Preparation, Properties and Cytotoxicity Assessment of Nanosized Pt-Rh Composite Catalyst for the Decomposition of Gaseous Ammonia

Chang Mao Hung

doi:10.4028/www.scientific.net/AMR.160-162.1285

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 160-162Preparation, Properties and Cytotoxicity...

Preparation, Properties and Cytotoxicity Assessment of Nanosized Pt-Rh Composite Catalyst for the Decomposition of Gaseous Ammonia

Abstract:

The behavior of the ammonia (NH3) oxidation was by selective catalytic oxidation (SCO) over a nanosized Pt-Rh composite catalyst in a tubular fixed-bed flow quartz reactor (TFBR) at temperatures between 423 and 673 K. The catalysts surface properties were characterized using UV-Vis and TEM. The experimental results show high activities for NH3 removal was achieved during catalytic oxidation over the Pt-Rh catalyst at 673 K with an oxygen content of 4%. N2 was the main product in the NH3-SCO process over the nanosized Pt-Rh composite catalyst. These results also verify that the Pt-Rh metals on catalyst surfaces, resulting in the formation of the remarkable catalytically active sites at the metal-support interface in the reduction of NH3 in this process. In addition, the nanosized Pt-Rh composite-induced cytotoxicity testing was mainly applied to the human lung MRC-5 cell line and the percentage of cell survival was determined by MTS analysis in vitro. For nanosized Pt-Rh composite, only minor cytotoxicity was observed when human lung cells were exposed.

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Periodical:

Advanced Materials Research (Volumes 160-162)

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1285-1290

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.160-162.1285

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Online since:

November 2010

Authors:

Chang Mao Hung

Keywords:

Ammonia, Cytotoxicity, Nanosized Pt-Rh Composite Catalyst, Tubular Fixed-Bed Reactor (TFBR)

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