Enhanced Long-Term Stability of Crystalline Nickel-Boride (Ni₂₃B₆) Electrocatalyst by Encapsulation with Hexagonal Boron Nitride.

ABSTRACT: Nickel boride catalysts show great potential as low-cost and efficient alternatives to noble-metal catalysts in acidic media; however, synthesizing and isolating a specific phase and composition of nickel boride is nontrivial, and issues persist in their long-term stability as electrocatalysts. Here, a single-crystal nickel boride, Ni₂₃B₆, is reported which exhibits high electrocatalytic activity for the hydrogen evolution reaction (HER) in an acidic solution, and that its poor long-term stability can be overcome via encapsulation by single-crystal trilayer hexagonal boron nitride (hBN) film. Interestingly, hBN-covered Ni₂₃B₆ on a Ni substrate shows an identical overpotential of 52 mV at a current density of 10 mA cm^-2 to that of bare

SUBMITTER: Ma KY 

PROVIDER: S-EPMC11425285 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature