Preparation and characterization of PdO nanoparticles on trivalent metal (B, Al and Ga) substituted MCM-41: Excellent catalytic activity in supercritical carbon dioxide

- Simultaneous incorporation of PdO nanoparticles and trivalent metal (M3+) in MCM-41.
- Strong influence of Si/ M3+ ratio on PdO particle size.
- Efficient chemoselective hydrogenation of chloronitrobenzene in scCO2 medium.
- Significant effect of trivalent metal on the selectivity of o-, m- and p- isomers.