Recent Progress on Fe/N/C Electrocatalysts for the Oxygen Reduction Reaction in Fuel Cells

Liu, Jing; Li, Erling; Ruan, Mingbo; Song, Ping; Xu, Weilin

doi:10.3390/catal5031167

Cited by 74 publications

(39 citation statements)

References 114 publications

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“…The Tafel analysis depicted in Figure a reveals a slope of 60–62 mV/dec, indicating a good control over O 2 mass transport and excluding possible artefacts often observed in thick film electrodes . Very interesting results have been reported for Fe‐based electrocatalysts based on either bulk or electrodeposited Fe obtained by pyrolysis of appropriate iron precursors or solvothermal approaches also using different C‐based supports, and for mixtures of Fe and other transition metals . However, such a high activity displayed by an iron‐based catalyst Fe(np)/nCs is unprecedented.…”

Section: Methodsmentioning

confidence: 90%

From Food Waste to Efficient Bifunctional Nonprecious Electrocatalyst

Hof

Valenti

Huang

et al. 2017

Chemistry A European J

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Synergy between graphitic nanocarbon, obtainable from food waste through cracking of biomethane, and iron oxide nanoparticles provides access to efficient bifunctional electro catalysts. Dissolution of potassium-intercalated graphitic nanocarbons yields graphenide solutions with calibrated, small lateral size-reduced graphenes that are used subsequently as reducing agents of iron metal salts. This results in the strong binding of small size (2-5 nm) nanoparticles on the carbon framework homogeneously within the composite material, accessibility of the catalytic centers, and good conductivity provided by the underlying carbon framework. The iron oxide nanocarbon electrocatalyst performances are highlighted by the overall overpotential of approximately 1 V needed to reach the benchmark threshold of 10 mA cm for the oxygen reduction reaction and the particular activity towards oxygen evolution reaction (η≈0.4 V at 10 mA cm ), comparable to that of the precious RuO and IrO catalysts. This iron oxide/nanocarbon electrocatalyst is versatile, remarkably active, stable, and truly sustainable.

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Section: Methodsmentioning

confidence: 90%

From Food Waste to Efficient Bifunctional Nonprecious Electrocatalyst

Hof

Valenti

Huang

et al. 2017

Chemistry A European J

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“…The Fe and N-doped carbon composites (Fe-N-C) are the most promising candidates, having comparable activity to Pt/C [4]. Liu et al reviewed the progress made in the past five years in the areas of Fe-N-C electrocatalysts for ORR and understanding the possible active sites in this type of catalyst [8]. The Fe-N-Cs prepared from Fe-doped zeolitic imidazolate frameworks (ZIFs) are among the most active ones in catalyzing the ORR [9].…”

Section: This Special Issuementioning

confidence: 99%

Electrocatalysis in Fuel Cells

Shao

2015

Catalysts

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“…The scheme of ZnÀair battery is shown in Figure 4a and it consists of Zn as the anode, Zirfon membrane infused with NaOH as the electrolyte and functionalized TiN or carbon pasted on the exposed side of the membrane as the air electrode. [49,50] The long-term stability clearly demonstrate the advantages of TiN over carbon, Figure 4c. [49,50] The long-term stability clearly demonstrate the advantages of TiN over carbon, Figure 4c.…”

mentioning

confidence: 93%

An All Solid‐State Zinc−Air Battery with a Corrosion‐Resistant Air Electrode

et al. 2018

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We illustrate an all solid-state ZnÀair battery by utilizing the ability of a titanium-nitride-functionalized molecular catalyst to mediate the oxygen reduction reaction by avoiding the parasitic corrosion chemistry and the hydroxide-holding capacity of the Zirfon membrane. The efficient ionic communication between the half-cell electrodes provided by the Zirfon membrane in combination with the chemical/electrochemical stability of the TiN-based air electrode ultimately led to an all solid-state and air-breathing battery possessing high durability and stability.Electrochemical energy storage and conversion devices such as batteries, fuel cells and supercapacitors have the potential to address global warming and alarming pollution due to their near zero emission power output. [1][2][3][4][5][6][7] MetalÀair batteries are new generation batteries which are anticipated to contribute to long driving range per charge compared to conventional metal ion batteries. [8][9][10][11][12] The air electrode architecture is expected to increase gravimetric energy storage capability of the device since oxygen in principle can be accessed from atmosphere circumventing the storage of oxidant on board the device. [13][14][15] Though non aqueous Li air batteries are being pursued intensely across the world, aqueous ZnÀair batteries are much evolved and even used in commercial hearing aid devices. [16][17][18][19][20][21][22][23][24] However, oxygen reduction reaction (ORR), the cathodic halfcell reaction in air batteries often require precious metal based electrocatalyst to catalyze the 4 electron scission of molecular oxygen. [25][26][27][28][29] Usually Pt is supported on carbon which is known to undergo extensive corrosion in presence of oxygen and especially peroxide, the 2 electron product of ORR. [30][31][32] Pt is also known to catalyze carbon corrosion resulting in sintering and agglomeration of Pt nanoparticles and ultimately to the loss of precious metals. [33,34] We demonstrate that by replacing carbon with conducting titanium nitride (TiN), an extremely corrosion resistant as well as chemically stable material used in aberration industry, [35][36][37] carbon corrosion and its negative consequences can be addressed at the air electrode of metalair batteries. Further, we show a strategy for tuning the catalytic activity of this promising corrosion resistant catalytic support by simple diazotization reaction. [38] We have exploited the base reservoir capability of Zirfon PERL UTP 500 membrane for ionic communication between the half-cells. [39,40] To develop an all solid-state metalÀair battery. The results demonstrate that TiN based catalytic system outperforms carbon based catalysts in terms of long-term stability and durability ultimately leading to an all solid-state ZnÀair battery possessing a corrosion resistant air electrode.TiN particles were flake like with irregular morphology, scanning electron microscopic image, Figure 1a. Energy dispersive X-ray (EDX), Figure 1b, clearly indicates the constituent elements are m...

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Recent Progress on Fe/N/C Electrocatalysts for the Oxygen Reduction Reaction in Fuel Cells

Cited by 74 publications

References 114 publications

From Food Waste to Efficient Bifunctional Nonprecious Electrocatalyst

From Food Waste to Efficient Bifunctional Nonprecious Electrocatalyst

Electrocatalysis in Fuel Cells

An All Solid‐State Zinc−Air Battery with a Corrosion‐Resistant Air Electrode

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