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FTIR study of aqueous nitrate reduction over Pd/TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
48409 46505 2008 9 PDF Available
Title
FTIR study of aqueous nitrate reduction over Pd/TiO2
Abstract

The interactions between Pd/TiO2 catalyst and the reactants and potential reaction intermediates present during aqueous nitrate reduction, including NO3−, NO2− and NO in the presence of H2 and H2O were studied by infrared spectroscopy. Adsorbed forms of NO, nitrite and nitrate could all be detected in the presence of water. In the presence of water/H2, nitrate was the most stable surface species followed by nitrite and then highly reactive NO, suggesting that the reduction of nitrate to nitrite is the rate-limiting step. High concentrations of adsorbed nitrite appear to be linked to the detection of gaseous N2O while the formation of ammonia is related to reactions on the Pd surface and the extent of formation is linked to high levels of adsorbed NO in addition to the surface hydrogen availability and the presence of water.

Keywords
Nitrate hydrogenation; FTIR; Water treatment; Pd/TiO2
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 77, Issues 3–4, 10 January 2008, Pages 409–417
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
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