A novel Pt/Cr/Ru/C cathode catalyst for direct methanol fuel cells (DMFC) with simultaneous methanol tolerance and oxygen promotion

Pérez, G.; Pastor, E.; Zinola, C.F.

doi:10.1016/j.ijhydene.2009.09.088

Cited by 47 publications

(18 citation statements)

References 39 publications

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“…The Tafel slopes of the Pt-Sn/C HA Slurry pH3 were almost the same to that of the commercial Pt/C. This could be explained in terms of the coverage of the electrode surface by adsorbed oxygen which follows a Langmuir isotherm (low coverage) at high overpotential and a Temkin isotherm (high coverage) at lower overpotentials [1,31,32].…”

Section: Oxygen Reduction Kinetics Of Pt-sn/c Catalystsmentioning

confidence: 84%

“…This implies that the rate-determining step for the ORR is unchanged for both catalyst despite some differences in their electrocatalytic properties [1,32]. However, Tafel slopes values calculated by ORR for the other Pt-Sn/C catalyst suggest a rather complex reaction mechanism(s).…”

Section: Oxygen Reduction Kinetics Of Pt-sn/c Catalystsmentioning

confidence: 99%

“…There are a large number of applications for DMFCs especially in stationary devices, portable electrical devices and transportation [1]. The use of methanol as a fuel has a few advantages in comparison to hydrogen.…”

Section: Introductionmentioning

confidence: 99%

“…The use of methanol as a fuel has a few advantages in comparison to hydrogen. For example, methanol is an inexpensive liquid fuel which can be easily transported, stored and handled [1,2]. However, despite these advantages and progress made in the development of DMFCs, the performance is still limited due to the poor kinetics of both anode and cathode reaction and the methanol crossover from the anode to the cathode side through the polymer electrolyte membrane (PEM) [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Pt–Sn/C as a Possible Methanol-Tolerant Cathode Catalyst for DMFC

et al. 2013

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An effective method was developed for preparing highly dispersed nano-sized Pt-Sn/C electrocatalyst synthesised by a modified polyol reduction method. From XRD patterns, the Pt-Sn/C peaks shifted slightly to lower 2θ angles when compared with commercial Pt/C catalyst, suggesting that Sn formed alloy with Pt. Based on HR-TEM images, the PtSn/C nanoparticles showed small particle sizes and well dispersed onto the carbon support with a narrow particle distribution. The methanol oxidation reaction on the asprepared Pt-Sn/C catalyst appeared at lower currents (+7.08 mA at +480 mV vs. Ag/AgCl) compared to the commercial Pt/C (+8.25 mA at +480 mV vs. Ag/AgCl) suggesting that the Pt-Sn/C catalyst has 'methanol tolerance capabilities'. Pt-Sn/C HA Slurry pH3 catalysts showed better activity towards the oxygen-reduction reaction (ORR) than commercial Pt/C which could be attributed to smaller particle sizes. In our study, the Pt-Sn/C catalyst appears to be a promising methanol-tolerant catalyst with activity towards the ORR in the DMFC. IntroductionIn recent years, considerable attention and R&D funding have been injected into direct methanol fuel cell (DMFC) technologies. There are a large number of applications for DMFCs especially in stationary devices, portable electrical devices and transportation [1]. The use of methanol as a fuel has a few advantages in comparison to hydrogen. For example, methanol is an inexpensive liquid fuel which can be easily transported, stored and handled [1,2]. However, despite these advantages and progress made in the development of DMFCs, the performance is still limited due to the poor kinetics of both anode and cathode reaction and the methanol crossover from the anode to the cathode side through the polymer electrolyte membrane (PEM) [3,4]. In many cases, this methanol crossover issue decreases the fuel cell efficiency and produces mixed currents due to methanol oxidation on the cathode side, resulting in cell voltage losses [2][3][4]. Moreover, the crossover effect in the DMFC membrane causes a further decrease in the cathode efficiency due to the occurrence of a mixed potential, which results from the competitive reaction between oxygen reduction and methanol oxidation on Pt cathode [5]. To avoid this problem, one strategy is to modify the existing membranes or to develop novel membranes with less methanol permeability. Another approach is to develop methanol-tolerant cathode catalysts such as binary platinum alloys containing Co, Ni,. Various

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Section: Oxygen Reduction Kinetics Of Pt-sn/c Catalystsmentioning

confidence: 84%

Section: Oxygen Reduction Kinetics Of Pt-sn/c Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pt–Sn/C as a Possible Methanol-Tolerant Cathode Catalyst for DMFC

et al. 2013

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“…10 Perez reported a novel Chromium last deposited carbon supported Pt/Cr/Ru catalysts had better methanol tolerance propertied used in DMFC. 11 Neburchilov reported a novel quaternary Pt-Ru-Ir-Sn catalyst with low Pt content. The resulted showed that the catalyst (0.3Pt 0.3Ir 0.3Ru 0.1Sn)/C had a performance close to the commercial E-TEK electrode while the most expensive part of the catalyst Pt was only 0.1 mg/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of nano Pt and Pt-based alloys electrocatalysts for direct methanol fuel cells and their properties

et al. 2014

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The electrocatalysts used in micro direct methanol fuel cell (μDMFC), such as Pt/C and Pt alloy/C, prepared by liquid-phase NaBH4 reduction method have been investigated. XC-72 (Cobalt corp. Company, U.S.A) is chosen as the activated carrier for the electrocatalysts to keep the catalysts powder in the range of several nanometers. The XRD, SEM, EDX analyses indicated that the catalysts had small particle size in several nanometers, in excellent dispersed phase and the molar ratio of the precious metals was found to be optimal. The performances of the DMFCs using cathodic catalyst with Pt percentage of 30wt% and different anodic catalysts (Pt-Ru, Pt-Ru-Mo) were tested. The polarization curves and power density curves of the cells were measured to determine the optimal alloy composition and condition for the electrocatalysts. The results showed that the micro direct methanol fuel cell with 30wt% Pt/C as the cathodic catalyst and n(Pt):n(Ru):n(Mo) = 3:2:2 PtRuMo/C as the anodic catalyst at room temperature using 2.0mol/L methanol solution has the best performances.

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Energy Applications: Fuel Cells

Çelebi

2016

Advanced Electrode Materials

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A novel Pt/Cr/Ru/C cathode catalyst for direct methanol fuel cells (DMFC) with simultaneous methanol tolerance and oxygen promotion

Cited by 47 publications

References 39 publications

Pt–Sn/C as a Possible Methanol-Tolerant Cathode Catalyst for DMFC

Pt–Sn/C as a Possible Methanol-Tolerant Cathode Catalyst for DMFC

Investigation of nano Pt and Pt-based alloys electrocatalysts for direct methanol fuel cells and their properties

Energy Applications: Fuel Cells

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