Comparative electrooxidation of C 1 –C 4 alcohols on Pd|CC nanoparticle anode catalyst in alkaline medium

Habibi, Esmaeil; Bidad, Elahe; Feizbakhsh, Alireza; Fazli, Maryam

doi:10.1016/j.ijhydene.2014.09.049

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…A similar finding was previously reported regarding the activity of PdAgNi towards formic acid oxidation [ 39 ]. The lower oxidation onset potentials and higher forward current peak are advantageous for the three samples in this work compared to many other previously published catalysts [ 58 , 65 , 66 , 67 ]. Table 4 compares the EOR onset oxidation current density and current peak obtained with this work catalysts and previously published ones.…”

Section: Discussionmentioning

confidence: 93%

Synthesis and Characterization of PdAgNi/C Trimetallic Nanoparticles for Ethanol Electrooxidation

Elsheikh

McGregor

2021

Nanomaterials

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The direct use of ethanol in fuel cells presents unprecedented economic, technical, and environmental opportunities in energy conversion. However, complex challenges need to be resolved. For instance, ethanol oxidation reaction (EOR) requires breaking the rigid C–C bond and results in the generation of poisoning carbonaceous species. Therefore, new designs of the catalyst electrode are necessary. In this work, two trimetallic PdxAgyNiz/C samples are prepared using a facile borohydride reduction route. The catalysts are characterized by X-ray diffraction (XRD), Energy-Dispersive X-ray spectroscopy (EDX), X-ray photoelectron Spectroscopy (XPS), and Transmission Electron Microscopy (TEM) and evaluated for EOR through cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The XRD patterns have shown a weak alloying potential between Pd, and Ag prepared through co-reduction technique. The catalysts prepared have generally shown enhanced performance compared to previously reported ones, suggesting that the applied synthesis may be suitable for catalyst mass production. Moreover, the addition of Ag and Ni has improved the Pd physiochemical properties and electrocatalytic performance towards EOR in addition to reducing cell fabrication costs. In addition to containing less Pd, The PdAgNi/C is the higher performing of the two trimetallic samples presenting a 2.7 A/mgPd oxidation current peak. The Pd4Ag2Ni1/C is higher performing in terms of its steady-state current density and electrochemical active surface area.

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Section: Discussionmentioning

confidence: 93%

Synthesis and Characterization of PdAgNi/C Trimetallic Nanoparticles for Ethanol Electrooxidation

Elsheikh

McGregor

2021

Nanomaterials

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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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“…The observed Cu 2 O peaks in the XRD pattern assures the oxidation of the Cu surface by air in accordance with the results obtained from the EDS measurements. Moreover, the average crystal sizes of the electrodeposited Cu and Cu 2 O were calculated using Scherrer's equation 55 and are summarized in Table II. The crystallographic orientation index (N) for each film is calculated according to Eq.…”

Section: Resultsmentioning

confidence: 99%

3D Macroporous Catalysts: Impact of Additives on the Morphology and Performance of Cu/Cu₂O Foam Prepared by Dynamic Hydrogen Bubble Template Towards Glycerol Electro-Oxidation

Rizk

El-Moghny

El‐Deab

2020

J. Electrochem. Soc.

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Macroporous Cu/Cu 2 O foam is electrochemically prepared using the dynamic hydrogen bubble template technique (DHBT) where a highly porous honeycomb-like Cu/Cu 2 O film is obtained. Various additives such as (NH 4 ) 2 SO 4 , KBr, and KCl are added into the deposition bath of Cu to study their effect on the formation of Cu/Cu 2 O macroporous foam and their impact towards glycerol electro-oxidation reaction (GOR). The morphological structure, surface pore diameter, and electro-active surface area are tuned. The electrochemical activity of the foams is improved towards glycerol electro-oxidation reaction in alkaline medium. The macroporous film prepared in the presence of KBr shows the best catalytic performance due to its high electro-active surface area and surface pore diameter. Material and electrochemical characterization (e.g. SEM, XRD, and CV) techniques were used to relate the observed enhancement to the morphology, composition, and structure of the as synthesized Cu/Cu 2 O foams.

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Comparative electrooxidation of C 1 –C 4 alcohols on Pd|CC nanoparticle anode catalyst in alkaline medium

Cited by 7 publications

References 32 publications

Synthesis and Characterization of PdAgNi/C Trimetallic Nanoparticles for Ethanol Electrooxidation

Synthesis and Characterization of PdAgNi/C Trimetallic Nanoparticles for Ethanol Electrooxidation

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

3D Macroporous Catalysts: Impact of Additives on the Morphology and Performance of Cu/Cu₂O Foam Prepared by Dynamic Hydrogen Bubble Template Towards Glycerol Electro-Oxidation

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Comparative electrooxidation of C 1 –C 4 alcohols on Pd|CC nanoparticle anode catalyst in alkaline medium

Cited by 7 publications

References 32 publications

Synthesis and Characterization of PdAgNi/C Trimetallic Nanoparticles for Ethanol Electrooxidation

Synthesis and Characterization of PdAgNi/C Trimetallic Nanoparticles for Ethanol Electrooxidation

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

3D Macroporous Catalysts: Impact of Additives on the Morphology and Performance of Cu/Cu2O Foam Prepared by Dynamic Hydrogen Bubble Template Towards Glycerol Electro-Oxidation

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3D Macroporous Catalysts: Impact of Additives on the Morphology and Performance of Cu/Cu₂O Foam Prepared by Dynamic Hydrogen Bubble Template Towards Glycerol Electro-Oxidation