Hollow spherical La0.8Sr0.2MnO3 perovskite oxide with enhanced catalytic activities for the oxygen reduction reaction

Lu, Fanliang; Sui, Jing; Su, Jianmin; Jin, Chao; Shen, Ming; Yang, Ruizhi

doi:10.1016/j.jpowsour.2014.07.160

Cited by 73 publications

(36 citation statements)

References 20 publications

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“…For example, Xu et al have proposed porous La 0.75 Sr 0.25 MnO 3 nanotubes by electrospinning as electrocatalyst for lithiumeO 2 battery, which demonstrated ultrahigh charge and discharge capacities [17]. In our previous reports [23,27], we have synthesized urchinelike and hollow spherical LSM perovskite oxides with high specific surface area, which exhibit better catalytic performances than regular LSM particles. Therefore, it is necessary and important to investigate the structural design of LSM in order to improve its catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Microporous La0.8Sr0.2MnO3 perovskite nanorods as efficient electrocatalysts for lithium–air battery

Wang

Jin

et al. 2015

Journal of Power Sources

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h i g h l i g h t s LSM nanorods have been synthesized by a soft templates method. LSM nanorods have unique microporous structure with numerous defects. LSM nanorods exhibit enhanced bifunctional catalytic activities. LSM nanorods based Lieair batteries show enhanced electrochemical performances. Available online xxx Keywords: La 0.8 Sr 0.2 MnO 3 perovskite oxide Nanorods Micropore Catalyst Lithiumeair battery a b s t r a c tEfficient electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is the most critical factor to influence the performance of lithiumeair batteries. We present La 0.8 Sr 0.2 MnO 3 (LSM) perovskite nanorods as high active electrocatalyst fabricated via a soft template method for lithiumeair batteries. The aseprepared LSM nanorods are microporous with numerous defects and large surface area (20.6 m 2 g À1 ), beneficial to the ORR and OER in the discharge and charge processes, respectively. Lithiumeair batteries based on the microporous LSM nanorods electrocatalysts show enhanced electrochemical performances, including high first discharge specific capacity (6890 mAh g À1(electrode) at 200 mA g À1 ), low overpotential, good rate capability (up to 400 mA g À1 ), and cycle stability (only 1.1% voltage loss after 30 circles of specific capacity limit of 1000 mAh g À1 tested at 200 mA g À1 ). The improved performance might be due to the synergistic effect of the unique microporous and oneedimensional structure and numerous defects of the prepared LSM catalyst.

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Section: Introductionmentioning

confidence: 99%

Microporous La0.8Sr0.2MnO3 perovskite nanorods as efficient electrocatalysts for lithium–air battery

Wang

Jin

et al. 2015

Journal of Power Sources

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“…Recently, Jin et al [20] have successfully synthesized an urchin-like La 0.8 Sr 0.2 MnO 3 perovskite oxide by co-precipitation method with urea as a precipitator, finding that the urchin-like La 0.8 Sr 0.2 MnO 3 perovskite oxide exhibits an encouraging catalytic activity for ORR and OER due to its novel morphology. Whereafter, Lu et al [21] have prepared a hollow spherical La 0.8 Sr 0.2 MnO 3 (HS-LSM) perovskite oxide using a new carbonate-template route, discovering that the HS-LSM showed high activity and stability for ORR in alkaline solution, outperforming the commercial Pt/C. Although these novel structural perovskite oxides could provide a larger active surface area with reactants relative to the bulk, the particle size and shape of the resulting perovskite oxides is hard to control owing to the complex overall procedures of the preparation methods.…”

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confidence: 99%

A modified sol–gel method for low-temperature synthesis of homogeneous nanoporous La1−x Sr x MnO3 with large specific surface area

