Fuel electrodes on proton-conducting ceramics, such as BaZr0.9-xCexY0.1O3-delta (BZCY), must be stable at high temperatures in reducing and hydrocarbon-containing gases. This work investigated thin Cu-based electrodes (similar to 1 mu m) deposited by electroless plating on tubular substrates composed of a dense BZCY film (similar to 25 mu m) on a porous Ni-BZCY support. Ru, Pd, and Cu were studied as activation catalysts and the performance of those electrodes (Ru/Cu, Pd/Cu, and Cu/Cu) was evaluated during the galvanic hydrogen pumping at 700 degrees C in reducing and hydrocarbon-containing feeds. The hydrogen flux was measured with a stoichiometric titration experiment and the highest flux (3.1 NmL.cm(-2).min(-1)) was obtained with Ru/Cu at 400 mA.cm(-2). The metric to compare the electrodes was the power required to pump 1 NmL H-2.min(-1) at 40 mA.cm(-2). Those numbers for Ru/Cu, Pd/Cu, and Cu/Cu electrodes in a 10% H-2 in Ar feed were 34, 22, and 268 mW/(NmL H-2.min(-1)). Due to the order of magnitude higher power requirement for the pure Cu electrode, only the Ru/Cu and Pd/Cu electrodes were investigated further and their performance was found to deteriorate in the presence of a predominantly methane-feed. The post mortem microstructural analysis showed that the Ru/Cu and Pd/Cu electrodes did reorganize significantly under bias and coke formation was only observed on the BZCY membrane.