The present study investigates the mass loading effect of an infiltrated La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) nanoparticles (NPs) catalyst on the area-specific polarization resistance (R-p) of a screen-printed porous LSCF cathode for solid oxide fuel cells. The results show that R-p of the LSCF-NPs decorated LSCF cathode can be substantially reduced by as much as 89.3% after a single-step impregnation of 1.5 M nitrate solution containing La:Sr:Co:Fe = 0.6:0.4:0.2:0.8 with a mass loading of 3 wt%. (C) The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. All rights reserved.