Fe3O4 nanoparticles encapsulated in single-atom Fe–N–C towards efficient oxygen reduction reaction: Effect of the micro and macro pores

Hu, Shuqi; Ni, Wenpeng; Yang, Daihui; Ma, Chao; Zhang, Jiaheng; Duan, Junfei; Gao, Yang; Zhang, Shiguo

doi:10.1016/j.carbon.2020.02.059

Cited by 107 publications

(53 citation statements)

References 74 publications

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“…[90] Nevertheless, the controlled synthesis of M-N-C catalysts with precisely coordinated configuration of metal and nitrogen (M-N x ) still remain an important and key issue. [91][92][93][94][95][96][97] In the following sections, the most recently developed synthetic strategies in constructing M-N-C catalysts with well-defined coordinated configuration of MN 4 , MN 2 , and others (MN 1 , MN 3 , MN 5 ) will be introduced (Table 1) and discussed in detail.…”

Section: Synthetic Strategiesmentioning

confidence: 99%

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

et al. 2021

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Metal-nitrogen-carbon (M-N-C) material with specifically coordinated configurations is a promising alternative to costly Pt-based catalysts. In the past few years, great progress is made in the studies of M-N-C materials, including the structure modulation and local coordination environment identification via advanced synthetic strategies and characterization techniques, which boost the electrocatalytic performances and deepen the understanding of the underlying fundamentals. In this review, the most recent advances of M-N-C catalysts with specifically coordinated configurations of M-N x (x = 1-6) are summarized as comprehensively as possible, with an emphasis on the synthetic strategy, characterization techniques, and applications in typical electrocatalytic reactions of the oxygen reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, CO 2 reduction reaction, etc., along with mechanistic exploration by experiments and theoretical calculations. Furthermore, the challenges and potential perspectives for the future development of M-N-C catalysts are discussed.

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Section: Synthetic Strategiesmentioning

confidence: 99%

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

et al. 2021

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“…[ 31,32 ] Besides, the Fe‐based catalysts with the iron species coated by carbon layers show an enhanced ORR activity due to the changed electron density of carbon surface by iron‐related cores. [ 33,34 ] Nevertheless, the introduction process of Fe species usually need to be treated at high temperature, thus they tend to aggregate together in large pieces, resulting in lower ORR performance and stability. In order to tune the distribution of Fe atoms, the typical approaches mostly center on the addition of applicable ligand (polyaniline, [ 35 ] pyrrole, [ 36 ] and dopamine, [ 37 ] etc.)…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic, Kinetic, and Mechanism Insights into the Oxygen‐Reduction Catalyzed Based on the Biomass‐Derived FeO_x@N‐Doped Porous Carbon Composites

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Chen

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et al. 2021

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A valid strategy for amplifying the oxygen reduction reaction (ORR) efficiency of non‐noble electrocatalyst in both alkaline and acid electrolytes by decorated with a layer of biomass derivative nitrogen‐doped carbon (NPC) is proposed. Herein, a top‐down strategy for the generally fabricating NPC matrix decorated with trace of metal oxides nanoparticles (FeOx NPs) by a dual‐template assisted high‐temperature pyrolysis process is reported. A high‐activity FeOx/FeNC (namely Hemin/NPC‐900) ORR electrocatalyst is prepared via simply carbonizing the admixture of Mg5(OH)2(CO3)4 and NaCl as dual‐templates, melamine and acorn shells as nitrogen and carbon source, hemin as a natural iron and nitrogen source, respectively. Owing to its unique 3D porous construction, large BET areas (819.1 m2∙g−1), and evenly dispersed active sites (FeNx, CN, and FeO parts), the optimized Hemin/NPC‐900 catalyst displays comparable ORR catalytic activities, remarkable survivability to methanol, and preferable long‐term stability in both alkali and acid electrolyte compared with benchmark Pt/C. More importantly, density function theory computations certify that the interaction between Fe3O4 nanoparticles and arm‐GN (graphitic N at armchair edge) active sites can effectually promote ORR electrocatalytic performance by a lower overpotential of 0.81 eV. Accordingly, the research provides some insight into design of low‐cost non‐precious metal ORR catalysts in theory and practice.

