The activity of ALD-prepared PtCo catalysts for ethanol oxidation in alkaline media

• ALD-prepared bimetallic catalyst is introduced for ethanol oxidation.
• With PtCo catalyst, the amount of produced CO2 increased.
• PtCoPt catalyst showed high activity and stability at elevated temperature.

Controlled bimetallic catalyst materials can be obtained using atomic layer deposition (ALD) method. In this paper, this method was applied to prepare Pt, PtCo, and PtCoPt nanoparticle catalysts on carbon support. Their activity for ethanol oxidation was studied by various electrochemical methods and the dependency of the reaction on temperature and mass transfer was evaluated. In addition, FTIR analysis was performed to confirm the reaction products. The results showed that bimetallic PtCo enhances ethanol oxidation by increasing the amount of CO2 produced; however, at elevated temperatures, the bimetallic PtCo catalyst lacked stability. Nevertheless, the ALD-prepared PtCoPt catalyst showed similar reaction mechanism as PtCo catalyst, but possess increased stability and superior performance for ethanol oxidation at elevated temperatures.

Structured PtCo nanoparticle catalysts were prepared with ALD method and their activity for ethanol oxidation was studied with electrochemical methods. PtCoPt-cycled catalyst showed significant activity and durability at elevated temperatures.Figure optionsDownload high-quality image (152 K)Download as PowerPoint slide