AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
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Aerosol Synthesis of Palladium Based Nanopowders and Nanoinks in a Flame-Driven High Temperature Reducing Jet Reactor
SHAILESH KONDA, Mohammad Moein Mohammadi, Raymond Buchner, Mark Swihart, University at Buffalo - SUNY
Abstract Number: 497 Working Group: Nanoparticles and Materials Synthesis
Abstract Over the past few years, we have synthesized several types of multicomponent metal and semiconductor nanoparticles using a flame driven High Temperature Reducing Jet (HTRJ) reactor. In the HTRJ process, high speed combustion products pass through a converging-diverging nozzle. An aqueous precursor solution injected at the throat section of the nozzle evaporates and decomposes, initiating nucleation of particles in a reducing environment containing excess H$_2. This allows flame-based synthesis of nanoparticles of metals that can be reduced by H$_2 in the presence of H$_2O. A key advantage of the HTRJ system over other flame-based aerosol synthesis methods is decoupling of the combustion and particle formation zones. In this contribution, we will focus on the synthesis of palladium-based nanopowders and nanoinks. We have prepared a range of binary and ternary alloys of palladium, copper, and silver of controlled composition. The targeted application of these palladium-based nanopowders is polymer nanocomposite membranes for H$_2/CO$_2 separation, where the palladium alloy particles can provide highly selective pathways for H$_2 transport through a membrane. Hence the nanopowders from the flame reactor are dispersed in a polymer-compatible solvent to form nanoinks, then cast into thin film membranes.