Porous electrodes based on platinum capped electrocatalyst: Combining thermal treatment XPS analysis and electrochemistry give evidence for the stabilizing role of the thiol capping agent on the Pt dispersion and core feature

Volatron, François; Cheng, Xin‐Bing; Albouy, Pierre‐Antoine; Akrour, Laurent; Borta, A.; Pinault, Mathieu; Etchéberry, Arnaud; Pérez, H.

doi:10.1016/j.electacta.2013.01.010

Cited by 3 publications

(2 citation statements)

References 64 publications

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“…90 μV h −1 (i.e., 50% more decay with Nafion), This confirms that the organic polymer is stable under these conditions. This represents a very important result, particularly considering the role of the grafted thiol molecules for the stabilization of the small Pt core as well as for a stable electrochemical response as was proposed by Volatron et al 39 These authors concluded that organically grafted Pt electrocatalysts can be of interest for fuel cell applications, and we are demonstrating here their high potency.…”

Section: ■ Results and Discussionsupporting

confidence: 75%

Fluorine-Free Pt Nanocomposites for Three-Phase Interfaces in Fuel Cell Electrodes

et al. 2016

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The first generation of proton exchange membrane fuel cells uses costly and unsafe perfluorinated sulfonic acid polymers (PFSAs) as membranes and as ionomers impregnating electrodes to achieve the three-phase boundaries. PFSAs imply paramount issues for large-scale manufacture, use, commercialization, and recycling. Alternative nonfluorinated polymers should allow obtaining not only membranes but also adequate ionomer suspensions in convenient solvents for preparing efficient catalytic layers, which has not yet been achieved. Here, we propose a universal solution consisting of the transposition of the three-phase boundary at the molecular level by grafting directly at the surface of carbon-supported Pt nanoparticles a nonfluorinated proton-conducting polymer combining the catalytic activity of the former and the transport properties of the latter. The length of the polystyrenesulfonate polymer chain (as a model polymer) and the number of polymer feet per platinum nanoparticles have been optimized in order to achieve the highest active surface area and activity possible. It was shown that low grafting density and high degree of polymerization gave the best configuration. The great potency of such nanocomposites as cathode catalysts for PEMFC was evidenced not only in a standard three-electrode cell but also under real working conditions in a single hydrogen/oxygen fuel cell, where higher activity and stability were obtained with a nanocomposite material in comparison to those with a classical Pt/C + Nafion electrode.

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Section: ■ Results and Discussionsupporting

confidence: 75%

Fluorine-Free Pt Nanocomposites for Three-Phase Interfaces in Fuel Cell Electrodes

et al. 2016

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“…It has been reported that the modification of metal nanoparticles onto the electrode surface reduces the overpotential of amino acid oxidation and can amplify the electrical signal differences of diastereomeric complexes [31,32]. Meanwhile, Pt nanoparticles (NPs) can be further surface-modified by PtÀ S interaction [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of chiral cyclodextrin metal‐organic framework modified with platinum on glassy carbon electrodes: Electrochemical chiral recognition of methionine enantiomers

et al. 2023

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A platinum nanoparticle‐modified chiral cross‐linked cyclodextrin MOF (Pt‐CLMOF) was synthesized. Then, a chiral electrochemical sensor was constructed using the Pt‐CLMOF nanomaterials for the recognition of methionine (Met) enantiomers and the chiral recognition mechanism was revealed by density functional theory calculations. The recognition effect of Pt‐CLMOF modified electrode (Pt‐CLMOF/GCE) on Met was studied by differential pulse voltammetry. The enantioselectivity coefficient (IL/ID) was 1.98. There is an acceptable linear relationship between peak current and Met enantiomer concentration in the 2–200 μM range, the detection limits of L–Met and D‐Met were 0.33 and 0.60 μM which were obtained by this electrochemical sensor, respectively. The synthesized materials were successfully applied to the analysis of Met enantiomers, indicating that Pt‐CLMOF materials have good application potentiality.

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A novel design of engineered multi-walled carbon nanotubes material and its improved performance in simultaneous detection of Cd(II) and Pb(II) by square wave anodic stripping voltammetry

Zhou

et al. 2016

Sensors and Actuators B: Chemical

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Porous electrodes based on platinum capped electrocatalyst: Combining thermal treatment XPS analysis and electrochemistry give evidence for the stabilizing role of the thiol capping agent on the Pt dispersion and core feature

Cited by 3 publications

References 64 publications

Fluorine-Free Pt Nanocomposites for Three-Phase Interfaces in Fuel Cell Electrodes

Fluorine-Free Pt Nanocomposites for Three-Phase Interfaces in Fuel Cell Electrodes

Synthesis of chiral cyclodextrin metal‐organic framework modified with platinum on glassy carbon electrodes: Electrochemical chiral recognition of methionine enantiomers

A novel design of engineered multi-walled carbon nanotubes material and its improved performance in simultaneous detection of Cd(II) and Pb(II) by square wave anodic stripping voltammetry

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