Abstract
AbstractIn this work, we prepared a polymer gel based on poly (acrylic acid) partial potassium salt (PAA‐K) for its use as an electrolyte in the ethanol electro‐oxidation. In addition, we synthesized PdxAgy materials by varying the metallic ratio through differential pulse amperometry (DPA). These materials showed particle sizes ranging from 40 to 60 nm, and their compositions were Pd75Ag25, Pd60Ag40, and Pd50Ag50, as determined by X‐ray fluorescence. Electrocatalytic evaluation of ethanol oxidation in aqueous electrolyte at 1.0 M ethanol resulted in the following activity trend: Pd60Ag40>Pd50Ag50>Pd75Ag25≥Pd, where Pd60Ag40 showed the highest current density with 102.6 mA mg−1 Pd. In the PAA‐K gel electrolyte, Pd60Ag40 also achieved the highest peak current density (7.5 mA mg−1 Pd). Additionally, Pd60Ag40 maintained almost the same oxidation potential (−0.41 V vs. NHE) in aqueous and gel electrolytes, but the current density decreased 13.7‐fold owing to the high viscosity of PAA‐K electrolyte (∼400 cP).
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