Fig. 5: Structural reconstruction of Co–B/Ru₁₂ single particles.

TEM images of CNE-1@Co–B/Ru₁₂ before (a) and after (b) five CV cycles in 0.1 mol L⁻¹ NaOH containing 0.1 mol L⁻¹ NaNO₃ at a scan rate of 50 mV s⁻¹. c Zoom in on the indicated regions in (a) and (b); the identical regions in (a) and (b) were labeled with the same number and color for easier comparison. TEM images of CNE-1@Co–B/Ru₁₂ before (d), after the 5^th CV cycle (e), and after the 10^th CV cycles (f) in 0.1 mol L⁻¹ NaOH containing 0.1 mol L⁻¹ NaNO₃ at a scan rate of 50 mV s⁻¹. EDX mapping of Co of CNE-1@Co–B/Ru₁₂ before (g), after the 5^th CV cycle (h), and after the 10^th CV cycle (i) in 0.1 mol L⁻¹ NaOH containing 0.1 mol L⁻¹ NaNO₃ at a scan rate of 50 mV s⁻¹. Overlay EDX mapping of Co and Ru for CNE-1@Co–B/Ru₁₂ before (j), after the 5^th CV cycle (k), and after the 10^th CV cycle (l) in 0.1 mol L⁻¹ NaOH containing 0.1 mol L⁻¹ NaNO₃ at a scan rate of 50 mV s⁻¹. Source data for this figure are provided as a Source Data file.