Controlling active sites of Fe–N–C electrocatalysts for oxygen electrocatalysis

Kim, Mi-Ju; Kim, Sungjin; Park, Ji Eun; Hwang, Chan‐Cuk; Lee, Seunggyeong; Kang, Sun Kil; Jung, Dae-Sung; Cho, Yong‐Hun; Kim, Jaekook; Lee, Kug‐Seung; Sung, Yung‐Eun

doi:10.1016/j.nanoen.2020.105395

Cited by 41 publications

(42 citation statements)

References 41 publications

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“…Here, Me-Phenanthroline complexes were used as the precursors, 19 and Ketjen black was added to prevent these complexes' aggregation during heating. 20 After rapid carbonization at a 60 A DC-current, the obtained carbon catalysts were denoted as Ni/NC (from Ni-Phenanthroline+Ketjen black), Fe/NC (from Fe-Phenanthroline+Ketjen black), and FeNi/NC (from Fe/Ni-Phenanthroline+Ketjen black). Details about the precursor preparations and rapid carbonizations can be found in the experimental section.…”

Section: Resultsmentioning

confidence: 99%

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Huang

Wang

et al. 2022

CCS Chem

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Section: Resultsmentioning

confidence: 99%

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Huang

Wang

et al. 2022

CCS Chem

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“…In the synthesis of general M-N-C catalysts, many low-cost and earth-abundant metals (such as Fe, Co, Ni, Cu, Mn, and Zn) precursor can easily translate into metal oxides/(oxy)hydroxides, sulfides, phosphates, nitrides, carbides, and perovskites, because of the spontaneous aggregation of metal atoms. [288][289][290][291][292][293][294] It is still a bottleneck to precisely synthesize high-site-density SACs with various and controllable configuration of central atoms. Furthermore, improving intrinsic activity toward ORR and realizing structure-performance relationship are fundamental for the development of SACs.…”

Section: Technical Methodsmentioning

confidence: 99%

Recent Developments of Microenvironment Engineering of Single‐Atom Catalysts for Oxygen Reduction toward Desired Activity and Selectivity

Huang

Tang

et al. 2021

Adv Funct Materials

108

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Oxygen reduction reaction (ORR) is an essential process for sustainable energy supply and sufficient chemical production in modern society. Singleatom catalysts (SACs) exhibit great potential on maximum atomic efficiency, high ORR activity, and stability, making them attractive candidates for pursuing next-generation catalysts. Despite substantial efforts being made on building diversiform single-atom active sites (SAASs), the performance of the obtained catalysts is still unsatisfactory. Fortunately, microenvironment regulation of SACs provides opportunities to improve activity and selectivity for ORR. In this review, first, ORR mechanism pathways on N-coordinated SAAS, electrochemical evaluation, and characterization of SAAS are displayed. In addition, recent developments in tuning microenvironment of SACs are systematically summarized, especially, strategies for microenvironment modulation are introduced in detail for boosting the intrinsic 4e − /2e − ORR activity and selectivity. Theoretical calculations and cutting-edge characterization techniques are united and discussed for fundamental understanding of the synthesis-construction-performance correlations. Furthermore, the techniques for building SAAS and tuning their microenvironment are comprehensively overviewed to acquire outstanding SACs. Lastly, by proposing perspectives for the remaining challenges of SACs and infant microenvironment engineering, the future directions of ORR SACs and other analogous procedures are pointed out.

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“…For example, Sung et al rationally manifested the Fe/C ratio to fabricate the coexisting FeN x and Fe@C active sites on carbon materials (FeNC), which realized outstanding catalytic activity for ORR. 305 FeNC as a cathode for AEMFCs displayed a maximum power density of 526 mW cm À2 (Figure 9d) with a low loading of 0.5 mg cm À2 due to the superb intrinsic activity, and this output even succeeded the Pt catalyst under the same loading. Meanwhile, compared with the Pt catalyst, FeNC manifested a lower charge-transfer resistance at a current density of 0.1 mA cm À2 , emphasizing its excellent intrinsically catalytic activity.…”

Section: Aemfcsmentioning

confidence: 99%

“…In addition, an appropriate combination of various active sites was also experimentally verified to be capable to enhance the catalytic activity and develop high‐performance cathode materials for AEMFCs application. For example, Sung et al rationally manifested the Fe/C ratio to fabricate the coexisting FeN x and Fe@C active sites on carbon materials (FeNC), which realized outstanding catalytic activity for ORR 305 . FeNC as a cathode for AEMFCs displayed a maximum power density of 526 mW cm −2 (Figure 9d) with a low loading of 0.5 mg cm −2 due to the superb intrinsic activity, and this output even succeeded the Pt catalyst under the same loading.…”

Section: Applications In Energy Devicesmentioning

confidence: 99%

Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

Lei

Sathish

Liu

et al. 2022

EcoMat

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Single-metal-atom catalysts (SMACs) with the merits of maximum atom utilization, peculiar electronic structure, and adjustable coordination environment, have emerged as the rising stars. They are not only regarded as the promising electrocatalysts, but also show unconventionally excellent alkali storage, thus enabling them for energy devices. In this work, we review the up-to-date progress of single metal atom catalysts including the detailed synthetic strategies and all sorts of applications in energy storage and conversion. In addition, we also discuss intrinsic catalytic effects, degradation mechanism, modulation approaches, support structure design, current challenges, and potential development trends. This work may shed light on developing high-performance SMACs using a variety of strategies for catalytic and energy applications.

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Controlling active sites of Fe–N–C electrocatalysts for oxygen electrocatalysis

Cited by 41 publications

References 41 publications

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Highly Dispersive Metal Atoms Anchored on Carbon Matrix Obtained by Direct Rapid Pyrolysis of Metal Complexes

Recent Developments of Microenvironment Engineering of Single‐Atom Catalysts for Oxygen Reduction toward Desired Activity and Selectivity

Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

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