Activation of carbon-supported platinum nanoparticles by zeolite-type cesium salts of polyoxometallates of molybdenum and tungsten towards more efficient electrocatalytic oxidation of methanol and ethanol

Zurowski, Artur; Kolary-Zurowska, Aneta; Dsoke, Sonia; Barczuk, Piotr J.; Marassi, Roberto; Kulesza, Paweł J.

doi:10.1016/j.jelechem.2010.04.021

Cited by 36 publications

(16 citation statements)

References 47 publications

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“…The improvement of catalytic activities of systems containing molybdenum and tungsten oxide for CO electrooxidation was also confirmed by theoretical studies [40,41]. When it comes to oxidation of ethanol, modification of PtSn nanoparticles with polymolybdates or polytungstates [9,[42][43][44], with tungsten oxide [10] or molybdenum oxide [31], has also resulted in the enhancement of the system's electrocatalytic properties.…”

Section: Introductionmentioning

confidence: 65%

Enhancement of activity of PtRh nanoparticles towards oxidation of ethanol through modification with molybdenum oxide or tungsten oxide

Miecznikowski

2012

J Solid State Electrochem

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Electrocatalytic systems utilizing carbon (Vulcan)-supported PtRh nanoparticles (PtRh/Vulcan) admixed with either molybdenum oxide or tungsten oxide were tested and compared during electrooxidation of ethanol. The systems' performance was diagnosed using electrochemical techniques such as voltammetry and chronoamperometry. The proposed electrocatalytic materials were also characterized with X-ray diffraction (XRD), transmission and scanning electron microscopies (TEM and SEM), as well as SEM-coupled energy dispersive X-ray spectroscopy (SEM-EDX). For both systems containing molybdenum and tungsten oxides, enhancements in catalytic activities (relative to the behavior observed at bare PtRh/Vulcan nanoparticles) were found during ethanol electrooxidation at room temperature (22°C). Further, it was from chronoamperometric current (density)-time responses that anodic electrocatalytic currents measured at 0.3 V (vs. RHE) were more than 20% higher in the case of the MoO 3 -containing PtRh/Vulcan system relative to that utilizing WO 3 . The diagnostic "CO-stripping" experiments were consistent with the view that addition of molybdenum oxide or tungsten oxide to PtRh/Vulcan tended to shift potential for the oxidation of inhibiting CO-adsorbate ca. 80 or 40 mV towards less negative values in comparison to the analogous but oxide-free system. The fact that carbon (Vulcan)-supported PtRu nanoparticles exhibited higher electrocatalytic reactivity observed phenomena may be attributed to specific interactions between noble metal centers and the oxides in addition to chemical reactivity of metal oxo groups in the vicinity of PtRh/ Vulcan at the electrocatalytic interface.

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Section: Introductionmentioning

confidence: 65%

Enhancement of activity of PtRh nanoparticles towards oxidation of ethanol through modification with molybdenum oxide or tungsten oxide

Miecznikowski

2012

J Solid State Electrochem

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“…The Cs-POM salt could behave as redox mediator agent for the CO-adsorbed on Pt surface [47]. The proposed mechanism proceeds via the following reaction scheme involving the molybdate group in the cesium salt [20]: 40 (10)…”

Section: Electrochemical Characterization With Rrdementioning

confidence: 99%

Rotating disk electrode study of Pt/Cs3HPMo11VO40 composite catalysts for performing and durable PEM fuel cells

Renzi

Mignini

Giuli

et al. 2016

International Journal of Hydrogen Energy

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“…They also have been considered for application in Proton Exchange Membrane Fuel Cells, PEMFCs, due to their specific reactivity, capability to modify properties of catalytic surfaces (also of importance to electrooxidation of alcohols), and high protonic conductivity [13,73]. The latter property may permit fabrication of electrode materials in such a manner that obviates the need for an ionomer [13,59,65,74]. HPAs can assist in transferring electrons in the electrochemical oxidation of CO [13,59,65,74,75].…”

Section: Polyoxometallates As Model Metal Oxide Supports and Acidimentioning

confidence: 99%

Electrocatalytic oxidation of small organic molecules in acid medium: Enhancement of activity of noble metal nanoparticles and their alloys by supporting or modifying them with metal oxides

Kulesza

Pieta

Rutkowska

et al. 2013

Electrochimica Acta

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107

114

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Different approaches to enhancement of electrocatalytic activity of noble metal nanoparticles during oxidation of small organic molecules (namely potential fuels for low-temperature fuel cells such as methanol, ethanol and formic acid) are described. A physical approach to the increase of activity of catalytic nanoparticles (e.g. platinum or palladium) involves nanostructuring to obtain highly dispersed systems of high surface area. Recently, the feasibility of enhancing activity of noble metal systems through the formation of bimetallic (e.g. PtRu, PtSn, and PdAu) or even more complex (e.g. PtRuW, PtRuSn) alloys has been demonstrated. In addition to possible changes in the electronic properties of alloys, specific interactions between metals as well as chemical reactivity of the added components have been postulated. We address and emphasize here the possibility of utilization of noble metal and alloyed nanoparticles supported on robust but reactive high surface area metal oxides (e.g. WO3, MoO3, TiO2, ZrO2, V2O5, and CeO2) in oxidative electrocatalysis. This paper concerns the way in which certain inorganic oxides and oxo species can act effectively as supports for noble metal nanoparticles or their alloys during electrocatalytic oxidation of hydrogen and representative organic fuels. Among important issues are possible changes in the morphology and dispersion, as well as specific interactions leading to the improved chemisorptive and catalytic properties in addition to the feasibility of long time operation of the discussed systems.

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Activation of carbon-supported platinum nanoparticles by zeolite-type cesium salts of polyoxometallates of molybdenum and tungsten towards more efficient electrocatalytic oxidation of methanol and ethanol

Cited by 36 publications

References 47 publications

Enhancement of activity of PtRh nanoparticles towards oxidation of ethanol through modification with molybdenum oxide or tungsten oxide

Enhancement of activity of PtRh nanoparticles towards oxidation of ethanol through modification with molybdenum oxide or tungsten oxide

Rotating disk electrode study of Pt/Cs3HPMo11VO40 composite catalysts for performing and durable PEM fuel cells

Electrocatalytic oxidation of small organic molecules in acid medium: Enhancement of activity of noble metal nanoparticles and their alloys by supporting or modifying them with metal oxides

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