Arrays of Pt@RuO2 core-shell nanotubes were prepared by electrodeposition of RuO2 on Pt nanotubes and evaluated as electrochemical microsupercapacitor electrodes. Specific capacitance of ca. 1585 and 1280 F g(RuO2)(-1), is obtained at sweep rates of 2 and 500 mV s(-1), respectively, demonstrating high utilization factor of RuO2 due to facilitated transport of protons and electrons. The specific geometric capacitance for the Pt@RuO2 core shell nanotubes electrode is 320 mF cm(-2) at 2 mV s(-1) 256 mF cm(-2) at 500 mV s(-1). (C) 2012 Elsevier B.V. All rights reserved.