Femtosecond-Laser Synthesized PtBi Nanoalloys for Efficient Methanol Oxidation in Hybrid Electrolysis.

ABSTRACT: Hydrogen production through electrochemical seawater splitting is challenged by the energy-intensive oxygen evolution reaction and the competing chlorine evolution reaction. To overcome these obstacles, ligand-free platinum bismuth (PtBi) alloy nanoparticles (≈2 nm) are synthesized via femtosecond laser liquid ablation under nonequilibrium conditions, yielding metastable structures with tunable elemental compositions populated with defects. The Pt₄Bi/C catalyst excels in alkaline methanol oxidation reaction (MOR), delivering a mass activity of 17.7 A mg^-1 _pt (11.5 times higher than 20% Pt/C) and a specific activity of 54.9 mA cm^-2. In-situ Fourier transform infrared spectroscopy and ambient pressure X-ray photoelectron spectroscopy reveal a CO-fr

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12622524 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature