Atomic Layer Deposition Overcoating: Tuning Catalyst Selectivity for Biomass Conversion

Hongbo Zhang, Xiang Kui Gu, Christian Canlas, A. Jeremy Kropf, Payoli Aich, Jeffrey P. Greeley, Jeffrey W. Elam, Randall J. Meyers, James A. Dumesic, Peter C. Stair, Christopher L. Marshall

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49 Citations (Scopus)

Abstract

The terraces, edges, and facets of nanoparticles are all active sites for heterogeneous catalysis. These different active sites may cause the formation of various products during the catalytic reaction. Here we report that the step sites of Pd nanoparticles (NPs) can be covered precisely by the atomic layer deposition (ALD) method, whereas the terrace sites remain as active component for the hydrogenation of furfural. Increasing the thickness of the ALD-generated overcoats restricts the adsorption of furfural onto the step sites of Pd NPs and increases the selectivity to furan. Furan selectivities and furfural conversions are linearly correlated for samples with or without an overcoating, though the slopes differ. The ALD technique can tune the selectivity of furfural hydrogenation over Pd NPs and has improved our understanding of the reaction mechanism. The above conclusions are further supported by density functional theory (DFT) calculations.

Original languageEnglish
Pages (from-to)12132-12136
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number45
DOIs
Publication statusPublished - Nov 1 2014

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Keywords

  • atomic layer deposition
  • biomass
  • catalyst selectivity
  • hydrogenation
  • palladium

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Zhang, H., Gu, X. K., Canlas, C., Kropf, A. J., Aich, P., Greeley, J. P., Elam, J. W., Meyers, R. J., Dumesic, J. A., Stair, P. C., & Marshall, C. L. (2014). Atomic Layer Deposition Overcoating: Tuning Catalyst Selectivity for Biomass Conversion. Angewandte Chemie - International Edition, 53(45), 12132-12136. https://doi.org/10.1002/anie.201407236