EDTA-derived Co N C and Fe N C electro-catalysts for the oxygen reduction reaction in acid environment

Vecchio, Carmelo Lo; Aricò, A.S.; Monforte, Giuseppe; Baglio, V.

doi:10.1016/j.renene.2017.12.084

Cited by 38 publications

(33 citation statements)

References 47 publications

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“…Although Pt/C catalysts are widely used as oxygen electrode, there is the need to find new, efficient, stable and less expensive materials to be used as cathodes . Considerable efforts in the last decade were addressed to improve the electrochemical oxygen reduction reaction and to reduce Pt loading, in order to achieve low‐cost targets . An interesting strategy to reduce costs and improve Platinum catalytic activity is to use metal oxide additives, such as SnO 2 , TiO 2 , ZrO 2 , as promoters.…”

Section: Figurementioning

confidence: 99%

“…[5][6][7] Considerable efforts in the last decade were addressed to improve the electrochemical oxygen reduction reaction and to reduce Pt loading, in order to achieve lowcost targets. [8] An interesting strategy to reduce costs and improve Platinum catalytic activity is to use metal oxide additives, such as SnO 2 , [9] TiO 2 , [10] ZrO 2 , [11] as promoters. Some metal oxides have been also proposed as supports with high corrosion resistance properties.…”

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confidence: 99%

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Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO_3−δ Additive

et al. 2019

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Platinum scarcity and its high cost have led to the requirement of alternative materials catalysing the oxygen reduction reaction (ORR), which is the main rate‐determining step occurring in electrochemical devices, including metal‐air batteries and fuel cells. We report a study on a sub‐stoichiometric calcium titanate (CaTiO3−δ, CTO) compound used as promoter for the ORR in order to reduce the Pt loading and improve its electrocatalytic activity. Composite catalysts based on Pt/C with different amounts of CTO were prepared and their activity was investigated by rotating disk electrode (RDE). The obtained results proved a higher catalytic activity for the composite electrode, with respect to pure Pt/C, in terms of electrochemically active surface area, oxygen reduction current density, onset potential and stability.

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Section: Figurementioning

confidence: 99%

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Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO_3−δ Additive

et al. 2019

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“…Other compounds such as ethylenediaminetetraacetic acid (EDTA) or 2,3,5,6-tetrakis(2-pyridyl) pyrazine (TPTZ) were proposed as nitrogen sources [59][60][61]. In some cases [59,61], a high surface area oxidized carbon support was used to increase the electrical conductivity; whereas, in another work [60], different types of novel carbon nano-networks (CNNs) were employed.…”

Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

et al. 2018

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Direct methanol fuel cells (DMFCs) are emerging technologies for the electrochemical conversion of the chemical energy of a fuel (methanol) directly into electrical energy, with a low environmental impact and high efficiency. Yet, before this technology can reach a large-scale diffusion, specific issues must be solved, in particular, the high cost of the cell components. In a direct methanol fuel cell system, high capital costs are mainly derived from the use of noble metal catalysts; therefore, the development of low-cost electro-catalysts, satisfying the target requirements of high performance and durability, represents an important challenge. The research is currently addressed to the development of metal-nitrogen-carbon (M-N-C) materials as cheap and sustainable catalysts for the oxygen reduction reaction (ORR) in an acid environment, for application in polymer electrolyte fuel cells fueled by hydrogen or alcohol. In particular, this mini-review summarizes the recent advancements achieved in DMFCs using M-N-C catalysts. The presented analysis is restricted to M-N-C catalysts mounted at the cathode of a DMFC or investigated in rotating disk electrode (RDE) configuration for the ORR in the presence of methanol in order to study alcohol tolerance. The main synthetic routes and characteristics of the catalysts are also presented.

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“…A new way to produce and store electrical energy is necessary to address future energy demands and reduce polluting emissions . Rechargeable alkaline metal‐air batteries can be considered one of the most promising next energy systems owing to their extremely high energy densities .…”

Section: Introductionmentioning

confidence: 99%

“…A new way to produce and store electrical energy is necessary to address future energy demands and reduce polluting emissions . [1,2] Rechargeable alkaline metal-air batteries can be considered one of the most promising next energy systems owing to their extremely high energy densities. [3][4][5][6][7] These make them particularly interesting for applications in electrical-energy storage systems for coupling intermittent renewable energy sources into smart energy grids.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis of Oxygen on Bifunctional Nickel‐Cobaltite Spinel

et al. 2020

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Transition‐metal‐based materials are among the most active and durable catalysts for the effective electrocatalysis of oxygen‐related reactions. Herein, we present a study on bifunctional catalysts as air electrodes aimed at metal‐air batteries based on nickel and cobalt spinel (NiCo2O4) supported on electrospun carbon nanofibers. The physicochemical features of these transition‐metal‐based catalysts are essential for the understanding of their electrochemical activity. Results show that the major presence of oxidized Ni and Co species (Ni3+ and Co3+) produces higher activity for the oxygen evolution reaction (OER), whereas lower oxidation states of the metals (Ni2+, Co2+, Ni0 and Co0) together with the presence of N‐doped carbon lead to enhanced oxygen reduction reaction (ORR) performance. This study highlights the importance of designing catalysts in terms of crystallographic structure and proper oxidation states of the elements for maximizing their performance.

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EDTA-derived Co N C and Fe N C electro-catalysts for the oxygen reduction reaction in acid environment

Cited by 38 publications

References 47 publications

Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO_3−δ Additive

Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO_3−δ Additive

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

Electrocatalysis of Oxygen on Bifunctional Nickel‐Cobaltite Spinel

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EDTA-derived Co N C and Fe N C electro-catalysts for the oxygen reduction reaction in acid environment

Cited by 38 publications

References 47 publications

Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO3−δ Additive

Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO3−δ Additive

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

Electrocatalysis of Oxygen on Bifunctional Nickel‐Cobaltite Spinel

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Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO_3−δ Additive

Enhancing Oxygen Reduction Reaction Catalytic Activity Using a Sub‐Stoichiometric CaTiO_3−δ Additive