Mixed layered WO3/ZrO2 films (with and without rhodium) as active supports for PtRu nanoparticles: enhancement of oxidation of ethanol

Rutkowska, Iwona A.; Wadas, Anna; Kulesza, Paweł J.

doi:10.1016/j.electacta.2016.05.186

Cited by 22 publications

(16 citation statements)

References 96 publications

(173 reference statements)

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“…There is no direct contribution from zirconia because ZrO 2 is not electroactive in the investigated range of potentials. A slight increase in the observed voltammetric currents upon supporting onto the zirconia matrix is likely to reflect the capacitive charging-discharging properties of ZrO 2 [66][67][68]. The fact that both voltammetric responses of Fig.…”

Section: Resultsmentioning

confidence: 92%

“…Deposition of the ZrO 2 film (on the glassy carbon electrode substrate) was performed as before [62,[64][65][66][67][68][69] via sol-gel aggregation induced by the repetitive voltammetric cycling (25 full potential cycles at 10 mV s −1 from 0.04 to 1.04 V vs. RHE) in the solution for modification obtained by dispersing 0.3 ml of 5%wt. aqueous suspension of ZrO 2 nanoparticles in 30 ml 0.5 mol dm 3 H 2 SO 4 .…”

Section: Methodsmentioning

confidence: 99%

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Enhancement of oxidation of dimethyl ether through application of zirconia matrix for immobilization of noble metal catalytic nanoparticles

Rutkowska

Sęk

Zelenay

et al. 2020

J Solid State Electrochem

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Electrocatalytic activity of Pt and bimetallic PtRu nanoparticles (both Vulcan supported and unsupported) toward electrooxidation of dimethyl ether (DME), a potential small organic molecule fuel, in an acid medium (0.5 mol dm−3 H2SO4) has been significantly enhanced by dispersing them over a thin film of zirconia (ZrO2). The enhancement effects concern increases of the DME electrocatalytic current densities recorded under both cyclic voltammetric and chronoamperometric conditions. Similar effects have been observed for the oxidation of methanol. Regarding the dissimilar DME electrooxidation mechanisms at Pt and PtRu catalytic centers, the activating capabilities of zirconia seem to originate from the high population of reactive –OH groups favoring mobility of protons and the capability of inducing the oxidative removal of poisoning (CO-type) intermediates both at platinum and ruthenium catalytic sites. In the presence of the zirconia matrix, the onset potential for the oxidation of DME (particularly at PtRu) is shifted more than 50 mV toward less positive potentials. Mutual metal-support interactions are also postulated.

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Section: Resultsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Enhancement of oxidation of dimethyl ether through application of zirconia matrix for immobilization of noble metal catalytic nanoparticles

Rutkowska

Sęk

Zelenay

et al. 2020

J Solid State Electrochem

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“…PtRu alloy NPs were then loaded on it. By such kind of construction, the favorable proton mobility especially at Zr oxide sites, couples with high population of −OH surface groups, to enhance oxidative removal of poisonous intermediates for efficient ethanol oxidation . Since widespread use of perfluorinated polymer membrane for the past decades, these acid‐stable Mo, W and Sn‐based compounds with atomic tunability and strong interaction with precious metals are considered to be the ideal candidates as supports for anodes in acidic PEFCs.…”

Section: Self‐supported/non‐precious Metal Materialsmentioning

confidence: 99%

“…The lower surface electron density is known to be advantageous for stabilization and activation of formic acid, and thus enables Pd/WO 2.72 to export a high activity for formic acid oxidation. A W oxide/Zr oxide hybrid support was also developed through voltammetric potential cycling by Rutkowska et al . This hybrid support is stabilized by crosslinking of anionic tungstate species and cationic oxo‐zirconium surface units.…”

