In-situ observation of Cu-Pt core-shell nanoparticles in the atomic scale by XAFS

Thermal Stability of Core–Shell Nanoparticles: A Combined in Situ Study by XPS and TEM

“…Furthermore, the results suggest that annealing at vacuum pressure created a reducing environment of the Ni-Co core-shell NPs. These results correlate to reduction of surface oxides from previous in situ annealing of NPs 16,49,50 .…”

“…These results correlate to the reduction of surface oxides from previous in situ annealing of NPs. 16,49,50 Ni Diffusion from the Core to the Shell. The acquisition of the EDS maps and SAED patterns was crucial in resolving the structural changes in the core−shell NPs.…”

“…Refs. 16,49,50 ). At low annealing temperatures, the presence of the oxide layer stabilized the structure of the NP and prevented any transport process to occur.…”

“…In some cases, exceptional catalytic properties have been attributed to the resulting core-shell structure after thermal annealing and oxidation-reduction cycles of initially bimetallic mixed nanoalloys [16][17][18][19][20] . Hence, experiments starting with core-shell NPs are necessary to confirm, understand, and exploit the catalytic properties of these NP structures as viable catalysts in industrial applications.…”

“…In some cases, exceptional catalytic properties have been attributed to the resulting core–shell structure after thermal annealing and oxidation–reduction cycles of initially bimetallic mixed nanoalloys. − Hence, experiments starting with core–shell NPs are necessary to confirm, understand, and exploit the catalytic properties of these NP structures as viable catalysts in industrial applications. In fact, the material’s structural stability under the high-temperature conditions of normal operations is an important factor to investigate since these nanostructures may be unstable at temperatures far below the melting temperature of the bulk .…”