Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method in alkaline solution

Electrochemical behavior of electrodeposited Pd and PdNi coatings for the ethanol oxidation reaction in alkaline solution

“…The electro-catalytic activity of the carbon nanofibers (CNF) supported Pd-Ni nanoparticles prepared by chemical reduction with NaBH 4 was examined for EOR show that the onset potential was 200 mV lower and the peak current density 4 times higher compared to that for Pd/C as a result of the uniform distribution of metal nanoparticles on the CNF support while the significant increase in reaction kinetics was achieve by raising the temperature to 60 °C [7]. Negatively shifted onset potential and doubled peak current density in potentiodynamic measurements for core-shell Ni-Pd/C compared to Pd/C was found [18], while high activity and excellent stability during continuously cycling were found for Pd supported on Ni foam [19,20].…”

“…Nevertheless, among the various methods, electrodeposition is recognized as a simple and versatile method to prepare bimetallic surfaces. Several methods for PdNi alloy electrodeposition can be find in the literature such as: doublepotential step electrodeposition technique from the solution containing NiSO 4 , H 2 PdCl 4 and Na 2 SO 4 [23]; cathodic deposition from the solution containing PdCl 2 , H 2 SO 4 , NH 4 Cl and NiCl 2 using hydrogen dynamic bubble template producing three-dimensional hierarchical pores of intercomnected dendrite walls [ 24 ]; electrodeposition in the presence of complexing agent, ethylenediamine [25,26]; electrodeposition from a ionic liquid as electrolyte [16,27]; physical vapour deposition which was used to obtain palladium-modified nickel foam material [19].…”

Palladium-Based Nanomaterials: Synthesis and Electrochemical Applications

“…Direct alcohol fuel cells (DAFCs) have garnered much attention for their use as power sources for portable applications, such as electronic devices and electric cars. Alcohols, such as methanol, ,,,,,− ethanol, ,,,,,,,− ethylene glycol, ,,, and glycerol, , are appealing as a result of their high energy density, ease of transportation, and storage, in contrast to H 2 -fueled polymer electrolyte membrane fuel cells (PEMFCs). For decades, Pt-based electrodes have been dominant for their use as electrocatalysts in the oxidation of alcohols.…”

“…Various other Pd-based alloyed materials, such as PdCu, PdAgTe, PdSn, and PdNi, − ,, have been investigated over the past decade. Of these, PdNi showed promising electrocatalytic activity, as well as exhibited increased corrosion resistance. , Shen et al synthesized carbon-supported PdNi catalysts and compared their performance to that of Pd/C toward EOR.…”

Bifunctional Electrocatalysis on Pd‐Ni Core–Shell Nanoparticles for Hydrogen Oxidation Reaction in Alkaline Medium

“…Recent advances in the understanding of PGM surfaces suggest that an improvement in HOR activity can be achieved by the addition of foreign metal atoms, primarily transition metals, either segregated on the surface of PGMs or in the form of bimetallic alloys . In addition, alkaline conditions are much less aggressive for most of the transition metals, allowing the use of non‐PGM catalysts alone or in combination with PGMs . Consequently, the alloying or partial coating of low‐cost transition metals with a small amount of PGMs should pave the way for high activity, low cost and durable HOR electrocatalysts for AEMFCs.…”