Dry reforming of methane over trimetallic NiFeCu alloy catalysts

A series of trimetallic NiFeCu catalysts with different content of Cu were obtained by coprecipitation. We demonstrated the structural evolution of NiFeCu alloy, especially the segregation of Fe, by changing the CH4/CO2 ratio and operating temperature of methane dry reforming. The increment of reaction temperature and content of CH4 in the feed both aggravate Fe segregation and lead to severe carbon deposition on the catalysts. Importantly, Fe in trimetallic catalysts is much more stable than that in bimetallic catalysts.