2 research outputs found
Stepwise Displacement of Catalytically Active Gold Nanoparticles on Cerium Oxide
Aberration-corrected environmental
transmission electron microscopy
(ETEM) proved that catalytically active gold nanoparticles (AuNPs)
move reversibly and stepwise by approximately 0.09 nm on a cerium
oxide (CeO<sub>2</sub>) support surface at room temperature and in
a reaction environment. The lateral displacements and rotations occur
back and forth between equivalent sites, indicating that AuNPs are
loosely bound to oxygen-terminated CeO<sub>2</sub> and may migrate
on the surface with low activation energy. The AuNPs are likely anchored
to oxygen-deficient sites. Observations indicate that the most probable
activation sites in gold nanoparticulate catalysts, which are the
perimeter interfaces between an AuNP and a support, are not structurally
rigid
Stepwise Displacement of Catalytically Active Gold Nanoparticles on Cerium Oxide
Aberration-corrected environmental
transmission electron microscopy
(ETEM) proved that catalytically active gold nanoparticles (AuNPs)
move reversibly and stepwise by approximately 0.09 nm on a cerium
oxide (CeO<sub>2</sub>) support surface at room temperature and in
a reaction environment. The lateral displacements and rotations occur
back and forth between equivalent sites, indicating that AuNPs are
loosely bound to oxygen-terminated CeO<sub>2</sub> and may migrate
on the surface with low activation energy. The AuNPs are likely anchored
to oxygen-deficient sites. Observations indicate that the most probable
activation sites in gold nanoparticulate catalysts, which are the
perimeter interfaces between an AuNP and a support, are not structurally
rigid