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• W3107636088 abstract "Abstract Herein, we report on the synthesis of ultrasmall Pd nanoclusters (∼2 nm) protected by L‐cysteine [HOCOCH(NH 2 )CH 2 SH] ligands (Pd n (L‐Cys) m ) and supported on the surfaces of CeO 2 , TiO 2 , Fe 3 O 4 , and ZnO nanoparticles for CO catalytic oxidation. The Pd n (L‐Cys) m nanoclusters supported on the reducible metal oxides CeO 2 , TiO 2 and Fe 3 O 4 exhibit a remarkable catalytic activity towards CO oxidation, significantly higher than the reported Pd nanoparticle catalysts. The high catalytic activity of the ligand‐protected clusters Pd n (L‐Cys) m is observed on the three reducible oxides where 100 % CO conversion occurs at 93–110 °C. The high activity is attributed to the ligand‐protected Pd nanoclusters where the L‐cysteine ligands aid in achieving monodispersity of the Pd clusters by limiting the cluster size to the active sub‐2‐nm region and decreasing the tendency of the clusters for agglomeration. In the case of the ceria support, a complete removal of the L‐cysteine ligands results in connected agglomerated Pd clusters which are less reactive than the ligand‐protected clusters. However, for the TiO 2 and Fe 3 O 4 supports, complete removal of the ligands from the Pd n (L‐Cys) m clusters leads to a slight decrease in activity where the T 100% CO conversion occurs at 99 °C and 107 °C, respectively. The high porosity of the TiO 2 and Fe 3 O 4 supports appears to aid in efficient encapsulation of the bare Pd n nanoclusters within the mesoporous pores of the support." @default.
• W3107636088 created "2020-12-07" @default.
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• W3107636088 date "2020-12-30" @default.
• W3107636088 modified "2023-10-01" @default.
• W3107636088 title "Ligand‐Protected Ultrasmall Pd Nanoclusters Supported on Metal Oxide Surfaces for CO Oxidation: Does the Ligand Activate or Passivate the Pd Nanocatalyst?" @default.
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• W3107636088 doi "https://doi.org/10.1002/cphc.202000656" @default.
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