| Abstract Scope |
The hydrogen evolution reaction (HER) is an important water splitting reaction that requires efficient and durable catalysts. Representatively, Pt/C shows the highest catalytic activity and efficiency for HER but has limitations such as cost and durability. In this study, we introduce a negatively charged (NC) Pt/C catalyst, in which the Pt is negatively charged, demonstrating enhanced activity and stability with approximately 10 wt.% of Pt content. The NC Pt exhibits a work function of 4.8 eV, which is significantly lower than that of conventional Pt (5.6 eV). In particular, the NC Pt/C exhibits an overpotential of 20 mV (@10 mA cm⁻² in 0.5 M H₂SO₄), compared to 34 mV for commercial Pt/C for HER. Furthermore, the stability of NC Pt/C is remarkable, keeping the initial performance over 1 month. This study demonstrates the potential of NC Pt/C to reduce Pt usage in HER applications while improving catalytic efficiency and durability. |