Journal of Materials Chemistry C
·
2025
·
IF 5.1
Andrei S. Toikka,Ramazan Kenesbay,Maria Baeva,Dmitry M. Mitin,Maria Sandzhieva,Aleksandr Goltaev,Vladimir Fedorov,Alexander Pavlov,Dmitry Gets,Ivan Mukhin,Sergei Makarov
As alternatives to conventional perovskite light-emitting diodes, perovskite light-emitting electrochemical cells (PeLECs) are in great demand in modern science and technology due to their simplified structure and attainable higher luminance. Here, for the first time, we present the implementation and characterization of red CsPbIBr2-based PeLECs/LEDs. To improve perovskite material phase stability, we applied the following strategies for mitigating the mixed anion lead halide perovskite phase segregation: Pb2+ partial substitution by Mn2+, boundary passivation by poly(ethylene oxide) with polyvinylidene fluoride, and two-step thermal treatment with vacuuming and annealing. The complex measurements of photoluminescence, optical density, energy-dispersive X-ray spectroscopy, and X-ray diffraction confirm the minor phase segregation in the optimized perovskite layers. The performed ab-initio calculations predicted the band gaps of perovskite materials with a mixed anion composition, corresponding well to the results of optical measurements. Finally, current and electroluminescence time tracking proved the formation of a dynamic p–i–n structure in the studied PeLEC devices. The developed PeLECs/LEDs exhibited relatively high, for red PeLECs, electroluminescence up to 96 cd m−2 with a peak position at 667–672 nm.
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RSC Advances
·
2016
·Vol. 6
·期 86
·82707-82715
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IF 3.289
Wei Li,Rui-tang Guo,Shu-xian Wang,Wei-guo Pan,Qi-lin Chen,Ming-yuan Li,Peng Sun,Shu-ming Liu
A series of Mn/CeSiOx catalysts were prepared by the wet impregnation method and used for selective catalytic reduction of NO with NH3. As can be seen from the experimental results, the Mn/CeSiOx catalyst with a Ce/Si molar ratio of 2/1 showed excellent low-temperature SCR activity, high N2 selectivity and excellent SO2 and H2O tolerance. The relationship between the CeSiOx support and the SCR performance of Mn/CeSiOx (2 : 1) catalyst was investigated based on the characterization results of N2 adsorption, XRD, XPS, H2-TPR, NH3-TPD and in situ DRIFT. The strong interaction between Ce and Si resulted in the good dispersion of Mn species on the support; correspondingly, the redox ability and NH3 adsorption capacity were greatly enhanced. The results of in situ DRIFT study revealed that the NH3-SCR reactions over Mn/CeO2 and Mn/CeSiOx (2 : 1) mainly obeyed both the E–R mechanism and the L–H mechanism. Furthermore, the formation of more Mn4+ and chemisorbed oxygen greatly facilitates the oxidation of NO to NO2, as a result, promoting the low-temperature SCR performance of Mn/CeSiOx (2 : 1).
