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Structural aspects of PtSn/γ-Al2O3 catalysts prepared through surface-controlled reactions: Behavior in the water denitrification reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
40400 45852 2013 8 PDF Available
Title
Structural aspects of PtSn/γ-Al2O3 catalysts prepared through surface-controlled reactions: Behavior in the water denitrification reaction
Abstract

This research focuses on the controlled preparation and characterization of PtSn/γ-Al2O3 catalysts and their activity and selectivity in water denitrification by reduction of NO3− and NO2− ions with hydrogen. The bimetallic PtSn catalysts were active in the hydrogenation of both NO3− and NO2− and the amount of Sn added had a pronounced influence on the activity of the catalysts, being PtSn0.25 catalyst the one with the best performance. An explanation for this behavior is given in terms of the electronic and geometric effects that the addition of tin exerts on Pt.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (115 K)Download as PowerPoint slideHighlights► PtSn/γ-Al2O3 catalysts prepared by Surface Organometallic Chemistry on Metals techniques. ► The selectivity of the preparation reaction led to a strong interaction between Pt and Sn atoms. ► Bimetallic PtSn catalysts are active in the hydrogenation of both NO3− and NO2− in water. ► The amount of Sn added had a pronounced influence on the activity of the catalysts. ► The amount of tin added should be low enough to allow a planar adsorption of NO3− on the Pt clusters.

Keywords
Nitrate; Nitrite; Water denitrification; PtSn catalysts; Organometallic chemistry
First Page Preview
Structural aspects of PtSn/γ-Al2O3 catalysts prepared through surface-controlled reactions: Behavior in the water denitrification reaction
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 453, 26 February 2013, Pages 227–234
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis