fulltext.study @t Gmail

Enhancing photocatalytic oxygen evolution activity of cobalt-based spinel nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
54299 47004 2014 6 PDF Available
Title
Enhancing photocatalytic oxygen evolution activity of cobalt-based spinel nanoparticles
Abstract

•We have successfully synthesized Co3O4, Mn-substituted Co3O4, and Ni-substituted Co3O4 nanoparticle catalysts.•The photocatalytic water oxidation properties of as-made catalysts have been investigated.•By doping Mn into the octahedral sites of Co3O4 spinel, an enhanced oxygen evolution activity was observed.

Photocatalytic water oxidation is one of the critical reactions for solar fuel production from abundant sources. Among all the metal oxides, Co3O4 spinel exhibits a high activity as an oxygen evolution catalyst. In this paper, we demonstrate that the photocatalytic oxygen evolution activity of Co3O4 spinel can be further enhanced by substituting cobalt with manganese in the spinel structure. Using a facile hydrothermal approach, we have successfully synthesized pure, Mn-substituted, and Ni-substituted Co3O4 nanoparticles with a typical particle size of 5–7 nm. The morphologies and crystal structures of the as-synthesized nanoparticle catalysts have been carefully examined using various structural characterization techniques, including PXRD, TEM, gas adsorption, and XAS. The photocatalytic activities of as-made nanoparticles have been investigated using a well-studied visible light driven [Ru(bpy)3]2+-persulfate system. In both Clark electrode and reactor/GC systems, Mn-substituted Co3O4 nanoparticles exhibited the highest TOF among all the three catalysts. The data presented in this paper suggest that the photocatalytic water oxidation activity of Co3O4 spinel catalyst could be further enhanced by Mn3.1+ substitution at the octahedral sites.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (253 K)Download as PowerPoint slide

Keywords
Water oxidation; Photocatalysis; Oxygen evolution; Nanoparticle; Co3O4
First Page Preview
Enhancing photocatalytic oxygen evolution activity of cobalt-based spinel nanoparticles
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 225, 15 April 2014, Pages 171–176
Authors
, , , ,
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