Fig. 2: Potential- and time-dependent restructuring of Cu2O cubes observed with EC-TEM. | Nature Materials

Fig. 2: Potential- and time-dependent restructuring of Cu2O cubes observed with EC-TEM.

From: Revealing catalyst restructuring and composition during nitrate electroreduction through correlated operando microscopy and spectroscopy

Fig. 2

a–e, Operando EC-TEM time series of Cu2O cube restructuring acquired with intermittent imaging at −0.2 VRHE (a), −0.3 VRHE (b), −0.4 VRHE (c), −0.5 VRHE (d) and −0.6 VRHE (e) during the reaction at the indicated times in 0.1 M Na2SO4 + 8 mM NaNO3. A new sample was used at each applied potential. The electron flux used in these experiments is 1.75 e− A−2 s−1. f,g, Comparison of postreaction images of in situ and ex situ experiments: EC-TEM images after 2 h at each designated potential (f), and SEM images of Cu2O cubes electrodeposited on carbon paper and reacted on the benchtop for 2 h at the same applied potentials (g).

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