Effect of Ni ratio on mesoporous Ni/MgO nanocatalyst synthesized by one-step hydrothermal method for thermal catalytic decomposition of CH4 to H2

The Ni/MgO catalysts were synthesized by hydrothermal method and the effect of changes in nickel ratio on the physicochemical properties and catalytic performance were investigated for TCD of CH4 to H-2. In all catalysts, the only NiO-MgO phase as solid solution was formed, and crystals size were in the nanoparticles range. The results confirmed that the catalysts with mesoporous structure and high porosity were successfully synthesized by one step in the absence of surfactants. The increasing nickel ratio from 10 to 40 wt% increases the methane conversion from 28.3 to 48.6% and hydrogen yield from 33.2 to 53.2%, respectively. Also, the stability of catalysts depends on the amount and size of nickel particles in the structure of the catalysts. Among the catalysts, 40 and 30 wt% showed the highest initial activity (48.6% methane conversion) and the highest stability (above 45% hydrogen yield for 180 min), respectively.& nbsp;(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

Ni/MgO catalysts were synthesized by hydrothermal method, and increasing nickel ratio led to higher methane conversion and hydrogen yield. The stability of catalysts depended on the amount and size of nickel particles.