A novel platinum modified barium zirconate-based electrolyte for enhanced solid oxide fuel cell performance.

• A stable electrolyte for proton-conducting solid oxide fuel cells (H-SOFC). • A viable and efficient technical approach involving Pt catalysis. • Effectively enhanced electrochemical performance. • Innovations in SOFC electrolyte processing. Pt modified BaZr 0.76 Y 0.2 Ni 0.04 O 3 (BZYN) is fabricated and characterized as a stable electrolyte for proton-conducting solid oxide fuel cell (H-SOFC). The utilization of X-ray diffraction method (XRD) and transmission electron microscopy (TEM) enables the identification of the presence of platinum (Pt) in both the crystal lattice sites and the grain interface. This occurrence contributes to a reduction in grain boundary resistance. Consequently, this phenomenon improves the conductivity of the electrolyte. The electrochemical performance of the single cell with Pt-modified BZY electrolyte is improved by the reduction of ohmic resistance and enhancement of ion migration. This signifies a noteworthy advancement in the creation of more efficient and durable proton-conducting SOFCs. [ABSTRACT FROM AUTHOR]