Table 2. Summary of Formation Rates and Selectivities for Materials Investigated, Alongside Reference Data for Materials Previously Tested in the Same Conditions.

	formation rate, mmol s–1 molPd/Cu–1			selectivity
material , (wt% Pd/Cu)	CH3OH + DMEa	CO	CH4	S(CH3OH+DME)/ S(CO)/ S(CH4)
PdGa@SiO2 (1.08)	6.40	1.57	<0.01b	81/19/n/a
Pd@SiO2 (1.61)	0.14	0.50	0.03	20/75/5
Ga@SiO2 (n/a)	n/ab	n/ab	n/ab	n/a
Cu@SiO2c (4.5)	0.23	0.24	<0.01b	49/51/n/a
Cu@ZrO2c (2.33)	0.51	0.30	n/a	67/33/n/a
CuGa@SiO2c (3.88)	0.72	0.06	n/a	93/7/n/a

^aConditions: 3:1:1 (H₂/CO₂/Ar), 25 bar, 230 °C, 200 mg of catalyst, 5 g of SiC, 6–100 sccm. Normalized by mole carbon. n/a indicates not applicable.

^bBelow the detection limit of the thermal conductivity detector/flame ionization detector.

^cPreviously reported under the same conditions.^11,27