300th Poseidon AX Publication!!

In this study, Prof. Jianbo Wu, Prof. Xiaoqing Pan and Prof. Wenpei Gao looked at the corrosion of electrocatalysts during electrochemical operations using the Poseidon. Using electrochemical liquid cell transmission electron microscopy (LC-TEM) the authors have captured the intricate electrochemical corrosion of Pd@Pt core-shell octahedral nanoparticles, observing their transformation from solid particles into Pt nanoframes. During continuous in-situ cyclic voltammetry, redox peaks were recorded indicating an etching and deposition process. These experiments captured structural evolution, attributed site-specific Pt and Pd atomic dynamics to individual oxidation and reduction events. Pd atoms migrate from the core to the surface, followed by selective corrosion of Pt (111) terraces over edges or corners.

This pioneering work provides delivers sights into the surface reconstruction of nanoparticles during complex electrochemical processes, enhancing our understanding of catalyst degradation and paving the way for more resilient electrocatalysts.

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