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Substitutional Phosphorus Doping Stimulates Strong Metal-Support Interactions for Anion Exchange Membrane Based Alkaline Seawater Electrolysis
- Source :
- Nano Energy; 20240101, Issue: Preprints
- Publication Year :
- 2024
-
Abstract
- The development of electrocatalysts with high catalytic activity and resistant to chlorine has become crucial for the large-scale implementation of seawater electrolysis. Here, the strong metal support interaction (SMSI) between Pt and NiMoO4is enhanced by substitutional P atom-doping (P-Pt/NiMoO4@NF) to optimize the metal surrounding environment, realizing the efficient and anticorrosive seawater electrolysis. Density functional theory (DFT) reveals that substitutional P atom-doping can adjust the electronic structure to optimize the hydrogen adsorption free energy (ΔGH*) and decrease the adsorption energy of Cl-for the HER process. Benefiting from the SMSI caused by substitutional P atom-doping, the prepared P-Pt/NiMoO4@NF catalyst achieves a current density of 1.0Acm-2at an ultra-low overpotential of only 80mV, surpassing the most reported Pt-based electrocatalysts. More importantly, in the anion exchange membrane (AEM) electrolyzer, the catalyst used as the cathode can drive 500mAcm-2under industrial conditions with only 1.75V, while running steadily for 120h, and with high efficiency and low price of H2per gallon gasoline equivalent (GGE).
Details
- Language :
- English
- ISSN :
- 22112855
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Nano Energy
- Publication Type :
- Periodical
- Accession number :
- ejs66246944
- Full Text :
- https://doi.org/10.1016/j.nanoen.2024.109698