Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate

Table 2 Catalytic performance of Cu@C-X (X = 0.03, 0.06, 0.12, 0.24) catalysts with different Cu core sizes

Catalysts	W_catalyst ^a (g)	Cu particle size^b (nm)		S_DMC (%)	C_MeOH (%)	TOF (h⁻¹)
Catalysts	W_catalyst ^a (g)	TEM	XRD	S_DMC (%)	C_MeOH (%)	TOF (h⁻¹)
Cu@C-0.03	1.6129	30.1	26.6	93.8	2.91	1.35
Cu@C-0.06	1.2712	40.2	35.9	94.1	3.55	1.65
Cu@C-0.12	1.1905	45.1	41.7	94.3	4.38	2.04
Cu@C-0.24	0.9615	55.1	52.2	92.5	3.13	1.43

Reaction Conditions: C_Cu = 150 mmol/L, T = 120 °C, initial pressure = 3.0 MPa (P_CO:P_O2 = 2:1), t = 120 min, stirring speed = 750 rpm, V_MeOH = 10 mL
^aThe weight of catalyst
^bThe size of Cu cores