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Phosphorylated manganese oxide electrodeposited from ionic liquid as a stable, high efficiency water oxidation catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
55254 47045 2013 5 PDF Available
Title
Phosphorylated manganese oxide electrodeposited from ionic liquid as a stable, high efficiency water oxidation catalyst
Abstract

Efficient production of hydrogen via water splitting is an important goal that would represent a significant step towards truly sustainable supplies of energy. However, currently available catalysts for water electrolysis are either too low in efficiency or too unstable to be practical in this context. Recognizing the very high stability of manganese phosphate, we describe here a novel catalyst material based on manganese oxide that is both stabilized and sensitized by a surface phosphorylation reaction in an ionic liquid electrodeposition process. XPS and EXAFS data show that the surface of the MnOx contains phosphorous at P to Mn ratio of ∼1:2, indicating that the surface layer contains both phosphate characteristics and oxide characteristics. The catalyst stability was significantly enhanced compared to the previously reported manganese oxide catalysts and more than 25 h of continuous water oxidation is demonstrated.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (381 K)Download as PowerPoint slideHighlights► Surface of manganese dioxide catalyst was modified using hydrated ionic liquid. ► The scanning electron microscopy indicates clear changes in the sample morphology. ► Stability of the catalyst during prolong operation was significantly reduced compared to untreated material. ► More than 25 h of continuous operation were demonstrated.

Keywords
Ionic liquid; Water oxidation; Manganese (IV) oxide
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Phosphorylated manganese oxide electrodeposited from ionic liquid as a stable, high efficiency water oxidation catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 200, 1 February 2013, Pages 36–40
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
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