About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage 2022
|
Presentation Title |
Ag@AgCl Core/shell Catalysts with Bumpy Surface to Enhance
Oxygen Reduction Reaction
|
Author(s) |
Suyeon Choi, Changsoo Lee, Jahyun Koo, Hyuck Mo Lee |
On-Site Speaker (Planned) |
Suyeon Choi |
Abstract Scope |
The commercialization of fuel cells is hindered by the high cost and poor stability of Pt catalysts. As an alternative material to Pt, Ag is attracting a lot of attention due to its low cost, long-term stability, and excellent electrical conductivity. Here, we additionally used Cl to enhance the oxygen reduction reaction (ORR) activity of Ag via ligand effect between Ag and Cl and designed Ag@AgCl core/shell nanowires (NWs) decorated with AgCl nanoparticles. Ag NWs core makes the high electrical conductivity of Ag maintained, and decorated AgCl particles increase the surface area, resolving the O2 mass transport issue in the high overpotential region. As a result, the ORR activity of AgCl-Ag@AgCl NWs is enhanced noticeably compared with Ag NWs, and the stability is confirmed through accelerated durability tests (ADTs) and morphology comparisons between before and after ADTs using scanning transmission electron microscopy and energy dispersive X-ray spectroscopy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Nanotechnology, Sustainability |