Exploring the CeO<sub>2</sub> Support Morphology for\nthe Carbon Dioxide Hydrogenation Reaction using Nickel Catalysts

The catalytic activity and stability are examined for\nthe hydrogenation\nof carbon dioxide under atmospheric pressure over 2 wt % Ni/CeO<sub>2</sub> nanorods (2Ni-CeNRs), nanocubes (2Ni-CeNCs), and nanopolyhedra\n(2Ni-CeNPs). The 2Ni-CeNR catalysts display excellent catalytic activity\nand higher stability compared with 2Ni-CeNC and 2Ni-CeNP catalysts.\nA comprehensive understanding of the surface atomic and electronic\nstructure versus activity has been derived using high-resolution electron\nmicroscopy and spectroscopy techniques. High metal dispersion, strong\nmetal–support interaction (SMSI) effect and abundant oxygen\nvacancies are deduced to play a crucial role in determining the catalytic\nactivity and selectivity of the CO<sub>2</sub> hydrogenation reaction.