Taymaz Tabari’s research while affiliated with Jagiellonian University and other places

... Therefore, the first idea in designing a new perovskite catalyst can start from the micro-morphology, synthesizing special spatial structures to directly increase the effective contact between active sites and reactants. Three-dimensional ordered macroporous (3DOM) structures, [11][12][13][14][15] with their larger pore diameters, allow soot to penetrate deep into the catalyst interior through gas mass transfer, thus efficiently utilizing the catalyst's active sites. [16,17] In addition, the rich active sites on the porous structure surface can significantly improve the catalyst's ability to adsorb and activate gas molecules (O 2 , NO x ), and the activation of gas molecules into highly active intermediates will help the occurrence of low-temperature deep oxidation reactions of soot particles. ...

Reference:

Optimization of Catalytic Soot Oxidation by 3DOM Perovskite‐Type La0.5‐xKxSr0.5CoO3‐δ Catalysts: Structural Insights and K Substitution

... The development of photocatalysts has made great strides in the past few decades [1][2][3][4][5][6][7][8]. Since 1972, TiO 2 has been used as a photocatalyst for the first time. ...

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Study on the Effect and Mechanism of Hydrothermal Modification on TiO2 Catalysts for CO2 Photo-Thermal Reduction

... Moreover, an increase in the Cu concentration results in an increase in the Co 3+ ionic state, which can facilitate the formation of higher oxidation states, such as Co 4+ , which are believed to be the active species in the OER. The presence of Co 3+ in the catalyst structure leads to the formation of oxyl radicals, which are crucial for the OER mechanism [31][32][33]. However, an increase in the Cu concentration can cause serious agglomeration, which results in smaller electrochemically active surface areas, indicating the availability of a lower number of active sites for the OER. ...

Reference:

Bimetallic Cu–Zn Prussian blue analogue nanoparticles for enhanced oxygen evolution reaction

... Given the redox properties of the adsorbed (metallo)porphyrins and P25, the observed visible light-induced photocurrents may be due to electron transfer from the excited dyes to the TiO 2 conduction band. Tabari et al. recorded the generation of photocurrent when surface-modified TiO 2 remained unchanged under different polarization conditions, whether negative or positive ones [68]. Upon UV irradiation in the studied potential range, pristine TiO 2 generates anodic photocurrents. ...

Reference:

Enhancing Visible-Light Photocatalysis with Pd(II) Porphyrin-Based TiO2 Hybrid Nanomaterials: Preparation, Characterization, ROS Generation, and Photocatalytic Activity

... Consequently, maximum ABPE values were shifted towards higher potentials > 900 mV, and, thus, they were slightly lower. Similar behavior was also found for nanorod-TiO 2 electrodes (measurements performed in 0.5M of NaCl and 0.5M Na 2 SO 4 ) [39], suggesting that the ClER (and possibly other reactions involving Cl-species) is more efficient than the OER at low overpotentials (<1000 mV), independent of the type of photoanode. photocurrent for individual electrodes and all-together connected electrically in parallel (bold line). ...

Reference:

3D-Printed Reactor for Coupling Photoelectrochemical (Sea)Water Splitting with Solid-State H 2 Storage

... The bandgap engineering via introducing defects in the system along with the generation of new states whether occupied or empty within the valence band (VB) and conduction band (CB) is an efficient route to extend the light absorption range of the photocatalyst. At the same time, heterojunction design has been used to increase the cross-section of the light absorption, which can be divided into three categories: type I, type II, and type III [21][22][23]. Among all mentioned ways of engineering the bandgap, surface modification employing organic molecules (dyes) is straightforward and efficient. ...

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Studying the governing factors on the photo(electro)catalytic activity of surface-modified photocatalysts under visible light illumination

... The synthesis of double perovskite/rGO composite involved wet-chemical mixing of as-synthesized double perovskite oxide with graphene oxide (GO), followed by reduction of the GO into rGO via hydrothermal/solvothermal process. The resulting composite material consisted of the rGO dispersed throughout a matrix of double perovskite oxide which provided a highly conductive network for electron transport and ion diffusion [33][34][35][36][37][38][39][40][41][42]. The energy storage potential of the LMFO electrode and its composite have comprehensively been examined to illustrate their performance in supercapacitors. ...

Reference:

Reduced graphene oxide correlated electrochemical energy storage behavior of La2MnFeO6/rGO composite microspheres

... Microwave-prepared BiFeO 3 and LaFeO 3 were examined for their photoelectrochemical properties. LaFeO 3 showed stronger water splitting than BiFeO 3 because of the Jahn-Teller distortion, which leads to charge separation [64]. Kim and his coworkers investigated the Fe doping in Co-based Perovskite oxide and explored its catalytic activity towards oxygen evolution reaction in alkaline media. ...

Reference:

A Review on Synthesis, Properties, and Environmental Application of Fe-Based Perovskite

... Solar energy harvesting and utilization have paramount importance in the sustainable development and replacement of fossil fuels [1][2][3][4]. More importantly, the cost-effective and environmentally benign methods are well-appreciated to be employed in solar energy harvesting [5][6][7]. ...

Reference:

Studying the governing factors on the photo(electro)catalytic activity of surface-modified photocatalysts under visible light illumination

... Besides the methods mentioned above, Ball milling is also a simple physical process that can reduce the particle size of conventionally synthesized perovskites to the nanometer scale. However, this method often leads to high power consumption and typically results in perovskite nanomaterials with irregular shapes, contaminants, or amorphous components [70,110] In addition, researchers have successfully fabricated perovskite nanostructures using various other methods, including combustion synthesis [111,112], microwave-assisted method [113], pulsed laser deposition [114,115], chemical vapour deposition [116], and others [117][118][119]. The comparison of advantages and disadvantages of synthesis methods for perovskite oxides is presented in Table 1. ...

Reference:

Progress in Perovskite Oxide Electrocatalysts for Efficient Hydrogen and Oxygen Evolution Reactions