High performance electrodes with very low platinum loading for polymer electrolyte fuel cells

Kumar, G.Sasi; Raja, M.; Parthasarathy, S.

doi:10.1016/0013-4686(94)00270-b

Cited by 94 publications

(37 citation statements)

References 9 publications

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“…To enlarge the three-dimension reaction zone, extending the active material far from the electrode/electrolyte interface, the contact area between the electronically conductive HSA and the ionically conductive polymer electrolyte must be maximized. A technique of impregnating PTFE bonded electrodes by Nafion solution is frequently used to extend the TPB sites because Nafion provides the path for proton transfer [1][2][3][4][5]. Figure 2 illustrates the schematic diagrams of the threephase reaction zone of a GDE.…”

mentioning

confidence: 99%

Studies of Modified Hydrogen Storage Intermetallic Compounds Used as Fuel Cell Anodes

Chen¹,

Santos²,

Sequeira³

et al. 2011

Crystals

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Abstract:The possibility of substituting Pt/C with the hydrogen storage alloy MlNi 3.6 Co 0.85 Al 0.3 Mn 0.3 as the anode active material of a proton exchange membrane fuel cell system has been analyzed. The electrochemical properties indicate that a much more electrochemically active anode is obtained by impregnating the active material loaded anode in a Nafion proton conducting polymer. Such performance improvement might result from the increase of three-phase boundary sites or length in the gas diffusion electrode where the electrochemical reaction occurs. The experimental data revealed that the membrane electrode assembly (MEA) shows better results when the anode active material, MlNi 3.6 Co 0.85 Al 0.3 Mn 0.3 , is treated with a hot alkaline KBH 4 solution, and then chemically coated with 3 wt.% Pd. The MEA with the aforesaid modification presents an enhanced surface capability for hydrogen adsorption, and has been studied by molecular beam-thermal desorption spectrometry.

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mentioning

confidence: 99%

Studies of Modified Hydrogen Storage Intermetallic Compounds Used as Fuel Cell Anodes

Chen¹,

Santos²,

Sequeira³

et al. 2011

Crystals

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“…Ternary Pt-based catalysts have also been investigated in which an additional oxophilic component such as Sn, Ir, Rh, Os, Mo, W, WO 3 or Re is added to Pt-Ru to promote CO oxidation at lower potentials [116,133,]. Some studies on ternary catalysts without Ru has also been reported, for example Au and Fe additives to Pt was reported to enhance the COtolerant HOR activity as compared to Pt alone [134].…”

Section: Co Tolerant Catalystsmentioning

confidence: 99%

Components for PEM Fuel Cells: An Overview

Maiyalagan

Pasupathi

2010

MSF

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Abstract. Fuel cells, as devices for direct conversion of the chemical energy of a fuel into electricity by electrochemical reactions, are among the key enabling technologies for the transition to a hydrogen-based economy. Among the various types of fuel cells, polymer electrolyte membrane fuel cells (PEMFCs) are considered to be at the forefront for commercialization for portable and transportation applications because of their high energy conversion efficiency and low pollutant emission. Cost and durability of PEMFCs are the two major challenges that need to be addressed to facilitate their commercialization. The properties of the membrane electrode assembly (MEA) have a direct impact on both cost and durability of a PEMFC.An overview is presented on the key components of the PEMFC MEA.. The success of the MEA and thereby PEMFC technology is believed to depend largely on two key materials: the membrane and the electro-catalyst. These two key materials are directly linked to the major challenges faced in PEMFC, namely, the performance, and cost. Concerted efforts are conducted globally for the past couple of decades to address these challenges. This chapter aims to provide the reader an overview of the major research findings to date on the key components of a PEMFC MEA.

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“…Several researches have been done in the latest decade to reduce the amount of Pt in polymer electrolyte membrane fuel cells (PEMFCs) principally in the cathode to reduce its weight, volume, and cost [1][2][3][4][5][6][7][8]. e oxygen reduction reaction (ORR) occurring at the cathode of a PEMFC cell is catalyzed by high loadings of Pt to reduce signi�cantly the overpotential loss.…”

Section: Introductionmentioning

confidence: 99%

High Performance PEM Fuel Cell with Low Platinum Loading at the Cathode Using Magnetron Sputter Deposition

Fofana

Natarajan

Bénard

et al. 2013

ISRN Electrochemistry

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Platinum cluster formations have been investigated as a way to reduce the amount of Pt at the cathode of polymer electrolyte membrane fuel cells. One, two, and three layers of Pt (0.05 mg/cm 2 ) sputtered directly on microporous layers of gas diffusion layers with and without interfacial carbon-Na�on layers and carbon-polytetra�uoroethylene (CP�FE) layers have been used as a cathode. Comparison with experimental results had showed that the best performance was obtained with three layers of Pt sputtered on carbon-Na�on containing 34.8 wt.% of Na�on and sputtered carbon-polytetra�uoroethylene containing 16.9 wt.% of polytetra�uoroethylene. High limiting current densities (>1.1 A/cm 2 ) have been reached with cathode Pt loading as low as 0.05 mg/cm 2 . SEM imagery and cyclic voltammetry characterization have been performed to consolidate this study. High Pt utilization can be showed by this method. e factor in�uencing Pt utilisation in the oxygen reduction reaction is intrinsically related to Pt clusters formation and helps in enhancing the PEMFC performance with low Pt loading.

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High performance electrodes with very low platinum loading for polymer electrolyte fuel cells

Cited by 94 publications

References 9 publications

Studies of Modified Hydrogen Storage Intermetallic Compounds Used as Fuel Cell Anodes

Studies of Modified Hydrogen Storage Intermetallic Compounds Used as Fuel Cell Anodes

Components for PEM Fuel Cells: An Overview

High Performance PEM Fuel Cell with Low Platinum Loading at the Cathode Using Magnetron Sputter Deposition

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