In situ formation of platinum nanoparticles in Nafion recast film for catalyst-incorporated ion-exchange membrane in fuel cell applications

Lee, Pyoung‐Chan; Han, Tai-Hoon; Kim, Dong Ouk; Lee, Jun-Ho; Kang, Soo‐Jung; Chung, Chan‐Hwa; Lee, Youngkwan; Cho, Sung M.; Choi, Hyoukryeol; Kim, Taesung; Lee, Eun-Sook; Nam, Jae‐Do

doi:10.1016/j.memsci.2008.05.054

Cited by 24 publications

(17 citation statements)

References 21 publications

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“…49,50 This feature is ascribed to EDA-modified CCMs, which leads to an increment of proton conductivity (decrease of Ohmic resistance) and, finally, CCM performance. 30 In the assessment, the effects of EDA-modifying and NaOH attendance on the performance of CCMs are thinner thickness and a good distribution of Pt particles in CCM-EDA-A, which led to higher ECSA and proton conductivity, and, as a consequence, increases the maximum power density up to 29.7% and 6.6%, compared with CCM-D2 and CCM-EDA, respectively. However, the fuel cell performance in this work was not higher than that observed in other studies.…”

Section: Electrochemical Characterization Of Ccmsmentioning

confidence: 94%

“…Depth and density of catalyst layer had an extreme influence on the WU of the Pt-coated membrane. 30,36 As has been reported in the specifications of the Nafion, ionic clusters that have been loaded by Pt had less water absorption, and this related to clogging of the absorbing water channels. According to Mauritz et al, 35 each of the sulfonic groups on Nafion is responsible for adsorb 21 units of the water molecule.…”

mentioning

confidence: 87%

“…According to Figures 2a and 2b, when the temperature rises, nanoparticles appeared, in smaller size and uniform deposition; this observation proved that, using this method, increases in temperature caused decreases in the size of the nanoparticles. 11,30 Figures 2a′ and 2b′ proved that better penetration and higher porosity of Pt particles accrue at higher temperatures. The thickness and the quality of Pt layer were dependent on the duration of the process.…”

mentioning

confidence: 87%

“…Therefore, controlling the layering thickness was an important principal in creating catalytic layers with desirable conditions. 17,30,35 Comparison of the CCMs reveals the effect of each parameter on the nanostructure of the Pt nanoparticle's region. As the images show, the surface morphology of the CCMs changes considerably as a function of conditions.…”

mentioning

confidence: 99%

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Influence of Pt Nanoparticle Electroless Deposition Parameters on the Electrochemical Characteristics of Nafion-Based Catalyst-Coated Membranes

Hosseinabadi

Javanbakht

Naji

et al. 2018

Ind. Eng. Chem. Res.

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Platinum (Pt) catalyst-coated membranes (CCMs) were prepared using controllable, low-cost, and low-energy-consumption electroless deposition methods and is considered as a catalyst electrolyte for proton exchange membrane fuel cells. The influence of experimental conditions such as temperature, duration of absorption and reduction processes, type of solvent, pH of reaction, and ethylenediamine (EDA) as a modifier, on the structural, physicochemical, and electrochemical characteristics of CCMs were investigated for this method. The morphological analyses reveal that the smallest Pt nanoparticles (7.8 nm) were formed at 40 °C, pH 14, and by means of EDA. This sample appeared to have the highest ionic conductivity, water uptake (WU), and capacitive characteristics. Cation acceptation was observed for the first time by modifying the surface of Nafion with EDA. The electrochemical active surface area for optimum CCM was 7.85 m2 g–1, and the current density obtained at 0.5 V was 750 mA cm–2.

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Section: Electrochemical Characterization Of Ccmsmentioning

confidence: 94%

mentioning

confidence: 87%

mentioning

confidence: 87%

mentioning

confidence: 99%

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Influence of Pt Nanoparticle Electroless Deposition Parameters on the Electrochemical Characteristics of Nafion-Based Catalyst-Coated Membranes

Hosseinabadi

Javanbakht

Naji

et al. 2018

Ind. Eng. Chem. Res.

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“…At the end of the platinum deposition, the catalyzed Nafion membranes were washed with deionized water several times to eliminate excess NaBH 4 ions. After this, the Pt/Nafion 117 membrane was exchanged to H + form with 1 M H 2 SO 4 prior to drying for weighing [26]- [29]. coater system, model KW-4A.…”

Section: Ptcl 4ementioning

confidence: 99%

Oxygen Reduction Reaction (ORR) on Platinum Coated Nafion Membrane: Effects of Synthesis Conditions

Chabi¹,

Kheirmand²

2016

OALib

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The present study describes the catalytic activity of the platinum coated Nafion membranes towards oxygen reduction reaction in proton exchange membrane fuel cells. In contrast to the conventional three layered structures of the gas diffusion electrode, as-made gas diffusion electrodes are two layered in which the platinum electrocatalyst are deposited directly onto the Nafion membrane. Spin-coating method and impregnation-reduction approaches were used to synthesize Pt-coated Nafion membranes. Both methods showed comparable results. The performance data revealed that the catalytic activity of the Nafion-Pt-GDL electrode was strongly affected by the Nafion treatment and platinum crystal structures. The results suggest that spin-coated method is a very successful technique for producing low loading of platinum electrocatalyst. Not only platinum catalyst, but also a wide arrange of catalyst-coated Nafion membranes such as palladium/Nafion can be prepared by this approach.

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Evaluating Platinum‐Based Ionic Polymer Metal Composites as Potentiometric Sensors for Dissolved Ozone in Ultrapure Water Systems

Grimmig

Gillemot

Lindner

et al. 2023

Adv Materials Technologies

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Monitoring the content of dissolved ozone in purified water is often mandatory to ensure the appropriate levels of disinfection and sanitization. However, quantification bears challenges as colorimetric assays require laborious off-line analysis, while commercially available instruments for electrochemical process analysis are expensive and often lack the possibility for miniaturization and discretionary installation. In this study, potentiometric ionic polymer metal composite (IPMC) sensors for the determination of dissolved ozone in ultrapure water (UPW) systems are presented. Commercially available polymer electrolyte membranes are treated via an impregnation-reduction method to obtain nanostructured platinum layers. By applying 25 different synthesis conditions, layer thicknesses of 2.2 to 12.6 μm are obtained. Supporting radiographic analyses indicate that the platinum concentration of the impregnation solution has the highest influence on the obtained metal loading. The sensor response behavior is explained by a Langmuir pseudo-isotherm model and allows the quantification of dissolved ozone to trace levels of less than 10 μg L −1 . Additional statistical evaluations show that the expected Pt loading and radiographic blackening levels can be predicted with high accuracy and significance (R 2 adj. > 0.90, p < 10 −10 ) solely from given synthesis conditions.

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In situ formation of platinum nanoparticles in Nafion recast film for catalyst-incorporated ion-exchange membrane in fuel cell applications

Cited by 24 publications

References 21 publications

Influence of Pt Nanoparticle Electroless Deposition Parameters on the Electrochemical Characteristics of Nafion-Based Catalyst-Coated Membranes

Influence of Pt Nanoparticle Electroless Deposition Parameters on the Electrochemical Characteristics of Nafion-Based Catalyst-Coated Membranes

Oxygen Reduction Reaction (ORR) on Platinum Coated Nafion Membrane: Effects of Synthesis Conditions

Evaluating Platinum‐Based Ionic Polymer Metal Composites as Potentiometric Sensors for Dissolved Ozone in Ultrapure Water Systems

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