Pd Thickness Optimization on Silicate Sheets for Improving Catalytic Activity

doi:10.1002/admi.202202368

Pd Thickness Optimization on Silicate Sheets for Improving Catalytic Activity

2023-01-13

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DOI：10.1002/admi.202202368

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Maximizing surface-to-body ratio demands ever smaller metallic palladium (Pd) nanoparticles for catalytic applications. The quest for miniaturization is now reaching the single-atom limit. However, if the supported Pd is below a critical size, the Pd hybridization with the supporting material can detrimentally reduce the labile electrons that facilitate the catalytic reactions. Thus, the smallest attainable size, i.e., single-atom Pd, may not offer the best efficiency. Here, it is demonstrated that Pd with at least six atomic layers (or thickness of approximate to 1 nm) on the silicate sheets, synthesized via the partial exfoliation of a layered silicate, exhibits a metallic-like electronic property, yielding an excellent catalytic activity (e.g., turnover frequency) for dehydrogenating formic acid higher than both isotropic Pd nanoparticles and single-atom Pd.

Keywords:

density functional theory

electronic localization function

H-2 production

layered silicate

palladium nanoparticle

Pd Thickness Optimization on Silicate Sheets for Improving Catalytic Activity

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