Methane decomposition through chemical looping reforming (CLR) is emerging as a promising and innovative approach for hydrogen production. This method efficiently transforms various feedstocks into high-purity hydrogen while drastically reducing greenhouse gas emissions. Hydrogen generated through CLR represents an environmentally friendly option, free from direct emissions of air pollutants or greenhouse gases. Additionally, it supports the use of a diverse range of low-carbon energy sources, contributing to its sustainability and versatility. In particular, supported nickel-based catalysts show promising features due to their strong catalytic activity and stability in reforming processes. The present study focuses on the performance of Ni and Ru-Ni catalysts supported on LaMnO₃, synthesized through precipitation assisted by microwave irradiation and sol-gel citrate methods. The redox stability was checked by performing multiple redox cycles during chemical looping experiments carried out isothermally, alternating the gas composition every 10 minutes from 15 vol% of CH₄ in N₂ (reduction) to 15 vol% of CO₂ in N₂ (oxidation). The CLR temperature was selected for each sample based on temperature-programmed reduction tests with methane, choosing for each one the temperature of maximum reduction. Through a comprehensive examination encompassing structural, morphological, and catalytic analyses, it was possible to study the impact of synthesis techniques on the performance of these catalysts in hydrogen production via chemical looping decomposition. These research efforts furnish valuable insights pivotal for the development of efficient and sustainable processes and crucial for meeting the escalating demand for clean energy solutions in the contemporary era.