Correction: Nanocrystalline Fe–Fe<sub>2</sub>O<sub>3</sub> particle-deposited N-doped graphene as an activity-modulated Pt-free electrocatalyst for oxygen reduction reaction

Dhavale, Vishal M.; Singh, Santosh K.; Nadeema, Ayasha; Gaikwad, Sachin S.; Kurungot, Sreekumar

doi:10.1039/c7nr90179h

Cited by 5 publications

(9 citation statements)

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“…32 Finally, AEMFCs that mount PGM-free ECs at both the anode and the cathode demonstrate power density values on the order of ∼50 mW• cm −2 . 29,33,34 Although these values are rather promising, they are still at least ∼10−15 times lower in comparison with the one demonstrated by PGM-based ORR ECs. Thus, the development of advanced, highly performing PGM-free ORR ECs, coupled with a sufficient durability in an alkaline medium, is an objective of utmost importance 35 which is, however, far from being achieved.…”

Section: ■ Introductionmentioning

confidence: 84%

Toward Pt-Free Anion-Exchange Membrane Fuel Cells: Fe–Sn Carbon Nitride–Graphene Core–Shell Electrocatalysts for the Oxygen Reduction Reaction

et al. 2018

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We report on the development of two new Pt-free electrocatalysts (ECs) for the oxygen reduction reaction (ORR) based on graphene nanoplatelets (GNPs). We designed the ECs with a core-shell morphology, where a GNP core support is covered by a carbon nitride (CN) shell. The proposed ECs present ORR active sites that are not associated to nanoparticles of metal/alloy/oxide, but are instead based on Fe and Sn sub-nanometric clusters bound in coordination nests formed by carbon and nitrogen ligands of the CN shell. The performance and reaction mechanism of the ECs in the ORR are evaluated in an alkaline medium by cyclic voltammetry with the thin-film rotating ring-disk approach and confirmed by measurements on gas-diffusion electrodes. The proposed GNP-supported ECs present an ORR overpotential of only ca. 70 mV higher with respect to a conventional Pt/C reference EC including a XC-72R carbon black support. These results make the reported ECs very promising for application in anion-exchange membrane fuel cells. Moreover, our methodology provides an example of a general synthesis protocol for the development of new Pt-free ECs for the ORR having ample room for further performance improvement beyond the state of the art.

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Section: ■ Introductionmentioning

confidence: 84%

Toward Pt-Free Anion-Exchange Membrane Fuel Cells: Fe–Sn Carbon Nitride–Graphene Core–Shell Electrocatalysts for the Oxygen Reduction Reaction

et al. 2018

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“…After calibration, the Fe is deconvoluted to Fe(III) 2p 3/2 at 711.66 eV, as shown in Figure 3c. 13,14 In the second CVD process, a hexane solution of Fe 3 O 4 nanoparticles was spincoated on the surface of rebar graphene. Under the flow of CH 4 /H 2 gas at 850 °C, most of the Fe 3 O 4 nanoparticles were reduced to Fe nanoparticles, which were used as the catalyst for CNO growth.…”

Section: Resultsmentioning

confidence: 99%

Rivet Graphene

Sha

Lee³

et al. 2016

ACS Nano

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Large-area graphene has emerged as a promising material for use in flexible and transparent electronics due to its flexibility and optical and electronic properties. The anchoring of transition metal nanoparticles on large-area single-layer graphene is still a challenge. Here, we report an in situ preparation of carbon nano-onion-encapsulated Fe nanoparticles on rebar graphene, which we term rivet graphene. The hybrid film, which allows for polymer-free transfer and is strong enough to float on water with no added supports, exhibits high optical transparency, excellent electric conductivity, and good hole/electron mobility under certain tensile/compressive strains. The results of contact resistance and transfer length indicate that the current in the rivet graphene transistor does not just flow at the contact edge. Carbon nano-onions encapsulating Fe nanoparticles on the surface enhance the injection of charge between rivet graphene and the metal electrode. The anchoring of Fe nanoparticles encapsulated by carbon nano-onions on rebar graphene will provide additional avenues for applications of nanocarbon-based films in transparent and flexible electronics.

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“…The existence of mixed valence of Fe ion was in favor of electron transfer during ORR. [36] Therefore, the ORR performance of FeFe 2 O 4 was affected by the presence and ratio of Fe 2 + and Fe 3 + . In addition, the smaller and more even the particles were the larger the specific surface area and the active sites exposed.…”

Section: Chemistryselectmentioning

confidence: 98%

“…3 um) and behaved poor ORR performance, including onset as well as half-wave potential. [35][36][37][38] In general, the chemical and physical properties of nanomaterials were strongly related to their size and morphology. [39][40][41][42][43][44] Therefore, it was necessary to reduce the size and high dispersion of iron oxide-based material to expose more ORR active sites.…”

Section: Introductionmentioning

confidence: 99%

High Dispersion FeFe₂O₄ nanoparticles synthesis and its Oxygen Reduction Reaction catalytic performance

et al. 2022

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By pyrolyzed the products from hydrothermal reaction of 1, 4, 5, 8-naphthalene tetramethyl anhydride, NaOH and FeSO 4 , the nanoparticles of FeFe 2 O 4 were produced, and then its electrochemical performance of oxygen reduction reaction (ORR) was evaluated in O 2 saturated 0.1 M KOH solution. The results indicated that, among all the as-prepared samples, FeFe 2 O 4 -0.50 was mainly composed of uniformly dispersed spherical nanoparticles of 20-30nm and behaved the best ORR catalytic performance. Its half-wave potential and limiting diffusion current density was 0.61 V and À 1.85 mA cm À 2 @0.4 V vs. RHE), respectively, higher about 20 mV and 1.29 mA cm À 2 than that of FeFe 2 O 4 (0.59 V and À 0.56 mA cm À 2 @0.4 V vs. RHE). In addition, FeFe 2 O 4 -0.50 also showed stronger stability as well as methanol/CO tolerance than that of commercial 20 % Pt/C. It was the evenly dispersed FeFe 2 O 4 nanoscale and FeÀ O bond in FeFe 2 O 4 -0.50 that contributed its excellent electrochemical performance and tolerance for CO and methanol. The asprepare FeFe 2 O 4 -0.50 might be a potential alternative catalyst for ORR in fuel cell.

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Correction: Nanocrystalline Fe–Fe₂O₃ particle-deposited N-doped graphene as an activity-modulated Pt-free electrocatalyst for oxygen reduction reaction

Cited by 5 publications

References 0 publications

Toward Pt-Free Anion-Exchange Membrane Fuel Cells: Fe–Sn Carbon Nitride–Graphene Core–Shell Electrocatalysts for the Oxygen Reduction Reaction

Toward Pt-Free Anion-Exchange Membrane Fuel Cells: Fe–Sn Carbon Nitride–Graphene Core–Shell Electrocatalysts for the Oxygen Reduction Reaction

Rivet Graphene

High Dispersion FeFe₂O₄ nanoparticles synthesis and its Oxygen Reduction Reaction catalytic performance

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Correction: Nanocrystalline Fe–Fe2O3 particle-deposited N-doped graphene as an activity-modulated Pt-free electrocatalyst for oxygen reduction reaction

Cited by 5 publications

References 0 publications

Toward Pt-Free Anion-Exchange Membrane Fuel Cells: Fe–Sn Carbon Nitride–Graphene Core–Shell Electrocatalysts for the Oxygen Reduction Reaction

Toward Pt-Free Anion-Exchange Membrane Fuel Cells: Fe–Sn Carbon Nitride–Graphene Core–Shell Electrocatalysts for the Oxygen Reduction Reaction

Rivet Graphene

High Dispersion FeFe2O4 nanoparticles synthesis and its Oxygen Reduction Reaction catalytic performance

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Product

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Correction: Nanocrystalline Fe–Fe₂O₃ particle-deposited N-doped graphene as an activity-modulated Pt-free electrocatalyst for oxygen reduction reaction

High Dispersion FeFe₂O₄ nanoparticles synthesis and its Oxygen Reduction Reaction catalytic performance