A Universal Nano-capillary Based Method of Catalyst Immobilization for Liquid-Cell Transmission Electron Microscopy
Autor: | Corina Andronescu, Steffen Cychy, Wolfgang Schuhmann, Yen-Ting Chen, Martin Muhler, Tsvetan Tarnev |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Materials science
Working electrode ethanol oxidation Capillary action Chemie Nanoparticle 010402 general chemistry Electrocatalyst 01 natural sciences Catalysis Nano electrocatalysis liquid-cell TEM nano electrochemistry nickel boride Deposition (phase transition) chemistry.chemical_classification 010405 organic chemistry Communication General Chemistry Polymer Communications 0104 chemical sciences Chemical engineering chemistry Transmission electron microscopy ddc:540 Electrocatalysis |
Zdroj: | Angewandte Chemie International Edition Angewandte Chemie (International Ed. in English) |
Popis: | A universal nano‐capillary based method for sample deposition on the silicon nitride membrane of liquid‐cell transmission electron microscopy (LCTEM) chips is demonstrated. It is applicable to all substances which can be dispersed in a solvent and are suitable for drop casting, including catalysts, biological samples, and polymers. Most importantly, this method overcomes limitations concerning sample immobilization due to the fragility of the ultra‐thin silicon nitride membrane required for electron transmission. Thus, a straightforward way is presented to widen the research area of LCTEM to encompass any sample which can be externally deposited beforehand. Using this method, NixB nanoparticles are deposited on the μm‐scale working electrode of the LCTEM chip and in situ observation of single catalyst particles during ethanol oxidation is for the first time successfully monitored by means of TEM movies. A novel universal method of single catalyst nanoparticle immobilization on the working electrode without damaging the fragile membrane allows single NixB nanoparticle catalysts to be monitored in situ during ethanol oxidation by means of TEM movies. |
Databáze: | OpenAIRE |
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