Geonwoo Kim1,Unyong Jeong1
Pohang University of Science and Technology1
Geonwoo Kim1,Unyong Jeong1
Pohang University of Science and Technology1
Hydrogen evolution reaction (HER) by electrocatalytic water splitting is an environmentally friendly method to produce hydrogen. Layered transition metal dichalcogenides (TMDCs) have received considerable attention as a promising HER catalyst because of high specific surface area and catalytically active edge sites. However, their catalytically inactive basal planes hinder HER performance. To overcome this problem, an efficient strategy is using Pt/TMDC hybrid nanocatalyst in which TMDC acts not only as the support of dispersed Pt but also as HER catalyst itself. Although There have been the efforts to synthesize better Pt/TMDC (Pt/MoS<sub>2</sub>, Pt/WS<sub>2</sub>) based HER catalyst, Pt/ReS<sub>2</sub> has not been studied yet. In this study, we developed edge enriched ReS<sub>2</sub> supported Pt nanocluster catalysts. ReS<sub>2</sub> nanoparticles<sub> </sub>are synthesized by same facile quick microwave assisted solvothermal method. Pt nanoclusters are dispersed on TMDCs by simple wet impregnation method. The optimized Pt/ReS<sub>2</sub> (400 °C Ar, 10 wt%) exhibits an excellent electrocatalytic activity with low overpotential (20 mV at 10 mA cm<sup>-2</sup>) and small Tafel slope (38 mV dec<sup>-1</sup>). This activity is better to that of commercial Pt-C catalyst for less Pt loading. Also, we demonstrate the Pt-ReS<sub>2</sub> interaction and its effect on electrochemical HER activity.