Increased Electrochemical Oxidation Rate of Alcohols in Alkaline Media on Palladium Surfaces Electrochemically Modified by Antimony, Lead, and Tin

Sadiki, Amissi; Vo, Paul; Hu, Shouzhen; Copenhaver, Thomas S.; Scudiero, Louis; Ha, Su; Haan, John L.

doi:10.1016/j.electacta.2014.07.019

Cited by 44 publications

(32 citation statements)

References 32 publications

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“…Ethylene glycol and glycerol may adsorb on the catalytic surface via more than one R OH groups, and the rate of oxidation of those molecules will be directly dependent on the availability of hydroxyls in the vicinity of adsorbed COH groups. Therefore, having copper and copper oxide populated with OH groups will facilitate two step electrooxidation mechanism: (a) adsorption of EG and glycerol on the catalyst surface and (b) desorption of oxidized acyls [46].…”

Section: Tablementioning

confidence: 99%

Highly-active Pd–Cu electrocatalysts for oxidation of ubiquitous oxygenated fuels

Serov

Asset

Padilla

et al. 2016

Applied Catalysis B: Environmental

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a b s t r a c tNanostructured palladium-copper electrocatalysts with Pd:Cu ratios of 1:3, 1:1, and 3:1 were synthesized using a Sacrificial Support Method (SSM) in combination with the thermal reduction of metal precursors. The materials were comprehensively characterized by X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Scanning and Transmission Electron Microscopy (SEM and TEM), surface area measurements (Brunauer-Emmett-Teller, BET) and Differential Electrochemical Mass Spectroscopy (DEMS). The SSM method enables the preparation of nano-sized unsupported Pd-Cu catalysts with uniformlydistributed particles and high surface area, in the range of 40 m 2 g catalyst −1 . Their catalytic activity for the electrooxidation of several alcohols (methanol, ethanol, ethylene glycol and glycerol) was investigated in alkaline media. In situ Infrared Reflection Adsorption Spectroscopy (IRRAS) and Density Functional Theory (DFT) calculations were used in order to understand the mechanism of the various alcohols electrooxidation reactions.

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Section: Tablementioning

confidence: 99%

Highly-active Pd–Cu electrocatalysts for oxidation of ubiquitous oxygenated fuels

Serov

Asset

Padilla

et al. 2016

Applied Catalysis B: Environmental

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“…[29][30][31][32][33][34][35][36][37][38][39][40] Special emphasis can be made on fuels of the boron hydride family (e.g. sodium borohydride and ammonia borane), for which Pd-based electrocatalysts are able to outperform Pt/C.…”

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confidence: 99%

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

Zadick

Dubau

Demirci

et al. 2016

J. Electrochem. Soc.

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“…Oxophilic metals, such as Ru, Sn, have been previously shown to improve the catalytic performance of Pt and Pd catalysts for alcohol electro-oxidation by serving as adsorption sites for OH, which in turn facilitates electro-oxidation mechanism. [53][54][55][56] In conclusion, DFT calculations show that the OA oxidation on Pt most likely proceeds without the participation of surface oxidizing species. In the case of alloys, OA and its anions adsorb on Pt atoms, while Sn and Ru atom sites are most likely blocked by adsorbed hydroxyl, which forms at lower cell potentials on the alloys than on Pt surface.…”

Section: 14mentioning

confidence: 75%

Evaluation of Pt Alloys as Electrocatalysts for Oxalic Acid Oxidation: A Combined Experimental and Computational Study

Perry

Babanova

Matanović

et al. 2016

J. Electrochem. Soc.

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In this study we combined experimental approaches and density functional theory to evaluate novel platinum-based materials as electrocatalysts for oxalic acid oxidation. Several Pt alloys, PtSn (1:1), PtSn (19:1), PtRu (1:4), PtRuSn (5:4:1), and PtRhSn (3:1:4), were synthetized using sacrificial support method and tested for oxidation of oxalic acid at pH 4. It was shown that PtSn (1:1) and PtRu (1:4) have higher mass activity relative to Pt. These two materials along with Pt and one of the least active alloys, PtSn (19:1), were further analyzed for the oxidation of oxalic acid at different pHs. The results show that all samples tested followed an identical trend of decreased onset potential with increased pH and increased catalytic activity with decreased pH. Density functional theory was further utilized to gain a fundamental knowledge about the mechanism of oxalic acid oxidation on Pt, PtSn (1:1), and PtRu (1:4). The results of the calculations along with the experimentally observed dependence of generated currents on the oxalic acid concentration indicate that the mechanism of oxalic acid oxidation on Pt proceeds without the participation of surface oxidizing species, while on Pt alloys it involves their participation.

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Increased Electrochemical Oxidation Rate of Alcohols in Alkaline Media on Palladium Surfaces Electrochemically Modified by Antimony, Lead, and Tin

Cited by 44 publications

References 32 publications

Highly-active Pd–Cu electrocatalysts for oxidation of ubiquitous oxygenated fuels

Highly-active Pd–Cu electrocatalysts for oxidation of ubiquitous oxygenated fuels

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

Evaluation of Pt Alloys as Electrocatalysts for Oxalic Acid Oxidation: A Combined Experimental and Computational Study

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