Catalytically Active Au Layers Grown on Pd Nanoparticles for Direct Synthesis of H 2 O 2: Lattice Strain and Charge-Transfer Perspective Analyses

Jin Soo Kim, Hong Kyu Kim, Sung Hoon Kim, Inho Kim, Taekyung Yu, Geun Ho Han, Kwan Young Lee, Jae-chul Lee, Jae Pyoung Ahn

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Despite its effectiveness in improving the properties of materials, strain engineering has not yet been employed to endow catalytic characteristics to apparently nonactive metals. This limitation can be overcome by controlling simultaneously lattice strains and charge transfer originated from the epitaxially prepared bimetallic core-shell structure. Here, we report the experimental results of the direct H 2 O 2 synthesis enabled by a strained Au layer grown on Pd nanoparticles. This system can benefit the individual catalytic properties of each involved material, and the heterostructured catalyst displays an improved productivity for the direct synthesis of H 2 O 2 by ∼100% relative to existing Pd catalysts. This is explained here by exploring the individual effects of lattice strain and charge transfer on the alteration of the electronic structure of ultrathin Au layers grown on Pd nanoparticles. The approach used in this study can be viewed as a means of designing catalysts with multiple catalytic functions.

Original languageEnglish
JournalACS Nano
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • catalyst
  • core-shell structure
  • hydrogen peroxide
  • Pd@Au
  • strain engineering

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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