The effect of mixed conductivity on the cathodic overpotential of LaGaO3-based fuel cell

Yi, Jae Yeon; Choi, Gyeong Man

doi:10.1016/j.ssi.2004.09.031

Cited by 12 publications

(4 citation statements)

References 13 publications

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“…65,[68][69][70] For example, for the Au 0.5 /RGO/Au 0.5 / RGO/CF electrode (Fig. 62,65 In the potential range 1.3-1.55 V (Fig. 8A decreased with increasing applied potential from 0.75 to 1.1 V. This suggests that the oxidation rate on the electrodes was accelerated as a result of the removal by oxidation of intermediates (e.g.…”

Section: Electrochemical Impedance Spectrometrymentioning

confidence: 94%

“…At a potential of 1.2 V, the arc begins to reverse to the second quadrant at 1.25 V. This is mainly a result of the recovery of the catalytic active sites because of the removal by oxidation of the reaction intermediates by OH ads adsorbed on the Au nanoparticles. 62,65 In the potential range 1.3-1.55 V (Fig. 8C), the arc ips back to the rst quadrant with a large DIA.…”

Section: Electrochemical Impedance Spectrometrymentioning

confidence: 96%

“…The relatively negative oxidation peak potential on the Au 0.5 /RGO/Au 0.5 /RGO/CF electrode suggests that it has a low overpotential as a result of its low mass transfer resistance. 62,63 The onset oxidation potential (E onset ) on the Au 0.5 /RGO/Au 0.5 /RGO/CF electrode is 0.75 V, which is lower than that on the Au 0.75 /RGO/Au 0.25 /RGO/CF (0.84 V) and Au 0.25 /RGO/Au 0.75 /RGO/CF (0.89 V) electrodes. The lower value of E onset indicates that the Au 0.5 /RGO/Au 0.5 /RGO/CF electrode has better catalytic activity toward ethanol electrooxidation than the Au 0.75 /RGO/Au 0.25 /RGO/CF and Au 0.25 /RGO/ Au 0.75 /RGO/CF electrodes.…”

Section: Effects Of the Distribution Of Au Nanoparticles And Rgo Shee...mentioning

confidence: 99%

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Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Wang,

Zhai

et al. 2015

J. Mater. Chem. A

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A three-dimensional Au nanoparticle/reduced graphene oxide (RGO)/carbon fiber (CF) hybrid electrode (denoted as Au 0.5 /RGO/Au 0.5 /RGO/CF) was fabricated via a layer-by-layer method. The as-formed composite was characterized by Raman spectrometry, X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectrometry. Two RGO sheets and two Au nanoparticle sheets were assembled in alternate layers on the CFs. The catalytic performance of the as-prepared electrode was evaluated via cyclic voltammetry and chronopotentiometry. The as-synthesized three-dimensional Au 0.5 / RGO/Au 0.5 /RGO/CF electrode showed highly efficient electrocatalytic activity toward ethanol oxidation in alkaline medium and the Au nanoparticles were not affected by the graphene layers. The synergistic interaction between the RGO sheets and Au nanoparticles enhanced the catalytic activity of the electrode. The excellent electronic conductivity of the RGO sheets benefited electron transfer and the removal of the intermediate species by oxidation during the ethanol electrooxidation reaction, which improved the catalytic activity. As a result of the effects of these multiple factors, the Au 0.5 /RGO/Au 0.5 / RGO/CF electrode displayed a good catalytic performance. Fig. 5 (A) Cyclic voltammograms and (B) chronoamperograms of the Au 0.25 /RGO/Au 0.75 /RGO/CF, Au 0.5 /RGO/Au 0.5 /RGO/CF and Au 0.75 / RGO/Au 0.25 /RGO/CF electrodes in 1.0 M C 2 H 5 OH/1.0 M KOH solution. J. Mater. Chem. A This journal is

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Section: Electrochemical Impedance Spectrometrymentioning

confidence: 94%

Section: Electrochemical Impedance Spectrometrymentioning

confidence: 96%

Section: Effects Of the Distribution Of Au Nanoparticles And Rgo Shee...mentioning

confidence: 99%

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Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Wang,

Zhai

et al. 2015

J. Mater. Chem. A

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“…Electrochemical and mechanical properties of these materials under different operational conditions have been extensively studied (4,5) and optimized by changing the cermet structure and particle size distribution (6)(7)(8). To reduce the operating temperature and increase the performance, alternative materials for the cell components have been developed (9,10). Among them gadolinia doped ceria (GDC) possesses higher ionic conductivity than YSZ (11,12) and a lower thermal expansion coefficient in comparison to perovskite materials (13).…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Anode-Supported Micro-Tubular Solid Oxide Fuel Cells

Mohammadi¹,

Pusz

Smirnova³

et al. 2007

ECS Trans.

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Mechanical properties of the pellets imitating an anode- supported micro-tubular Solid Oxide Fuel Cell (SOFC) using a Nickel Oxide-Gadolinia Doped Ceria (NiO-GDC) anode, GDC electrolyte and (La,Sr)(Co,Fe)O3-based cathode have been tested. Two GDC powders from different manufacturers, Anan Kasei and DKKK, were selected for investigation and compared to traditional Yttria Stabilized Zirconia (YSZ) electrolyte. The mechanical properties, such as Young's modulus, hardness, and biaxial flexure strength of the electrolyte layer and NiO- GDC anode were evaluated and correlated with the SEM morphological characterization.

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Anode Supported LSCM-LSGM-LSM Solid Oxide Fuel Cell

Mohammadi

Sammes

Pusz

et al. 2008

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

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The effect of mixed conductivity on the cathodic overpotential of LaGaO3-based fuel cell

Cited by 12 publications

References 13 publications

Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Mechanical Properties of Anode-Supported Micro-Tubular Solid Oxide Fuel Cells

Anode Supported LSCM-LSGM-LSM Solid Oxide Fuel Cell

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The effect of mixed conductivity on the cathodic overpotential of LaGaO3-based fuel cell

Cited by 12 publications

References 13 publications

Three-dimensional Au0.5/reduced graphene oxide/Au0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Three-dimensional Au0.5/reduced graphene oxide/Au0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Mechanical Properties of Anode-Supported Micro-Tubular Solid Oxide Fuel Cells

Anode Supported LSCM-LSGM-LSM Solid Oxide Fuel Cell

Contact Info

Product

Resources

About

Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media

Three-dimensional Au_0.5/reduced graphene oxide/Au_0.5/reduced graphene oxide/carbon fiber electrode and its high catalytic performance toward ethanol electrooxidation in alkaline media