2001
DOI: 10.1016/s0022-0728(01)00421-1
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An XPS study on binary and ternary alloys of transition metals with platinized carbon and its bearing upon oxygen electroreduction in direct methanol fuel cells

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Cited by 253 publications
(171 citation statements)
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“…Even though the effect for ORR is almost the same using Pt 3 Sn/C and Pt/C ETEK, further studies described in this paper have shown that Pt 3 Sn/C presents a higher electrocatalytic activity than Pt/C ETEK for ORR, using ethanol in the electrolyte. The effect observed for the material here highlights the value of Pt 3 Sn/C PPM, which is derived from the electronic effects caused by changes in the platinum "d" band levels (Min, Cho et al, 2000;Aricò, Shukla et al, 2001;Shukla, Neergat et al, 2001;Lima, Lizcano-Valbuena et al, 2006). The onset potentials for the ORR were similar for the two electrocatalysts (see Table I).…”
Section: Electrochemical Experimentsmentioning
confidence: 55%
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“…Even though the effect for ORR is almost the same using Pt 3 Sn/C and Pt/C ETEK, further studies described in this paper have shown that Pt 3 Sn/C presents a higher electrocatalytic activity than Pt/C ETEK for ORR, using ethanol in the electrolyte. The effect observed for the material here highlights the value of Pt 3 Sn/C PPM, which is derived from the electronic effects caused by changes in the platinum "d" band levels (Min, Cho et al, 2000;Aricò, Shukla et al, 2001;Shukla, Neergat et al, 2001;Lima, Lizcano-Valbuena et al, 2006). The onset potentials for the ORR were similar for the two electrocatalysts (see Table I).…”
Section: Electrochemical Experimentsmentioning
confidence: 55%
“…Using Pt/C ETEK, the diffusion limit mass current density for the ORR was 20 % smaller than that using the same electrocatalyst without ethanol. These results can be explained because the strength of adsorption of both CO (Tong, Kim et al, 2002;Alayoglu, Nilekar et al, 2008;Park, Lee et al, 2008) and O 2 (Min, Cho et al, 2000;Aricò, Shukla et al, 2001;Shukla, Neergat et al, 2001;Lima, Lizcano-Valbuena et al, 2006) is reduced in Pt 3 Sn alloy materials, thereby facilitating a release of the catalytic sites and increase of the kinetic reaction.…”
Section: Electrochemical Experimentsmentioning
confidence: 99%
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“…Com o objetivo de otimizar a ação catalítica dos eletrodos através da síntese de novos materiais, métodos alternativos de preparação de catalisadores são encontrados na literatura, tais como a pirólise de acetato de ferro II adsorvido em 3, 4, 9, 10-perylenetetracarboxylic dianhydride em Ar:H 2 :NH 3 [8], ou a preparação de materiais alternativos como os macrociclos de metais suportados em carbono [9] e também ligas binárias e ternárias de Pt com metais de transição [10][11][12].…”
Section: Introductionunclassified
“…Discussões detalhadas referentes às considerações do tamanho das partículas, atividade catalítica e orientação cristalográfica preferencial dos catalisadores também foram feitas por outros pesquisadores [16,20] [15], borohidreto (MB) [22] e Shukla e col. (MS) [11]. Como padrão de comparação foi utilizado o catalisador Pt/C comercial (E-TEK).…”
Section: Introductionunclassified