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Electrocatalytic hydrogen evolution reaction on reduced graphene oxide electrode decorated with cobaltphthalocyanine

Paper ID Volume ID Publish Year Pages File Format Full-Text
45014 46393 2016 10 PDF Available
Title
Electrocatalytic hydrogen evolution reaction on reduced graphene oxide electrode decorated with cobaltphthalocyanine
Abstract

•Electrocatalytic hydrogen evolution reaction (HER) on azido graphene oxide (GO-N3) and reduced azido graphene oxide (RGO-N3) electrodes.•GCE/RGO-N3/TA-CoPc and GCE/GO-N3/TA-CoPc electrodes decorated with cobaltphthalocyanine.•GCE/RGO-N3/TA-CoPc and GCE/GO-N3/TA-CoPc electrodes modified with click electrochemistry (CEC).•GCE/RGO-N3/TA-CoPc electrode illustrates well electrocatalytic activity by decreasing the over-potential of the bare electrode about 340 mV.•Increasing the current density of GCE/RGO-N3/TA-CoPc electrode about 15 fold at low pHs.

Electrocatalytic hydrogen evolution reaction (HER) on azido graphene oxide (GO-N3) and reduced azido graphene oxide (RGO-N3) electrodes decorated with the cobaltphthalocyanine complex bearing terminal alkyne moieties (TA-CoPc) was investigated. GCE/RGO-N3 electrode was constructed with the electrochemical reduction of GO-N3 coated on a glassy carbon electrode. Decoration of GCE/RGO-N3 and GCE/GO-N3 electrodes were performed with a new electrode modification technique, “click electrochemistry (CEC)”, with which TA-CoPc complex was bonded to azido functional groups of GO-N3 and RGO-N3 on the electrodes. The modified GCE/RGO-N3/TA-CoPc and GCE/GO-N3/TA-CoPc electrodes were characterized with square wave voltammetry and electrochemical impedance spectroscopy (EIS), and then tested as heterogeneous electrocatalysts for HER. GCE/RGO-N3/TA-CoPc electrode illustrates well electrocatalytic activity by decreasing the over-potential of the bare electrode about 340 mV and increasing the current density of the electrode about 15 fold at low pHs with absolutely high stability and reproducibility.

Graphical abstractElectrocatalytic hydrogen evolution reaction (HER) on azido graphene oxide (GO-N3) and reduced azido graphene oxide (RGO-N3) electrodes decorated with the cobaltphthalocyanine complex bearing terminal alkyne moieties (TA-CoPc) was investigated. GCE/RGO-N3/TA-CoPc and GCE/GO-N3/TA-CoPc electrodes were constructed with the electrochemical reduction of GO-N3; TA-CoPc decoration of GCE/RGO-N3 and GCE/GO-N3 electrodes with click electrochemistry (CEC). GCE/RGO-N3/TA-CoPc electrode illustrates well electrocatalytic activity by decreasing the over-potential of the bare electrode about 340 mV and increasing the current density of the electrode about 15 fold at low pHs with absolutely high stability and reproducibility.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Electrocatalyst; Hydrogen evolution reaction; Phthalocyanine; Click electrochemistry; Graphene Oxide; Reduced graphene oxide
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Electrocatalytic hydrogen evolution reaction on reduced graphene oxide electrode decorated with cobaltphthalocyanine
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 188, 5 July 2016, Pages 217–226
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
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