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Nickel-cobalt hydroxide nanosheets: Synthesis, morphology and electrochemical properties

SYSNO ASEP	0473696
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Nickel-cobalt hydroxide nanosheets: Synthesis, morphology and electrochemical properties
Author(s)	Schneiderová, Barbora (UACH-T)_SAI Demel, Jan (UACH-T)_{SAI, RID, ORCID} Zhigunov, Alexander (UMCH-V)_{RID, ORCID} Bohuslav, Jan (UFCH-W) Tarábková, Hana (UFCH-W)_{RID, ORCID} Janda, Pavel (UFCH-W)_{RID, ORCID} Lang, Kamil (UACH-T)_{SAI, RID, ORCID}
Source Title	Journal of Colloid and Interface Science. - : Elsevier - ISSN 0021-9797 Roč. 499, AUG (2017), s. 138-144
Number of pages	7 s.
Language	eng - English
Country	US - United States
Keywords	Hydroxide nanosheets ; Delamination ; Exfoliation ; Layered nickel hydroxide ; Layered cobalt hydroxide ; Electrode material
Subject RIV	CA - Inorganic Chemistry
OECD category	Inorganic and nuclear chemistry
Subject RIV - cooperation	J. Heyrovsky Institute of Physical Chemistry - Physical ; Theoretical Chemistry Institute of Macromolecular Chemistry - Macromolecular Chemistry
Institutional support	UACH-T - RVO:61388980 ; UMCH-V - RVO:61389013 ; UFCH-W - RVO:61388955
UT WOS	000400952600016
EID SCOPUS	85016507638
DOI	10.1016/j.jcis.2017.03.096
Annotation	This paper reports the synthesis, characterization, and electrochemical performance of nickel-cobalt hydroxide nanosheets. The hydroxide nanosheets of approximately 0.7 nm thickness were prepared by delamination of layered nickel-cobalt hydroxide lactate in water and formed transparent colloids that were stable for months. The nanosheets were deposited on highly oriented pyrolytic graphite by spin coating, and their electrochemical behavior was investigated by cyclic voltammetry in potassium hydroxide electrolyte. Our method of electrode preparation allows for studying the electrochemistry of nanosheets where the majority of the active centers can participate in the charge transfer reaction. The observed electrochemical response was ascribed to mutual compensation of the cobalt and nickel response via electron sharing between these metals in the hydroxide nanosheets, a process that differentiates the behavior of nickel-cobalt hydroxide nanosheets from single nickel hydroxide or cobalt hydroxide nanosheets or their physical mixture. The presence of cobalt in the nickel-cobalt hydroxide nanosheets apparently decreases the time of electrochemical activation of the nanosheet layer, which for the nickel hydroxide nanosheets alone requires more potential sweeps.
Workplace	Institute of Inorganic Chemistry
Contact	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Year of Publishing	2018

Number of the records: 1