h-BN monolayer on the Ni(111) surface: a potential catalyst for oxidation

Area of Science:

• Materials Science
• Surface Chemistry
• Computational Chemistry

Background:

• Hexagonal boron nitride (h-BN) is typically regarded as an inert material.
• This study investigates the catalytic potential of h-BN when supported on a Ni(111) substrate.

Discussion:

• First-principles density functional theory calculations reveal that O2 nondissociatively adsorbs on h-BN/Ni(111), elongating the O-O bond and forming an activated complex.
• This activated O2 species readily reacts with incoming CO molecules, leading to spontaneous CO2 formation.
• CO adsorption on the h-BN/Ni(111) surface is unfavorable, indicating a selective oxidation pathway.

Key Insights:

• The h-BN monolayer on Ni(111) substrate demonstrates catalytic properties, contrary to the inert nature of free-standing h-BN.
• The Eley-Rideal mechanism facilitates the selective oxidation of CO to CO2.
• This finding opens new avenues for designing catalytic materials based on 2D materials.

Outlook:

• Further experimental validation is needed to confirm the proposed catalytic mechanism.
• Exploring other gas-phase reactions and different substrate materials could expand the applications of h-BN-based catalysts.
• The study provides a theoretical foundation for developing novel catalysts for environmental remediation and chemical synthesis.