3D flower-like MnCO3 microcrystals: evolution mechanisms of morphology and enhanced electrochemical performances

Mu, Yanlin; Wang, Li; Zhao, Yan; Liu, Mengjiao; Zhang, Wei; Wu, Jiangtao; Lai, Xin; Fan, Guangyin; Bi, Jian; Gao, Daojiang

doi:10.1016/j.electacta.2017.08.104

Cited by 66 publications

(21 citation statements)

References 35 publications

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“…Whereas, with increasing Mn/Ni molar ratios, the areas of desorption peaks enhanced markedly in the temperature zone of 50–750 °C, verifying the further increment of acid quantity, which was further confirmed by the total amount data of NH 3 desorption in Table . It was noteworthy that Ni 1 Mn 3 Ti 1 ‐LDO catalyst depicted an obvious decomposition desorption peak at 350–450 °C, which might be ascribed to the decomposition of MnCO 3 , and the existence of the MnCO 3 was revealed in XRD analysis in Figure . Moreover, the peaks at 50–300 °C and above 300 °C can be correspondingly attributed to the weak acid sites and strong acid sites.…”

Section: Resultsmentioning

confidence: 97%

NOx Removal Performance Optimization of NiMnTi Mixed Oxide Catalysts by Tuning the Redox Capability

et al. 2019

ChemCatChem

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A series of Ni4‐xMnxTi1Oy mixed metal oxides (Ni4‐xMnxTi1‐LDO) catalysts originated from layered double hydroxides (LDHs) were fabricated and evaluated in the selective catalytic reduction of NO with NH3 (NH3‐SCR). To optimize the denitrification performance, the redox capability of catalysts was adjusted by calcining the Ni4‐xMnxTi1‐LDHs precursors with different Mn loading at different temperatures. The results revealed that calcination temperature was the secondary factor while the molar ratio of Mn to Ni was the main factor for influencing the redox properties. Among Ni4‐xMnxTi1‐LDO catalysts, the Ni2Mn2Ti1‐LDO catalyst afforded the optimal DeNOx behavior with above 90 % NOx conversion and 95 % selectivity of N2 as well as superior SO2 resistance in the wide temperature region of 150–360 °C. Multiple characterizations indicated that exceptional catalytic performance of Ni2Mn2Ti1‐LDO catalyst was highly dependent on the suitable redox capability resulted from moderate concentration of Ni3+, Mn4+ and chemisorbed oxygen Oβ in catalysts surface.

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Section: Resultsmentioning

confidence: 97%

NOx Removal Performance Optimization of NiMnTi Mixed Oxide Catalysts by Tuning the Redox Capability

et al. 2019

ChemCatChem

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“…For example, MnCO 3 porous microspheres with the mean diameter of 2.6 µm demonstrated both high capacity and excellent cycling performance comparable to their bulk counterparts . 3D flower‐like MnCO 3 microcrystals (Figure a and Figure b) exhibit specific capacity of 384 mAh g –1 at 0.2 C after 200 cycles, showing the 300 % increase over the spherical MnCO 3 microcrystals (Figure c) . Notably, hierarchical MnCO 3 microdumbbells (Figure d) were first designed and synthesized from a reflux method, which possessed a high surface area of 45 m 2 g –1 , supplying more contact area between the active materials and electrolyte.…”

Section: Applications In Libsmentioning

confidence: 99%

Section: Applications In Libsmentioning

confidence: 99%

Recent Progress and Challenges of Micro‐/Nanostructured Transition Metal Carbonate Anodes for Lithium Ion Batteries

Guo

et al. 2018

Eur J Inorg Chem

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Lithium ion batteries (LIBs) have attracted tremendous interest in electric vehicles and smart grids, due to their inherent advantages of being powerful and environmentally benign. However, their performance is presently far from meeting the continually increasing demands for long-durance mileage and long lifespan. High-performance anodes with high specific capacity and long cyclability are of great significance to high-energy/high-power lithium ion batteries; however, there are still great challenges in advancing new materials beyond commercial graphite, whose capacity is low and limited by the theoretical values (372 mAh g -1 ). That is why scientists are continually searching for satisfying anode alternatives to graphite. [a] 4515 Figure 13. SEM and TEM images of (a) Mn 0.2 Fe 0.8 CO 3 /r-GO composites, (b, c) Co 0.2 Mn 0.8 CO 3 /graphene composites, and (d) Zn 0.12 Co 0.88 CO 3 /CNT composites. Reprinted with permission from ref. [62] Copyright 2017 Elsevier. The superiority of graphene (e, f and g) or CNT hybrid composites (h) indicated by the enhanced electrochemical behaviors. Reprinted with permission from ref. [67,68]

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“…During the process of hydrothermal, SC is able to strongly chelate metal ions via its carboxylate groups (‐COOH) and hydroxyl group (‐OH). Indeed, the reduction of free metal ion concentration slows the nucleation and crystal growth of the precursor during hydrothermal treatment, thus affecting the final morphology of the product 20,21 . The use of SC is also advantageous because of its low cost, green, and pollution‐free of nature, as well as the fact that it has a certain degree of reducibility 22 .…”

Section: Introductionmentioning

confidence: 99%

Sodium citrate‐assisted synthesis of nano‐manganese oxide on carbon fiber for enhancing the mechanical and frictional performances of carbon fiber‐reinforced resin matrix composites

Zheng

Fei

Lian

et al. 2020

J of Applied Polymer Sci

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Aiming to enhance the carbon fiber (CF)/resin interfacial adhesion, this report describes the novel application of sodium citrate (SC) as an auxiliary reducing agent and surface regulator to control the morphology of nano‐manganese dioxide (MnO2) on the CF surface. The composites were fabricated by means of controlling the molar concentration ratio of SC to Mn source (0:1, 1:3, 1:2, and 1:1) in hydrothermal synthesis. The results reveal that MnO2 nanosheets on the CF surface become denser as the concentration of SC is 1/3 of Mn source, which makes advance to the surface roughness and surface energy of CF. Simultaneously, the tensile strength of as‐prepared composite is increased by 52.8%. The homologous friction coefficient tends to be high and stable and the wear volume is significantly reduced by 63.8 and 26.5% under the applied loads of 3 and 5 N in contrast with the original composites prepared without SC. As a result, it can be inferred that SC plays a crucial role in enhancing the interfacial bonding strength between the CF and matrix, providing insights into the interface control of CF‐reinforced resin matrix composites.

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3D flower-like MnCO3 microcrystals: evolution mechanisms of morphology and enhanced electrochemical performances

Cited by 66 publications

References 35 publications

NOx Removal Performance Optimization of NiMnTi Mixed Oxide Catalysts by Tuning the Redox Capability

NOx Removal Performance Optimization of NiMnTi Mixed Oxide Catalysts by Tuning the Redox Capability

Recent Progress and Challenges of Micro‐/Nanostructured Transition Metal Carbonate Anodes for Lithium Ion Batteries

Sodium citrate‐assisted synthesis of nano‐manganese oxide on carbon fiber for enhancing the mechanical and frictional performances of carbon fiber‐reinforced resin matrix composites

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