Pt modified Ni–Mo-based hydrates as bifunctional electrocatalysts for overall water splitting

Abstract

Pt-Modified Ni–Mo-based nanomaterials were prepared by a simple and effective method. The modified Ni–Mo-based materials exhibited excellent catalytic performance in KOH solution by adjusting the amount of Pt introduced. Due to the introduction of platinum, a large number of defects are formed, thereby improving the performance of the catalyst. At a current density of 100 mA cm⁻², overpotentials of 242 and 448 mV are required for the hydrogen evolution reaction and the oxygen evolution reaction, respectively. The system needs a cell voltage of 1.58 V to reach a current density of 10 mA cm⁻². In addition, the material exhibits good stability for up to 45 hours, which is considered high for bifunctional electrocatalysts. In addition, the effects of hydrothermal and immersion methods on the catalytic performance of platinum were explored. The immersion method shows a strong potential.