Scandium oxide as a dehydrogenation and dehydration catalyst

Konenko, I. R.; Tolstopyatova, A. A.; Balandin, Alexander A.

doi:10.1007/bf00843786

Cited by 2 publications

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“…Rare earth elements consist of lanthanides, yttrium (Y), and scandium (Sc), a total of 17 elements . Nowadays, a large number of rare earth materials have been used in a variety of technologies. , Among them, rare earth organometallic compounds and oxides show catalytic activities for some traditional high-temperature chemical reactions such as dehydrogenation and alkylation. − Since the multishell electrons of the rare earth element participate in bonding, the strong adsorption of reactant molecules on rare earths results in the difficulty of releasing reactant molecules at room temperature. Therefore, the rare-earth-based catalysts are generally considered inactive for the room-temperature electrochemical reactions, except being used as catalyst promoters or carriers in a few studies. − From another point of view, the rich electron orbitals of rare earth elements can form strong coordination bonds with the anions on the supports, which is beneficial to the preparation of SACs.…”

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Rare Earth Single-Atom Catalysts for Nitrogen and Carbon Dioxide Reduction

et al. 2020

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Single-atom catalysts (SACs) have attracted much attention owning to their high catalytic properties. Herein, yttrium and scandium rare earth SACs are successfully synthesized on a carbon support (Y1/NC and Sc1/NC). Different from the well-known M–N4 structure of M–N–C (M = Fe, Co) catalysts, Sc and Y atoms with a large atomic radius tend to be anchored to the large-sized carbon defects through six coordination bonds of nitrogen and carbon. Although Y- and Sc-based nanomaterials are generally inactive to room-temperature electrochemical reactions, Y1/NC and Sc1/NC SACs exhibit catalytic activities to nitrogen reduction reaction and carbon dioxide reduction reaction due to the modulation of the local electronic structure of Y/Sc single atoms by N and C coordination. The catalytic functions of rare earth single atoms not only demonstrate the magical effect of SACs but also promote the application of rare earth catalysts in room-temperature electrochemical reactions.

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