Tunable Concave Surface Features of Mesoporous Palladium Nanocrystals Prepared from Supramolecular Micellar Templates

Muhammad Iqbal, Yena Kim, Adhitya Gandaryus Saputro, Ganes Shukri, Brian Yuliarto, Hyunsoo Lim, Hiroki Nara, Asma A. Alothman, Jongbeom Na, Yoshio Bando*, Yusuke Yamauchi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Concave metallic nanocrystals with a high density of low-coordinated atoms on the surface are essential for the realization of unique catalytic properties. Herein, mesoporous palladium nanocrystals (MPNs) that possess various degrees of curvature are successfully synthesized following an approach that relies on a facile polymeric micelle assembly approach. The as-prepared MPNs exhibit larger surface areas compared to conventional Pd nanocrystals and their nonporous counterparts. The MPNs display enhanced electrocatalytic activity for ethanol oxidation when compared to state-of-the-art commercial palladium black and conventional palladium nanocubes used as catalysts. Interestingly, as the degree of curvature increases, the surface-area-normalized activity also increases, demonstrating that the curvature of MPNs and the presence of high-index facets are crucial considerations for the design of electrocatalysts.

Original languageEnglish
Pages (from-to)51357-51365
Number of pages9
JournalACS Applied Materials and Interfaces
Volume12
Issue number46
DOIs
Publication statusPublished - 2020 Nov 18

Keywords

  • concave structure
  • density functional theory
  • mesoporous metals
  • micellar templates
  • negative curvature
  • palladium

ASJC Scopus subject areas

  • Materials Science(all)

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