COLL 130 |
| Daniel E. Resasco1, Leandro Balzano2, Olga Matarredona3, and Siriporn Jongpatiwut2. (1) School of Chemical Engineering and Materials Science, Oklahoma University, 100 East Boyd Street, Norman, OK 73019, (2) School of Chemical Engineering and Materials Science, University of Oklahoma, Norman, OK 73019-1004, (3) South West Nanotechnologies, Norman, OK 73019 |
| We have developed a unique catalyst formulation and production process that generates SWNT of high quality. The synthesis process can be operated in a continuous mode and readily scaled-up to a cost-effective production. A great advantage of this process is that allows for control of the nanotube diameter. This control opens the possibility of tailoring the porosity of these materials for their use as catalyst supports. In this contribution, we will describe our efforts to obtain uniform deposition of metals (Pt) over SWNT. For that purpose, charged metal precursors were contacted with SWNT in aqueous solutions. In order to achieve ion exchange similar to that widely employed with oxide-supports, we have investigated the charges on the surface of our SWNT and observed that the point of zero charge (PZC) can be adjusted by varying the nanotube pretreatment. The Pt particles were characterized by EXAFS, TEM, and catalytic activity measurements. |
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The Science and Engineering of Catalyst Preparation
8:30 AM-11:55 AM, Monday, March 29, 2004 Marriott -- Orange County 3, Oral
Division of Colloid and Surface Chemistry |