Reversible low-temperature redox activity and selective oxidation catalysis derived from the concerted activation of multiple metal species on Cr and Rh-incorporated ceria catalysts

Satoru Ikemoto, Xiubing Huang, Satoshi Muratsugu, Shoko Nagase, Takanori Koitaya, Hirosuke Matsui, Gen Ichi Yokota, Takatoshi Sudoh, Ayako Hashimoto, Yuanyuan Tan, Susumu Yamamoto, Jiayi Tang, Iwao Matsuda, Jun Yoshinobu, Toshihiko Yokoyama, Shinpei Kusaka, Ryotaro Matsuda, Mizuki Tada

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The ceria-based catalyst incorporated with Cr and a trace amount of Rh (Cr0.19Rh0.06CeOz) was prepared and the reversible redox performances and oxidation catalysis of CO and alcohol derivatives with O2 at low temperatures (<373 K) were investigated. In situ X-ray absorption fine structure (XAFS), ambient-pressure X-ray photoelectron spectroscopy (AP-XPS), high angle annular dark-field scanning transmission electron microscopy (HAADF-STEM)-EDS/EELS and temperature-programmed reduction/oxidation (TPR/TPO) revealed the structures and redox mechanisms of three metals in Cr0.19Rh0.06CeOz: dispersed Rh3+δ species (<1 nm) and Cr6-γO3-x nanoparticles (∼1 nm) supported on CeO2 in Cr0.19Rh0.06CeOz were transformed to Rh nanoclusters, Cr(OH)3 species and CeO2-x with two Ce3+-oxide layers at the surface in a concerted activation manner of the three metal species with H2

Original languageEnglish
Pages (from-to)20868-20877
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume21
Issue number37
DOIs
Publication statusPublished - 2019
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Reversible low-temperature redox activity and selective oxidation catalysis derived from the concerted activation of multiple metal species on Cr and Rh-incorporated ceria catalysts'. Together they form a unique fingerprint.

Cite this