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Synthesis, structure and catalytic activity of nano-structured Sr–Ru–O type perovskite for hydrogen production

Paper ID Volume ID Publish Year Pages File Format Full-Text
42191 45914 2010 9 PDF Available
Title
Synthesis, structure and catalytic activity of nano-structured Sr–Ru–O type perovskite for hydrogen production
Abstract

SrRuO3 perovskite was synthesized by three different methods, namely microwave assistant-citrate, citrate-nitrate and coprecipitation. The resulting perovskite structure was characterized by XRD and SEM measurements. The electrocatalytic activity of the perovskites was examined toward hydrogen evolution reaction (HER) by Tafel linear polarization and impedance techniques. SrRuO3 prepared by the microwave method showed superior catalytic activity compared to those synthesized by other chemical methods. The values of the exchange current densities are −14.7 × 102, −52.2 and −13.1 μA cm−2 for SrRuO3 prepared by the microwave, citrate-nitrate and coprecipitation methods, respectively. The reaction order and the activation energy for each catalyst were determined. The calculated values of the activation energy are in good agreement with the trend for catalytic activity. Both Tafel and impedance data showed that the Volmer step is the rate-determining step. The particle size calculated from XRD measurements are 30.7, 41.5 and 42.2 nm for the perovskites prepared by microwave assistant-citrate, citrate-nitrate and coprecipitation methods, respectively.

Graphical abstractThe present work deals with the synthesis of a novel type of perovskites that is used as electrode materials for the electrocatalytic production of hydrogen. The new catalyst prepared by microwave-assisted citrate methods showed excellent improvement in the production rate of hydrogen.Figure optionsDownload full-size imageDownload high-quality image (56 K)Download as PowerPoint slide

Keywords
Perovskites; Microwave irradiation processing; Nano-particles; Electrocatalyst; Hydrogen evolution reaction; XRD; SEM; Tafel; Impedance
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Synthesis, structure and catalytic activity of nano-structured Sr–Ru–O type perovskite for hydrogen production
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 378, Issue 2, 30 April 2010, Pages 151–159
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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