| 초록 |
Platinum (Pt) nanoparticles have been considered as state-of-the-art electrocatalysts to fabricate catalyst layer-coated electrodes for driving the hydrogen evolution reaction (HER). However, the process of making catalyst-coated electrodes using conventional Pt catalysts is rather complicated, and reducing the use of Pt catalysts for HER due to the high cost of Pt catalysts is still an ongoing effort. Thus, it is important to develop a simple and novel catalyst electrode fabrication process. In this work, we propose a simple and novel synthetic method to prepare Pt-WOx hybrid nanostructures using a metal-dissolution based electrodeposition technique without expensive metal salts. The Pt-WOx hybrid nanoflake structures were synthesized using dissolution and electrochemical re-deposition of solid metal sources such as Pt and tungsten disulfide (WS2). The hybrid nanostructures demonstrate excellent catalytic HER performance with approximately 17 times higher Pt mass activity and 7.4 times turnover frequency values than those of commercial Pt catalyst. The enhanced electrocatalytic performance is related to the creation of Pt-WOx interfacial sites. |
