关键词: 氧化钨, 析氢反应, 纳米片, 铂催化剂

Abstract: Platinum-tungsten trioxide (Pt-WO₃) nanosheets were synthesized on nickel foams (NFs) directly. As great conductive networks, NFs substrates could greatly improve the electrode performance of WO₃. The modified platinum nanoparticles not only enhanced the electron transformation of catalysts, but also increased the active sites for hydrogen evolution reaction (HER). Pt-WO₃/NF revealed a better catalytic activity than WO₃/NFs with a smaller Tafel slope (80 mV·dec^-1) and a lower overpotential of 72 mV at the current density of 10 mA·cm^-2. In addition, Pt-WO₃/NF showed great durability and stability during the long-term electrochemical test of 45 h. This work provides a facile strategy of improving transition metal oxides (TMOs) as high activity HER catalysts for promising practical applications.

Key words: tungsten oxide, hydrogen evolution reaction, nanosheets, platinum catalysts