Real-time imaging of nanoscale electrochemical Ni etching under thermal conditions

Abstract

The ability to vary the temperature of an electrochemical cell provides opportunities to control reaction rates and pathways and to drive processes that are inaccessible at ambient temperature. Here, we...

Unveiling the Dynamic Oxidative Etching Mechanisms of Nanostructured Metals/Metallic Oxides in Liquid Media Through In Situ Transmission Electron Microscopy

“…Reproduced with permission. [ 41 ] Copyright 2021, Royal Society of Chemistry. F) In situ electrochemical etching of Ni‐Pt nanoparticle in 0.1 m H 2 SO 4 electrolyte solution upon applying a constant potential of +500 mV at different temperatures.…”

“…F) Reproduced with permission. [ 41 ] Copyright 2021, Royal Society of Chemistry. G) Reproduced with permission.…”

“…With these motivations, Herein, we concisely overview recent advancements in the structures and compositions of dynamic evolution of the nanostructured metals and metallic oxides under their oxide etching conditions by in situ liquid cell TEM characterization technique based on different liquid cells (Figure 1). [36][37][38][39][40][41][42] First, as a prerequisite for liquid-phase TEM studies, the development of liquid cell designs is briefly introduced. Afterward, the current achievements of in situ liquid cell TEM/STEM research on the oxide etching mechanisms of nanostructured metals and metallic oxides under different surface chemistry conditions, including radical products, FeCl 3 solution, and different ligands in real-time at nano/atomic scale are highlighted.…”

Modeling nanostructure evolution using temperature-dependent radiolysis and kinetics of nanoscale reactions in liquid cell TEM

“…Serin Lee 1 , Nicholas Schneider 2 , Shu Fen Tan 3 and Frances Ross 3 1 MIT, Cambridge, Massachusetts, United States, 2 Renata Global, United States, 3 MIT, United States Over the last several years, the technique of liquid cell transmission electron microscopy (TEM) has been developed and refined for imaging liquid samples with good spatial and temporal resolution. The most exciting aspect of liquid cell TEM is that it provides us with a way to complete the triangle of structure-properties-processing of materials under controlled conditions that include temperature, electrochemical biasing, and liquid composition [1,2].…”

“…The most exciting aspect of liquid cell TEM is that it provides us with a way to complete the triangle of structure-properties-processing of materials under controlled conditions that include temperature, electrochemical biasing, and liquid composition [1,2]. Temperature control is particularly important as temperature is a key parameter in liquid phase processes such as the operation of battery materials and other electrochemical phenomena such as corrosion and etching, as well as being a useful variable in understanding the physics of crystal growth, nanostructure evolution, and self-assembly [3,4].…”