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Laser‐Induced Formation of Metal–Peroxide Linkages on the Surface of Lanthanum Sesquioxide under Oxygen
Author(s) -
Weng Wei Zheng,
Wan Hui Lin,
Li Jian Mei,
Cao Ze Xing
Publication year - 2004
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200351706
Subject(s) - sesquioxide , lanthanum , metal , oxygen , peroxide , chemistry , inorganic chemistry , hydrogen peroxide , materials science , metallurgy , organic chemistry
Laser irradiation of La 2 O 3 under oxygen at 300–500 °C with the beam of a microprobe Raman spectrometer ( λ =325, 514.5, or 632.8 nm) caused the emergence of a peroxide band at ≈840 cm −1 at the expense of the ν LaO IIband at ≈400 cm −1 with clear isosbestic points at 389 and 558 cm −1 (see picture). This photoexcitation process has implications for laser Raman spectroscopic studies on lanthanide oxide catalysts under working conditions.