About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
8th World Congress on Integrated Computational Materials Engineering (ICME 2025)
|
Presentation Title |
Theory Guided Design of MoO3/NiMoO4 Heterostructures Hybridized Active Pt Co-Catalyst for Efficient Water Splitting |
Author(s) |
Nikhil Komalla, Nelson Y Dzade |
On-Site Speaker (Planned) |
Nikhil Komalla |
Abstract Scope |
An excellent bifunctional catalyst based on vertically aligned MoO3/NiMoO4 heterostructured nanorod arrays hybridized with ultrafine Pt nanoparticles for hydrogen and oxygen evolution reactions (HER and OER) in industrial-grade water splitting was developed. Density functional theory (DFT) calculations revealed the formation of a metallic heterostructure with enhanced charge transfer capabilities. Additionally, strong chemical coupling between MoO3/NiMoO4 and Pt synergistically improved charge transfer and optimized Gibbs free energies of intermediate species, accelerating reaction kinetics. The synthesized Pt-MoO3/NiMoO4 catalyst demonstrated superior performance compared to conventional noble-metal catalysts like Pt/C and RuO2 at industrial current densities (≥1000 mA·cm−2). It achieved low overpotentials of 38.3 mV for HER and 267.6 mV for OER at 10 mA·cm−2. When used as both cathode and anode, it exhibited exceptional performance with a cell voltage of 1.55 V and durability for over 50 hours under continuous operation. Published in Journal of Colloid and Interface Science, 670, 12−27 (2024). |
Proceedings Inclusion? |
Undecided |