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Nanoparticles

Chemical & Biological Engineering Graduate Theses & Dissertations

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Preparation Of Supported Metal Catalysts By Atomic And Molecular Layer Deposition For Improved Catalytic Performance, Troy Donald Gould Jan 2014

Preparation Of Supported Metal Catalysts By Atomic And Molecular Layer Deposition For Improved Catalytic Performance, Troy Donald Gould

Chemical & Biological Engineering Graduate Theses & Dissertations

Creating catalysts with enhanced selectivity and activity requires precise control over particle shape, composition, and size. Here we report the use of atomic layer deposition (ALD) to synthesize supported Ni, Pt, and Ni-Pt catalysts in the size regime (< 3 nm) where nanoscale properties can have a dramatic effect on reaction activity and selectivity.

This thesis presents the first ALD synthesis of non-noble metal nanoparticles by depositing Ni on Al2O3 with two half-reactions of Ni(Cp)2 and H2. By changing the number of ALD cycles, Ni weight loadings were varied from 4.7 wt% to 16.7 wt% and the average particle sizes ranged from 2.5 to 3.3 nm ...