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Effect of treatment temperature on the performance of RuO2 anode electrocatalyst for high temperature proton exchange membrane water electrolysers

Lookup NU author(s): Professor Suddhasatwa Basu, Emeritus Professor Keith Scott

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Abstract

Ruthenium oxide catalysts were prepared by a sol gel technique and calcined at different temperatures e.g., 400 degrees C, 500 degrees C and 600 degrees C. The catalysts performance for the oxygen evolution reaction was studied using cyclic voltammetry and their performance in a high temperature proton exchange membrane water electrolyser (PEMWE) examined. Physiochemical characterization was carried out to study the thermal stability, oxygen-metal bond formation, crystallinity phase and crystallite size, particle size and elemental analysis by TGA, FTIR, XRD, TEM and EDX respectively. The electrolyte used for electrochemical characterisation was 1.0 M H3PO4 and 0.5 M H2SO4. Additionally, the effect of calcination and electrolyte temperature on oxygen evolution reaction of RuO2 catalysts was studied and the apparent activation energy was determined using chronoamperometry. The prepared RuO2 were tested as anode catalyst in PEMWE in the temperature range of 120-150 degrees C using phosphoric acid doped polybenzimidazole membrane electrolyte. The physio-chemical and electrochemical characterization results indicate that RuO2 calcined at 500 degrees C gave the best performance with a current density of 0.875 A cm(-2) at 1.8 V in a PEMWE operated at 150 degrees C. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Natarajan V, Basu S, Scott K

Publication type: Article

Publication status: Published

Journal: International Journal of Hydrogen Energy

Year: 2013

Volume: 38

Issue: 36

Pages: 16623-16630

Print publication date: 13/12/2013

Online publication date: 29/06/2013

Acceptance date: 24/05/2013

ISSN (print): 0360-3199

ISSN (electronic): 1879-3487

Publisher: Elsevier Ltd

URL: http://dx.doi.org/10.1016/j.ijhydene.2013.05.133

DOI: 10.1016/j.ijhydene.2013.05.133

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