Patent ID: 9463444
Filing Date: 2016-10-11
CPC Classification: B01J,C07C

Claim Text:
1. A preparation process for nanocatalysts with (111) crystal facet exposed, comprising the following steps: step a), adding carrier into a mixed solution of active component precursor, reductant, capping agent, and stabilizer; step b), in situ supporting the active component nanoparticles onto the carrier under the condition of heating and stirring; and step c), washing and drying the sample obtained in step b), to obtain the nanocatalysts with (111) crystal facet exposed, wherein, the active component precursor is a nitrate compound of gold, palladium or platinum, an acetate compound of gold, palladium or platinum, a halide compound of gold, palladium or platinum, or a combination thereof; the reductant comprises one or more compounds selected from the group consisting of sodium borohydride, hydrazine hydrate, ascorbic acid, formaldehyde, formic acid, sodium formate, sodium acetate, citric acid, glucose, and ethylene glycol; the capping agent is a compound comprising a citrate ion or an oxalate ion; and the stabilizer is selected from an organic polymer comprising polyvinylpyrrolidone or poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer, or a long chain alkylammonium salt comprising cetyl trimethyl ammonium bromide or cetyl trimethyl ammonium chloride.