In situ ESR study of gold supported on NaY zeolite
Release time:2019-03-09
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First Author:
Qu, Z.
Correspondence Author:
Roduner, E (reprint author), Univ Stuttgart, Inst Phys Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
Co-author:
Roduner, E.
Date of Publication:
2009-09-01
Journal:
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
4
Issue:
5,SI
Page Number:
602-606
ISSN No.:
1932-2143
Key Words:
ESR; gold nanoparticle; Au(II) complex; NaY zeolite
Abstract:
Electron spin resonance (ESR) spectroscopy was used to study the anchoring of a Au complex and gold nanoparticles in NaY type zeolites. The complex of Au(II) with two nitrogen atoms of two ethylenediamine ligands [g(iso) = 2.053, A (Au) = 16.4 G, A (N) = 15.0 G.] in the supercage of the zeolite and conduction electron spin resonance (CESR) of gold particles with 1.56-nm diameter (g = 2.064) were observed. Their formation and stability were related with the gold concentration and the pre-treatment conditions. The small gold particles stabilized in the supercage of zeolite were formed in the samples with low gold concentration after oxygen pre-treatment. The confinement in the zeolite pores obviously prevents the Au(II) complex bound to two nitrogen ligands from undergoing disproportionation. (C) 2009 Curtin University of Technology and John Wiley & Sons, Ltd.
Translation or Not:
no
