Metal-Mediated Nitrogen Doping of Carbon Supports Boosts Hydrogen Production from Ammonia.

ABSTRACT: Ammonia is an attractive hydrogen carrier, yet its practical use is limited by the need for efficient catalytic decomposition. We demonstrate that in-situ N-doping of Ru nanoparticles and graphitized carbon nanofiber supports during reaction produces a sharp increase in hydrogen production during the first 40 h, followed by stable activity. Spectroscopic and microscopic analyses, together with density functional theory simulations, reveal that Ru nitridation is rapid and support-independent, resulting in a mechanistic shift from the traditional Langmuir-Hinshelwood to a Mars-van Krevelen pathway, further confirmed by isotopic labelling experiments. In contrast, the progressive nitridation of the carbon support, observed via X-ray photoelectron spectroscopy, modulates the electronic environ

SUBMITTER: Liddy TJ 

PROVIDER: S-EPMC12910157 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature