About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanocomposite Materials: Innovations in Design, Fabrication, and Applications
|
| Presentation Title |
High-efficiency hydrogen evolution reaction from nickel-copper dual-atom catalysts on carbon nanofibers synthesized using thermal delamination |
| Author(s) |
Gilbert Daniel Nessim |
| On-Site Speaker (Planned) |
Gilbert Daniel Nessim |
| Abstract Scope |
Using a one-step chemical vapor deposition (CVD), we synthesized binder-free, self-standing nickel and copper dual-atom catalysts anchored on a carbon nanofiber mat (NiCu-DACs@CNFs). The synthesis relies on the temperature-controlled thermal delamination of weakly adhered multilayer mixed-metal thin films from a substrate, coupled with concurrent gas-phase reactions using C2H4/H2 precursors to grow a high-surface-area carbon matrix. Samples exhibited exceptional electrocatalytic hydrogen evolution reaction (HER) performance: low onset potential of 44 mV and current density of -100 mAcm-2 at an overpotential of just -164 mV. They exhibited outstanding long-term durability, retaining 95% of its current density over 72 h of constant electrolysis at an applied current density of -50 mAcm-2. We will discuss: (1) thermal detachment of weak-adhered thin metal films; (2) nucleation, growth, (3) de-wetting of nickel on the CNFs to form DACs, (4) multiple gas-solid phase reactions that occur in the CVD reactor, and (5) various low adhesion strategies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Nanotechnology, Phase Transformations |