Recent advances of Fe–N–C pyrolyzed catalysts for the oxygen reduction reaction

Muñoz‐Becerra, Karina; Venegas, Ricardo; Duque, Luis; Zagal, José H.; Recio, Francisco J.

doi:10.1016/j.coelec.2020.08.006

Cited by 30 publications

(22 citation statements)

References 85 publications

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“…Until, a number of reviews have summarized M-N-C electrocatalysts and their typical applications in ORR and OER. [72][73][74][75][76][77][78][79][80][81][82][83][84][85][86] Whereas, no detailed review is available in the literature on the synthetic strategy, characterization, and comprehensive applications in the typical electrocatalytic reactions from the coordination and configuration viewpoint of M-N-C, as far as we know. In this review, we provide a comprehensive summary of the latest development of M-N-C catalysts with different coordination configurations for typical energy-related electrocatalytic applications in ORR, OER, HER, and CO2RR (Figure 1).…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…The different iron species present in the catalysts were characterized by Mössbauer spectroscopy. The spectra were recorded at room temperature in triangular mode using a conventional spectrometer with a 50-mCi 57 Co (Rh) source. The spectral analyses were performed using the nonlinear adjustment fit of the NORMOS program.…”

Section: Mössbauer Spectroscopy Detailsmentioning

confidence: 99%

“…[29] Therefore, despite the lower influence of the Fe 3 C in the catalytic activity in our catalysts, their presence seems to be critical for the production of H 2 O 2 , which is detrimental for the long-term stability in operando conditions since the carbon matrix can be oxidized, inducing demetallation. [42,57,76] The spin and charge density redistribution caused by the inclusion of N-pyridinic functions [38,40] has a special role in the selectivity of the reaction. The N pyr functions have been identified as Lewis base sites, modifying the neighboring carbons [36] turning them into secondary active sites where the adsorption of oxygen and its derivatives in acid media is favored.…”

Section: Chemelectrochemmentioning

confidence: 99%

Fe₃O₄ Templated Pyrolyzed Fe−N−C Catalysts. Understanding the role of N‐Functions and Fe₃C on the ORR Activity and Mechanism

et al. 2022

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Pyrolyzed non-precious metal catalysts have been proposed as an alternative to substitute the expensive and scarce noble metal catalysts in several conversion energy reactions. For the oxygen reduction reaction (ORR), the pyrolyzed catalyst MÀ NÀ C (M: Fe or Co) presents remarkable catalytic activity in acid and alkaline media. These pyrolyzed materials show a high heterogeneity of active sites being the most active in the MNx moieties. The activity and stability of these catalysts are also conditioned by other structural parameters such as the area, the N-doping, and by the presence of metal particles. In this study, we explore the use of Fe 3 O 4 nanoparticles as templates and as iron sources to synthesize FeÀ NÀ C. The best perform-ance for the ORR in acidic media was reached with the catalysts using nanoparticles covered by PANI and iron salts as the precursor, with an onset potential of 0.85 vs. RHE and a direct 4-electrons mechanism. We corroborated the use of the catalysts' redox potential as reactivity descriptors and discussed the detrimental role of the presence of Fe 3 C metallic particles in the mechanism. Based on the experimental results, we performed DFT calculations to explore the influence of N-doped species on the electronic density of the iron centers of FeN4 active sites, and we propose a theoretical model for increasing the activity based on the distance and ratio of N-doping to iron center.

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“…Moreover, the long‐term stability of Pt is restricted due to its inferior tolerance against carbon monoxide, methanol and other pollutants naturally present in the atmosphere [32,33] . To address this issue, many efforts have been made to develop PGM‐free ORR electrocatalysts utilizing earth‐abundant metals by biomimicking or bioinspired approaches [34–36] . PGM‐free ORR electrocatalysts contain several different active sites with nitrogen and a given transition metal.…”

Section: Introductionmentioning

confidence: 99%

“…The scope of this Minireview is limited to the very recent research developments in the domain of plastic waste‐derived ORR electrocatalysts. Existing literature related to ORR mechanisms and reaction pathways [107— 110] and electrocatalysts [36,88,111–115] is reported for acidic media and alkaline media for PEMFCs and AEMFCs, respectively. As mentioned before, the electronic pathway of ORR reaction differs at different pH of the electrolyte [116] .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Waste Plastic Transformation into Valuable Platinum‐Group Metal‐Free Electrocatalysts for Oxygen Reduction Reaction

2021

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Plastic waste causes severe environmental hazards, owing to inadequate disposal and limited recycling. Under the framework of circular economy, there are urgent demands to valorize plastic waste more safely and sustainably. Therefore, much scientific interest has been witnessed recently in plastic waste‐derived electrocatalysts for the oxygen reduction reaction (ORR), where the plastic waste acts as a cost‐effective and easily available precursor for the carbon backbone. The ORR is not only a key efficiency indicator for fuel cells and metal–air batteries but also a major obstacle for their commercial realization. The applicability of the aforementioned electrochemical devices is limited, owing to sluggish ORR activity and expensive platinum‐group metal electrocatalysts. However, waste‐derived ORR electrocatalysts are emerging as a potential substitute that could be inexpensively fabricated upon the conversion of plastic waste into active materials containing earth‐abundant transition metals. In this Minireview, very recent research developments regarding plastic waste‐derived ORR electrocatalysts are critically summarized with a prime focus on the followed synthesis routes, physicochemical properties of the derived electrocatalysts, and their ultimate electrochemical performance. Finally, the prospects for the future development of plastic waste‐derived electrocatalysts are discussed.

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Recent advances of Fe–N–C pyrolyzed catalysts for the oxygen reduction reaction

Cited by 30 publications

References 85 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

Fe₃O₄ Templated Pyrolyzed Fe−N−C Catalysts. Understanding the role of N‐Functions and Fe₃C on the ORR Activity and Mechanism

Recent Advances in Waste Plastic Transformation into Valuable Platinum‐Group Metal‐Free Electrocatalysts for Oxygen Reduction Reaction

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Recent advances of Fe–N–C pyrolyzed catalysts for the oxygen reduction reaction

Cited by 30 publications

References 85 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

Fe3O4 Templated Pyrolyzed Fe−N−C Catalysts. Understanding the role of N‐Functions and Fe3C on the ORR Activity and Mechanism

Recent Advances in Waste Plastic Transformation into Valuable Platinum‐Group Metal‐Free Electrocatalysts for Oxygen Reduction Reaction

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Fe₃O₄ Templated Pyrolyzed Fe−N−C Catalysts. Understanding the role of N‐Functions and Fe₃C on the ORR Activity and Mechanism