Synthesis and characterization of nanostructured PtCo-CeOx/C for oxygen reduction reaction

Lee, Kang Hee; Kwon, Kyungjung; Roev, Victor; Yoo, Duck Young; Chang, Hyuk; Seung, Doyoung

doi:10.1016/j.jpowsour.2008.09.029

Cited by 54 publications

(32 citation statements)

References 25 publications

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“…The effective dimension of electrode in MEA is 2.8 cm × 2.8 cm. The details on the preparation and the operation of MEA are available elsewhere [8,12,14].…”

Section: Methodsmentioning

confidence: 99%

“…For the membrane side, PA is doped in various kinds of polymer membrane that can endure high operating temperatures [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Polybenzimidazole (PBI) is the most widely studied membrane for the high temperature PEMFC and its high proton conductivity is due to a high PA doping capability [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Poly(2,5-benzimidazole) (ABPBI) as an alternative to PBI with less doped PA than PBI is known to have a comparable proton conductivity to PBI [11,12]. PA-doped polybenzoxazine (PBOA)-based membrane is also used for high temperature PEMFC with unhumidified reactant gases [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells

Kwon

Park

Yoo

et al. 2009

Electrochimica Acta

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“…The effective dimension of electrode in MEA is 2.8 cm × 2.8 cm. The details on the preparation and the operation of MEA are available elsewhere [8,12,14].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells

Kwon

Park

Yoo

et al. 2009

Electrochimica Acta

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“…7c, d). The spectra of Pd-CeO 2 obtained at 300 and 600°C is not the expected XPS response of Ce [25,33,36,37]. It can be observed that the doublet corresponding to Ce 4?…”

Section: Catalytic Activity Of Pd-ceo 2 Catalysts For the Faormentioning

confidence: 88%

Evaluation of supported and unsupported Pd–CeO2 nanostructured anode electrocatalysts for the formic acid and the glycerol oxidation reactions in acid media

et al. 2015

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The catalytic activity of Pd-CeO 2 /C and nonsupported Pd-CeO 2 electrocatalysts for the formic acid (FAOR) and glycerol oxidation reaction (GOR) is evaluated in this work. The materials have been synthesized by pyrolysis in H 2 atmosphere at 300 and 600°C, with a nominal Pd:CeO 2 ratio of 1:1. X-ray diffraction analysis demonstrates polycrystalline materials with particles sizes ranging from 11 to 14 nm (Pd) and 26 to 48 nm (CeO 2 ). Electrocatalytic measurements show a positive effect of dispersing the catalysts on Vulcan in the case of the FAOR, in terms of potential-current density profile and onset potential. While unsupported Pd-CeO 2 nanoparticles behave poorly, the Pd-CeO 2 /C anodes show a very high performance towards the FAOR. Particularly, Pd-CeO 2 /C obtained at 600°C shows a significantly high catalytic activity, with a higher mass current density than a comparable Pd/C electrocatalyst. X-ray photoelectron spectroscopy analysis undoubtedly demonstrates that the carbon support has an important effect on the oxidation states of Pd and CeO 2 , which in turns influences positively the catalytic behavior of Pd-CeO 2 /C catalysts. Furthermore, both supported and unsupported Pt-CeO 2 materials have shown no catalytic activity for the GOR. The results indicate that Pd-CeO 2 /C electrocatalysts can be considered as excellent candidate anodes for direct formic acid fuel cells.

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“…To the best the authors knowledge, only one study has been reported, namely the CeO x -PtCo/C system, which exhibited enhanced activity. 43 The durability of this catalyst was unfortunately not described. In this study, emphasis is placed on increasing the durability of Pt 3 Co/C at high temperature and high potential conditions.…”

mentioning

confidence: 99%

RuO₂Nanosheet Modified Pt₃Co/C Cathode: Mitigating Activity Loss at High Temperature and High Potential Conditions

Takimoto

Chauvin

Sugimoto

2015

J. Electrochem. Soc.

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Pt3Co/C is known as an active catalyst for the oxygen reduction reaction (ORR). The stability of this catalyst under high temperature and potential conditions is a concern for practical application in fuel cell systems. In this study, we have pursued the possibility of improving the performance of Pt3Co/C under such severe conditions by the addition of ruthenium oxide nanosheets. The initial mass activity of RuO2 nanosheets modified Pt3Co/C was higher compared to that of pristine Pt3Co/C. The improved mass activity is attributed to the increase in accessible active sites for ORR for the composite catalyst. The mass activity after accelerated durability test by potential step cycling between 0.6 and 1.2 V vs. RHE at 60°C for RuO2ns-Pt3Co/C was 243 A (g-Pt)−1, which is 1.9 times higher than non-modified Pt3Co/C (127 A (g-Pt)−1). Transmission electron microscopy analysis and energy dispersive X-ray spectroscopy of the catalyst after durability test showed that the particle growth and dissolution of cobalt was inhibited by the addition of RuO2 nanosheets.

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Synthesis and characterization of nanostructured PtCo-CeOx/C for oxygen reduction reaction

Cited by 54 publications

References 25 publications

Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells

Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells

Evaluation of supported and unsupported Pd–CeO2 nanostructured anode electrocatalysts for the formic acid and the glycerol oxidation reactions in acid media

RuO₂Nanosheet Modified Pt₃Co/C Cathode: Mitigating Activity Loss at High Temperature and High Potential Conditions

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Synthesis and characterization of nanostructured PtCo-CeOx/C for oxygen reduction reaction

Cited by 54 publications

References 25 publications

Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells

Phosphoric acid distribution in the membrane electrode assembly of high temperature proton exchange membrane fuel cells

Evaluation of supported and unsupported Pd–CeO2 nanostructured anode electrocatalysts for the formic acid and the glycerol oxidation reactions in acid media

RuO2Nanosheet Modified Pt3Co/C Cathode: Mitigating Activity Loss at High Temperature and High Potential Conditions

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RuO₂Nanosheet Modified Pt₃Co/C Cathode: Mitigating Activity Loss at High Temperature and High Potential Conditions