Ni-Co bimetallic catalysts significantly outperform to individual monmetallic catalysts for dry reforming of methane using CO2, in particular in the resistance to carbon deposition (coking) and thus prolonged catalyst lifetime. However the function of individual metals remains uncertain and the mechanistic scheme of coking necessitate to uncover. As proved in literatures, Inelastic neutron scattering (INS) technique provides powerful tools to analyse the carbonaceous species formed in the dry reforming, pecularly useful to determine the participation of hydrogen which is impossible to be clarified by IR or Raman, in the spent catalysts. The support effects can also be explored via such powerful INS technique. We will conduct INS experiements for 32 Ni-Co alloy catalysts supported on Al2O3, TiO2, CeO2 and Spinel (8 samples on each support) to clarify effects of alloy and supports.