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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00473696" target="_blank" >RIV/61388955:_____/17:00473696 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/17:00473696 RIV/61389013:_____/17:00473696 RIV/00216208:11310/17:10360087

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jcis.2017.03.096" target="_blank" >http://dx.doi.org/10.1016/j.jcis.2017.03.096</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcis.2017.03.096" target="_blank" >10.1016/j.jcis.2017.03.096</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Colloid and Interface Science

ISSN

0021-9797

e-ISSN

—

Svazek periodika

499

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

138-144

Kód UT WoS článku

000400952600016

EID výsledku v databázi Scopus

2-s2.0-85016507638