“…There are studies reported on the beneficial effect of noble metal addition such as Rh [24], Pt [25,26], Pd [27] and Ru [28] Ni-Co catalysts, San-Jose´-Alonso et al [8] showed that the samples containing the highest amount of cobalt (Co(9) and NiCo(1-8)) exhibited the highest activity and stability. However, they produced much higher amount of coke.…”