Synthesis and Evaluation of High Durable Electrocatalysts Using Oxide Supports for Polymer Electrolyte Fuel Cells (Second Report)

Abstract

Toward the widespread use of polymer electrolyte fuel cells to the electric vehicles, the degradation of carbon support at the cathode should be resolved. The cell performance using high durable Pt/Nb-SnO₂ cathode catalyst layer was higher than that using Pt/GCB by decreasing ionomer content. The increase of primary pore volume in Pt/Nb-SnO₂ catalyst layers mitigated the overpotential originated from the gas diffusion. The increase of secondary pore volume in the catalyst layers also prevented the water flooding.