Sonya Harizanova

Sonya Harizanova
Bulgarian Academy of Sciences | BAS · Institute of General and Inorganic Chemistry

PhD

About

12
Publications
1,785
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
166
Citations
Citations since 2016
5 Research Items
101 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025

Publications

Publications (12)
Article
To outline the role of dual-ion intercalation chemistry to reach sustainable energy storage, the present review aims to compare two types of batteries: widely accepted dual-ion batteries based on cationic and anionic co-intercalation versus newly emerged hybrid metal-ion batteries using the co-intercalation of cations only. Among different charge c...
Article
Full-text available
The common approach to modify the thermoelectric activity of oxides is based on the concept of selective metal substitution. Herein, we demonstrate an alternative approach based on the formation of multiphase composites, at which the individual components have distinctions in the electric and thermal conductivities. The proof-of-concept includes th...
Article
Full-text available
Elaboration of Pd-supported catalysts for catalytic combustion is, nowadays, considered as an imperative task to reduce the emissions of methane. This study provides new insight into the method of deposition, chemical state of Pd and oxygen storage capability of transition metal ions and their effects on the catalytic reactivity of supported cataly...
Article
Full-text available
Sodium manganese phospho-olivine, NaMnPO4, is considered to be a higher-voltage alternative to the presently used iron-based electrode material, NaFePO4, for sodium ion batteries. Irrespective of this advantage, the electrochemical performance of NaMnPO4 is still far from what is desired. Herein we provide the first report on the storage performanc...
Article
Full-text available
The present contribution provides new data on the effect of multiple metal substitutions for A- and B-perovskite sites on the thermoelectric properties of LaCoO3-based ceramics. Two groups of perovskite comopositions are studied: double substituted cobaltates with general formula LaCo0.8M0.1M’0.1O3 (M0.1M’0.1 º Ni0.1Fe0.1, Ni0.1Ti0.1, Mn0.1Fe0.1) a...
Article
LaCoO3 displays a high Seebeck coefficient that makes it a potential candidate for future thermoelectric applications. In this study we provide data on the improvement of the thermoelectric efficiency of LaCoO3 by double substitution with nickel and iron. The improvement is achieved by balancing the opposite effects of nickel and iron ions. Double-...
Article
Nickel and iron substituted LaCoO3 with rhombohedrally distorted perovskite structure were obtained in the temperature range of 600-900 °C by thermal decomposition of freeze-dried citrates and by the Pechini method. The crystal structure, morphology and defective structure of LaCo1-xNixO3 and LaCo1-xFexO3 were characterized by X-ray diffraction and...
Article
Nanosized aluminum tungstate, Al2(WO4)3, is prepared by a precipitation reaction between Na2WO4 and Al(NO3)3. The structure of the precipitated composition is determined by powder XRD analysis, IR and 27Al MAS NMR spectroscopy. The thermal properties are examined by DSC, DTA and TG analyses combined with gas evolved analysis. Particle sizes and mor...
Article
The effect of the synthesis route on the microstructure and reducibility of lanthanum cobaltates (LaCoO3) perovskites was examined. Two synthesis methods were used: thermal decomposition of freeze-dried La–Co-citrates and the Pechini method. The crystal structure, morphology and defect structure of LaCoO3 were characterized by XRD powder diffractio...
Article
The distribution of Ni in LaNiy Co1–yO3 solid solutions was examined by means of EPR spectroscopy. For the assignment of the EPR signals, La1–xSrx CoO3 oxides were used as reference for Co3+–Co4+ magnetic clusters. For the oxides heated at 600 °C, the EPR spectra of LaNiy Co1–yO3 consist of a signal due to magnetic Ni clusters, while the oxides pre...
Article
Two methods for the preparation of LaCoO3 samples were used: thermal decomposition of La–Co citrate precursors obtained by freeze-drying of the corresponding solutions and by a solid state reaction. Microstructural characterization was made by electron paramagnetic resonance spectroscopy (EPR). For assignment of the EPR signals, La1−xSrxCoO3 sample...

Network

Cited By