|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Polymetallic MOF derived high entropy FeCoNiMnMo/NC nanoparticles for efficient alkaline Hydrogen Evolution Reactions
||Shiqi Wang, Feng Fang
|On-Site Speaker (Planned)
Recently, high entropy alloys (HEAs) have been considered as new-generation catalysts in water electrolysis for their unique properties. However, the synthesis of well-designed HEAs catalyst remains a challenge. Herein, we present a facile strategy to synthesis advanced FeCoNiMnMo nanoparticles anchored on nitrogen-doped carbon (NC), derived from the polymetallic metal-organic framework (MOF). The optimized FeCoNiMnMo/NC achieve boosted Hydrogen Evolution Reaction (HER) performance in alkaline conditions (1 M KOH). The obtained overpotentials at 10 mA/cm2 is 41 mV with a low Tafel slope of 56.1 mV dec−1, even outperforming commercial Pt/C. Moreover, the new design showed exceptional long-term HER stability over 36 h testing. The density functional theory (DFT) calculations revealed that the synergistic effect of chemical complexity and abundant electrocatalytic sites could lower the energy barrier of water dissociation and promote the adsorption/desorption of reactive intermediates. This work verifies the usefulness and advantage of high-entropy materials for energy conversion and storage.
||High-Entropy Alloys, Energy Conversion and Storage, Computational Materials Science & Engineering