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Nickel Coated Graphite Microparticle Based Electrodes for Carbon Dioxide Reduction in MonoethanolamineMedium
Author(s) -
Filotás Dániel,
Asserghine Abdelilah,
Nagy Tibor,
Asztalos Lilla,
Kovács Ferenc,
Dobránszky János,
Nagy Lívia,
Nagy Géza
Publication year - 2021
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060037
Subject(s) - materials science , dielectric spectroscopy , nickel , chemical engineering , cyclic voltammetry , aqueous solution , raman spectroscopy , electrode , graphite , scanning electrochemical microscopy , electrochemistry , chemistry , composite material , metallurgy , organic chemistry , physics , optics , engineering
A composite electrode that contains home‐made nickel coated carbon micro‐particles as active materials and epoxy binder has been prepared. The surface morphology, elemental composition and size distribution of microparticles were investigated using SEM, EDS, AAS, micro Raman spectroscopy and appropriate seizer apparatus. The prepared micro‐particles appeared monodispers with 33 μm most numerous particle size diameter and with 10.1 w/w % Ni content. Conventional electrochemical methods like impedance spectroscopy and voltammetry as well as scanning electrochemical microscopy (SECM) were used for investigation the properties of the composite electrodes. It has been proved that the electrode can be well used for electro‐catalytic reduction of CO 2 directly in aqueous mono‐ethanol amine (MEA) solution that frequently are applied for capturing it from power plant flue gases. SECM measurements showed that presence of dissolved CO 2 hinders the hydrogen evolution in aqueous MEA solution.