Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction

Qiu, Xiaoyu; Yan, Xiaohong; Pang, Huan; Wang, Jingchun; Sun, Dongmei; Wei, Shaohua; Xu, Lin; Tang, Yawen

doi:10.1002/advs.201801103

Cited by 97 publications

(61 citation statements)

References 43 publications

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“…These conventional methods can produce a few layers or even a single layer of graphene, but they are also often susceptible to stacking and aggregation, resulting in a decrease in actual performance. Various special preparation strategies and structures have been reported to prevent the stacking and agglomeration of graphene . In these reports, the design of converting 2D flake graphene into various 3D structures with reasonable design with the help of specific equipment and templates is considered to be an effective solution.…”

Section: Introductionmentioning

confidence: 99%

Nickel‐Catalyzed Synthesis of 3D Edge‐Curled Graphene for High‐Performance Lithium‐Ion Batteries

Zhang

et al. 2019

Adv Funct Materials

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Effectively preventing graphene stacking and maintaining ultrathin layers remains a significant research effort for graphene preparation and applications. In this paper, a novel synthetic strategy based on catalyst migration on the surface of a salt template to control the growth of graphene is used to prepare 3D edge‐curled graphene (3D ECG). Under the synergistic effect of the steric hindrance and the migration of the Ni catalyst, 3D ECG forms a special structure in which the intermediate portion is flat and the edge is curled. The resultant unique structure not only effectively prevents the close stacking and aggregation of graphene, but also significantly improves its lithium storage performance. As an anode for lithium ion batteries, the reversible specific capacity can reach 907.5 and 347.8 mAh g−1 at the current density of 0.05 and 5.0 A g−1. Even after 1000 cycles, the specific capacity of 3D ECG can still be maintained at 605.2 mAh g−1 at a current density of 0.5 A g−1, demonstrating excellent rate performance and cycle performance. This new synthesis strategy and unique edge‐curled structure can be used to guide more design of 3D graphene materials for further functional applications.

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Section: Introductionmentioning

confidence: 99%

Nickel‐Catalyzed Synthesis of 3D Edge‐Curled Graphene for High‐Performance Lithium‐Ion Batteries

Zhang

et al. 2019

Adv Funct Materials

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“…Previous reports, which have focused on alkaline anion exchange membrane fuel cells, deeply investigated the ORR activity of Fe-N-C catalysts in alkaline environments, and found that optimizing the preparation procedure boosted catalytic activity and durability. Fe-N-C catalyst obtained by supporting FePc on graphene showed a ORR peak potential in the 0.7-0.84 V vs. RHE in an alkaline environment [22,62,63]. Oliveira et al investigated ORR behaviour in an alkaline electrolyte of FeN 4 macrocycles supported over carbon nanotubes and carbon spheres via a wet impregnation strategy.…”

Section: Contextualization Into Existing Literaturementioning

confidence: 99%

Iron-Based Electrocatalysts for Energy Conversion: Effect of Ball Milling on Oxygen Reduction Activity

et al. 2020

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In this work, we synthesized new materials based on Fe(II) phthalocyanine (FePc), urea and carbon black pearls (BP), called Fe-N-C, as electrocatalysts for the oxygen reduction reaction (ORR) in neutral solution. The electrocatalysts were prepared by combining ball-milling and pyrolysis treatments, which affected the electrochemical surface area (ECSA) and electrocatalytic activity toward ORR, and stability was evaluated by cyclic voltammetry and chronoamperometry. Ball-milling allowed us to increase the ECSA, and the ORR activity as compared to the Fe-N-C sample obtained without any ball-milling. The effect of a subsequent pyrolysis treatment after ball-milling further improved the electrocatalytic stability of the materials. The set of results indicated that combining ball-milling time and pyrolysis treatments allowed us to obtain Fe-N-C catalysts with high catalytic activity toward ORR and stability which makes them suitable for microbial fuel cell applications.

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“…The environmental pollution and energy crises have led to great interest in the research and development of environmentally friendly and highly efficient devices that can alleviate these problems . Liquid fuel cells (LFCs) can convert the chemical energy of liquid fuel directly into electrical energy, and therefore, their efficiency is not limited by the Carnot cycle .…”

Section: Introductionmentioning

confidence: 99%

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

Sun

2020

ChemSusChem

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In recent years, research efforts have been focused on the design and fabrication of highly efficient catalysts for liquid fuel cells, because the use of these cells is an important approach for alleviating environmental pollution and energy crises. However, the limitations of the catalytic performance of industrial Pt/C have strongly hindered the development of these fuel cells. The catalyst morphology has a strong impact on its performance; nanostructured catalysts are preferred as they offer large specific surface area and more exposed active centers. In view of this, many catalysts with unique structures have been synthesized in recent years, all of which show excellent catalytic performance characteristics. Despite these achievements, few efforts have been made to survey this field comprehensively. Herein, the recent advances in catalysts for liquid fuel cells are summarized, with a focus on noble metal catalysts with unique morphologies such as nanowires, nanosheets, and assembly structures. Their formation mechanisms are discussed critically. The relationship between the unique morphologies and excellent performance of these catalysts is also explored. This work may provide guidelines for the further development of liquid fuel cells.

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Isolated Fe Single Atomic Sites Anchored on Highly Steady Hollow Graphene Nanospheres as an Efficient Electrocatalyst for the Oxygen Reduction Reaction

Cited by 97 publications

References 43 publications

Nickel‐Catalyzed Synthesis of 3D Edge‐Curled Graphene for High‐Performance Lithium‐Ion Batteries

Nickel‐Catalyzed Synthesis of 3D Edge‐Curled Graphene for High‐Performance Lithium‐Ion Batteries

Iron-Based Electrocatalysts for Energy Conversion: Effect of Ball Milling on Oxygen Reduction Activity

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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