Registration Number
0217U000983,
0115U002224
, R & D reports
Title
Electrochemistry of nanostructured thin films based on alloys of Sn with 3d7-9 elements and Ni-Re alloy
popup.stage_title
Head
Kublanovsky Valery Semonovich, Доктор хімічних наук
Registration Date
27-03-2017
Organization
V.I.Vernadskii Institute of General and Inorganic Chemistry NASU
popup.description2
Report: 107 pages,.1 book, 33 figures, 3 tables, 139 references, Key words: electroreduction, electrochemistry active complexes, electrocatalysis, electrocatalysts, functional lectroplating. Aim of the work. Electrochemical synthesis of nanostructured nickel-rhenium, tin-nickel and tin-copper alloys from mixed-ligand electrolytes and investigation of their electrochemical, electrocatalytic and corrosion properties; creation on this basic of electrocatalysts for the oxidation of ethanol and reduction-oxidation of hydrogen, anode materials for lithium ion batteries (LiBs); development of electrocatalysis theory. Nanostructured bifunctional electrocatalysts for the reduction of hydrogen and oxidation of alcohol: nickel-rhenium, nickel-tin and tin-copper alloys have been synthesized from sulfamate, citrate and mixed-ligand citrate-pyrophosphate electrolytes. The structure and corrosion properties of the obtained deposits have been investigation. The qualitative, quantitative and phase composition of alloys have been studied. The main laws governing the influence of the conditions and mechanism of the electrochemical synthesis (induced and combined) of nickel-rhenium alloys on the qualitative, quantitative and phase composition of the obtained deposits have been established. The chemical composition, surface morphology, structure and electrochemical characteristics of polymetallic nickel-rhenium coatings electrodeposited from a sulfamate and a citrate electrolyte have been investigated. The electrochemical characteristics of alloys, obtained by classical and induced deposition, in hydrogen reduction and ethanol oxidation reaction in alkaline and acid electrolytes of full cells have been investigated. A synergistic and a spillover effect at electrodes with nanostructured surface have been established. The interrelation between electrocatalytic properties and corrosion behavior and the percentage of the electrophilic and nucleophilic components of alloys obtained under induced electrodeposition conditions has been studied. The performance stability and degradation of electrocatalysts have been studied. Electrolytic tin-nickel alloys as the anodes of LiBs have been investigated by potentiodynamic and galvanostatic cycling methods. For nickel-rhenium alloys electrodeposited from citrate electrolytes, their high electrocatalytic activity and the stability of obtained coatings in the processes of ethanol oxidation in 1M KOH have been shown. It has been shown that the limiting ethanol oxidation current increases with increase in ethyl alcohol concentration to 2 mol/L, above which a change in the transport mechanism of depolarizer or reaction products probably takes place. It is proposed to use, as an alternative to carbon materials, tin-containing composite coatings, such as tin alloys of such metals as nickel and copper, which have a high specific capacity (730 mAh/g), making them promising for use as anodes in LiBs.
Product Description
popup.authors
Берсірова Оксана Леонідівна
Бик Сергій Володимирович
Молодід Галина Василівна
Нікітенко Василь Миколайович
Нечипорчук Сергій Вікторович
Японцева Юлія Сергіївна
popup.nrat_date
2020-04-02
