Surface‐Roughened Pt‐Decorated Pd Nanoparticles as Efficient Electrocatalysts for Direct Alcohol Fuel Cells

Prabu, N.; Jeyakumar, D.; Maduraiveeran, Govindhan; Sasidharan, Manickam

doi:10.1002/ejic.201800600

Cited by 3 publications

(1 citation statement)

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“…Palladium bimetallic electrocatalysts show excellent activity in alkaline electrolytes, which are known to increase alcohol oxidation kinetics by 1.5x on average compared to acidic electrolytes. 33,43,44 Alkaline electrolytes also enable the use of non-noble metal catalysts, which suffer considerable dissolution in acidic electrolytes. 45 The introduction of a secondary metal to palladium, in addition to using alkaline electrolytes, significantly similarly increases the electrocatalytic properties of platinum, and specific catalysts have even shown similar activity to their platinum bimetallic counterparts.…”

Section: Fuel Cellsmentioning

confidence: 99%

Bimetallic Gold-Palladium Nanoparticles: Applications in Methanol and Ethanol Oxidation Reactions

Parkash

Islam²,

Pirzada³

et al. 2022

ECS J. Solid State Sci. Technol.

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The direct methanol fuel cell (DMFC) is a fuel cell technology capable of generating energy through the electrochemical oxidation of methanol. The methanol oxidation reaction (MOR), which occurs at the anode, is of interest for producing renewable energy. This process relies on precious metal catalysts to efficiently produce energy, namely nanoscale Pt-Ru. Current fuel cell technology is, therefore, expensive, and unsuitable for large-scale implementation. Palladium can act as an electrocatalyst for the process, similar to platinum. However, its monometallic form suffers from high overpotentials and significant poisoning by carbon monoxide (CO) generated in situ. Previous research has shown improved activity of palladium in alkaline electrolytes, which, while unsuitable for platinum, are known to enhance alcohol oxidation reaction kinetics through preferred oxidation of methanol. The addition of a secondary metal assists in both modulations of palladium-reactant binding strengths and co-catalyzed oxidation of CO when exposed to the surface. This article reviews the literature on DMFC and anode electrocatalysts. The current platinum catalysts and foundation knowledge of the mechanism of platinum are compared to current palladium catalysts. The requirements for new nanoscale palladium catalysts and background on their synthesis are outlined.

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