Title

Chitosan coated copper-oxide nano particles: a novel electro-catalyst for CO2 reduction

Authors

Authors

S. Basumallick;S. Santra

Comments

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Abbreviated Journal Title

RSC Adv.

Keywords

AQUEOUS HYDROGENCARBONATE SOLUTION; ELECTROCHEMICAL REDUCTION; CARBON-DIOXIDE; ELECTROREDUCTION; Chemistry, Multidisciplinary

Abstract

We report here a simple one-pot method for the synthesis of copper-oxide based novel film forming electro catalysts for CO2 reduction. Water dispersible chitosan (CS)-CuO/Cu2O (CuxO) nano composites of diameter 10-20 nm were obtained by hydrothermal reactions of CS, CuSO4 center dot 5H(2)O and tartaric acid (TA). Here, TA acts as a multifunctional reagent as de-polymerizer of CS, ionic cross linker of depolymerised CS and complex forming ligand with Cu2+ ions. These CS coated CuxO nanoparticles were characterized by HRTEM, UV-VIS, AFM, FTIR and XPS. An ultra thin film of composite catalyst was deposited onto a Pt electrode by drop cast techniques and applied to study CO2 reduction by cyclic voltammetric techniques. The voltammogram shows a reduction peak at -0.665 V vs. RHE at pH 5.3 with a short hydrogen evolution tail indicating its better performance in terms of retarding the H-2 evolution reaction. This has been explained proposing a model of protonated CS on the electrode surface that repels incoming H+ ions at the electrode-electrolyte interface. This is the first time a film forming copper-oxide based nano composite material for efficient electro-catalytic reduction of CO2 in aqueous solution has been reported.

Journal Title

Rsc Advances

Volume

4

Issue/Number

109

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

63685

Last Page

63690

WOS Identifier

WOS:000345702900012

ISSN

2046-2069

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