Anomalous sublimation passivation of nanotwinned silver particles

Abstract

Metal sublimation plays a crucial role in understanding natural phenomena, purification and advanced manufacturing. Herein, we report anomalous sublimation passivation of nanotwinned silver particles under e-beam irradiation through in situ transmission electron microscopy, wherein the sublimation velocity is reduced by three-quarters due to the formation of five-fold twins. Theoretical calculations reveal that this sublimation passivation mechanism is mainly related to the increment in sublimation energy by the presence of twin boundaries. IMPACT STATEMENT Differing from traditional cognition of defect-assisted sublimation, anomalous sublimation passivation of nanotwinned silver particles under e-beam irradiation has firstly been identified in terms of TEM observations and DFT calculations.

Spatial confinement of sliver nanoparticles in nitrogen-doped carbon framework with high catalytic activity and long-term cycling

“…Although the supported Ag catalysts have been developed, unstable support is still a bottleneck to their widespread applications. Due to its higher surface energy, Ag nanoparticles are readily prone to aggregate during the preparation and catalysis process, which may lead to reduced catalytic activity and cycle capacity (Liu et al, 2015;Sun et al, 2020). Therefore, it remains technical challenge to controllably prepare Ag nanoparticles with a small size range on a stable carrier so far.…”

Probing the sublimation kinetics of Ag, Ag@TiO2, and Ag@C nanoparticles

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