Supporting Information

Table S1. Atomic compositions of Pd and M from XPS analysis for Pd-MxOy/KIT-6 catalysts.

materials / metallic
Pd (%) / oxidized
Pd (%) / metallic
Ma (%) / oxidized
M (%)
Pd-NiO/KIT-6 / 43.5 / 9.5 / 0 / 47.0
Pd-CoO/KIT-6 / 41.9 / 7.0 / 0 / 51.1
Pd-Fe2O3/KIT-6 / 43.8 / 6.5 / 0 / 49.7
aNo metallic M was observed for all Pd-MxOy/KIT-6.

Table S2. The actual loadings of Pd and M in Pd-MxOy/KIT-6 catalysts as analyzed by ICP-OES.

Sample / Pd loading(wt%) / M loading (wt%)
Pd/KIT-6 / 1.01 / -
Pd-NiO/KIT-6 / 0.90 / 0.50
Pd-CoO/KIT-6 / 0.80 / 0.35
Pd-Fe2O3/KIT-6 / 0.88 / 0.48

Table S3. BET surface areas, pore volumes, and average pore sizes of KIT-6 and SiO2 supported Pd-MxOy catalysts.

Samples / BET surface area
(m2/g) / pore volume
(cm3/g) / average pore size
(nm)
KIT-6 / 850 / 1.2 / 7.5
Pd/KIT-6 / 430 / 0.7 / 7.4
Pd-NiO/KIT-6 / 428 / 0.8 / 7.4
Pd-CoO/KIT-6 / 438 / 0.8 / 7.4
Pd-Fe2O3/KIT-6 / 432 / 0.8 / 7.4
SiO2 / 420 / 1.1 / 12.4
Pd/SiO2 / 279 / 0.8 / 12.6
Pd-NiO/SiO2 / 267 / 0.8 / 12.6
Pd-CoO/SiO2 / 287 / 0.8 / 12.6
Pd-Fe2O3/SiO2 / 309 / 0.8 / 12.7

Table S4. The actual loadings of Pd and M in Pd-MxOy/SiO2 catalysts as analyzed by ICP-OES.

Sample / Pd loading(wt%) / M loading (wt%)
Pd/SiO2 / 0.95 / -
Pd-NiO/SiO2 / 0.83 / 0.42
Pd-CoO/SiO2 / 0.66 / 0.30
Pd-Fe2O3/SiO2 / 0.78 / 0.33

Figure S1. The particle size distributions of a) Pd NPs aged at 200 °C; b) PdNi NPs aged at 200 °C; c) PdCo NPs aged at 200 °C; d) PdFe NPs aged at 200 °C.

Figure S2. XPS data of Pd/KIT-6 prepared by reducing PdO/KIT-6 in H2.

Figure S3. The particle size distributions of a) Pd/KIT-6; b) Pd-NiO/KIT-6; c) Pd-CoO/KIT-6; d) Pd-Fe2O3/KIT-6.

Figure S4. Low-angle XRD patterns of a) KIT-6; b) Pd-NiO/KIT-6; c) Pd-CoO/KIT-6; d) Pd-Fe2O3/KIT-6.

Figure S5. N2 adsorption−desorption isotherms and pore size distributions (inset) of a) KIT-6; b) Pd/KIT-6; c) Pd-NiO/KIT-6; d) Pd-CoO/KIT-6; e) Pd-Fe2O3/KIT-6.

Figure S6. TEM images of a) Pd/SiO2; b) Pd-NiO/SiO2; c) Pd-CoO/SiO2; d) Pd-Fe2O3/SiO2.

Figure S7. The particle size distributions of a) Pd/SiO2; b) Pd-NiO/SiO2; c) Pd-CoO/SiO2; d) Pd-Fe2O3/SiO2.

Figure S8. Effect of reaction temperatures on p-CNB conversion and selectivity of different products for catalytic p-CNB hydrogenation over Pd-NiO/KIT-6. Reaction conditions: atmospheric H2 pressure; Pd-NiO/KIT-6 -0.025 g (Pd loading ~1.0 wt%); p-CNB-2.0 g; 50 ml of ethanol; reaction time-3.0 h; speed of agitation-500 rpm.

Figure S9. Effect of reaction time on p-CNB conversion and selectivity of different products of catalytic p-CNB hydrogenation over Pd-NiO/KIT-6. Reaction conditions: atmospheric H2 pressure; reaction temperature-45 oC; Pd-NiO/KIT-6-0.025 g (Pd loading of ~1.0 wt%); p-CNB-2.0 g; 50 ml of ethanol; speed of agitation-500 rpm.

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