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Imaging Catalytic Surfaces by Multiplexed Capillary Electrophoresis With Absorption Detection

By Michael Christodoulou

Abstract

A new technique for in situ imaging and screening heterogeneous catalysts by using multiplexed capillary electrophoresis with absorption detection was developed. By bundling the inlets of a large number of capillaries, an imaging probe can be created that can be used to sample products formed directly from a catalytic surface with high spatial resolution. In this work, they used surfaces made of platinum, iron or gold wires as model catalytic surfaces for imaging. Various shapes were recorded including squares and triangles. Model catalytic surfaces consisting of both iron and platinum wires in the shape of a cross were also imaged successfully. Each of the two wires produced a different electrochemical product that was separated by capillary electrophoresis. Based on the collected data they were able to distinguish the products from each wire in the reconstructed image

Topics: Capillaries, Gold, Absorption, 37 Inorganic, Organic, Physical And Analytical Chemistry, Catalysts, Electrophoresis, Shape, Detection, Spatial Resolution, Iron, Platinum, Probes
Publisher: Ames Laboratory
Year: 2002
DOI identifier: 10.2172/804534
OAI identifier:
Provided by: UNT Digital Library
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