Influence of the preparation method on Pt3Cu/C electrocatalysts for the oxygen reduction reaction

Monteverde, Alessandro; Esfahani, Reza Alipour Moghadam; Peter, Ildiko; Specchia, Vito

doi:10.1016/j.electacta.2015.02.040

Cited by 15 publications

(7 citation statements)

References 40 publications

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“…For a 4e ORR, I lim should be a fixed value in a particular concentration solution at 1600 rpm on a 5 mm working electrode, such as 5.277 mA cm −2 for 0.5 M H 2 SO 4 , 6.332 mA cm −2 for 0.1 M HClO 4 , and 5.968 mA cm −2 for 0.1 M KOH (The parameters were listed in support information). However, the experimentally measured I lim for 4e ORR are quite different among various literatures under the same experimental conditions, no matter on Pt/C catalysts or non‐noble metal catalysts, as shown in Figure . It is noteworthy that most measured I lim are lower than the theoretical value, and some are even only half of the theoretical value.…”

Section: Introductionmentioning

confidence: 68%

Effect of Experimental Operations on the Limiting Current Density of Oxygen Reduction Reaction Evaluated by Rotating‐Disk Electrode

Zhong

Liu

et al. 2020

ChemElectroChem

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The universal linear scan voltammogram measurement on the rotating disk electrode (RDE) has been identified as a simple method to investigate the oxygen reduction activity of electrocatalysts. The steady‐state limiting current density Ilim indicates the maximum diffusion current density in the oxygen reduction reaction (ORR) during RDE measurement, which should be a fixed value in theory for a 4e ORR in a particular concentration solution and at a certain rotate speed. However, in experiments, Ilim is always variable and smaller than theoretical value even though with the same the catalyst, electrode, and rotator. So the impact of various experimental operating parameters on Ilim is highly necessary to be investigated. In this paper, factors, such as catalyst loading, O2 inlet condition, O2 flow rate, gas tightness, solution concentration, and purity, have been investigated for their effects on the Ilim of ORR on three typical catalysts (20 % commercial Pt/C, Iron/Nitrogen/Carbon‐catalyst and N‐doped carbon nanotubes). The results indicate that the catalyst loading and O2 inlet condition are the key factors influencing the Ilim of ORR. While, the O2 flow rate, gas tightness, solution concentration, and purity have little influence on the Ilim of ORR. The correct Ilim could be obtained under the optimized catalyst loading and the O2 inlet with an extended sand core tube.

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Section: Introductionmentioning

confidence: 68%

Effect of Experimental Operations on the Limiting Current Density of Oxygen Reduction Reaction Evaluated by Rotating‐Disk Electrode

Zhong

Liu

et al. 2020

ChemElectroChem

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“…3.33 eV. The most intense doublet at 71.45 (4f7/2) and 74.78 eV (4f5/2) was due to the metallic Pt, corresponding to metallic platinum particles (Pt 0 ) [4,6,10,13,17]. To assess the chemical structure of the Pt/C-MnxO1+x catalyst, an extra sample of MnO2 annealed at 600 °C (same temperature used to anchor Pt nanoparticles on the C-MnO2 support) was examined by μRS.…”

Section: Physical-chemical Characterizationmentioning

confidence: 99%

“…Platinum is the most widely used catalyst for both the anodic methanol oxidation reaction (MOR) and the cathodic oxygen reduction reaction (ORR) [4,5]. Pt is considered the most suitable electro-catalyst for MOR due to its high activity and stability, especially in acidic media [6].…”

