Low temperature surface oxygen activation in crystalline MnO2 triggered by lattice confined Pd single atoms

Xuemei Liao, Yonghui Zhao, Changwen Liu, Xiaopeng Li, Yu Sun, Kenichi Kato, Miho Yamauchi, Zheng Jiang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Tuning the coordination environment is the research axis of single atom catalysts (SACs). SACs are commonly stabilized by various defects from support. Here, we report a lattice confined Pd SAC using MnO2 as support. Compared with the Pd clusters anchored on the surface, the lattice confined Pd single atoms allows spontaneous exaction of surrounding lattice oxygen at room temperature when employed in CO oxidation. The MnO2 supported Pd SAC exhibited a high turnover frequency of 0.203 s−1 at low reaction temperature, which is higher than that of recently reported Pd SACs. Theoretical calculations also confirmed the confined monatomic Pd activate lattice oxygen with an ultralow energy barrier. Our results illustrate that the unique coordination environment of single atom provided by lattice confinement is promising to boost the activity of SACs.

Original languageEnglish
Pages (from-to)136-144
Number of pages9
JournalJournal of Energy Chemistry
Volume62
DOIs
Publication statusPublished - Nov 2021

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Electrochemistry

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