Improved Catalyst Composition and Electrode for Low-Temperature Direct Ammonia Fuel Cells

Abstract

This study investigates the ammonia oxidation reaction (AOR) performance of Pt-based catalysts using half-and single-cell configureations. To optimize Ir use, a PtIr/VC catalyst with a modified Pt:Ir ratio was synthesized. To close the half-/single-cell gap, single-cell DAFC operating conditions (membrane type, tmeperature, conditioning) were optimized. Higher temperatures and piperidinium-functionalized memebranes improved performance, offerinf insights for rational catalyst and operating condition desigh to enhance DAFC efficiency and durability.