Section: Introductionmentioning

confidence: 99%

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

et al. 2015

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Platinum (Pt) nanoparticles are deposited on a hybrid support (C-MnO2) according to a polyol method. The home-made catalyst, resulted as Pt/C-MnxO1+x, is compared with two different commercial platinum based materials (Pt/C and PtRu/C). The synthesized catalyst is characterized by means of FESEM, XRD, ICP-MS, XPS and μRS analyses. MnO2 is synthesized and deposited over a commercial grade of carbon (Vulcan XC72) by facile reduction of potassium permanganate in acidic solution. Pt nanoparticles are synthesized on the hybrid support by a polyol thermal assisted method (microwave irradiation), followed by an annealing at 600 °C. The obtained catalyst displays a support constituted by a mixture of manganese oxides (Mn2O3 and Mn3O4) with a Pt loading of 19 wt. %. The electro-catalytic activity towards MOR is assessed by RDE in acid conditions (0.5 M H2SO4), evaluating the ability to oxidize methanol in 1 M concentration. The synthesized Pt/C-MnxO1+x catalyst shows good activity as well as good stability compared to the commercial Pt/C based catalyst.

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“…Monteverde Videla et al explored the influence of different preparation methods on the catalytic activity of Pt 3 Cu alloy supported on multiwalled carbon nanotubes for ORR. 26 In a separate study, Li et mg Pt−1 ). 27 Despite the noticeable improvement in the electrocatalytic activity of alloy components and carbon analogues, their performance is still below expectation.…”

Section: Introductionmentioning

confidence: 95%

“…These exceptional properties can be attributed to the synergistic effect of the uniformly dispersed bimetallic components over nitrogen-doped carbon. Monteverde Videla et al explored the influence of different preparation methods on the catalytic activity of Pt 3 Cu alloy supported on multiwalled carbon nanotubes for ORR . In a separate study, Li et al investigated the ORR electrocatalytic activity of a trimetallic composite (Pt 23 Cu 51 Ni 26 /C) with enhanced mass activity (0.9 A mg Pt–1 ) .…”

Section: Introductionmentioning

confidence: 99%

Heterostructure NiCo-Alloy Nanosheet Embedded Ceria Nanorods: A Highly Efficient Bifunctional Electrocatalyst toward Oxygen Evolution Reaction and Oxygen Reduction Reaction

Hameed,

Nasim,

Nisar

et al. 2023

Energy Fuels

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The development of low-cost bifunctional electrocatalysts with high efficiency and comparable activity to the benchmark catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is crucial to meet the practical demands of integrated water splitting and regenerative metal−air battery systems. In this study, a heterointerface structure of NiCo-alloy@ CeO 2 has been synthesized via a facile synthetic approach. NiCo-alloy nanosheets are rooted over the surface of the CeO 2 nanorods, triggering an interfacial synergistic effect that significantly improves electrochemical performance. The resultant bifunctional electrocatalyst (NiCo-alloy@ CeO 2 ) demonstrates effective and enduring electrocatalytic ability toward OER and ORR in an alkaline environment. The catalyst exhibits a half-wave potential (E 1/2 ) of 0.81 V RHE and onset potential (E onset ) of 0.89 V RHE for ORR in 0.1 M KOH. An overpotential (η) of 170 mV vs RHE at 20 mA cm −2 has been recorded for OER, which is superior to the ruthenium-based electrocatalysts. The low bifunctionality index (BI) of NiCo-alloy@CeO 2 of ∼0.48 V indicates the ability of the synthesized material to be employed in metal−air batteries. This NiCo-alloy@CeO 2 might be implemented in reliable and sustainable energy devices, paving the way for the design and fabrication of commercialized electrocatalysts, water splitting, and metal−air batteries.

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Influence of the preparation method on Pt3Cu/C electrocatalysts for the oxygen reduction reaction

Cited by 15 publications

References 40 publications

Effect of Experimental Operations on the Limiting Current Density of Oxygen Reduction Reaction Evaluated by Rotating‐Disk Electrode

Effect of Experimental Operations on the Limiting Current Density of Oxygen Reduction Reaction Evaluated by Rotating‐Disk Electrode

The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

Heterostructure NiCo-Alloy Nanosheet Embedded Ceria Nanorods: A Highly Efficient Bifunctional Electrocatalyst toward Oxygen Evolution Reaction and Oxygen Reduction Reaction

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