Atomic‐Level Platinum Filling into Ni‐Vacancies of Dual‐Deficient NiO for Boosting Electrocatalytic Hydrogen Evolution

Abstract Developing low‐cost and high‐efficiency catalysts for sustainable hydrogen production through electrocatalytic hydrogen evolution reaction (HER) is crucial yet remains challenging. Here, a strategy is proposed to fill Ni‐vacancy (Ni v ) sites of dual‐deficient NiO (D‐NiO‐Pt) deliberately created by Ar plasma with homogeneously distributed Pt atoms driven by oxygen vacancies (O v ). The incorporated Pt atoms filling the Ni v reduce the formation energy to increase crystal stability, and subsequently combine with additional O v to tune the electronic structure of the surrounding Ni sites. Thus, a more ideal hydrogen adsorption free energy (Δ G H* ) closer to 0 of Ni sites and Pt sites can be achieved.…

• NN
  National Natural Science Foundation of China

  Award: 52175303