APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Hong Liang,Qiang Zheng,Kaibin Zhang,Youli Yang,Ran He
Mesoporous 10CeO x /MnO x -Y catalysts were successfully prepared by doping Ce and calcining Mn-BTC (BTC = 1,3,5-benzenetricarboxylate) for ozone catalytic decomposition. The 10CeO x /MnO x -300 catalyst exhibited the highest catalytic activity under the relative humidity (RH) range from less than 5–65 %, giving 100 % conversion of 40 ppm O 3 after 6 h. Series of physicochemical characterizations including XRD, TG, SEM, HR-TEM, ICP-OES, BET, XPS and H 2 -TPR were introduced the relationship of calcination temperature, catalysts structure and ozone catalytic performance. The results demonstrated that the 10CeO x /MnO x -300 catalyst had the highest Mn 3+ /Mn 4+ and O ads /O latt ratios and the largest specific surface compared with those of other samples, which are crucial to decompose ozone. In addition, better dispersion of crystals, larger pore volume, more oxygen vacancies, and better low-temperature reducibility are also conducive to ozone decomposition. This research establishes the basis for the application of manganese-based MOFs for ozone decomposition.
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
Plasma Processes and Polymers
·
2024
·Vol. 21
·期 7
·2400037
·
IF 2.9
Xuming Zhang,Yun Shan,Zhi Sun,Hua Pan,Yuzhen Jin,Zuchao Zhu,Liancheng Zhang,Wenhao Lin,Zhengbo Dai,Zhengang Lou,Huaming Li,Kai Li
Plasma catalytic CO 2 hydrogenation to methanol over MnO x /ZrO 2 catalyst was investigated in this work. A boosted methanol yield of 4.6 mg/h was obtained over MnO x /ZrO 2 catalyst, while it was only 0.0 and 0.7 mg/h for ZrO 2 and MnO x catalyst, respectively. The interaction between MnO x and ZrO 2 was responsible for the enhanced methanol yield. It resulted in sufficient oxygen vacancy. The in situ DRIFT spectra was conducted to reveal the plasma catalytic CO 2 hydrogenation to methanol reaction mechanism and the key intermediates of HCOO and CH 3 O species were determined. The sufficient oxygen vacancy promoted the formation of the key intermediates, especially the CH 3 O species.
研究领域:
催化化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2026
·
IF 1.8
Zuliang Sun,Manlin Wei,Xiaojuan Shen,Maiyong Zhu
Flexible supercapacitors (FSCs) are promising power sources for wearable electronics, yet their performance is often limited by the use of rigid metallic current collectors. In this study, we presented a freestanding porous polyurethane/PEDOT:PSS/MnO x sandwich-structured electrode fabricated through a straightforward solution-based method. The design employed a flexible porous polyurethane (PC) film as the substrate, while high-capacitance MnO x and MnO x /PEDOT (PM) composites were encapsulated between highly conductive PEDOT:PSS layers serving as the active materials. Leveraging the exceptional mechanical flexibility of the PC film, the high electrical conductivity of PEDOT:PSS, and the superior capacitance of MnO x and PM, along with their synergistic interactions including strong interfacial adhesion, rapid charge transfer, and efficient ion diffusion, the as-fabricated PCS-MPM-PS electrode delivered a high areal capacitance (Ca) of 408.9 mF cm −2 (~371.2 F g −1 ) at 1 mA cm −2 . Furthermore, a solid-state symmetric SC was fabricated using two identical PCS-MPM-PS electrodes, delivering a high Ca of 152.6 mF cm −2 at 1 mA cm −2 . Notably, this performance remained stable across various bending angles, demonstrating excellent mechanical flexibility and significant potential for use in wearable energy storage devices. Graphical A sandwich-structured flexible electrode was fabricated through a simple solution process, in which MnO x nanoparticles are encapsulated within highly conductive PEDOT:PSS layers on a porous polyurethane (PC) film. By inserting the MnO x /PEDOT (PM) composite between the MnO x and PEDOT:PSS layers, the electrochemical performance and cycling stability of the electrode are significantly enhanced.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yong Liu,Canshuo Gu,Lungang Chen,Wenguang Zhou,Yuhe Liao,Chenguang Wang,Longlong Ma
