Authors
Tzu-Hsien Shen, Liam Spillane, Jiayu Peng, Yang Shao-Horn, Vasiliki Tileli
Publication date
2022/1
Journal
Nature Catalysis
Volume
5
Pages
30-36
Publisher
Nature Publishing Group
Description
The surface wettability of catalysts is typically controlled via surface treatments that promote catalytic performance. Here we report on potential-regulated hydrophobicity/hydrophilicity at cobalt-based oxide interfaces with an alkaline solution. The switchable wetting of single particles, directly related to their activity and stability towards the oxygen evolution reaction, was revealed by electrochemical liquid-phase transmission electron microscopy. Analysis of the movement of the liquid in real time revealed distinctive wettability behaviour associated with specific potential ranges. At low potentials, an overall reduction of the hydrophobicity of the oxides was probed. Upon reversible reconstruction towards the surface oxyhydroxide phase, electrowetting was found to cause a change in the interfacial capacitance. At high potentials, the evolution of molecular oxygen, confirmed by operando electron energy-loss …
Total citations
202220232024154322
Scholar articles
TH Shen, L Spillane, J Peng, Y Shao-Horn, V Tileli - Nature Catalysis, 2022