Revealing the Stabilization Mechanism of Electron-Enriched PtNiCo Catalysts in Practical Direct Methanol Fuel Cells.

ABSTRACT: The rational design of Pt-based alloy catalysts with dual resistance to CO poisoning and metal leaching, enabled by interfacial electronic modulation, remains a critical challenge for practical direct methanol fuel cells (DMFCs). Here, we report a highly stable catalyst comprising electron-enriched TiN-meditated PtNiCo (denoted as e-PtNiCo) for DMFCs, demonstrating stabilization mechanisms rooted in enhanced Pt-CO antibonding interactions and strengthened Pt-Co/Ni chemical bonds. The e-PtNiCo catalyst exhibits a voltage decay of 9.6% at 100 mA cm^-2 over 50 h under practical DMFC operating conditionsa 4-fold improvement compared with the benchmarked PtNiCo (37.7%). Density functional theory calculations and post-mortem elemental analysis reveal that the developed catalysts posse

SUBMITTER: Chen M 

PROVIDER: S-EPMC12550620 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature