scholarly journals Applications of in situ electron microscopy in oxygen electrocatalysis

2022 ◽  
Author(s):  
Zhi-Peng Wu ◽  
Hui Zhang ◽  
Cailing Chen ◽  
Guanxing Li ◽  
Yu Han
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Degradation Mechanism ◽  
Structural Evolution ◽  
Reduction Reaction ◽  
Future Research ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
In Situ Electron Microscopy

Oxygen electrocatalysis involving the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) plays a vital role in cutting-edge energy conversion and storage technologies. In situ studies of the evolution of catalysts during oxygen electrocatalysis can provide important insights into their structure - activity relationships and stabilities under working conditions. Among the various in situ characterization tools available, in situ electron microscopy has the unique ability to perform structural and compositional analyzes with high spatial resolution. In this review, we present the latest developments in in situ and quasi-in situ electron microscopic techniques, including identical location electron microscopy, in situ liquid cell (scanning) transmission electron microscopy and in situ environmental transmission electron microscopy, and elaborate their applications in the ORR and OER. Our discussion centers on the degradation mechanism, structural evolution and structure - performance correlations of electrocatalysts. Finally, we summarize the earlier discussions and share our perspectives on the current challenges and future research directions of using in situ electron microscopy to explore oxygen electrocatalysis and related processes.

scholarly journals Fabrication of a liquid cell for in situ transmission electron microscopy

Microscopy ◽  
2020 ◽  
Author(s):  
Xiaoguang Li ◽  
Kazutaka Mitsuishi ◽  
Masaki Takeguchi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cost Effective ◽  
Production Method ◽  
Microscopy Imaging ◽  
Transmission Electron ◽  
In Situ Electron Microscopy ◽  
Liquid Cell ◽  
Si Wafer

Abstract Liquid cell transmission electron microscopy (LCTEM) enables imaging of dynamic processes in liquid with high spatial and temporal resolution. The widely used liquid cell (LC) consists of two stacking microchips with a thin wet sample sandwiched between them. The vertically overlapped electron-transparent membrane windows on the microchips provide passage for the electron beam. However, microchips with imprecise dimensions usually cause poor alignment of the windows and difficulty in acquiring high-quality images. In this study, we developed a new and efficient microchip fabrication process for LCTEM with a large viewing area (180 µm × 40 µm) and evaluated the resultant LC. The new positioning reference marks on the surface of the Si wafer dramatically improve the precision of dicing the wafer, making it possible to accurately align the windows on two stacking microchips. The precise alignment led to a liquid thickness of 125.6 nm close to the edge of the viewing area. The performance of our LC was demonstrated by in situ transmission electron microscopy imaging of the dynamic motions of 2-nm Pt particles. This versatile and cost-effective microchip production method can be used to fabricate other types of microchips for in situ electron microscopy.

scholarly journals In situ electron microscopy observation of the redox process in plasmonic heterogeneous-photo-sensitive nanoparticles

2019 ◽  
Vol 1 (10) ◽  
pp. 3909-3917
Author(s):  
Diego Muraca ◽  
Lucia B. Scaffardi ◽  
Jesica M. J. Santillán ◽  
David Muñetón Arboleda ◽  
Daniel C. Schinca ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ag Nanoparticles ◽  
Redox Process ◽  
Microscopy Observation ◽  
Electron Microscopy Observation ◽  
Transmission Electron ◽  
In Situ Electron Microscopy

Observation of relevant phenomena related with dynamical redox process in a plasmonic heterogeneous-photocatalyst system composed by Ag nanoparticles (NPs) in contact with amorphous AgCl NPs are reported by in situ transmission electron microscopy.