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“…Among the catalysts tested, Fe 3 O 4 /Fe 3 N/Fe-N-C@PC-2.5 presents the best ORR activity (E 1/2 = 0.90 V), far exceeding the activity of 20% Pt/C (E 1/2 = 0.84 V). The excellent ORR activity of Fe 3 O 4 /Fe 3 N/Fe-N-C@PC-2.5 is comparable to those of a number of Fe-based electrocatalysts (Table S3) [26,32,[40][41][42][43][44][45]. In Fig.…”

Section: Electrochemical Tests and Catalytic Activity Analysesmentioning

confidence: 54%

Iron polyphthalocyanine-derived ternary-balanced Fe3O4/Fe3N/Fe-N-C@PC as a high-performance electrocatalyst for the oxygen reduction reaction

et al. 2021

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The oxygen reduction reaction (ORR) is the cornerstone reaction of the cathode in metal-air batteries; however, slow kinetics requires high-performance catalysts to promote the reaction. Polyphthalocyanine (PPc) has a typical chemical cross-linking structure and uniformly dispersed metal active sites, but its poor activity and conductivity limit its applications as an ORR catalyst. Herein, a manageable and convenient strategy is proposed to synthesize ternary ORR catalysts through the low-temperature pyrolysis of FePPc. The optimal catalyst, Fe 3 O 4 /Fe 3 N/Fe-N-C@PC-2.5, exhibits excellent ORR activity in alkaline solution with a half-wave potential of 0.90 V, which is significantly higher than that of commercial 20% Pt/C (0.84 V). Electrochemical tests and extended X-ray absorption fine structure spectroscopy reveal that the superior ORR activity of Fe 3 O 4 /Fe 3 N/Fe-N-C@PC-2.5 could be ascribed to the balance of its ternary components (i.e., Fe 3 O 4 , Fe 3 N, and Fe-N 4 species). A Zn-air battery incorporating Fe 3 O 4 /Fe 3 N/Fe-N-C@PC-2.5 as an air cathodic catalyst delivers a high open-circuit voltage and peak power density. During galvanostatic discharge, the battery demonstrates a specific capacity of 815.7 mA h g −1 . The facile strategy of using PPc to develop high-performance composite electrocatalysts may be expanded to develop new types of catalysts in the energy field.

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Fe3O4 nanoparticles encapsulated in single-atom Fe–N–C towards efficient oxygen reduction reaction: Effect of the micro and macro pores

Cited by 107 publications

References 74 publications

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

Electrocatalytic, Kinetic, and Mechanism Insights into the Oxygen‐Reduction Catalyzed Based on the Biomass‐Derived FeO_x@N‐Doped Porous Carbon Composites

Iron polyphthalocyanine-derived ternary-balanced Fe3O4/Fe3N/Fe-N-C@PC as a high-performance electrocatalyst for the oxygen reduction reaction

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Fe3O4 nanoparticles encapsulated in single-atom Fe–N–C towards efficient oxygen reduction reaction: Effect of the micro and macro pores

Cited by 107 publications

References 74 publications

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

Electrocatalytic, Kinetic, and Mechanism Insights into the Oxygen‐Reduction Catalyzed Based on the Biomass‐Derived FeOx@N‐Doped Porous Carbon Composites

Iron polyphthalocyanine-derived ternary-balanced Fe3O4/Fe3N/Fe-N-C@PC as a high-performance electrocatalyst for the oxygen reduction reaction

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Electrocatalytic, Kinetic, and Mechanism Insights into the Oxygen‐Reduction Catalyzed Based on the Biomass‐Derived FeO_x@N‐Doped Porous Carbon Composites