Methanol electrooxidation at mesoporous Pt and Pt–Ru electrodes: A comparative study with carbon supported materials

Garcı́a, Gonzalo; Flórez-Montaño, Jonathan; Creus, Alberto Hernández; Pastor, E.; Planes, Gabriel A.

doi:10.1016/j.jpowsour.2010.11.085

Cited by 39 publications

(28 citation statements)

References 30 publications

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“…The amount of Pt used could also be decreased in this form, because it is expensive and has a limited abundance in the Earth [3,7,8,11,[16][17][18]. In this way, Pt-Ru and Pt alloy nanoparticles containing Au, Ni, Cu, Co, Pd, and/or other transition metals have been tested on different carbon substrates as anodic catalysts [1,2,6,[9][10][11]13,16,17,[19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidation of the Carbon Support to Synthesize Pt(Cu) and Pt-Ru(Cu) Core-Shell Electrocatalysts for Low-Temperature Fuel Cells

Caballero-Manrique¹,

Brillas²,

Centellas³

et al. 2015

Catalysts

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Abstract:The synthesis of core-shell Pt(Cu) and Pt-Ru(Cu) electrocatalysts allows for a reduction in the amount of precious metal and, as was previously shown, a better CO oxidation performance can be achieved when compared to the nanoparticulated Pt and Pt-Ru ones. In this paper, the carbon black used as the support was previously submitted to electrochemical oxidation and characterized by XPS. The new catalysts thus prepared were characterized by HRTEM, FFT, EDX, and electrochemical techniques. Cu nanoparticles were generated by electrodeposition and were further transformed into Pt(Cu) and Pt-Ru(Cu) core-shell nanoparticles by successive galvanic exchange with Pt and spontaneous deposition of Ru species, the smallest ones being 3.3 nm in mean size. The onset potential for CO oxidation was as good as that obtained for the untreated carbon, with CO stripping peak potentials about 0.1 and 0.2 V more negative than those corresponding to Pt/C and Ru-decorated Pt/C, respectively. Carbon oxidation yielded an additional improvement in the catalyst performance, because the ECSA values for hydrogen adsorption/desorption were much higher than those obtained for the non-oxidized carbon. This suggested a higher accessibility of the Pt sites in spite of having the same nanoparticle structure and mean size. OPEN ACCESSCatalysts 2015, 5 816

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Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidation of the Carbon Support to Synthesize Pt(Cu) and Pt-Ru(Cu) Core-Shell Electrocatalysts for Low-Temperature Fuel Cells

Caballero-Manrique¹,

Brillas²,

Centellas³

et al. 2015

Catalysts

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“…In previous papers [8,9], we had studied methanol electrooxidation on mesoporous (MP) Pt and PteRu electrodes. Our earlier results suggest that this all-metal mesoporous catalysts are more efficiency than carbon supported PtRu thanks to the improved surface activity, which reach values as high as 0.82 A cm À2 for MPPt modified by adsorbed Ru (MPPt/Ru).…”

Section: Introductionmentioning

confidence: 99%

A novel method to produce a hierarchical porous carbon as a conductive support of PtRu particles. Effect on CO and methanol electrooxidation

Baena-Moncada

Planes

Moreno

et al. 2013

Journal of Power Sources

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“…In order to minimize the poisoning effects and to increase the electrocatalytic activity, two or three metals have been added on the surface. Concerning the methanol oxidation, PtRu nanoparticles have shown the best performance among the binary catalysts examined [5][6][7][8][9][10]. On the other hand, although the full oxidation of ethanol to carbon dioxide has a favorable thermodynamic potential of 0.08 V (vs. RHE), the efficiency of direct ethanol fuel cells is already severally limited by the formation of partial oxidation products (containing an intact carbon-carbon bond) and strongly adsorbed intermediates.…”

Section: Introductionmentioning

confidence: 99%

Carbon-Supported PtRuMo Electrocatalysts for Direct Alcohol Fuel Cells

et al. 2013

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Abstract:The review article discusses the current status and recent findings of our investigations on the synthesis and characterization of carbon-supported PtRuMo electrocatalysts for direct alcohol fuel cells. In particular, the effect of the carbon support and the composition on the structure, stability and the activity of the PtRuMo nanoparticles for the electrooxidation of CO, methanol and ethanol have been studied. Different physicochemical techniques have been employed for the analysis of the catalysts structures: X-ray analytical methods (XRD, XPS, TXRF), thermogravimetry (TGA) and transmission electron microscopy (TEM), as well as a number of electrochemical techniques like CO adsorption studies, current-time curves and cyclic voltammetry measurements. Furthermore, spectroscopic methods adapted to the electrochemical systems for in situ studies, such as Fourier transform infrared spectroscopy (FTIRS) and differential electrochemical mass spectrometry (DEMS), have been used to evaluate the oxidation process of CO, methanol and ethanol over the carbon-supported PtRuMo electrocatalysts.

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Methanol electrooxidation at mesoporous Pt and Pt–Ru electrodes: A comparative study with carbon supported materials

Cited by 39 publications

References 30 publications

Electrochemical Oxidation of the Carbon Support to Synthesize Pt(Cu) and Pt-Ru(Cu) Core-Shell Electrocatalysts for Low-Temperature Fuel Cells

Electrochemical Oxidation of the Carbon Support to Synthesize Pt(Cu) and Pt-Ru(Cu) Core-Shell Electrocatalysts for Low-Temperature Fuel Cells

A novel method to produce a hierarchical porous carbon as a conductive support of PtRu particles. Effect on CO and methanol electrooxidation

Carbon-Supported PtRuMo Electrocatalysts for Direct Alcohol Fuel Cells

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