The use of different types of reduced graphene oxide in the preparation of Fe-N-C electrocatalysts: capacitive behavior and oxygen reduction reaction activity in alkaline medium

Osmieri, Luigi; Monteverde, Alessandro; Specchia, Vito

doi:10.1007/s10008-016-3332-2

Cited by 35 publications

(20 citation statements)

References 91 publications

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“…In fact, even at high over-potentials the current is still in a mixed kinetic and mass-transport limited zone [85]. The obtained results confirm that the produced CNT has ORR activity in alkaline conditions, as typically observed for carbon-based materials [86]. However, for carbon-based materials, this faradaic reduction current is mostly caused by partial electroreduction of O 2 to H 2 O 2 [87].…”

Section: Bio-char Upgrading To Cntsupporting

confidence: 78%

H 2 -rich syngas production through mixed residual biomass and HDPE waste via integrated catalytic gasification and tar cracking plus bio-char upgrading

Esfahani

Osmieri

Specchia

et al. 2017

Chemical Engineering Journal

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Section: Bio-char Upgrading To Cntsupporting

confidence: 78%

H 2 -rich syngas production through mixed residual biomass and HDPE waste via integrated catalytic gasification and tar cracking plus bio-char upgrading

Esfahani

Osmieri

Specchia

et al. 2017

Chemical Engineering Journal

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“…This result could be due to a different interaction between the species contained in the electrolyte solution and the carbon surface in the two different media, giving rise to a different pseudo‐capacitive behavior at different pH values. The pseudo‐capacitance phenomena are due to chemisorption phenomena with partial charge transfer at the surface, or redox processes involving surface functional groups,, and have to be distinguished from the double layer capacitance effect, which is related to the surface area exposed to the electrolyte ,…”

Section: Resultsmentioning

confidence: 99%

Polypyrrole‐Derived Fe−Co−N−C Catalyst for the Oxygen Reduction Reaction: Performance in Alkaline Hydrogen and Ethanol Fuel Cells

et al. 2018

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Alkaline membrane fuel cells (AMFCs) have started to become more attractive in recent years due to the development of polymeric membranes with good anionic conductivity and durability. However, few studies investigating the performance of H 2 /O 2 fueled AMFCs and alkaline direct ethanol fuel cells (DEFCs) with membrane electrode assemblies (MEAs) fabricated with Pt-group metal (PGM)-free catalysts are available in the literature. In this paper, we synthesized and fully characterized a FeÀCoÀNÀC electrocatalyst for the oxygen reduction reaction (ORR) by a sacrificial method, using pyrrole as a unique and inexpensive precursor for N-doped carbonaceous materials. Very good ORR activity and stability were obtained in alkaline conditions, most likely due to the presence of CoÀFe@C nanoparticles. We achieved a very high performance in an AMFC, 420 mW cm À2 at 60 8C, among the highest in the literature for PGM-free catalysts, and a good performance in a passive DEFC, 28 mW cm À2 at room temperature.[a] Dr.

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“…Also, in many works, the RDE experiments are not conducted in "static" conditions (i.e., using the staircase voltammetry technique), but rather by using a linear sweep voltammetry. This makes the E on extraction even more arbitrary and uncertain, due to the relevant contribution of the capacitive currents at low ORR overpotentials, especially if the ORR polarization curve has not been corrected for the background current measured in the electrolyte saturated with inert gas [169][170][171].…”

Section: Rde Performancementioning

confidence: 99%

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Osmieri

2019

ChemEngineering

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Platinum group metal (PGM)-free catalysts for oxygen reduction reaction (ORR) have attracted increasing interest as potential candidates to replace Pt, in the view of a future widespread commercialization of polymer electrolyte fuel cell (PEFC) devices, especially for automotive applications. Among different types of PGM-free catalysts, M–N–C materials appear to be the most promising ones in terms of activity. These catalysts can be produced using a wide variety of precursors containing C, N, and one (or more) active transition metal (mostly Fe or Co). The catalysts synthesis methods can be very different, even though they usually involve at least one pyrolysis step. In this review, five different synthesis methods are proposed, and described in detail. Several catalysts, produced approximately in the last decade, were analyzed in terms of performance in rotating disc electrode (RDE), and in H2/O2 or H2/air PEFC. The catalysts are subdivided in five different categories corresponding to the five synthesis methods described, and the RDE and PEFC performance is put in relation with the synthesis method.

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The use of different types of reduced graphene oxide in the preparation of Fe-N-C electrocatalysts: capacitive behavior and oxygen reduction reaction activity in alkaline medium

Cited by 35 publications

References 91 publications

H 2 -rich syngas production through mixed residual biomass and HDPE waste via integrated catalytic gasification and tar cracking plus bio-char upgrading

H 2 -rich syngas production through mixed residual biomass and HDPE waste via integrated catalytic gasification and tar cracking plus bio-char upgrading

Polypyrrole‐Derived Fe−Co−N−C Catalyst for the Oxygen Reduction Reaction: Performance in Alkaline Hydrogen and Ethanol Fuel Cells

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

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