Metallic nanoparticle catalysts embedded in porous oxide support, which show high catalytic activity even at low temperatures

A method for preparing a porous catalyst composition having metallic nanoparticles, comprising:

• a step of covering metallic nanoparticles containing at least any one of a metal and a metal oxide with a stabilizer to stabilize the metallic nanoparticles and then binding a polymer to surfaces of the metallic nanoparticles to functionalize the metallic nanoparticles (Step 1);
• a step of mixing an oxide precursor with a solution in which the functionalized metallic nanoparticles and an activator are mixed and dispersed, thereby synthesizing a metallic nanoparticle dispersion embedded in an oxide support (Step 2);
• and
• a step of calcining the metallic nanoparticle dispersion (Step 3),
• wherein the porous catalyst composition comprises the oxide support in which the metallic nanoparticles are dispersed with varying numbers of pores between the metallic nanoparticles,
• wherein there is no gap between the oxide support and the metallic nanoparticles so as to apply compressive stress to the metallic nanoparticles, and
• wherein the oxide support comprises pores having a Body-Centered Cubic (BCC) structure between the metallic nanoparticles,
• wherein the stabilizer is one or more of oleylnamine, sodium citrate, chitosan, polyvinyl alcohol, polyvinylpyrrolidone, polyDADMAC, and oleic acid, and
• wherein the activator is amphiphilic molecules that form a spherical micelle and is a block copolymer of a hydrophilic chain and a hydrophobic chain.