Highly active and thermostable submonolayer La(NiCo)O(Δ) catalyst stabilized by a perovskite LaCrO(3) support

It is important to develop highly active and stable catalysts for high temperature reactions, such as dry reforming of methane. Here we show a La(NiCo)O(Δ) (LNCO) submonolayer catalyst (SMLC) stabilized by the surface lattice of a perovskite LaCrO(3) support and demonstrate a Ni-Co synergistic effect. The submonolayer/support type catalyst was prepared by in-situ hydrogen reduction of a LaNi(0.05)Co(0.05)Cr(0.9)O(3) precursor synthesized by a sol-gel method. The LNCO-SMLC is highly active and very stable during a 100 h on stream test at 750 °C under the reaction conditions of dry reforming of methane. The catalyst also shows good anti-coking ability. We found that the synergistic effect between Ni and Co atoms in LNCO-SMLC remarkably improved the thermostability of the catalyst. This work provides a useful concept for designing atomically dispersed catalysts with high thermostability.