Publications by authors named "Heiki Erikson"

We explored two methods for synthesizing Pd nanoparticles using three different carbide-derived carbon (CDC) support materials, one of which was nitrogen-doped. These materials were studied for oxygen reduction reaction (ORR) in 0.1 M KOH solution, and the resulting CDC/Pd catalysts were characterized using TEM, XRD, and XPS.

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Article Synopsis
  • Ag-based electrocatalysts show potential for improving the efficiency of both the oxygen reduction reaction (ORR) in anion exchange membrane fuel cells (AEMFC) and the oxygen evolution reaction (OER) in regenerative fuel cells, but require enhanced performance and durability.
  • The study investigates the stability and electrochemical performance of silver catalysts supported on different types of carbon (Vulcan and mesoporous), revealing significant silver dissolution during OER, which could hinder practical applications.
  • Accelerated stress tests and advanced imaging techniques highlight that Ag supported on mesoporous carbon exhibits better stability during operational conditions compared to that on Vulcan carbon, affecting their long-term performance.
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In this work He/H plasma jet treatment was used to reduce Pd ions in the aqueous solution with simultaneous deposition of created Pd nanoparticles to support materials. Graphene oxide (GO) and nitrogen-doped graphene oxide (NrGO) were both co-reduced with the Pd ions to formulate catalyst materials. Pd catalyst was also deposited on the surface of carbon black.

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In this work we demonstrated the potential of the He+5% H+1% N plasma jet treatment for the synthesis of surfactant-free silver nanoparticles (Ag NPs) with narrow size distribution. The obtained colloidal solutions of electrostatically stabilized Ag NPs do not show any agglomeration for several months. Apart from an atomic thin oxide layer and the relatively weakly bound OH ions, the surface of Ag NPs can be considered as stabilizer-free.

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