Zhuang

Liu

Zeng

et al. 2015

J Sol-Gel Sci Technol

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A modified sol-gel (MSG) method was developed to synthesize perovskite La 1-x Sr x MnO 3 (x = 0.2, 0.4, 0.6, 0.8) with large specific surface area that allows for control of their particle size from the micrometer level to the nanometer level with novel nanoporous structure. The MSG method utilized carbon black (Vulcan XC-72R) as a poreforming material during the preparation process. Two important process parameters, the calcination temperature and the pore former material addition, were investigated to control the size of the La 1-x Sr x MnO 3 particles. The phase evolution of La 1-x Sr x MnO 3 powders was investigated by thermogravimetric analysis (TG/DSC) and X-ray diffraction pattern. The results showed that the pure La 0.6 Sr 0.4 MnO 3 phase has been obtained at about 550°C in air, which is lowered around 150°C comparing to conventional sol-gel method. In scanning electron microscope studied, it presented novel homogeneous nanoporous morphology with the average particle size from 30 to 100 nm. Based on the Brunauer-Emmett-Teller method analysis, the specific surface area of La 1-x Sr x MnO 3 was significantly influenced by the calcination temperature, the pore former material addition and the strontium content. The largest specific surface area of La 0.2 Sr 0.8 MnO 3 reached 114.3 m 2 /g. Graphical abstract

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“…[54] The hollow spherical La 0.8 Sr 0.2 MnO 3 exhibits high activity and stability for the ORR in alkaline solution. [54] The hollow spherical La 0.8 Sr 0.2 MnO 3 exhibits high activity and stability for the ORR in alkaline solution.…”

Section: Orr With Perovskitesmentioning

confidence: 99%

Hollow‐Structured Metal Oxides as Oxygen‐Related Catalysts

et al. 2018

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high overpotential and sluggish kinetics. Generally, Pt, IrO 2 , and RuO 2 noble metal catalysts have improved kinetics. But, the high cost and unsatisfactory long-term durability of noble-metal-based catalysts are the main limitations for large-scale commercial applications. Supplying flexible electronic structures, transition metal oxides are the optimal oxygen-related catalysts in which the adsorbents binding to metal cations (M) are neither too strong nor too weak. [9] With overall understanding of crystal structure for common transition metal oxides, it has been demonstrated that [MO 6 ] octahedral configuration effectively accelerates the charge transfer process during a redox reaction. [10] In the octahedral field, the transition metal 3d orbit will be split into e g and t 2g . The e g orbital directed toward an O 2 molecule overlaps the O-2p δ orbital more strongly than the overlap between the t 2g and O-2p π orbitals. It thereof determines the energy gained by both the adsorption/desorption of oxygen on transition metal ions. Furthermore, the hollow structure promotes their reaction kinetics and durability. [11,12] Here, we will focus on the hollow structures (spinels, perovskites, and rutiles) and their oxygenrelated catalysis properties. And general design strategies and precise fabrication of hollow-structured transition metal oxides for oxygen-related catalysis will be summarized. To simplify, the hollow structure discussed here is a system with independent inner voids and can be monodisperse. Advantage and Synthesis of Hollow Structures Importance of Hollow Structures in Oxygen-Related CatalysisA large surface area is critical for hollow structure in oxygenrelated catalysis. It can significantly increase the active sites and reduce the mass density of an energy conversion device. In some special systems, the consumption of co-catalysts (especially noble metal) could also be saved. [13] Meanwhile, large void size is another key feature for hollow structure. It will mitigate the effects of volume change, provide structural stability and enhance the metal-air battery cyclic performance. The interconnected channels will promote the mass transfer performance and enhance the rate capability. [14] In addition, the encapsulation ability of hollow structure can avoid catalyst poisoning and increase chemical and thermal stabilities. [15] With precise control of the geometric parameter (length, diameter, and shell thickness), a shortened charge transfer path is Metal oxide hollow structures with large surface area, low density, and high loading capacity have received great attention for energy-related applications. Acting as oxygen-related catalysts, hollow-structured transition metal oxides offer low overpotential, fast reaction rate, and excellent stability. Herein, recent progress in the oxygen-related catalysis (e.g., oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and metal-air batteries) of hollow-structured transition metal oxides is discussed. Through a comprehensive outline of hollo...

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Hollow spherical La0.8Sr0.2MnO3 perovskite oxide with enhanced catalytic activities for the oxygen reduction reaction

Cited by 73 publications

References 20 publications

Microporous La0.8Sr0.2MnO3 perovskite nanorods as efficient electrocatalysts for lithium–air battery

Microporous La0.8Sr0.2MnO3 perovskite nanorods as efficient electrocatalysts for lithium–air battery

A modified sol–gel method for low-temperature synthesis of homogeneous nanoporous La1−x Sr x MnO3 with large specific surface area

Hollow‐Structured Metal Oxides as Oxygen‐Related Catalysts

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