Metal–oxide interaction was widely observed in supported metal catalysts, playing a significant role in tuning the catalytic performance. Here, we reported that the interaction of Ru and MnOx was able to facilitate the hydrodeoxygenation of levulinic acid (LA) to 2-butanol with a high turnover frequency (1.99 × 106 h–1), turnover number (4411), and yield (98.8%). Moreover, this catalyst was capable of removing the hydroxymethyl group of lactones and diol with high yields of products. The high activity of the Ru–MnOx catalyst was due to the strong Ru–MnOx interaction, which facilitated reduction of Ru oxide to Ru0 and Mn oxide to Mn2+. The increased fractions of Ru0 and Mn2+ provided metal and Lewis acid sites, respectively, and therefore facilitated LA hydrodeoxygenation. A linear correlation between the hydrodeoxygenation activity of the Ru–MnOx catalyst and [Mn2+]ln([Ru0]) was observed.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuhui Xu,Gaini Zhang,Jianhua Zhang,Xiaoxue Wang,Jingjing Wang,Shuting Jia,Yitong Yuan,Xiaoli Yang,Kaihua Xu,Chunran Wang,Kun Zhang,Wenbin Li,Xifei Li
MnO 2 cathode materials have presented challenges due to their poor conductivity, unstable structure, and sluggish diffusion kinetics for aqueous zinc-ion batteries (AZIBs). In this study, a nanostructured MnO x cathode material was synthesized using an acid etching method, Which introduced abundant Mn(III) sites, resulting in the formation of numerous oxygen vacancies . Comprehensive characterizations revealed that these oxygen vacancies facilitated the reversible adsorption/desorption of Zn 2+ ions and promoted efficient electron transfer . In addition, the designed mesoporous structure offered ample active sites and shortened the diffusion path for Zn 2+ and H + ions. Consequently, the nanosized MnO x cathode exhibited enhanced reaction kinetics, achieving a considerable reversible specific capacity of 388.7 mAh/g at 0.1 A/g and superior durability with 72.0% capacity retention over 2000 cycles at 3.0 A/g. The material delivered a maximum energy density of 639.7 Wh kg −1 at 159.94 W kg −1 . Furthermore, a systematic analysis of the zinc storage mechanism was performed. This work demonstrates that engineering oxygen vacancies with nanostructure regulation provides valuable insights into optimizing MnO 2 cathode materials for AZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Wenshuo Hu,Renzhi Zou,Yi Dong,Yu Zhang,Mingchu Ran,Qi Xin,Yang Yang,Hao Song,Weihong Wu,Shaojun Liu,Chenghang Zheng,Xiang Gao
Enhancement of the low-temperature (LT) performance of selective catalytic reduction (SCR) of NOx with NH3 has been a spotlight in environmental catalysis. Here, we use a bifunctional catalytic system mixing V–W/Ti with an oxidative component, i.e., MnOx/CeO2, to achieve both improved LT-SCR activity and N2 selectivity. An integrated approach of steady-state kinetic measurements, chemical trapping techniques, time-resolved in situ FTIR spectroscopy, and density functional theory (DFT) calculations reveals that such a synergistic enhancement is at a short distance and is significant when V–W/Ti and MnOx/CeO2 are in intimate contact. These findings further suggest a bifunctional LT-SCR pathway mediated by a short-lived, mobile nitrite-precursor intermediate, which is facilely generated on the oxidative component and then communicates with the adjacent SCR phase through reacting with the abundant NH3 adsorbates there. Assembling such a mechanism with commercial SCR catalysts, accordingly, acts as a promising way to enhance the LT-SCR performance.
研究领域:
环境催化
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yurong Zhang,Junpeng Wang,Meiying Niu,Jun Tang,Zhipeng Chen,Chao Wan,Qingping Ke
Manganese oxides (MnO x ) have been emerged as highly active catalysts for the aerobic oxidation of biomass-derived compounds. Herein, a facile urea–redox hydrothermal method was employed to scalable synthesis of MnO x oxides with surface abundant unsaturated Mn and O species. The defective MnO x (MnO x –D) catalyst exhibits remarkable catalytic performance, enabling the room-temperature aerobic oxidation of biomass–derived alcohols with yields exceeding 99%. This represents a substantial 90.8-fold increase in activity compared to commercial MnO 2 . Moreover, MnO x –D catalyst demonstrates broad substrate scopes for various biomass–derived alcohols and displays recyclability for the aerobic oxidative conversion of 5-hydroxymethylfurfural (HMF) over five cycles. Through a comprehensive analysis involving X–ray photoelectron spectroscopy (XPS), in–situ infrared (IR) spectroscopy, and controlled experiments, it is established that the presence of surface–adsorbed H 2 O species on MnO x –D catalyst significantly influences its catalytic performance. Mechanism studies reveal that the aerobic oxidation of biomass–derived R–CH 2 –OH compounds into the corresponding aldehydes can proceed via radical and non–radical pathways. Notably, the catalytic activity of MnO x –D catalyst in both pathways is mediated by the surface adsorbed H 2 O species. In the radical route, surface adsorbed H 2 O and O 2 species are converted into active •OH radical species, while in the non–radical route, surface adsorbed H 2 O can form a complex of HMF––H 2 O species. Both processes enhance the abstraction of H from the O–H and C–H bonds in the R–CH 2 –OH compounds on MnO x –D catalyst. This discovery could potentially guide the development of efficient metal oxidic catalysts for the oxidation of biomass–derived R–CH 2 –OH compounds.
研究领域:
催化化学
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材料科学
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环境化学
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产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2024
·Vol. 9
·期 1
·109-121
·
IF 6
Xiaojuan Shen,Shouyan Sun,Pengwei Liu,ManLin Wei
3D foam-like composites with a large specific surface area and a well-distributed interconnected pore structure have been recognized as promising materials for energy storage devices. In this study, a novel composite electrode (PEUS-Mn-PS) consisting of a 3D foam-like PEUS matrix embedded with manganese dioxide (MnOx) was prepared using a simple and facile method. The PEUS matrix was fabricated by incorporating poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and water polyurethane (PU), where a sacrificial template of poly(3,4-ethylenedioxythiophene) (PEDOT)-decorated Ni foam (NF) was utilized. Specifically, surface modification of NF with a thin layer of PEDOT resulted in the formation of a more regular 3D interconnected scaffold of PEU with more hydrophilic surface, facilitating homogeneous formation of the electrode materials and electrolyte infiltration. Benefiting from the high conductivity of PEDOT:PSS, large surface area provided by PEU, and high capacity offered by MnOx, the resulting flexible PEUS-Mn-PS electrode exhibited an exceptional areal specific capacitance of 681.7 mF cm−2 (∼486.9 F g−1) at 1 mF cm−2, much larger than 358.9 mF cm−2 of the PUS-Mn-PS electrode prepared without PEDOT modification and 318.7 mF cm−2 of the NF-Mn electrode synthesized through direct electrodeposition of MnOx on NF. The resulting PEUS-Mn-PS electrode allowed the assembled solid-state symmetric flexible SC to achieve an impressive energy density of 0.043 mW h cm−2 at a power density of 2.24 mW cm−2, while maintaining excellent electrochemical performance even under various bending angles. This work provides a new approach to designing high-performance flexible SC electrode materials using a simple, cost-effective, and environmentally friendly method.
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
ULTRASONICS SONOCHEMISTRY
·
2025
·
IF 9.7
Jiahui Xu,Yi Liu,Guangzheng Zhang,Jinmei Wu,Xujie Cui,Wenqing Wei,Ziyan Yuan,Linlin Bu,Heyou Han,Weihui Li,Zhiyong Song
The rapid spread of drug-resistant bacterial infections has become a major global health challenge, particularly in the treatment of deep organ abscesses, which often lead to severe and life-threatening infections. Traditional light-responsive and microenvironment-responsive nanoparticle drug delivery systems (DDSs) have limitations in treating deep abscesses. In contrast, ultrasound (US)-driven sonodynamic therapy (SDT), with its non-invasive, targeted radiation and excellent tissue penetration capabilities, offers great potential for eradicating deep bacterial infections. This study proposes an ultrasound-driven manganese-based nanoparticle drug delivery system (AMP) for the effective treatment of methicillin-resistant Staphylococcus aureus (MRSA) infections. The core of the system is manganese oxide (MnOx) nanoflowers, which serve as the nanoparticle carrier, loaded with the antimicrobial non-antibiotic drug auranofin, and surface-modified with polyethylene glycol to enhance its biocompatibility and drug delivery performance. AMP demonstrates significant antibacterial activity in vitro and effectively promotes wound healing under US-driven stimulation. Furthermore, the potential antibacterial and wound-healing mechanisms of AMP are revealed for the first time. This study cleverly combines non-antibiotic drugs with inorganic nanomaterials to successfully achieve efficient SDT, providing a new and effective strategy for treating deep bacterial infections.
研究领域:
纳米技术
·
生物医学工程
·
抗菌治疗
·
药物递送
·
超声成像
·
传染病
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Xing Li,Lintao Chen,Yugo Osaka,Zhaohong He,Lisheng Deng,Hongyu Huang
Sulfur dioxide (SO 2 ) emissions from ship exhaust pose a serious threat to the environment and human health. In this study, various manganese oxide (MnO x ) samples with different physical and chemical structures were prepared using template, precipitation, ball milling, calcination, and microwave methods for the desulfurization of ship exhaust. The MnO x samples were characterized intensively through scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller analysis. The desulfurization performance was measured via thermogravimetry, and the desulfurization mechanism of the different MnO x samples was investigated. Results showed that the desulfurization performance of MnO x was determined by the comprehensive influence of the material’s pore structure, specific surface area, crystal structure, Mn valence content, and reaction temperature. The pore structure in MnO x considerably affected the desulfurization performance of MnO x . In our experiment, tp-MnO x prepared using the template method presented a rich 3D pore structure, a large specific surface area, and excellent desulfurization performance. At 400 °C, the average SO 2 capture rate of tp-MnO x in the first hour was 0.283 g SO2 /g material ·h. The highest SO 2 capture rate of tp-MnO x was 0.694 g SO2 /g material observed at 500 °C.
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
CHINESE JOURNAL OF CATALYSIS
·
2014
·
IF 1.552
Zhongyi An,Yuqun Zhuo,Chao Xu,Changhe Chen
Mn-based catalysts impregnated on TiO 2 with different crystalline phases (rutile (R), anatase (A), and P25 (P)) were studied for the oxidation of NO to NO 2 . 10%MnO x /TiO 2 (P) was the most active catalyst, giving 83% of NO conversion at 300 °C and a GHSV of 20000 h −1 . The catalyst activities were in the order MnO x /TiO 2 (P) > MnO x /TiO 2 (A) > MnO x /TiO 2 (R). The catalysts were characterized by X-ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, H 2 temperature-programmed reduction, and O 2 temperature-programmed desorption. Compared to anatase and rutile, P25 gave better dispersion of MnO x on the support surface, suppressed the agglomeration of catalyst particles, and also produced more Mn 2 O 3 , which was more active for the oxidation of NO. In addition, P25 enhanced the reduction of MnO x , especially for Mn 2 O 3 , and the formation of easily desorbed O 2 − generated from the Mn 3+ –O bond.
研究领域:
催化化学
·
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yunhe Li,Hua Li,Siyuan Jiang,Yuerong Zhou,Dongran Cao,Xinrong Che,Ying Yang,Jiangwei Shang,Xiuwen Cheng
Adsorption plays a critical role in eliminating antibiotics in wastewater, so it is urgent to develop an effective adsorbent in the application. Palygorskite exhibits enormous potential in the field of adsorption. In this study, palygorskite was modified by MnO x into a suitable and efficient adsorbent by a simple method, and they were used for the application and comparison of adsorbing fluoroquinolone antibiotics from aqueous solution. The surface chemical properties of adsorbents were characterized by different analytical techniques, and the results were used to analyze the corresponding adsorption interactions. Statistical physics calculations were performed to explain the physical and chemical parameters involved in FQs adsorption mechanism. The highest adsorption efficiency was achieved at pH 3, and the maximum adsorption capacities of MnO x @Pal for CIP, ENR, LFX and LOM were 51.48 mg · g −1 , 40.46 mg · g −1 , 55.16 mg · g −1 and 52.13 mg · g −1 , respectively. Antibiotics adsorption mechanism of adsorbent is mainly due to electrostatic interaction and hydrogen bonding. The adsorbent can be desorbed more easily using NaOH solutions. This adsorbent is expected to be used to treat wastewater contaminated by fluoroquinolone antibiotics.
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
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