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Pd@Rh core-shell nanocrystals with well-defined facets and their enhanced catalytic performance towards CO oxidation

Publication ,  Journal Article
Choi, SI; Young, A; Lee, SR; Ma, C; Luo, M; Chi, M; Tsung, CK; Xia, Y
Published in: Nanoscale Horizons
September 1, 2019

Here we report a facile synthesis of Pd@Rh core-shell nanocrystals with octahedral and cubic shapes. Under optimized conditions, Rh atoms can be deposited on Pd octahedral or cubic seeds in a layer-by-layer fashion to generate core-shell nanocrystals with a well-controlled shape. We then use CO oxidation as a probe to evaluate the catalytic performance of the core-shell nanocrystals with reference to a number of commercial catalysts. When supported on mesoporous silica, both the octahedral and cubic Pd@Rh nanocrystals show CO to CO2 conversion levels similar to that of a commercial Pt/Al2O3 catalyst while the two catalysts based on pure Rh (commercial Rh/C and Rh nanocubes/silica) needed much higher temperatures to reach the same level of conversion. In terms of ignition temperature, the Rh nanocubes show a value of 260 °C while those of the octahedral and cubic Pd@Rh nanocrystals are as low as 140 and 150 °C, respectively. Our results suggest that there is no significant difference between the octahedral and cubic Pd@Rh nanocrystals in terms of performance towards CO oxidation while both of them are advantageous over Rh nanocubes or Rh/C.

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Published In

Nanoscale Horizons

DOI

EISSN

2055-6764

ISSN

2055-6756

Publication Date

September 1, 2019

Volume

4

Issue

5

Start / End Page

1232 / 1238

Related Subject Headings

  • 4018 Nanotechnology
  • 4016 Materials engineering
  • 3403 Macromolecular and materials chemistry
 

Citation

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Choi, S. I., Young, A., Lee, S. R., Ma, C., Luo, M., Chi, M., … Xia, Y. (2019). Pd@Rh core-shell nanocrystals with well-defined facets and their enhanced catalytic performance towards CO oxidation. Nanoscale Horizons, 4(5), 1232–1238. https://doi.org/10.1039/c9nh00360f
Choi, S. I., A. Young, S. R. Lee, C. Ma, M. Luo, M. Chi, C. K. Tsung, and Y. Xia. “Pd@Rh core-shell nanocrystals with well-defined facets and their enhanced catalytic performance towards CO oxidation.” Nanoscale Horizons 4, no. 5 (September 1, 2019): 1232–38. https://doi.org/10.1039/c9nh00360f.
Choi SI, Young A, Lee SR, Ma C, Luo M, Chi M, et al. Pd@Rh core-shell nanocrystals with well-defined facets and their enhanced catalytic performance towards CO oxidation. Nanoscale Horizons. 2019 Sep 1;4(5):1232–8.
Choi, S. I., et al. “Pd@Rh core-shell nanocrystals with well-defined facets and their enhanced catalytic performance towards CO oxidation.” Nanoscale Horizons, vol. 4, no. 5, Sept. 2019, pp. 1232–38. Scopus, doi:10.1039/c9nh00360f.
Choi SI, Young A, Lee SR, Ma C, Luo M, Chi M, Tsung CK, Xia Y. Pd@Rh core-shell nanocrystals with well-defined facets and their enhanced catalytic performance towards CO oxidation. Nanoscale Horizons. 2019 Sep 1;4(5):1232–1238.
Journal cover image

Published In

Nanoscale Horizons

DOI

EISSN

2055-6764

ISSN

2055-6756

Publication Date

September 1, 2019

Volume

4

Issue

5

Start / End Page

1232 / 1238

Related Subject Headings

  • 4018 Nanotechnology
  • 4016 Materials engineering
  • 3403 Macromolecular and materials chemistry