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Selectivity of cobalt-based catalysts towards hydrogen peroxide formation during the reduction of oxygen

Paper ID Volume ID Publish Year Pages File Format Full-Text
55006 47036 2013 9 PDF Available
Title
Selectivity of cobalt-based catalysts towards hydrogen peroxide formation during the reduction of oxygen
Abstract

The electrochemical reduction of oxygen has been investigated for a cobalt-amine complex pyrolysed at various temperatures. The activity of the corresponding cobalt-free materials has also been studied. The selectivity of the catalysts towards hydrogen peroxide production has been determined using Koutecky–Levich analysis and rotating ring disc electrochemical measurements. A combination of the rotating ring disc data and studies of the reduction of hydrogen peroxide have been used to investigate the reaction mechanism kinetics. The selectivity towards hydrogen peroxide passes through a minimum at a pyrolysis temperature of 700 °C. The highest activity for oxygen reduction and yield for hydrogen peroxide formation was observed for the catalysts treated at higher temperatures.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (54 K)Download as PowerPoint slideHighlights► Selective catalysts for hydrogen peroxide formation from oxygen. ► Tuning selectivity by means of heat-treatment during catalyst preparation. ► Analysis of oxygen reduction kinetics for cobalt-based catalysts.

Keywords
Electrocatalysis; Oxygen reduction; Hydrogen peroxide synthesis; Rotating ring disc electrode; Pyrolysed materials
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Selectivity of cobalt-based catalysts towards hydrogen peroxide formation during the reduction of oxygen
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 202, 15 March 2013, Pages 135–143
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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