Highly Efficient Ni/MgO@NCFs Catalyst for Ammonia Decomposition: Enhanced Activity and Stability

This study presents the synthesis of Ni/MgO@NCFs, a highly efficient catalyst for ammonia decomposition, using nickel nanoparticles (NPs) dispersed on MgO and N-doped carbon nanofibers (NCFs). The synthesis involved a combination of pyrolysis and hydrothermal methods. X-ray diffraction (XRD) and Raman analyses studied the crystal formation of the heterostructure, while high-resolution transmission electron microscopy (HR-TEM) revealed that the Ni NPs, with a size of 4.5 nm, were uniformly embedded in the NCFs.

The optimized Ni@MgO-NCFs (10 wt.%) catalyst demonstrated superior catalytic performance and excellent stability for 60 hours at temperatures of 300 ﾰC and 450 ﾰC. This research highlights the potential of the Ni@MgO-NCFs catalyst as an effective catalyst for ammonia decomposition, emphasizing the importance of controlling the metal-support interaction to enhance catalytic activity. This approach offers a promising strategy for COx-free hydrogen production.