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ENERGY & FUELS
·
2019
·
IF 3.021
Jialin Meng,Yufeng Duan,Peng Hu,Yifan Xu,Xinze Geng,Ting Yao,Shaojun Ren,Hongqi Wei
A series of Mn–V–W/TiO2 (Mn–VWT) catalysts were synthesized by the impregnation method and calcinated at different temperatures (300–600 °C). To explore the effects of the reaction temperature, SO2, and H2O on the simultaneous removal performance of elemental mercury (Hg0) and NO, Mn–VWT were investigated by a fixed-bed reaction system. Various techniques (scanning electron microscopy, Brunauer–Emmett–Teller, X-ray diffraction, H2-temperature-programmed reduction, NH3-temperature-programmed desorption, and X-ray photoelectron spectroscopy) were utilized to characterize the samples. The results showed that the catalytic activity of Mn–VWT first increased and then decreased with the increasing calcination temperature. The removal efficiency of Hg0 and NO still had good performance even in low reaction temperature (200 °C), achieving 100 and 82%, respectively. Mn–VWT-400 had the best simultaneous removal performance because of the highest content of the Mn4+, V4+, and chemisorbed oxygen Oα and the best reductive activity at low temperature. Furthermore, SO2 irreversibly inhibited Hg0 and NO removal ability due to the sulfate and sulfite generation on the surface of Mn–VWT-400. Especially, the inhibition effect was more serious if SO2 and H2O coexisted because the rate of sulfate/sulfite was higher than that of the former. In addition, with the increase in reaction temperature, the effect of SO2 and H2O on the removal of Hg0 and NO over Mn–VWT was gradually reduced.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 17
·17373-17382
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IF 2.914
Liu Xuewei,Gao Minling,Qiu Weiwen,Khan Zulqarnain Haider,Liu Nengbin,Lin Lina,Song Zhengguo
In this study, a novel Fe–Mn–Ce oxide-modified biochar composite (FMCBC) was synthesized via pyrolysis to enhance the adsorption capacity of biochar (BC). Scanning electron microscopy-energy-dispersive X-ray spectroscopy confirmed that Fe, Mn, and Ce were successfully loaded onto the surface of the BC. A series of adsorption experiments showed that the FMCBC exhibited improved adsorption of As(III) in an aqueous environment. The adsorption process was well expressed by the pseudo-second-order kinetic model. The adsorption capacity of FMCBC reached 8.74 mg L −1 , which was 3.27 times greater than that of BC. The pH of the solution significantly influenced the adsorption of As(III), where the amount of As(III) adsorbed by FMCBC was maximized at pH 3. A high phosphate concentration inhibited adsorption, whereas nitrate and sulfate ions promoted As(III) adsorption and increased the FMCBC adsorption capacity. Similarly, with increasing humic acid concentration, the adsorption capacity of FMCBC for As(III) decreased; however, a low concentration of humic acid promoted adsorption. X-ray photoelectron spectroscopy analysis revealed that the adsorption of As(III) by FMCBC occurred through redox and surface complexation reactions. Therefore, FMCBC has excellent potential for purifying arsenic-contaminated water.
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PubMed
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2017
·Vol. 33
·期 9
·1865-1874
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IF 0.767
NING Hong-Yan,YANG Qi-Lei,YANG Xiao,LI Ying-Xia,SONG Zhao-Yu,LU Yi-Ren,ZHANG Li-Hong,LIU Yuan
Rh-Mn-based catalysts are promising for ethanol synthesis from syngas. In this work, a carbon fiber (CF)-supported Rh-Mn catalyst, with highly dispersed Rh and close contact Rh-Mn species, has been prepared by a new in situ polymerization route using citric acid and ethylene
glycol interaction. The structure and physicochemical properties of both the calcined and reduced samples have been characterized by TPR, XRD, TEM, EDS, CO-TPD, H2 chemisorption, and XPS techniques and the catalytic performance for ethanol synthesis from syngas has been evaluated.
The results show that the new method is beneficial in forming close contact Rh-Mn species than that obtained with the conventional impregnation method. This can enhance the dispersion and sintering resistance of Rh and effectively improve the activity of CO hydrogenation and the selectivity
to ethanol in ethanol synthesis from syngas.
