About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Electronic Structure Engineering of Mo-Based Carbonitride MXenes for Efficient Water Splitting |
| Author(s) |
Poulomi Nandi, Anupma Thakur, Babak Anasori |
| On-Site Speaker (Planned) |
Poulomi Nandi |
| Abstract Scope |
Carbonitride MXenes have recently attracted substantial interest as emerging electrocatalysts owing to their metal-like electrical conductivity, tunable surface chemistry and abundance of catalytically active sites. In this work, we experimentally investigate molybdenum-based carbonitride MXenes (Mn+1XnCxNyTz) as bifunctional catalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in aqueous electrolytes. We designed and synthesized a series of Mo-based carbonitride MAX phases and converted them into MXenes via selective etching and delamination. Structural and compositional characterization was performed using XRD, SEM/TEM, Raman spectroscopy, and XPS. Electrocatalytic performance was evaluated using linear sweep voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy in acidic and alkaline media. Compared to carbide MXenes, carbonitride MXenes exhibit enhanced HER and OER activity, lower overpotentials, improved charge-transfer kinetics, and excellent long-term electrochemical stability due to nitrogen-induced electronic structure modulation. |