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Stabilizing undercoordinated single-atom Pdδ+ sites on CeO2-x nano-island for efficient hydrogenation of nitrile butadiene rubber
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DOI：10.1016/j.gce.2026.07.004.png)
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Abstract
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• Undercoordinated Pdδ+ single-atom sites are steadily anchored on CeO2−x nano-islands (Pd1/CeO2−x/SiO2), achieving an exceptional NBR hydrogenation degree of 99.8%. • The stable undercoordinated Pdδ+ single-atom sites in Pd1/CeO2−x/SiO2 deliver outstanding cycling stability over 10 consecutive runs. • The high surface area of Pd1/CeO2−x/SiO2 promotes efficient mass transfer of long-carbon-chain NBR molecules and improves the atomic efficiency of Pd active sites. • In-situ characterization and theoretical calculations reveal that the remarkable hydrogenation performance originates from the enhanced adsorption of C=C bonds on Pd1/CeO2−x/SiO2.
Keywords:
Single-atom catalyst
Undercoordinated Pdδ+ site
CeO2-x nano-island
Nitrile butadiene rubber
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