Water-in-oil reverse micelles of butyl ammonium laurate in hexanes containing sodium hexachlororhodate were reduced with sodium borohydride to yield metallic rhodium nanoparticles. The products were characterized with TEM, HRTEM, and XPS. Rhodium nanoparticles of 1.5, 2.2, and 2.9 nm were obtained with gaussian size distribution (σ = 0.35 nm). The Rh nanoparticles were supported on silica SBA-15 to form Rh/SBA-15 materials. Organic surface stabilizers were removed with calcination in flowing oxygen. Reduction under hydrogen, followed by heating in vacuo led to active materials. TEM revealed the presence of individually resolved nanocrystals located throughout the support that maintained their size after calcination. Chemisorption of H 2, CO, O 2, and H 2 titration of surface O 2 were studied on the Rh/SBA-15 materials. CO hydrogenation was studied on the Rh/SBA-15 materials at 4:1 H 2/CO ratio at 250°-400°C. This is an abstract of a paper presented at the 229th ACS National Meeting (San Diego, CA 3/13-17/2005).
|Original language||English (US)|
|Journal||ACS National Meeting Book of Abstracts|
|State||Published - 2005|
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