength. More importantly, both two-photon-excited and phonon-assisted UCPL are observed in Mn-doped 2D HMHs, with an extremely large phonon-assisted energy gain (approximately 500 meV). Our experimental results are of significance for designing phonon-assisted UCPL materials and expanding their applications.
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JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Wenyong Jia,Qilin Wei,Shangfei Yao,Shuaigang Ge,Chengyu Peng,Lishuang Wang,Xianci Zhong,Hui peng,Bingsuo Zou
All-inorganic ABX 3 (X = Cl,Br,I) can work as an ionic luminescence material in optoelectronic field. Here Mn-doped CsCdCl 3 hexagonal perovskite powders were synthesized and found to give bright orange-yellow colored emission at room temperature with an astonishingly quantum yield close to 100% at successful incorporation of 2.1% atomic ratio Mn ions. This enhanced emission comes from the local magnetic polaron—combined STEs with ferromagnetic Mn–Mn pair d-d transition ( 4 T 1 → 6 A 1 ) in replacement of Cd dimers in the CsCdCl 3 lattice. Compared with CsCdBr 3, this local magnetic polaron rely on the magnetic couplings, for example, in the Mn ions in the octahedral point and edge alternately connected 1-d chain and between 1-d chains, upon Mn concentrations. The magnetic coupling can modify the optical absorption edge and photoluminescence quantum yield (PLQY), and tune emission color from yellow to red. The PLQY maximum occurs at 350 K. The more Mn–Mn FM coupling in denser Mn-X octahedra face-shared chains in the bromides lead to a larger emission redshift than in the chloride. The magnetic coupling in the perovskite out of local Mn connection styles (separated, or point, edge and face shared TM ions) can determine its PLQY and emission color, which is useful in the future material design and optoelectronic or spintronic devices.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2021
·
IF 2.917
Yan CHEN,Hao-yu ZHANG,Fu-ying WU,Ze SUN,Jia-guang ZHENG,Liu-ting ZHANG,Li-xin CHEN
Mn nanoparticles (nano-Mn) were successfully synthesized and doped into MgH 2 to improve its de/hydrogenation properties. Compared with MgH 2 , the onset desorption temperature of 10 wt.% nano-Mn modified MgH 2 was decreased to 175 °C and 6.7, 6.5 and 6.1 wt.% hydrogen could be released within 5, 10 and 25 min at 300, 275 and 250 °C, respectively. Besides, the composite started to take up hydrogen at room temperature and absorbed 2.0 wt.% hydrogen within 30 min at low temperature of 50 °C. The hydrogenation activation energy of MgH 2 was reduced from (72.5±2.7) to (18.8±0.2) kJ/mol after doping with 10 wt.% nano-Mn. In addition, the MgH 2 + 10 wt.% nano-Mn composite exhibited superior cyclic property, maintaining 92% initial capacity after 20 cycles.
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JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Yanbin Li,Chaoyang Ma,Wanggui Ye,Chuandong Zuo,Yuzhen Wang,Xiaofei Shen,Zhanglin Chen,Chen Chang,Xuanyi Yuan,Yongge Cao
Developing new phosphor ceramics with higher thermal conductivity is a matter of priority for high power solid-state lighting. Herein, translucent red-emitting AlN : Mn phosphor ceramic with high thermal conductivity (72.37 W m −1 K −1 at 25 °C) and high luminescence thermal stability are successfully fabricated by pressureless sintering at 1800 °C for 3 h. Preparation process, photoluminescence , afterglow and electronic compensation mechanisms were discussed in detail. TEM analysis showed that the tiny grain boundaries are composed of disordered Al 2 O 3 phases. The EPR and TL spectra were used to reveal the O-related trap distribution. The AlN: Mn phosphor ceramics have brightly red afterglow with the longest afterglow time of 88 s and possess high luminescence thermal stability, that is to say, the luminescence intensity at 250 °C preserves 93.7% of that at room temperature . The encapsulated AlN: Mn LED device has a very bright red emission peak at 598 nm with a color purity of about 99%, indicating great application potential in solid-state lighting.
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