The combined steam/dry reforming of clean biogas (CH₄/CO₂ = 50/50 v/v) represents an innovative way to produce synthesis gas (CO + H₂) using renewable feeds, avoiding to deplete the fossil resources and increase CO₂ pollution. The reaction was carried out to optimize the reaction conditions for the production of a syngas with a H₂/CO ratio suitable for the production of methanol or fuels without any further upgrading. Ni-Rh/Mg/Al/O catalysts obtained from hydrotalcite-type precursors showed high performances in terms of clean biogas conversion due to the formation of very active and resistant Ni-Rh bimetallic nanoparticles. Through the utilization of a {Ni₁₀Rh(CO)₁₉}{(CH₃CH₂)₄N}₃ cluster as a precursor of the active particles, it was possible to promote the Ni-Rh interaction and thus obtain low metal loading catalysts composed by highly dispersed bimetallic nanoparticles supported on the MgO, MgAl₂O₄ matrix. The optimization of the catalytic formulation improved the size and the distribution of the active sites, leading to a better catalyst activity and stability, with low carbon deposition with time-on-stream.