(509ca) Influencing Selectivity of Ni Reverse Water Gas Shift Catalysts Using Atomic Layer Deposition

Metal nanoparticle size and dispersion can influence product selectivity of supported catalysts. In the case of CO₂ reduction, small, highly dispersed Ni nanoparticles on ceria have shown greater selectivity for the reverse water gas shift (RWGS) reaction over methanation at moderate temperatures. At high Ni loadings, Ni particle size increases, hindering CO selectivity and promoting undesired reactions. In this work, atomic layer deposition (ALD) was leveraged to uniformly deposit Ni nanoparticles on a ceria support with varying Ni loadings. Their performance for RWGS was compared to other Ni/CeO₂ catalysts of equivalent weight loadings synthesized by more traditional techniques.