Preparation and Characterization of Palladium Nanoparticles Supported on Nickel Hexacyanoferrate for Fuel Cell Application

Abstract

Nickel hexacyanoferrate supported palladium nanoparticles (Pd-NiHCF NPs) were synthesized and studied for oxygen reduction reactions in direct methanol fuel cell. The NiHCF support was readily synthesized by a comixing of Ni(OCOCH 3 ) 2 and equimolar K 3 [Fe(CN) 6 ] solution into DI water under rigorous stirring. After the preparation of NiHCF support, Pd NPs were loaded on NiHCF via L-ascorbic acid reduction method at 80 o C. Pd-NiHCF NPs were electrochemically active for oxygen reduction reaction in 0.1 M HClO 4 solution. X-ray absorption near edge structure analysis was conducted to measure the white line intensity of Pd-NiHCF to verify the OH adsorption. As a comparison, carbon supported Pd NPs exhibited same white line intensity. This study provides a general synthetic approach to easily load Pd NPs on porous coordination polymers such as NiHCF and can provide further light to load Pd based alloy NPs on NiHCF framework.

Palladium Nanoparticles on Assorted Nanostructured Supports: Applications for Suzuki, Heck, and Sonogashira Cross-Coupling Reactions

“…Indeed, when the sizes of the active metal NPs become smaller, their catalytic activity turns out to be higher because smaller NPs have more dangling bonds exposed to the surface because of a high surfaceto-volume ratio. 146 However, active metal NPs are easily agglomerated if they are not properly supported. To circumvent this issue, efforts have been made to produce a metal NPs@SiO 2 core−shell nanostructure.…”

Recent Advances in the Nanocatalyst-Assisted NaBH4 Reduction of Nitroaromatics in Water

“…Therefore, the deployment of supports effectively prevents their aggregation and undesirable lose, thereby enlarging the total surface area and assuring their sustained catalytic activity and reusability; the positioning of supports with a high specific surface area generally provides a promoted adhesion to reactants. 25−27…”

“…Nanosized catalysts with high specific surface area and without supports provide a ready contact with the reactants, thereby improving the catalytic activity. − However, the high surface energy of nanostructures escalates their instability and leads to aggregation, which results in the loss of catalytic activity. , An inevitable loss of nanocatalysts appears during their tedious separation from the products. Therefore, the deployment of supports effectively prevents their aggregation and undesirable lose, thereby enlarging the total surface area and assuring their sustained catalytic activity and reusability; the positioning of supports with a high specific surface area generally provides a promoted adhesion to reactants. − …”

Upgraded Valorization of Biowaste: Laser-Assisted Synthesis of Pd/Calcium Lignosulfonate Nanocomposite for Hydrogen Storage and Environmental Remediation

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