2015
DOI: 10.1016/j.electacta.2015.02.203
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Enhanced Methanol Tolerance of Highly Pd rich Pd-Pt Cathode Electrocatalysts in Direct Methanol Fuel Cells

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Cited by 49 publications
(20 citation statements)
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“…Our current results are comparable to what has been reported by Choi et al, where a palladium-rich catalyst (Pd 19 Pt 1 /C, 2.8 nm from XRD) shows relatively larger methanol tolerance compared to Pt/C at 70 °C and 6 M methanol concentration. However, the OCP values reported are lower than those achieved in this study [ 34 ]. The same applies to Pd 3 Pt/C (5 nm) catalysts described by Li et al [ 36 ], which were synthesized through a modified polyol method, where OCP values at 1 M methanol concentration and 75 °C are lower compared to those presented here for Pd-based catalysts at the same methanol concentration and 90 °C.…”
Section: Resultscontrasting
confidence: 88%
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“…Our current results are comparable to what has been reported by Choi et al, where a palladium-rich catalyst (Pd 19 Pt 1 /C, 2.8 nm from XRD) shows relatively larger methanol tolerance compared to Pt/C at 70 °C and 6 M methanol concentration. However, the OCP values reported are lower than those achieved in this study [ 34 ]. The same applies to Pd 3 Pt/C (5 nm) catalysts described by Li et al [ 36 ], which were synthesized through a modified polyol method, where OCP values at 1 M methanol concentration and 75 °C are lower compared to those presented here for Pd-based catalysts at the same methanol concentration and 90 °C.…”
Section: Resultscontrasting
confidence: 88%
“…At a low methanol concentration (1 M) and 60 °C, the open circuit potential (OCP) values follow this order: PtC/-AlfaAesar > Pd/C-ETEK > PdFe/C > Pd/C. Under these working conditions, the crossover effects are not so detrimental [ 7 , 9 ]; thus, OCP usually increases when the temperature rises for low methanol concentrations (i.e., 1 M) [ 9 , 33 , 34 ]. However, the methanol permeation rate increases with temperature [ 35 ].…”
Section: Resultsmentioning
confidence: 99%
“…Accordingly, the cathode is less polarized in the presence of lower methanol permeation. This corresponds to lower overpotentials for the oxygen reduction reaction [ 18 , 19 ]. This strategy is further assisted by using methanol-tolerant cathode electro-catalysts with high activity for oxygen reduction [ 18 , 19 ].…”
Section: Introductionmentioning
confidence: 99%
“…The other intriguing properties identified for using Pd as an alloying element in Pd−Pt catalysts are same crystal structure (FCC) and similar lattice constants (0.77 % mismatch) of Pd and Pt ,. Carbon supported Pd−Co@Pd−Pt catalyst, Pt decorated Pd−Co@Pd core shell structures, Pd−Fe@Pt core shell ORR catalyst with Pd−Fe surface and Pd−Pt core, Pd rich Pd−Pt core shell structures and Pt−Pd/CNT catalyst were projected as methanol tolerant ORR catalysts by various research groups. However, in the presence of methanol, these catalysts display a lower E 1/2 and mass activity values for ORR and methanol oxidation behaviour under RDE experiments.…”
Section: Introductionmentioning
confidence: 99%