Self-supported PdNi dendrite on Ni foam for improving monohydric alcohol and polyhydric alcohols electrooxidation

Zhang, Ning; Wang, Jing; Zhang, Wen; Zhao, Yingxiu; Dong, Zemeng; Wu, Zexing; Xu, Guangrui; Wang, Lei

doi:10.1016/j.fuel.2022.125083

Cited by 10 publications

(4 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two main themes are the bifunctional mechanism and electronic effect. For the bifunctional mechanism, the addition of an oxophilic metal such as Ni to a noble metal catalyst enhances the catalytic activity by providing an increased amount of proximal hydroxide species adjacent to the GEOR active sites. ,, The enhanced activity is then a result of either the increased hydroxide species providing a more oxidative environment, participating in the GEOR or aiding the oxidative removal of inhibiting CO ad intermediates. For the electronic effect, the addition of non-noble transition metals to the lattice of noble metals such as Pt and Pd decreases the binding energy for inhibiting species such as CO and OH, and it can increase the number of available surface electrons and lower glycerol adsorption energy; the result being easier desorption of intermediates and, therefore, increased active sites during the GEOR as well as less C–C bond cleavage.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Bimetallic PdNi Nanoparticles: Enhancing Glycerol Electrooxidation While Preserving C3 Product Selectivity

White,

Terekhina,

Campos dos Santos

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Electrochemical conversion of glycerol offers a promising route to synthesize value-added glycerol oxidation products (GOPs) from an abundant biomass-based resource. While noble metals provide a low overpotential for the glycerol electrooxidation reaction (GEOR) and high selectivity toward three-carbon (C3) GOPs, their efficiency and cost can be improved by incorporating non-noble metals. Here, we introduce an effective strategy to enhance the performance of Pd nanoparticles for the GEOR by alloying them with Ni. The resulting PdNi nanoparticles show a significant increase in both specific activity (by almost 60%) and mass activity (by almost 35%) during the GEOR at 40 °C. Additionally, they exhibit higher resistance to deactivation compared to pure Pd. Analysis of the GOPs reveals that the addition of Ni into Pd does not compromise the selectivity, with glycerate remaining at around 60% of the product fraction and the other major product being lactate at around 30%. Density functional theory calculations confirm the reaction pathways and the basis for the higher activity of PdNi. This study demonstrates a significant increase in the GEOR catalytic performance while maintaining the selectivity for C3 GOPs, using a more cost-effective nanocatalyst.

show abstract

Section: Resultsmentioning

confidence: 99%

Synergistic Bimetallic PdNi Nanoparticles: Enhancing Glycerol Electrooxidation While Preserving C3 Product Selectivity

White,

Terekhina,

Campos dos Santos

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…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

View full text Add to dashboard Cite

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.

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

View full text Add to dashboard Cite

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.

show abstract

Self-supported PdNi dendrite on Ni foam for improving monohydric alcohol and polyhydric alcohols electrooxidation

Cited by 10 publications

References 58 publications

Synergistic Bimetallic PdNi Nanoparticles: Enhancing Glycerol Electrooxidation While Preserving C3 Product Selectivity

Synergistic Bimetallic PdNi Nanoparticles: Enhancing Glycerol Electrooxidation While Preserving C3 Product Selectivity

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

Contact Info

Product

Resources

About