2009
DOI: 10.1021/jp810970d
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A Methanol-Tolerant Carbon-Supported Pt−Au Alloy Cathode Catalyst for Direct Methanol Fuel Cells and Its Evaluation by DFT

Abstract: A Pt-Au alloy catalyst of varying compositions is prepared by codeposition of Pt and Au nanoparticles onto a carbon support to evaluate its electrocatalytic activity toward an oxygen reduction reaction (ORR) with methanol tolerance in direct methanol fuel cells. The optimum atomic weight ratio of Pt to Au in the carbonsupported Pt-Au alloy (Pt-Au/C) as established by cell polarization, linear-sweep voltammetry (LSV), and cyclic voltammetry (CV) studies is determined to be 2:1. A direct methanol fuel cell (DMFC… Show more

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Cited by 140 publications
(134 citation statements)
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“…One contribution of 16 to a Special feature 'High-performance computing in the chemistry and physics of materials '. In experimental studies of bimetallic clusters, Pt-Au is among the most popular systems owing to its promising catalytic capacities (Pearson 1972;Okamoto & Massalski 1985;Mihut et al 2002;Luo et al 2005;Bond et al 2006;Hernández-Fernández et al 2007;Braidy et al 2008;Ferrando et al 2008a;Zhang et al 2008;Abrams et al 2009;Peng & Yang 2009;Selvarani et al 2009;Yancey et al 2010). Bimetallic Pt-Au clusters have a wide range of catalytic applications, including oxygen reduction in fuel cells (Hernández-Fernández et al 2007), methanol and formic acid oxidations (Zhang et al 2008;Peng & Yang 2009) and selective oxidations (Bond et al 2006).…”
Section: Introductionmentioning
confidence: 99%
“…One contribution of 16 to a Special feature 'High-performance computing in the chemistry and physics of materials '. In experimental studies of bimetallic clusters, Pt-Au is among the most popular systems owing to its promising catalytic capacities (Pearson 1972;Okamoto & Massalski 1985;Mihut et al 2002;Luo et al 2005;Bond et al 2006;Hernández-Fernández et al 2007;Braidy et al 2008;Ferrando et al 2008a;Zhang et al 2008;Abrams et al 2009;Peng & Yang 2009;Selvarani et al 2009;Yancey et al 2010). Bimetallic Pt-Au clusters have a wide range of catalytic applications, including oxygen reduction in fuel cells (Hernández-Fernández et al 2007), methanol and formic acid oxidations (Zhang et al 2008;Peng & Yang 2009) and selective oxidations (Bond et al 2006).…”
Section: Introductionmentioning
confidence: 99%
“…To further examine the Pt particle size, distribution and structural morphology, HR-TEM images were taken for various electrocatalysts. The platinum crystallite size is calculated from full-widthat-half-maximum (FWHM) value for the (111) peak using Scherrer equation [46]. The average Pt crystallite sizes in Pt/TNW, Pt/MWCNT and Pt/TWCNTs electrocatalysts are furnished in Table 1S in the Supporting Information.…”
Section: Resultsmentioning
confidence: 99%
“…MEAs were fabricated following a proprietary protocol reported in our previous work [46]. To sum up, a Toray carbon paper (TGP-H-120) of 0.35 mm thickness with 15 wt% Teflonization was used as the backing layer.…”
Section: Fabrication and Evaluation Of Membrane Electrode Assemblies mentioning
confidence: 99%
“…Meanwhile, the excess chargee nhances the activity for charget ransfer of the Pt atom, which resultsi nt he lower binding energy of Pt 4f electrons in Pt-on-Pd/G (Figure 2e). [22] The theoretical work revealed the reasons for the improved electrocatalytic performance of Pt-on-Pd/G:1)the more continuous d-states of the PDOS;a nd 2) the downshift of the d-band center.H owever,t he catalytic performance of Pt-on-Pd/G would be reduced if the amount of Pt wast oo large (Figure 3a), because the oxidation reaction of formic acid would follow the dehydration pathway on Pt, in whicht he formation of CO would reduce the catalyst performance.…”
mentioning
confidence: 99%