Počet záznamů: 1  

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

  1. 1. 0473696 - UACH-T 2018 RIV US eng J - Článek v odborném periodiku
    Schneiderová, Barbora - Demel, Jan - Zhigunov, Alexander - Bohuslav, Jan - Tarábková, Hana - Janda, Pavel - Lang, Kamil
    Nickel-cobalt hydroxide nanosheets: Synthesis, morphology and electrochemical properties.
    Journal of Colloid and Interface Science. Roč. 499, AUG (2017), s. 138-144. ISSN 0021-9797
    Institucionální podpora: RVO:61388980 ; RVO:61389013 ; RVO:61388955
    Klíčová slova: Hydroxide nanosheets * Delamination * Exfoliation * Layered nickel hydroxide * Layered cobalt hydroxide * Electrode material
    Kód oboru RIV: CA - Anorganická chemie; CF - Fyzikální chemie a teoretická chemie (UFCH-W); CD - Makromolekulární chemie (UMCH-V)
    Obor OECD: Inorganic and nuclear chemistry; Physical chemistry (UFCH-W); Polymer science (UMCH-V)
    Impakt faktor: 5.091, rok: 2017

    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.
    Trvalý link: http://hdl.handle.net/11104/0270849