Electrochemical alcohol oxidation: a comparative study of the behavior of methanol, ethanol, propanol, and butanol on carbon-supported PtSn, PtCu, and Pt nanoparticles

Reis, Renan G. C. S. dos; Colmati, Flávio

doi:10.1007/s10008-016-3323-3

Cited by 27 publications

(16 citation statements)

References 37 publications

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“…the alcohol electrooxidation, has been extensively studied in literature and the electrooxidation activities of single alcohols have been compared under both acidic and alkaline conditions. In these studies aqueous electrolytes have been used in singlechamber electrochemical reactors with a three-electrode configuration, while the electrocatalysts are typically supported on glassy-carbon substrates and not on gas diffusion supports [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen from electrochemical reforming of C1–C3 alcohols using proton conducting membranes

Sapountzi

Tsampas

Fredriksson

et al. 2017

International Journal of Hydrogen Energy

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This study investigates the production of hydrogen from the electrochemical reforming of short-chain alcohols (methanol, ethanol, iso-propanol) and their mixtures. High surface gas diffusion Pt/C electrodes were interfaced to a Nafion polymeric membrane. The assembly separated the two chambers of an electrochemical reactor, which were filled with anolyte (alcohol+H2O or alcohol+H2SO4) and catholyte (H2SO4) aqueous solutions. The half-reactions, which take place upon polarization, are the alcohol electrooxidation and the hydrogen evolution reaction at the anode and cathode, respectively. A standard Ag/AgCl reference electrode was introduced for monitoring the individual anodic and cathodic overpotentials. Our results show that roughly 75% of the total potential losses are due to sluggish kinetics of the alcohol electrooxidation reaction. Anodic overpotential becomes larger as the number of C-atoms in the alcohol increases, while a slight dependence on the pH was observed upon changing the acidity of the anolyte solution. In the case of alcohol mixtures, it is the largest alcohol that dictates the overall cell performance.

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Section: Introductionmentioning

confidence: 99%

Hydrogen from electrochemical reforming of C1–C3 alcohols using proton conducting membranes

Sapountzi

Tsampas

Fredriksson

et al. 2017

International Journal of Hydrogen Energy

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“…Ruixue Li et al, who studied composite Pt/C-Cu 3 P catalysts of different composition, showed that the sample, which contained 50% of Cu 3 P, presented a highly enhanced catalytic performance for electrooxidation of methanol, ethanol, glycol and formic acid [27]. Renan G. C. et al [28] measured the activity of three different catalysts: PtCu/C, PtSn/C, and Pt/C in the electrooxidation of methanol, ethanol, propanol, and butanol. It was shown that the PtCu/C catalyst, which showed high activity in MOR, was less active than the PtSn/C catalyst in EOR.…”

Section: Introductionmentioning

confidence: 99%

Methanol, Ethanol, and Formic Acid Oxidation on New Platinum-Containing Catalysts

et al. 2021

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Electrooxidation of methanol, ethanol, and formic acid was studied on three platinum-containing electrocatalysts: PtCu/C, Pt/(SnO2/C), and Pt/C, Pt content being about 20 wt%. In all reactions, the integral specific activity of the catalysts, estimated from the results of cyclic voltammetry, grows in the Pt/C < Pt/(SnO2/C) < PtCu/C row. The influence of the reagent nature subjected to electrooxidation is manifested both in the difference of the absolute rate values of the corresponding reactions, decreasing in the order CH3OH > HCOOH > C2H5OH, and in the different ratio of these rates on different catalysts and at different potentials. Pt/(SnO2/C) catalyst containing SnO2 nanoparticles is the most active among the studied catalysts in methanol and formic acid electrooxidation reactions under potentiostatic conditions at the E = 0.60 V. Moreover, in formic acid electrooxidation reaction it is significantly superior to even the PtRu/C commercial catalyst. The reasons for the positive influence of Cu atoms and SnO2 nanoparticles on the catalytic activity of platinum are presumably associated with different effects: Interaction of the d-orbitals of copper and platinum atoms in bimetallic nanoparticles and implementation of the bifunctional catalysis mechanism on the adjacent platinum and tin dioxide nanoparticles.

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“…Various catalyst materials were investigated in the last years for numerous reasons, such as to reduce cost of the catalyst material, to improve catalytic activity and/or to reduce poisoning issues. One alternative besides alloying Pt with elements such as Ru [6], Sn [13], and Ni [14] is to limit the application to alkaline pH and switch to another base metal, namely Pd. This metal is also catalytically active for oxygen reduction [15] and-in alkaline regime-for alcohol oxidation [16,17].…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Electrodeposition of palladium-dotted nickel nanowire networks as a robust self-supported methanol electrooxidation catalyst

et al. 2021

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Mass activity and long-term stability are two major issues in current fuel cell catalyst designs. While supported catalysts normally suffer from poor long-term stability but show high mass activity, unsupported catalysts tend to perform better in the first point while showing deficits in the latter one. In this study, a facile synthesis route towards self-supported metallic electrocatalyst nanoarchitectures with both aspects in mind is outlined. This procedure consists of a palladium seeding step of ion track-etched polymer templates followed by a nickel electrodeposition and template dissolution. With this strategy, free-standing nickel nanowire networks which contain palladium nanoparticles only in their outer surface are obtained. These networks are tested in anodic half-cell measurements for demonstrating their capability of oxidising methanol in alkaline electrolytes. The results from the electrochemical experiments show that this new catalyst is more tolerant towards high methanol concentrations (up to $${5}\,\hbox{mol}\,\hbox{L}^{-1}$$ 5 mol L - 1 ) than a commercial carbon supported palladium nanoparticle catalyst and provides a much better long-term stability during potential cycling. Graphical Abstract

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Electrochemical alcohol oxidation: a comparative study of the behavior of methanol, ethanol, propanol, and butanol on carbon-supported PtSn, PtCu, and Pt nanoparticles

Cited by 27 publications

References 37 publications

Hydrogen from electrochemical reforming of C1–C3 alcohols using proton conducting membranes

Hydrogen from electrochemical reforming of C1–C3 alcohols using proton conducting membranes

Methanol, Ethanol, and Formic Acid Oxidation on New Platinum-Containing Catalysts

Electrodeposition of palladium-dotted nickel nanowire networks as a robust self-supported methanol electrooxidation catalyst

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