Three-in-One Strategy to Improve Both Catalytic Activity and Selectivity: Nonconcentric Pd-Au Nanoparticles

Hong Woo Lee, Euiyoung Jung, Geun Ho Han, Min Cheol Kim, Donghun Kim, Kwan Young Lee, Sang Soo Han, Taekyung Yu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In direct H2O2 synthesis, the Pd-Au alloy was considered as a potential catalyst because of its much better performance compared to the prototype Pd; unfortunately, achieving both high activity and selectivity remains a challenge. Here, we synthesized nonconcentric Pd-Au NPs in which Au domain shells are formed only partially on Pd domain cores and tested them for direct H2O2 synthesis. It has three exposed regions of Pd, Au domains, and Pd-Au interfaces in a single NP (hence, a 3-in-1 strategy). Creating nonconcentric forms was demonstrated convincingly by density functional theory calculations. The nonconcentric Pd-Au particles exhibit high and well-balanced performances that are hard to achieve with traditional alloyed Pd-Au. The number of Pd/Au interfaces was found to be the key factor and thus was optimized by controlling the Au precursor concentrations. The hitherto underutilized structure of nonconcentric bimetallic alloys can be useful and thus should be more actively investigated for catalyst development.

Original languageEnglish
Pages (from-to)11098-11105
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume12
Issue number45
DOIs
Publication statusPublished - 2021 Nov 18

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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