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Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Liying Jiang,Pengju Wang,Yufen Zhang,Zhiwei Yao
Plasma-assisted catalytic oxidation of chlorinated volatile organic compounds (CVOCs) over Co-Mn/TiO 2 catalyst was performed in a dielectric barrier discharge (DBD) reactor having two segmented electrodes. The combination of DBD reactor with segmented electrodes and Co-Mn/TiO 2 catalyst remarkably enhanced the removal efficiency of chlorobenzene (CB) and selectivity of CO 2 . The segmented discharge reactor with Co-Mn/TiO 2 catalyst presented the best performance with 96.3 % of removal efficiency and 69.0 % of CO 2 selectivity at discharge voltage of 17 kV compared with the traditional plasma-only and other plasma-catalytic reactors. Results from discharge characteristics analysis showed that the addition of segmented electrodes and the catalysts could improve the plasma characteristics and greatly boost the specific energy density (SED) at the same voltage, resulting in the generation of more high-energy electrons and chemical active species which favor the oxidation of CB. Although the segmented electrodes facilitated the generation of O 3 , the Co-Mn/TiO 2 catalyst boosted the decomposition of O 3 to generate active oxygen species (O* and O 2 ). The synergistic effect of introducing segmented electrodes and the Co-Mn/TiO 2 catalyst into the DBD reactor at alternate voltages of 13 and 15 kV could promote the deep oxidation of intermediate products thereby bringing less effects on the catalyst surface, leading to a stable and high performance in CB removal. Furthermore, a plausible decomposition mechanism of CB destruction in the DBD reactor having segmented electrode over Co-Mn/TiO 2 catalyst was proposed according to the identification of gaseous intermediates based on GC-MS analysis.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 10
·106512
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IF 4.386
Zhuoran Hou,Dan Xiang,Di Yang,LiangYing Wen,Han Luo,Lili Li,Qi Yang,Liwen Hu
Designing an efficient and low-cost bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline electrolyte is still very important and challenging. Herein, using a simple hydrothermal and sulfidation annealing method, nanoflower-like Mn-NiS with regular morphology was grown in situ on the surface of nickel foam. Through the detailed analysis of X-ray photoelectron spectroscopy results, it is found that the successful doping of Mn2+ can effectively adjust the electronic structure of NiS. As we envisioned, the prepared Mn-NiS shows only 99 mV overpotential and 64.8 mV dec−1 Tafel slope in HER at 10 mA cm−2 and has only 320 mV and 65.5 mV dec−1 in OER at 50 mA cm−2. In addition, the alkaline electrolytic cell composed of Mn-NiS double electrodes has a cell-voltage of only 1.54 V at 10 mA cm−2, and maintains good stability. More importantly, the results of density functional theory calculations show that after Mn2+ successfully changes the electronic structure on the NiS surface, it not only promotes the HER kinetics, but also greatly increases the OER activity.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chao Wu,Shuang Cao,Heng Li,Zhi Li,Gairong Chen,Xiaowei Guo,Baobao Chang,Yansong Bai,Xianyou Wang
Herein, we put forward a feasible interfacial modification strategy in virtue of Mn 3 O 4 surface coating to construct protective shell and alleviate Jahn-Teller distortion during the charge/discharge process. It has been found that the increase of the oxygen vacancy on the surface of Li 1.2 Ni 0.27 Mn 0.54 O 2 of (LRNMO) after Mn 3 O 4 protective layer modification can effectively restrain the release of oxygen and enhancing rate capability, and thus improving its comprehensive electrochemical performances. In particular, the initial coulombic efficiency of the optimized LRNMO-1 electrode is improved from 72.3% to 84.3%. The capacity retention rate is up to 95.6% at 250 mA g −1 (1C) after 200 cycles. In addition, the LRNMO-1 electrode also has a good capacity retention rate (96.4% after 100 cycles) at a high current density of 5C. Moreover, the designed LRNMO@Mn 3 O 4 cathode exhibits higher ionic conductivity and better interface stability. As a result, this work offers a practicable and valuable exploration for the development and industrialization of Co-free Li-rich Mn-based cathode materials with high energy density .
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Dandan Han,Jialin Geng,Jingze Luan,Weiwei Jian,Lin Wu
Manganese-based oxides are promising cathodes for aqueous zinc-ion batteries but often suffer from structural instability, manganese dissolution, and poor conductivity. Herein, we propose a "dual-network synergistic construction" strategy through the in-situ derivation of a metal–organic framework to concurrently address these challenges. This strategy ingeniously constructs an oxygen-deficient network and a conductive carbon network within a hierarchical Mn₂O₃/C composite (O d -Mn₂O₃/C-400). The formed interfacial Mn–O–C bonds effectively enhance structural integrity and regulate the concentration of oxygen vacancies. As a cathode for aqueous zinc-ion batteries, the O d -Mn₂O₃/C-400 composite demonstrates exceptional electrochemical performance, delivering a remarkable specific capacity of 425 mAh·g⁻¹ at 3 A·g⁻¹. More importantly, it exhibits outstanding long-term cyclability, retaining 87.67% of its capacity (174 mAh·g⁻¹) after 5,000 cycles at a high current density of 5 A·g⁻¹. When configured into a zinc-ion hybrid supercapacitor (O d -Mn₂O₃/C-400//AC), the device achieves a high energy density of 119 Wh·kg⁻¹ at 189 W·kg⁻¹, and maintains 78.6% capacity retention with 97.5% Coulombic efficiency over 3,000 cycles. This work provides an effective material design paradigm for developing high-performance manganese-based electrodes for advanced energy storage systems.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Ke Wang,Yuqing Huang,Shiyong Sun,Haoming Tang,Lin Gong,Dongdong Wang,Xueyan Zhang,Sen Lin
The detoxification and valorization of toxic p-nitrophenol (p-NP) and its ester derivatives into high-value p-aminophenol (p-AP) present a significant challenge in green chemistry. This work addresses this challenge by developing a hybrid catalyst through the co-immobilization of lipase and a novel bimetallic Cu/Mn aminoclay nanozyme (CMAC) onto montmorillonite (Mt). The key innovation lies in the multifunctional design of CMAC, which serves not only as a highly active laccase-mimicking nanozyme but also as an intrinsic immobilization matrix for lipase, while the Mt support simultaneously prevents nanozyme aggregation and enhances structural stability. This integrated lipase-CMAC@Mt. platform enables efficient substrate channeling, whereby the p-NP intermediate generated from lipase-catalyzed hydrolysis of p-NPP is directly reduced by adjacent CMAC to p-AP, minimizing intermediate accumulation and overcoming diffusion limitations. As a result, the hybrid catalyst achieves efficient one-pot conversion of p-NPP to p-AP, without requiring harsh reagents or intermediate separation. Remarkably, it exhibits exceptional reusability (76.8 % activity retention after 10 cycles) and storage stability (82.4 % activity retained over 30 days), substantially outperforming conventional free enzyme systems. This study demonstrates a strategic bio-nano synergy that combines the specificity of enzymes with the robustness of nanozymes, offering a scalable and economically viable platform for simultaneous toxic waste elimination and resource recovery.
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Zichen Zhang,Jingyi Liu,Nan Chen,Tao Jiang,Shiyu Yao,Gang Chen,Deping Wang,Fei Du
Li-rich Mn-based oxides (LRMO) are of great significance in achieving high energy density all-solid-state lithium batteries (ASSLBs), owing to their high theoretical capacity and high operation voltage. Unfortunately, their practical application is hindered by severe interface degradation due to the chemical oxidation and electrochemical decomposition of solid electrolytes (SEs), driven by high-active oxygen and electron sources from LRMO. Herein, an interfacial modification strategy is proposed to stabilize the surface lattice oxygen of LRMO and reduce electronic conduction between LRMO and SEs, synergistically. Accordingly, the byproducts from chemical oxidation (InO − ) and electrochemical decomposition (LiCl − ) are largely suppressed, leading to superior interfacial transport with the lowest resistance. Consequently, the ASSLB achieves a high reversible capacity of 227.9 mA h g −1 at 0.1 C, a cycling stability of 90.1% capacity retention after 200 cycles at 0.1 C, and a superior rate capability with a capacity of 81.7 mA h g −1 at 3.0 C. This study enriches the fundamental understanding of LRMO/SEs interfacial evolution during the electrochemical cycling and the proposed interfacial modification strategy benefits the future design of Li-rich compounds for ASSLBs.
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CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Huan Zhang,Chang Liu,Yu Wang,Feifei Jia,Shaoxian Song
In this work, Mn (II) was doped into MoS 2 structure and then anchored on activated alumina beads to construct 3D-sized composites (Mn-MoS 2 @AABs). This component material was used as PMS activator for tetracycline (TC) degradation under light irradiation. According to experiment results, Mn-MoS 2 @AABs exhibited well degradation performance to TC, which ascribed to excellent photo-response property of Mn-MoS 2 and activation of Mn. Importantly, the 3D-sized structure made it facilely be recycled from solution, which catered to the demand for the practical application. Therefore, the novel strategy of designing Mn-MoS 2 @AABs had great significance for environmental restoration.
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