Binder-free CeO2 coated/Pd-decorated CuxO nanowires (CuxO/Pd/CeO2_NWs) based on Cu foam were synthe-sized using a four-step process: electrochemical nanoengineering for preparing Cu nanowires, galvanic replacement between Cu nanowires and H2PdCl4, soaking in cerous nitrate solution and followed thermal annealing. Due to the optimized Pd thin layer, followed coating of the moisture-blocking CeO2 overlayer, the binder-free Pd-decorated CuxO nanowires exhibit a prominently enhanced sensing properties to H2S. The CuxO/ Pd/CeO2_NWs sensor exhibits a high response of 36.69 to 50 ppm H2S with rapid r...