In situ Atmospheric Transmission Electron Microscopy of Catalytic Nanomaterials

MRS Advances ◽  
2018 ◽  
Vol 3 (39) ◽  
pp. 2297-2303 ◽  
Author(s):  
Sheng Dai ◽  
Wenpei Gao ◽  
George W. Graham ◽  
Xiaoqing Pan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Reduction Reaction ◽  
In Situ Observation ◽  
Atmospheric Transmission ◽  
Free Standing ◽  
Gaseous Reaction ◽  
Transmission Electron ◽  
Catalyst Systems

AbstractSignificant developments in micro-electrical-mechanical systems (MEMS)-based devices for use in transmission electron microscopy (TEM) sample holders have recently led to the commercialization of windowed gas cells that now enable the atomic-resolution visualization of phenomena occurring during gas-solid interactions at atmospheric pressure. In situ atmospheric TEM study provides unique information that is beneficial to correlating the structure-properties relationship of catalytic nanomaterials, particularly under realistic gaseous reaction conditions. In this paper, we illustrate the capability of this novel in situ device as applied to our study of two catalyst systems: (1) In situ kinetic growth of free standing Pt nanowires as active catalysts toward oxygen reduction reaction (ORR); (2) In situ observation of facet-dependent oxidation of another promising ORR catalyst, Pt3Co nanoparticles.

Applications of Ion Microscopy and In Situ Electron Microscopy to the Study of Electronic Materials and Devices

1998 ◽  
Vol 4 (3) ◽  
pp. 308-316 ◽  
Author(s):  
R. Hull ◽  
J. Demarest ◽  
D. Dunn ◽  
E.A. Stach ◽  
Q. Yuan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Focused Ion Beam ◽  
Electronic Materials ◽  
Ion Beam ◽  
Microscopy Imaging ◽  
Transmission Electron ◽  
In Situ Electron Microscopy ◽  
Ion Microscopy

We discuss the application of ion microscopy and in situ electron microscopy to the study of electronic and optical materials and devices. We demonstrate how the combination of in situ transmission electron microscopy and focused ion beam microscopy provides new avenues for the study for such structures, enabling extension of these techniques to the study of dopant distributions, nanoscale stresses, three-dimensional structural and chemical reconstruction, and real-time evolution of defect microstructure. We also discuss in situ applications of thermal, mechanical, electrical, and optical stresses during transmission electron microscopy imaging.

scholarly journals In Situ TEM Studies of Catalysts Using Windowed Gas Cells

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 779 ◽  
Author(s):  
Fan Ye ◽  
Mingjie Xu ◽  
Sheng Dai ◽  
Peter Tieu ◽  
Xiaobing Ren ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Structural Evolution ◽  
In Situ Tem ◽  
Gas Cell ◽  
Environmental Transmission ◽  
Transmission Electron ◽  
Wide Range ◽  
Environmental Transmission Electron Microscopy

For decades, differentially pumped environmental transmission electron microscopy has been a powerful tool to study dynamic structural evolution of catalysts under a gaseous environment. With the advancement of micro-electromechanical system-based technologies, windowed gas cell became increasingly popular due to its ability to achieve high pressure and its compatibility to a wide range of microscopes with minimal modification. This enables a series of imaging and analytical technologies such as atomic resolution imaging, spectroscopy, and operando, revealing details that were unprecedented before. By reviewing some of the recent work, we demonstrate that the windowed gas cell has the unique ability to solve complicated catalysis problems. We also discuss what technical difficulties need to be addressed and provide an outlook for the future of in situ environmental transmission electron microscopy (TEM) technologies and their application to the field of catalysis development.

scholarly journals Morphological and Structural Evolution of Co3O4 Nanoparticles Revealed by in Situ Electrochemical Transmission Electron Microscopy during Electrocatalytic Water Oxidation

ACS Nano ◽  
2019 ◽  
Vol 13 (10) ◽  
pp. 11372-11381 ◽  
Author(s):  
Nathaly Ortiz Peña ◽  
Dris Ihiawakrim ◽  
Madeleine Han ◽  
Benedikt Lassalle-Kaiser ◽  
Sophie Carenco ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Water Oxidation ◽  
Structural Evolution ◽  
Co3o4 Nanoparticles ◽  
Transmission Electron
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