Title

Tg/Dta Of Hydrogen Reduction Kinetics Of Tio2 Supported Pdo Chemochromic Pigments

Keywords

Chemochromic; Hydrogen; Kinetics; Sensor; Thermogravimetric analysis

Abstract

Titania supported palladium oxide (PdO) chemochromic pigments have been used in various hydrogen sensing devices as a passive technique for detecting hydrogen leaks. Here, we present new data for the kinetics of titania-supported PdO reduction by hydrogen gas by means of thermogravimetric/differential thermal (TG/DTA) analysis. The TG/DTA thermograms show a two step process. The first step in the process is an induction period during which no color change occurs - having zero reaction order with respect to palladium oxide concentration [PdO]. A color change is associated with the second step during which the adsorbed hydrogen reacts with PdO⋯H species to form water. This step has fast kinetics with reaction order of 0.55 and zero with respect to [PdO⋯H] and [H2], respectively. © 2011 Elsevier B.V.

Publication Date

5-10-2011

Publication Title

Thermochimica Acta

Volume

518

Issue

1-2

Number of Pages

119-122

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.tca.2011.02.019

Socpus ID

79953860166 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79953860166

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