About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
Electrochemical Properties of Electrodeposited Porous AuCu Dendrite for the Oxygen Reduction Reaction in Alkaline Solutions |
Author(s) |
Kyu Hwan Lee, Min-Yeong Kim, Sung Mook Choi |
On-Site Speaker (Planned) |
Kyu Hwan Lee |
Abstract Scope |
Porous dendrite structured AuCu alloy was formed using a hydrogen bubble template technique by electrodeposition to improve the catalytic performance of gold for oxygen reduction reaction in alkaline medium. The Au-rich surface was maximized by selectively electrochemical etching Cu on the AuCu dendrite surface well formed in a leaf shape.
The catalytic activity is mainly due to the synergistic effect of Au and Cu existing on the surface and inside of the particle. Au helps desorption of OH- and Cu contributes to the activation of O2 molecule. The porous structure of AuCu dendrite formed by the hydrogen bubble template was able to control the size of the pores according to the formation time and applied current.The results of this study suggest that the alloying of porous AuCu dendrites and selective Cu dissolution treatment induces an internal alloying effect and a large specific surface area to improve catalyst performance. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Energy Conversion and Storage, |