Atomic Electron Tomography: Past, Present and Future

Abstract

This is an Accepted Manuscript for the Microscopy and Microanalysis 2020 Proceedings. This version may be subject to change during the production process.

Recent Progress on Revealing 3D Structure of Electrocatalysts Using Advanced 3D Electron Tomography: A Mini Review

“…(R–U) 3D atomic models (Pt in blue and Fe in red) of particle with a total annealing time of 9 min (R,T) and 16 min (S,U) , respectively, determined by AET (scalebar: 1 nm). Reprinted with permission from ( Miao et al, 2020 ). Copyright 2020, Cambridge University Press.…”

“…Meanwhile, Miao et al developed a reconstruction method called “atomic electron tomography (AET)” for 3D electron tomography without prior knowledge ( Chen et al, 2013 ; Miao et al, 2016 ). This method was applied to a Pt-Fe nanoparticle to rebuild the 3D arrangement of atoms by Zhou et al ( Zhou et al, 2019 ; Miao et al, 2020 ). As a typical bimetallic nanocatalyst, Pt-Fe was studied at the early stage of nucleation, where the 3D reconstruction at atomic resolution revealed that the core of Pt-Fe particle was Pt-rich and remained unchanged, whereas a fraction of the surface and subsurface atoms were arranged to form L1 0 phase during annealing ( Figures 2R–U ).…”