Surface engineering at the interface of core/shell nanoparticles promotes hydrogen peroxide generation

Yonggang Feng, Qi Shao, Bolong Huang, Junbo Zhang, Xiaoqing Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

Abstract

Hydrogen peroxide (H2O2), an environmentally friendly oxidant, has already been widely used in many chemical synthesis and industrials as an alternative to replace traditional oxidants including chlorinated oxidizers and strong acids. However, the conventional synthesis method confronts intense energy cost, tedious separation procedures and high cost, which is not competitive with traditional oxidants. Although directH2O2 synthesis fromH2 and O2 is a green and atomically economic reaction, satisfactory activity and desirable selectivity still remain formidable challenges. Herein, for the first time, a class of Pd@NiO-x nanoparticles (NPs) (x=1, 2, 3 and 4) with a unique core@shell interface structure has been created to achieve high activity, selectivity and stability for the direct H2O2 synthesis. A precise thermal annealing on Pd@Ni-x NPs revealed that the resulting Pd@NiO-x NPs exhibited the volcano-like activity toward direct H2O2 synthesis as a function of annealing temperature and time. By tuning the composition of Pd@NiO-x NPs and the reaction condition, the efficiency of H2O2 synthesis could be well optimized with 5 wt% Pd@NiO-3/TiO2 exhibiting the highest productivity (89 mol/(kgcat h)) and selectivity (91%) to H2O2 as well as excellent stability, making it one of the best catalysts for direct H2O2 synthesis reported to date.

Original languageEnglish
Pages (from-to)895-906
Number of pages12
JournalNational Science Review
Volume5
Issue number6
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Core@shell structure
  • Direct synthesis
  • Hydrogen peroxide
  • Nickel oxide
  • Palladium

ASJC Scopus subject areas

  • General

Cite this