Fig. 2
From: Potential-induced nanoclustering of metallic catalysts during electrochemical CO2 reduction
Characterizations of the Cu nanoclusters formed during electrolysis. a–e High-resolution HAADF-STEM images of a, b Cu nanoclusters (<3 nm) and c–e Cu nanoparticles (~5 nm) formed from the 41 nm CuNCs during electrolysis for 4.5 h under CO2RR conditions. Circles in a, b, and c enclose regions containing nanoclusters and nanoparticles, respectively. e is a high-magnification view of the region boxed in d. f FFT of the HR-STEM image shown in e. Simulated electron diffraction pattern (blue rings: ring sampling diffraction planes; red spectrum: intensity profile) of Cu are included for reference. Scale bars: a 3 nm, b, c, e 5 nm, d 50 nm, and f 5 nm−1
