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

研究成果: Article査読

抄録

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.

本文言語English
ページ(範囲)136-144
ページ数9
ジャーナルJournal of Energy Chemistry
62
DOI
出版ステータスPublished - 2021 11

ASJC Scopus subject areas

  • 燃料技術
  • エネルギー工学および電力技術
  • エネルギー(その他)
  • 電気化学

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