Pavel Markov

Pavel Markov
Bulgarian Academy of Sciences | BAS · Institute of General and Inorganic Chemistry

PhD

About

22
Publications
20,694
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
213
Citations
Citations since 2016
15 Research Items
207 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040

Publications

Publications (22)
Article
This study reports an effective approach to improve dramatically the electrochemical performance of nanosized NaFePO4 with a maricite structure, which is commonly considered as electrochemically inactive due to the absence of structural channels for alkaline ions mobility. The approach is based on the complete oxidation at mild conditions (i.e. at...
Article
The integration of sodium ion batteries into large‐scale energy storage systems will become feasible in the case when their performance becomes less sensitive towards the ambient temperature. Herein, we demonstrate firstly the elaboration of the oxide‐based electrode material with optimized layered structure and composition that is designed to work...
Article
New and complex results on catalytic activity, thermal stability, effect of H 2 O and SO 2 on the Pd/La 2 O 3 -CeO 2 -Al 2 O 3 model system in methane combustion have been obtained. The catalyst characterization has been made by N 2 - physisorption, XRD, SEM/EDX, HRTEM, XPS, TPD, TPR and FTIR methods. The observed high activity is related to the st...
Article
Palladium containing nickel–iron–cobalt perovskite catalysts La(Co0.8Ni0.1Fe0.1)1−xPdxO3 with x = 0.05 and 0.15 were synthesized at 600 °C from citrate precursors obtained by freeze-drying. Structural and morphological characterization was carried out by XRD, B.E.T. surface measurements, TEM and XPS. The reduction properties of catalysts were exami...
Article
The present contribution provides new structural and spectroscopic data on the formation of solid solutions between hydrated and dehydrated sulfate salts of sodium-nickel and sodium-manganese in a whole concentration range: Na2Ni1-xMnx(SO4)2∙yH2O, 0 ≤ x ≤ 1.0. Using powder XRD, electron paramagnetic resonance spectroscopy (EPR), IR and Raman spectr...
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
Full-text available
In this paper, we report a novel route to obtain LiVMoO6 nanocrystals using a soft mechanochemical synthesis method. Powder X-ray diffraction, infrared, and Raman data indicated the formation of a single-phase LiVMoO6 with brannerite-type structure after 60-min milling time. The average particles size of the obtained LiVMoO6, derived from transmiss...
Conference Paper
The present investigation deals with the sol-gel synthesis and optical characterization of gels in the binary TiO2 - TeO2 system. Titanium butoxide and telluric (VI) acid (H6TeO6) were used as main precursors for preparation of the rich in TiO2 (above 35 mol %) compositions. The heat treated up to 300 degrees C gels are predominantly amorphous and...
Article
The WGS activity of gold catalysts on ceria doped with Pr (5 and 10 at% Pr) was studied. The supports were synthesized by impregnation (IM) and microemulsion (ME) method. Gold (3 wt%) was introduced by deposition-precipitation method. The samples were characterized by means of XRD, TEM, XPS and TPR measurements. The catalytic activity in WGSR of fr...
Article
Full-text available
An anatase nanotube array has been prepared with a special morphology: two concentric walls and a very small central cavity. The method used here to achieve the double-wall structure is a single-step anodization under a voltage ramp. Thanks to this nanostructure, which is equivalent to a fractal electrode, the electrochemical behaviour is improved,...
Article
Full-text available
Graphene has attracted scientific interest in recent years due to its unique properties. Reduced graphene oxide (RGO) was prepared by chemical oxidation of purified natural graphite to obtain graphite oxide then the material was exfoliated to reduced graphene nanosheets by ultrasonication and reduction process using sodium borohydride (NaBH4). The...
Article
Full-text available
Hybrid materials, synthesized by the sol-gel method, were used as matrices for immobilization of bacterial cells, producers of the enzyme nitrilase. Different methods were employed for structure investigations of the synthesized hybrids: Fourier transform infrared spectroscopy (FT-IR), BET and atomic force microscopy (AFM). Тhe influence of the str...
Article
Full-text available
The possibilities and limitations of high resolution radial viewing 40.68 MHz inductively coupled plasma optical emission spectrometry (ICP - OES) were shown in the determination of As, Zn, Pt, B, Hg, Cd, Tl and U in environmental materials. Improvement of the detection limits was achieved by optimization of the operating conditions. The lowest det...
Article
Full-text available
Self-compacting concrete is the new generation composites, characterized with high filling and passing ability, as well as high resistance to segregation. The flexibility and spreading without external vibrations make these materials prefered for producing tense elements. Powder additives and chemical admixtures play an important role for structura...

Network

Cited By