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Electrochemical activity of ruthenium and iridium based catalysts for oxygen evolution reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
46484 46440 2012 5 PDF Available
Title
Electrochemical activity of ruthenium and iridium based catalysts for oxygen evolution reaction
Abstract

Powders of ruthenium and iridium-based materials were synthesized by the thermal decomposition process. The suitable heat treatment of the polymeric precursors allowed to recover metal oxides free from organic carbon, which can be oxidized to carbon dioxide during H2O splitting at elevated potentials. The materials were examined by various physicochemical techniques in order to understand their electrochemical behavior as anodes in a 5 cm2 single proton exchange membrane water electrolyzer. Although the presence of Ir in the electrocatalyst composition contributes undoubtedly to its stability against ruthenium dissolution and the Faradaic efficiency of the PEM electrolysis cell, its great amount increases the overpotential value. The activity of the home made RuxIr1−xO2 anodes towards the oxygen evolution reaction occurs at ca. 1.5 V at 25 °C.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ru- and Ir-based materials synthesized by Pechini–Adams method. ► Anode catalysts prepared free from carbon substrate. ► A single 5 cm2 PEM Water electrolysis. ► Good activity of RuxIr1−xO2 anodes towards OER.

Keywords
Water electrolysis; Iridium; Ruthenium based electrocatalysts; Metal oxides; Pechini–Adams
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Electrochemical activity of ruthenium and iridium based catalysts for oxygen evolution reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 376–380
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us