Highly stable RuO2/SnO2 nanocomposites as anode electrocatalysts in a PEM water electrolysis cell. (1st August 2013)

• Record Type: Journal Article
• Authors: Lim, Ji Yeon; Rahman, Gul; Chae, Sang Youn; Lee, Kwan‐Young; Kim, Chang‐Soo; Joo, Oh‐Shim
• Is Part Of: International journal of energy research. Volume 38:Number 7(2014:Jun.)
• Page Start: 875
• Page End: 883
• Publication Date: 2013-08-01
• Subjects: Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.3081
• Languages: English
• ISSNs: 0363-907X

Abstract

<abstract abstract-type="main"> <title>SUMMARY</title> <p>This work explores the opportunity to reduce the cost and enhance the stability of RuO₂ as an oxygen evolution reaction catalyst by coating RuO₂ on chemically stable SnO₂ support. Nano‐sized RuO₂/SnO₂ composites of different mass ratios of RuO₂ to SnO₂ (0.45:1, 0.67:1, and 1.07:1) were synthesized using solution‐based hydrothermal method. The physicochemical properties of the RuO₂/SnO₂ were studied by scanning electron microscopy, X‐ray diffraction, transmission electron microscopy, and N₂ adsorption–desorption isotherms. The electrochemical activity of RuO₂/SnO₂ as anode electrocatalyst was investigated in a proton exchange membrane (PEM) water electrolysis cell of Pt/C cathode and Nafion membrane. Experimental results showed that RuO₂/SnO₂ of ratio (1.07:1) exhibit higher electrochemical activity compared to pure RuO₂, resulting ~50% reduction of noble metal content. The extended life test of electrocatalysts for 240 h implied that RuO₂/SnO₂ (1.07:1) significantly improved the stability of electrode in comparison to pure RuO₂ in oxygen evolution processes. Copyright © 2013 John Wiley &amp; Sons, Ltd.</p> </abstract>