| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Design of Ordering in Double Transition Metal Mo2Nb2C3Tx MXenes |
| Author(s) |
Brian Wyatt, Anupma Thakur, Kat Nykiel, Zachary Hood, Shiba Adhikari, Krista Pulley, Wyatt Highland, Alejandro Strachan, Babak Anasori |
| On-Site Speaker (Planned) |
Brian Wyatt |
| Abstract Scope |
The application of MXenes in high-demand applications such as energy storage and conversion require advancements in the synthesis and control of MXene composition in every atomic layer. In this study, we illustrate the synthesis of an ordered DTM Mo2+αNb2-αC3Tx MXene (0 ≤ α ≤ 0.3). We demonstrate that Mo and Nb preferentially occupy the outer (M') and inner (M") layers, respectively, using x-ray diffraction, Rietveld refinement, electron microscopy, and density functional theory methods. With these methods, we exhibit the effect of modifying M' and inner M" occupancies of Mo and Nb in Mo2+αNb2-αC3Tx by altering α in the precursor MAX phase. We also establish the effect of modifying outer M' and inner M" occupancies in the Mo2+αNb2-αC3Tx hydrogen evolution reaction behavior to gain an overpotential as low as 183 mV at 10 mA/cm2. This atomistic control of an ordered DTM MXene adds further control of MXenes for energy applications. |