Effect of structure of Pd@Fe core–shell cubes on the enhancement of H2 conversion in direct reaction of H2 and O2

Xiangyun Xiao, Seok Ho Lee, Geun Ho Han, Kyong Ryol Tag, Jae Pyoung Ahn, Hong Kyu Kim, Kwan young Lee, Taekyung Yu

Research output: Contribution to journalArticlepeer-review

Abstract

Structure engineering is an integrated strategy to regulate the performance of nanoparticles for various catalytic reactions, since the nanoparticle composition, shape, and interface affect the reaction activity and selectivity. Herein, we report a simple synthesis of clear core–shell structured Pd@Fe nanocubes with different shell thicknesses, which exhibit higher H2 conversion efficiency in direct hydrogen peroxide generation compared with ordinary Pd cubes. This result can be attributed to two main reasons: (i) the conformal growth of the Fe oxide shell consisting of loose structured Fe3O4 favors H2 penetration, and (ii) the capping agent (Br) on the Pd–Fe3O4 interface that blocks the Pd active sites is removed during the shell formation. Therefore, the Fe oxide shell of the Pd@Fe nanoparticles not only helps maintaining the morphology of the nanoparticles but also increases the number of active sites on the inner core surface, confirming the advantage of the core–shell structure.

Original languageEnglish
Pages (from-to)285-291
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume122
DOIs
Publication statusPublished - 2023 Jun 25

Bibliographical note

Publisher Copyright:
© 2023 The Korean Society of Industrial and Engineering Chemistry

Keywords

  • Core@shell
  • H conversion
  • Interface
  • Magnetic separation
  • Structure effect

ASJC Scopus subject areas

  • General Chemical Engineering

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