Fig. 4From: Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl CarbonateTEM images and corresponding size distribution histograms of Cu NPs in samples: a, e Cu@C-0.03, b, f Cu@C-0.06, c, g Cu@C-0.12, and d, h Cu@C-0.24Back to article page