The effect of cerium oxide nanoparticles on a Pt/C electrocatalyst synthesized by a continuous two-step process for low-temperature fuel cell

Lim, Do Young; Lee, Weon-Doo; Choi, Do Lim; Kwon, Heock-Hoi; Lee, Ho‐In

doi:10.1016/j.elecom.2008.02.001

Cited by 62 publications

(28 citation statements)

References 13 publications

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“…Furthermore, the above metal oxides are unstable and could not perform in acidic media. Consequently, metal oxides that are stable in acidic media were found out, such as TiO 2 [28,29], W 18 O 49 [30], SnO 2 [31,32], CeO 2 [33], MoO x [34,35] and etc, which had been studied in catalyzing ORR and alcohol oxidation reaction (AOR) as well. As for molybdenum oxides, various compounds with different molybdenum and oxygen atom ratios have been studied in ORR and AOR [34e36], gas sensor [37], heptane isomerization [38] and so on.…”

Section: Introductionmentioning

confidence: 99%

MoO2 nanocrystals down to 5 nm as Pt electrocatalyst promoter for stable oxygen reduction reaction

Yan

Xie

Jing

et al. 2012

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 99%

MoO2 nanocrystals down to 5 nm as Pt electrocatalyst promoter for stable oxygen reduction reaction

Yan

Xie

Jing

et al. 2012

International Journal of Hydrogen Energy

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“…The diffraction peaks of Pt (111) (200), (220) and (311) diffraction planes, respectively [44].These are typical of single-phase oxides with fluorite structures. so, both Pt and CeO 2 phases exist simultaneously in Pt-CeO 2 /C electrocatalyst, it was also noticed that; after introducing CeO 2 to Pt/C in Pt-CeO 2 /C electrocatalyst, 2θ values are shifted in the positive direction when compared to those of Pt in Pt/C as shown in Table 1 Pt(111) and Pt(220) planes are shifted to higher 2θ values when compared to those of Pt/C as shown in Table 1.…”

Section: Resultsmentioning

confidence: 98%

Preparation and Characterization of Nano Structured Pt−MOx/C for Oxygen Reduction Reaction in Acidic Medium

El–Khatib¹,

Fetohi

Amin

et al. 2017

Egypt. J. Chem.

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Pt-MOx/C (M = Ti, Ce or Zr) electrocatalysts was prepared for the purpose of developing a cheap and efficient electrocatalysts for oxygen reduction reaction (ORR) using a mixture of ethylene glycol and sodium borohydride (EG + NaBH 4 ) as areducing agent. Pt/C was studied for estimation of metal oxides effect.Pt-CeO 2 /C-1 was prepared through single reducing agent ethylene glycol for studying the effect of changing the reducing agent on the activity of electrocatalysts toward ORR and for studying ORR kinetics. The electrocatalytic activity of the prepared electrocatalysts towards (ORR) was evaluated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV) on a rotating disc electrode (RDE). Pt-ZrO 2 /C shows the best activity towards ORR among the studied electrocatalysts; the oxygen reduction current density for it is about 5 times; (5.84 mAcm -2 ) as that of Pt/C (1.26 mAcm -2 ). Pt-CeO 2 /C showed better ORR activity (2.24 mAcm -2 ) than Pt-CeO 2 /C-1(1.58 mAcm -2 ) indicating the great effect of changing the reducing agent not only on the electrocatalyst behavior towards ORR but also its particle size and the metal content of the resultant electrocatalysts. Oxygen reduction mechanism for Pt-CeO 2 /C and Pt-CeO 2 /C-1 was evaluated using through KouteckyLevich, they showed first-order kinetics with ORR not controlled solely by diffusion. XRD, EDX and TEM analyses were used to characterize the prepared electrocatalyst.

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“…Figure 3 presents the mass current densities of the ORR in the mixed diffusion-kinetic controlled region for each electrocatalyst analyzed in the form of Koutecky-Levich (K-L) plots for different electrode rotation rates. The slope of the K-L plots is directly related to the number of electrons involved in the reaction, where a higher slope correlates to a lower number of electrons (Calegaro, Lima et al, 2006;Lim, Lee et al, 2008). For Pt 3 Sn/C PPM, the slope was close to the Pt/C ETEK electrode, a reference catalyst for the ORR, where the reaction proceeds through the transfer of 4 electrons.…”

Section: Electrochemical Experimentsmentioning

confidence: 95%

A Pt3Sn/C Electrocatalyst Used as the Cathode and Anode in a Single Direct Ethanol Fuel Cell

Parreira¹,

Rascio²,

Silva³

et al. 2012

IJC

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This paper presents a study involving the use of Pt 3 Sn/C electrocatalysts as cathodes and anodes in a single direct ethanol fuel cell. First, we studied the oxygen reduction reaction (ORR) using commercial Pt/C from ETEK and Pt 3 Sn/C as electrocatalysts with an alloy degree of 92 %. The electrocatalytic activity of the material for oxygen reduction was assessed using the rotating disk electrode technique (RDE). When Pt 3 Sn was tested for ORR in the presence of ethanol, the results showed greater tolerance to the cross-over effect than Pt/C in the electrochemical cell. The experiments in a single direct ethanol fuel cell showed that without oxygen pressurization of the cell, the maximum power density is higher using Pt 3 Sn/C as both cathode and anode than using Pt 3 Sn as an anode and Pt/C as a cathode. When using Pt 3 Sn/C as both the cathode and anode in a direct ethanol fuel cell, cell performance enhances.

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The effect of cerium oxide nanoparticles on a Pt/C electrocatalyst synthesized by a continuous two-step process for low-temperature fuel cell

Cited by 62 publications

References 13 publications

MoO2 nanocrystals down to 5 nm as Pt electrocatalyst promoter for stable oxygen reduction reaction

MoO2 nanocrystals down to 5 nm as Pt electrocatalyst promoter for stable oxygen reduction reaction

Preparation and Characterization of Nano Structured Pt−MOx/C for Oxygen Reduction Reaction in Acidic Medium

A Pt3Sn/C Electrocatalyst Used as the Cathode and Anode in a Single Direct Ethanol Fuel Cell

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