Release time:2023-10-19 Hits:
- Key Words:OXYGEN EVOLUTION; HYDROGEN; ELECTROCATALYSTS; NANOPARTICLES; STABILITY; COP
- Abstract:Under the condition of industrial ampere-level current density seawater splitting, the electrocatalyst for hydrogen production needs two characteristics of superb activity and long-term durability. In this work, P va-cancies enriched CoxPv@NC with unique multilevel structure was synthesized and applied to ampere-level current density for seawater splitting process. The coupled CoxPv@NC seawater electrolyzer requires low volt-ages of 1.88 and 1.74 V to provide 1.0 A cm-2 in 1.0 M KOH seawater solution at room temperature and 6.0 M KOH seawater solution at 60 degrees C, respectively, exhibiting no obvious decline over 100 h test at 1.0 A cm-2. In-situ Raman spectra and theoretical calculations uncover that the outstanding catalytic performance originates from the P vacancy induced optimization of intermediate adsorption energy for HER and rapid reconstruction of active species for OER. The electrocatalyst devised in this work supplies an effective way to settle the insufficient of ampere-level current-density-tolerant bifunctional electrocatalysts in industrial seawater splitting.
- Volume:109
- Issue:
- Translation or Not:no
