Influência Da Composição Dos Nanofios Pt-Ir/C Na Atividade Catalítica Frente a Oxidação Eletroquímica De Etanol Em Meio Ácido

Almeida, G. R. O.; Sussuchi, Eliana Midori; Meneses, C.T.; Costa, Luiz Pereira da; Salazar‐Banda, Giancarlo R.; Eguiluz, Katlin Ivon Barrios

doi:10.21577/0100-4042.20170469

Cited by 1 publication

(1 citation statement)

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“…In this work, the in uence of different calcination temperatures and different amounts of Sr mixed with the Mo contact during SrMoO 4 preparation on MOR and CO tolerance was investigated. Although commercial PtRu-C (E-TEK) catalyst has a higher MOR and more tolerance CO poisoning than commercial Pt/C [32][33], its cost is twice that Pt/C cause more limiting applied in DMFCs. Therefore, the results in this study focus on comparing with commercial Pt/C.…”

Section: Introductionmentioning

confidence: 99%

Improved the methanol electrooxidation and carbon monoxide tolerance for direct methanol fuel cells using strontium molybdate

Chiang

Hsu

2022

Preprint

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Electrocatalysts possess high methanol electrooxidation (MOR) and carbon monoxide (CO) tolerance abilities to meet application requirements for enhanced performance of direct methanol fuel cells (DMFCs). Higher MOR and CO tolerance activities measured via cyclic voltammetry (CV) are achieved based on a strontium molybdate (SrMoO4) mixed with Vulcan XC-72 carbon and loaded with 20% Pt. The synergistic effect of the bifunctional mechanism inducing the strontium molybdate is beneficial for removing CO-like intermediate products on the Pt surface, which leads to more Pt active sites released during MOR. The simultaneous unique structural formation of HxMoO3/HyMoO3 and SrMoO3 in uncalcined Sr0.5Mo0.5O4−δ provides key synergistic effects for the 20%-Pt/uncalcined Sr0.5Mo0.5O4−δ-C electrocatalysts, improving DMFCs performance. Results show that the 20%-Pt/uncalcined Sr0.5Mo0.5O4−δ-C electrocatalysts exhibit excellent electrocatalytic activity for MOR (with a forward peak current density of 12.56 mA/cm2 and large electrochemically active surface area (ECSAH) of 116.53 m2/g, the best CO tolerance for electrooxidation of carbon monoxide (largest ECSACO of 116.53 m2/g), and the highest electric conductivity (Rct of 940 Ω∙cm2). Furthermore, the fabricated DMFC shows excellent long-term electrochemical stability after 1000 cycles and a maximum power density (1.42 mW/cm2) higher than that with commercial 20%-Pt/C (1.27 mW/cm2).

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Section: Introductionmentioning

confidence: 99%