A heat treatment method-induced product selectivity switch for CO₂ reduction over Ni/MoO₂

MoO₂-encapsulated Ni and unencapsulated Ni were successfully prepared by using different heat-treatment methods. The dominant reaction switches from CO₂ methanation over unencapsulated Ni to RWGS over MoO₂-encapsulated Ni, where MoO₂ and Ni are responsible for activating CO₂ and supplying H atoms to MoO₂via spillover effects, respectively.