Section: Self‐supported/non‐precious Metal Materialsmentioning

confidence: 99%

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

Huang

Babu

et al. 2018

ChemCatChem

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Polymer electrolyte fuel cells (PEFCs) are among the most advanced energy technologies with low operating temperatures, high energy densities, ease of transportation and storage. However, the deficiencies such as low activity and high cost of the electrocatalysts at anodes greatly hinder their commercialization. The commonly used carbon black supports lack the capacity of regulation over the supported noble metals towards efficient electro‐catalytic oxidation of fuels. In this Mini‐Review, the prerequisite factors in advanced supports are outlined, ranging from self‐supported precious metal alloys as well as non‐noble metal materials, while simultaneously revealing the superiorities of some advanced supports beyond carbon black in terms of electronic conductivity, synergy with surface precious metals, chemical and electrochemical stability, and other possible interactions. The effects arisen from microscopic morphology, nano‐structure, and composition on the electrocatalytic activity/stability are also discussed. Finally, several of the most promising supports are highlighted, and the research trends of synergistic supports in future PEFCs are predicted.

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“…Since tungsten(VI) oxides are simply prepared and provide high chemical stability [11] they are widely used in many catalytic reactions such as oxidative desulfurization [12], dehydration of 2-Butanol [13], pentane isomerization [14], acetalization [15]. Recently, the promoting effect of WO 3 on noble NPs used as catalysts in ethanol [16,17], methanol [18] and CO [19] oxidations have been confirmed. On the other hand, tungsten(VI) oxides are considered to be used in hydrogenation reactions because the dissociation of H 2 molecules to H δ+ ionic species could easily be stabilized on WO 3 structure [17].…”

Section: Introductionmentioning

confidence: 99%

Tungsten(VI) Oxide Supported Rhodium(0) Nanoparticles Used as Catalyst in Hydrogenation of Benzene at Room Temperature

Akbayrak¹

2018

HJBC

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Ö ZR odyum(III) iyonları ilk önce sulu çözelti içinde tungsten(VI) oksit (WO 3 ) üzerine tutturulmuş ve WO 3 yüzeyi üzerinde rodyum(0) nanoparçacıkları (Rh NPs) oluşturmak için sulu NaBH 4 ile indirgenmiştir. Rh NPs/WO 3 katalizörü santrifüjleme ile ayrıldıktan sonra gelişmiş analitik tekniklerle tanımlanmıştır. Sonuçlar Rh NPs'nin başarılı bir şekilde WO 3 yüzeyinde oluştuğunu göstermektedir. Rh NPs/WO 3 katalizörünün 131 h-1 çevrim frekansı değeri ile 25.0±0.1ºC' de solventsiz benzen hidrojenlenmesinde çok aktif olduğu bulunmuştur Anahtar Kelimeler Tungsten(VI) oksit, rodyum nanoparçacıkları, benzen, hidrojenlenme. A B S T R A C TR hodium(III) ions were first impregnated on the surface of tungsten(VI) oxide (WO 3 ) in aqueous solution and reduced with aqueous NaBH 4 to form rhodium(0) nanoparticles (Rh NPs) on the surface of WO 3 . After the isolation of the Rh NPs/WO 3 catalyst by centrifugation, it was characterized by advanced analytical techniques. The results reveal the successful formation of Rh NPs on the surface of WO 3 . Rh NPs/WO 3 catalyst with a turnover frequency value of 131 h-1 was found to be very active in hydrogenation of neat benzene at 25.0±0.1ºC.

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Mixed layered WO3/ZrO2 films (with and without rhodium) as active supports for PtRu nanoparticles: enhancement of oxidation of ethanol

Cited by 22 publications

References 96 publications

Enhancement of oxidation of dimethyl ether through application of zirconia matrix for immobilization of noble metal catalytic nanoparticles

Enhancement of oxidation of dimethyl ether through application of zirconia matrix for immobilization of noble metal catalytic nanoparticles

Synergistic Supports Beyond Carbon Black for Polymer Electrolyte Fuel Cell Anodes

Tungsten(VI) Oxide Supported Rhodium(0) Nanoparticles Used as Catalyst in Hydrogenation of Benzene at Room Temperature

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