Catalytic activity vs. size correlation in platinum catalysts of PEM fuel cells prepared on carbon black by different methods

Nores-Pondal, Federico J.; Vilella, Irene María Julieta; Troiani, Horacio Esteban; Granada, M.; Miguel, Sergio R. de; Scelza, Osvaldo A.; Corti, Horacio R.

doi:10.1016/j.ijhydene.2009.07.073

Cited by 98 publications

(51 citation statements)

References 50 publications

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“…These results demonstrate that i P c is one of the most important factors in the control of the mean diameter of nanoparticles and therefore in the ECSA ; it does not depend on the Pt load in the support as claimed in the bibliography (Bergamaski et al, 2006;Geniès et al, 1998;Maillard, 2002;Nores-Pondal et al, 2009;Perez et al, 1998), at least between 10 and 40 % nominal loads. On the other hand, other factors in the control of the mean diameter of nanoparticles exist, such as the influence of PVP in the processes of nucleation and/or growth.…”

Section: Importance Of the Initial Concentration Of The Precursorsupporting

confidence: 73%

Size control of carbon-supported platinum nanoparticles made using polyol method for low temperature fuel cells

Favilla

Acosta

Schvezov

et al. 2013

Chemical Engineering Science

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Size control of carbon-supported platinum nanoparticles made using polyol method for low temperature fuel cells, Chemical Engineering Science, http://dx.doi.org/10.1016/j.ces. 2013.05.067 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe aim of this work is to present the results of the synthesis of Pt nanoparticles using the modified polyol method, using carbon black powder Vulcan XC-72R as a support. Two different techniques were used to synthesize the catalysts: a) fixing the initial concentration of the precursor (2 mM in H 2 PtCl 6 ) while adding the required amount of support to obtain different nominal loads of platinum; b) changing the initial concentration of the precursor to obtain altogether 10 wt.% nominal load of platinum. Catalysts were characterized using X-ray diffraction, transmission electron microscopy and cyclic voltammetry. The particles obtained ranged in sizes between 2.2 and 6.2 nm. These sizes were controlled by the initial concentration of the precursor. It has been found that the concentration of nanoparticles formed during synthesis was the same regardless of a) the initial concentration of the precursor and b) the amount of carbon support. In order to explain experimental results a new and simple statistical and geometrical treatment is used.

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Section: Importance Of the Initial Concentration Of The Precursorsupporting

confidence: 73%

Size control of carbon-supported platinum nanoparticles made using polyol method for low temperature fuel cells

Favilla

Acosta

Schvezov

et al. 2013

Chemical Engineering Science

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“…Figure 2 shows an XRD pattern of Pt/CB powder. The relatively-sharp XRD peaks of Pt with face-centered cubic structure [19] are observed, and the crystallite size (CS) of Pt nanoparticles, which was calculated from the (111) peak by using Scherrer equation, was ca. [20].…”

Section: Measurement Of Co 2 and Co Sensing Properties Of Electrochemmentioning

confidence: 99%

CO and CO2 sensing properties of electrochemical gas sensors using an anion-conducting polymer as an electrolyte

Hyodo

Ishibashi

Matsuo

et al. 2012

Electrochimica Acta

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“…Currently, Pt particles, with 2 to 3 nm in diameter, are loaded on high surface area carbon supports [4,5]. Of the Pt loaded, only the surface atoms interact with the reactants.…”

Section: Introductionmentioning

confidence: 99%

Effect of pretreatment on Pt–Co/C cathode catalysts for the oxygen reduction reaction

Fox

Colón-Mercado

2010

International Journal of Hydrogen Energy

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8035078560Carbon supported Pt and Pt-Co electrocatalysts for the oxygen reduction reaction in low temperature fuel cells were prepared by the reduction of the metal salts with sodium borohydride and sodium formate. The effect of surface treatment with nitric acid on the carbon surface and Co on the surface of carbon prior to the deposition of Pt was studied. The catalysts where Pt was deposited on treated carbon the ORR reaction preceded more through the two electron pathway and favored peroxide production, while the fresh carbon catalysts proceeded more through the four electron pathway to complete the oxygen reduction reaction. NaCOOH reduced Pt/C catalysts showed higher activity that NaBH 4 reduced Pt/C catalysts. It was determined that the Co addition has a higher impact on catalyst activity and active surface area when used with NaBH 4 as reducing agent as compared to NaCOOH.

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Catalytic activity vs. size correlation in platinum catalysts of PEM fuel cells prepared on carbon black by different methods

Cited by 98 publications

References 50 publications

Size control of carbon-supported platinum nanoparticles made using polyol method for low temperature fuel cells

Size control of carbon-supported platinum nanoparticles made using polyol method for low temperature fuel cells

CO and CO2 sensing properties of electrochemical gas sensors using an anion-conducting polymer as an electrolyte

Effect of pretreatment on Pt–Co/C cathode catalysts for the oxygen reduction reaction

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