n this work, we study the preparation, structural characterization, and electrocatalytic analysis of robust Pt and Pd-containing catalyststructures for silicon-based formic acid micro fuel cells. The catalyst structures studied were prepared and incorporated into the silicon fuelcells by a post CMOS-compatible process of electrodeposition, as opposed to the more common introduction of nanoparticle-based catalystby ink painting. Robust, high surface area, catalyst structures consisting of pure Pt, pure Pd, and Pt/Pd = 1:1 were obtained. In addition,Pt/Pd catalyst structures were obtained via spontaneous deposition on the electrodeposited pure Pt structure. The catalyst structures werecharacterized electrochemically using cyclic voltammetry and chronoamperometry. All Pd-containing catalyst structures facilitate formic acidoxidation at the lower potentials and deliver higher oxidation currents compared to pure Pt catalyst structures. Fuel cells of these catalyststructures show that pure Pd catalyst structures on the anode exhibit the highest peak power density, i.e. as high as 28.0 mW/cm2. The MEMScompatible way of catalyst electrodeposition and integration presented here has yielded catalyst structures that are highly active towardsformic acid oxidation and are sufficiently robust to be compatible with post-CMOS processing.