Oxygen reduction on well-defined platinum nanoparticles inside recast ionomer

Gamez, A.; Richard, Dominique; Gallezot, P.; Gloaguen, Frédéric; Faure, R.; Durand, Robert

doi:10.1016/0013-4686(95)00305-x

Cited by 148 publications

(86 citation statements)

References 11 publications

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“…In addition to their interesting physical properties, catalysis can be considered as one of the most popular applications, due to their high catalytic activities for many chemical reactions, including hydrogenation (15), photo-induced hydrogen production (16), electro-catalytic oxidation of methanol or formic acid (17,18), catalytic reduction of oxygen (19) and other redox reactions (20,21). Therefore, we consider that colloidal platinum nanoparticles might be an effective catalyst for CL.…”

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confidence: 99%

Luminol chemiluminescence catalysed by colloidal platinum nanoparticles

Cui

2006

Luminescence

103

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Platinum colloids prepared by the reduction of hexachloroplatinic acid with citrate in the presence of different stabilizers were found to enhance the chemiluminescence (CL) of the luminol-H(2)O(2) system, and the most intensive CL signals were obtained with citrate-protected Pt colloids synthesized with citrate as both a reductant and a stabilizer. Light emission was intense and reproducible. Transmission electron microscopy and X-ray photoelectron spectroscopy studies were conducted before and after the CL reaction to investigate the possible CL enhancement mechanism. It is suggested that this CL enhancement is attributed to the catalysis of platinum nanoparticles, which could accelerate the electron-transfer process and facilitate the CL radical generation in aqueous solution. The effects of Pt colloids prepared by the hydroborate reduction were also investigated. The application of the luminol-H(2)O(2)-Pt colloids system was exploited for the determination of compounds such as uric acid, ascorbic acid, phenols and amino acids.

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mentioning

confidence: 99%

Luminol chemiluminescence catalysed by colloidal platinum nanoparticles

Cui

2006

Luminescence

103

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“…[13] This deactivation due to a saturation of all available adsorption sites on the catalyst might prevent access to aniline monomers. [14] However, aniline oxidation efficiency and rate are also certainly depending on the temperature too. The film growth during the electroless deposition was also studied as a function of the reaction time.…”

Section: Resultsmentioning

confidence: 99%

Electroless deposition of polyaniline: synthesis and characterization

Attout

Yunus

Bertrand

2008

Surface & Interface Analysis

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Polyaniline (PANi), as conductive polymer, constitutes an attractive material for electronic and optical applications. Different from electropolymerization and chemical oxidative polymerization, electroless deposition is another method for synthesizing PANi. Aniline can polymerize slowly and spontaneously on platinum or palladium surface in an aqueous acid solution of the monomer. This reaction proceeds via an electrochemical mechanism that involves the reduction of dissolved oxygen as cathodic and oxidation of aniline as anodic half-reactions at the metal/solution interface. PANi, obtained by electroless synthesis, was compared to chemical oxidative and electropolymerized ones by XPS and SEM. The product of electroless deposition is found to be chemically similar to the others but its morphology is different. The PANi film growth and morphology are studied as a function of time and temperature.

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“…[1][2][3][4][5] It is well known that the electrocatalytic activity of palladium nanoparticles for methanol oxidation is dependent on many factors. 6,7 Among these factors, new support materials and their surface condition are the key factors to improve the performance of DMFC. 8 Though attempts have been made to achieve high efficiencies by effectively dispersing Pd and Pd based particles onto the various support materials, more effort is still necessary.…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Palladium Nanoparticles on Functional MWNT Surfaces for Methanol Oxidation in Alkaline Solutions

Wang

Zhu

Li³

et al. 2008

Chin. J. Chem.

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Palladium nanoparticles were crystallized on 4-aminobenzoic acid monolayer-grafted multi-walled carbon nanotubes (MWNT) by diazotization. The structure and nature of the resulting Pd/MWNT composite were characterized by transmission electron microscopy and X-ray diffraction, the results show that the chemically synthesized Pd nanoparticles were homogeneously dispersed and well-separated from one another on the modified MWNT surfaces. Cyclic voltammogram showed that the Pd-MWNT composite materials performed higher electrocatalytic activity and better long-term stability toward methanol oxidation in alkaline solution than Pd-C. The results imply that the Pd-MWNT composite materials as a promising support material improve the excellent electrocatalytic activity for methanol oxidation greatly. So the Pd/MWNT composites have a good application potential to fuel cells.

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Oxygen reduction on well-defined platinum nanoparticles inside recast ionomer

Cited by 148 publications

References 11 publications

Luminol chemiluminescence catalysed by colloidal platinum nanoparticles

Luminol chemiluminescence catalysed by colloidal platinum nanoparticles

Electroless deposition of polyaniline: synthesis and characterization

Highly Dispersed Palladium Nanoparticles on Functional MWNT Surfaces for Methanol Oxidation in Alkaline Solutions

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