Ethanol Electrooxidation on Nickel Foam Arrayed with Templated PdSn; From Catalyst Fabrication to Electrooxidation Dominance Route

Kamyabi, Mohammad Ali; Jadali, Salma; Alizadeh, Taher

doi:10.1002/celc.202200914

Cited by 5 publications

(2 citation statements)

References 92 publications

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“…During electrochemical oxidation, nickel forms an active redox pair Ni(OH) 2 /NiOOH, which reduces the overpotential of the oxidation reaction . In recent years, nickel-based materials, such as NiOOH-CuO, NiFeOOH, Rh metal-modified Ni nanowires, and porous nickel electrodes − are among the most prevalent. The palladium-based nanoparticles are used as one of the most among the surface modifiers because of its high activity in alcohol oxidation to its corresponding acid products. − …”

Section: Mechanism For Nickel and Nickel-based Catalysts In Alkaline ...mentioning

confidence: 99%

Review and Perspective of Nickel and Its Derived Catalysts for Different Electrochemical Synthesis Reactions in Alkaline Media for Hydrogen Production

Samanta,

Shekhawat,

Sahu

et al. 2023

Energy Fuels

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Hydrogen (H 2 ) is a promising alternative energy source, but its current production method through steam reforming is energy intensive and polluting. Water electrolysis, specifically the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), offers a cleaner option. Although HER is the favorable process, OER needs a larger overpotential, thereby hindering practical implementation. The use of expensive noble metal-based catalysts limits the application. The levelized cost of hydrogen can be lowered by replacing the anodic reaction with several innovative strategies. Alternative oxidation reactions have emerged as some of the most noteworthy new strategies. A critical analysis of electrochemical synthesis reactions (ESR) combining anodic chemical synthesis and cathodic hydrogen evolution is presented here for replacing the traditional OER with organic molecule oxidation. This review aims to explore nickel and nickel-based catalysts for different ESR reactions, such as alcohol, aldehydes, amines, and biomass-derived compounds, for energyefficient and cost-effective electrocatalytic hydrogen production. In this critical review, we present a clear picture of the challenges and bottlenecks associated with electrochemical synthesis reactions as a method of industrial hydrogen production needs. Finally, a perspective and challenges for future development of the hybrid water electrolysis techniques are demonstrated.

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Section: Mechanism For Nickel and Nickel-based Catalysts In Alkaline ...mentioning

confidence: 99%

Review and Perspective of Nickel and Its Derived Catalysts for Different Electrochemical Synthesis Reactions in Alkaline Media for Hydrogen Production

Samanta,

Shekhawat,

Sahu

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…This is because during the oxidation process, nickel creates an electrochemically active redox pair Ni(OH) 2 /NiOOH, for which the oxidation reaction has a reduced overpotential [ 17 ]. Currently, the main trends in this field are the synthesis of nickel-based alloy materials, such as NiOOH-CuO oxide nanostructures [ 18 ] NiFeOOH [ 19 ], metal-modified Ni nanowires precious metals such as Rh [ 20 ] and porous nickel electrodes [ 21 , 22 , 23 , 24 ]. One of the most commonly used surface modifiers are palladium-based nanoparticles due to their highest activity in the oxidation of ethanol to acetate [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Performance of Ethanol Oxidation on Ni and Ni/Pd Surface-Decorated Porous Structures Obtained by Molten Salts Deposition/Dissolution of Al-Ni Alloys

Kutyła

Nakajima

Fukumoto

et al. 2023

IJMS

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Ni coatings with high catalytic efficiency were synthesised in this work, obtained by increasing the active surface and modifying Pd as a noble metal. Porous Ni foam electrodes were obtained by electrodeposition of Al on a nickel substrate. Deposition of Al was carried out with potential −1.9 V for a time of 60 min in NaCl–KCl-3.5 mol%AlF3 molten salt mixture at 900 °C, which is connected with the formation of the Al-Ni phase in the solid state. Dissolution of Al and Al-Ni phases was performed by application of the potential −0.5 V, which provided the porous layer formation. The obtained porous material was compared to flat Ni plates in terms of electrocatalytic properties for ethanol oxidation in alkaline solutions. Cyclic voltammetry measurements in the non-Faradaic region revealed the improvement in morphology development for Ni foams, with an active surface area 5.5-times more developed than flat Ni electrodes. The catalytic activity was improved by the galvanic displacement process of Pd(II) ions from dilute chloride solutions (1 mM) at different times. In cyclic voltammetry scans, the highest catalytic activity was registered for porous Ni/Pd decorated at 60 min, where the maximum oxidation peak for 1 M ethanol achieved +393 mA cm−2 compared to the porous unmodified Ni electrode at +152 mA cm−2 and flat Ni at +55 mA cm−2. Chronoamperometric measurements in ethanol oxidation showed that porous electrodes were characterised by higher catalytic activity than flat electrodes. In addition, applying a thin layer of precious metal on the surface of nickel increased the recorded anode current density associated with the electrochemical oxidation process. The highest activity was recorded for porous coatings after modification in a solution containing palladium ions, obtaining a current density value of about 55 mA cm−2, and for a flat unmodified electrode, only 5 mA cm−2 after 1800 s.

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Direct Alcohol Fuel Cells: A Comparative Review of Acidic and Alkaline Systems

Berretti,

Osmieri,

Baglio

et al. 2023

Electrochem. Energy Rev.

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In the last 20 years, direct alcohol fuel cells (DAFCs) have been the subject of tremendous research efforts for the potential application as on-demand power sources. Two leading technologies respectively based on proton exchange membranes (PEMs) and anion exchange membranes (AEMs) have emerged: the first one operating in an acidic environment and conducting protons; the second one operating in alkaline electrolytes and conducting hydroxyl ions. In this review, we present an analysis of the state-of-the-art acidic and alkaline DAFCs fed with methanol and ethanol with the purpose to support a comparative analysis of acidic and alkaline systems, which is missing in the current literature. A special focus is placed on the effect of the reaction stoichiometry in acidic and alkaline systems. Particularly, we point out that, in alkaline systems, OH− participates stoichiometrically to reactions, and that alcohol oxidation products are anions. This aspect must be considered when designing the fuel and when making an energy evaluation from a whole system perspective. Graphical Abstract

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Ethanol Electrooxidation on Nickel Foam Arrayed with Templated PdSn; From Catalyst Fabrication to Electrooxidation Dominance Route

Cited by 5 publications

References 92 publications

Review and Perspective of Nickel and Its Derived Catalysts for Different Electrochemical Synthesis Reactions in Alkaline Media for Hydrogen Production

Review and Perspective of Nickel and Its Derived Catalysts for Different Electrochemical Synthesis Reactions in Alkaline Media for Hydrogen Production

Electrocatalytic Performance of Ethanol Oxidation on Ni and Ni/Pd Surface-Decorated Porous Structures Obtained by Molten Salts Deposition/Dissolution of Al-Ni Alloys

Direct Alcohol Fuel Cells: A Comparative Review of Acidic and Alkaline Systems

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