From Isolated Ag+ Ions to Aggregated Ag0 Nanoclusters in Silver-Exchanged Engelhard Titanosilicate (ETS-10) Molecular Sieve: Reversible Behavior
2009
properties of the material. It is further reported that transformation of isolated Ag + ions into aggregated Ag 0 nanoclusters is almost reversible. Cycles of H2-chemical reduction/O2-chemical oxidation and of UV-photoreduction/vis-photo-oxidation are reported. UV-vis, Ag K-edge extended X-ray absorption fine structure (EXAFS), and Fourier transform infrared (FTIR) spectroscopy of adsorbed CO are the main techniques used to monitor the evolution of the silver aggregation along the different reduction/ oxidation treatments.
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