Fig. 3: Structure-performance relationships.
From: Operando TEM study of a working copper catalyst during ethylene oxidation

(a) Schematic illustration of operando TEM technique. (b–e, g, h) In situ HRTEM observations and (i, j) online MS study of Cu catalysts at different temperatures under conditions of the O2-diluted C2H4 oxidation reaction (total pressure: 708 mbar; pO2 = 4.27 mbar, pC2H4 = 170.6 mbar). f Lattice distance profiles for Cu2O measured at the Cu/Cu2O interface and in the central region of the Cu2O portion.