Nano-sized Catalysts Research Articles

Metal Composite Nano-Catalyst Enhanced Solid Oxide Fuel Cell Anodes for Improved Performance and Stability with Hydrocarbon Containing Fuels

Implementation of nano-catalyst materials into solid oxide fuel cell (SOFC) electrodes to improve performance and stability has been widely studied. Addition of the nano-catalysts into an electrode structure serves to enhance the electrochemical performance of the SOFC by increasing the Triple Phase Boundary (TPB) area, improving redox stabilization, and modifying reaction kinetics of hydrocarbon gasses that cause anode degradation due to carbon deposition.SOFCs operating upstream of a reformer need to exhibit good tolerance to any hydrocarbon components that may make their way to the stack. Typical Ni-based cermet anodes suffer from anode deactivation due to carbon build up under hydrocarbon flows. Carbon builds up and covers the TPB area which results in poor electrochemical performance. Larger carbon deposits can block pores within the anode microstructure which leads to gas diffusion issues. Carbon buildup also causes mechanical stresses to the electrode due to volumetric changes which can lead to fracture and complete failure of the cell.This work studied nano-catalyst decoration of the Ni-based cermet anodes with catalysts that promote internal reforming to protect against coking. Addition of active metal components (such as Co, Ge, Sn), and ceramic reforming promoters (such as CeO2, MgO) were investigated. Multi-component systems with several catalysts were also examined.Uniform incorporation of nano-catalyst into the anode microstructure was achieved through a patented liquid phase surfactant assisted process (using various catechol surfactants). Deposition loading densities and distribution of nanoparticles was controlled by altering the surfactant and catalyst solution concentrations.Nano-catalyst depositions were characterized through Scanning Electron Microscope (SEM) for imaging, Atomic Force Microscopy (AFM) for topographical analysis, and Energy-Dispersive X-ray Spectroscopy (EDS) for chemical characterization. Figure 1 shows SEM imaging of nano catalyst distribution of cerium oxide (CeO2) and cobalt oxide (CoO) co-deposition within an anode structure. A uniform distribution of nano-sized catalyst materials is observed.Accelerated evaluation of nano-catalysts for SOFCs was completed through symmetrical anode tests, where a symmetrical anode cell was subjected to hydrocarbon impurity at SOFC operating temperatures and electrochemical impedance spectroscopy (EIS) characterization was done over time. The best catalyst systems were down selected and long-term SOFC tests were completed with current-voltage-power (I-V-P) and EIS evaluation. Post-mortem microstructure and chemistry characterizations were also used in analysis.Uniform nano catalyst distribution of CeO2 and CoO within the anode structure demonstrated greater than 50% sustained improvement in harsh environment, long-term tests where the cell was subjected to 40% CH4 for 50+ h. Figure 1

Microwave-assisted biodiesel production using ZIF-8 MOF-derived nanocatalyst: A process optimization, kinetics, thermodynamics and life cycle cost analysis

In this study a novel, high surface area, and recyclable nano-size solid basic catalyst is developed for the first time from ZIF-8 MOF-derived CaO/ZnO for the high-yielding transesterification of soybean oil (SO) to biodiesel with methanol under microwave irradiation. The chemical composition, texture and morphology of the catalyst were comprehensively characterized by FT-IR, SEM-EDS, XRD, TGA, XPS and BET. In addition, 1H NMR analyses were performed to confirm the conversion of soybean oil to biodiesel, whereas, GC–MS spectrum provide information about the chemical composition of the produced biodiesel. Kinetic studies are performed for the optimized catalyst and it follows the pseudo-first-order reaction. Thermodynamic analyses show that the transesterification of soybean oil to biodiesel reaction is endothermic and not spontaneous. By using Response surface methodology (RSM), the optimization of parameters that affect the biodiesel yield is studied. The transformation of 1:20 soybean oil with methanol using CaO/ZnO catalyst (7 wt%) gives 97.4 % biodiesel yield for the transesterification at 90 °C for 50 min. The catalyst shows good reusability after 5 successive cycles demonstrating its industrial-scale applications. According to Life cycle cost analysis (LCCA) the estimated price of 1 kg of biodiesel produced in this work is merely $1.11 showing high commercial applicability.

An expeditious synthesis and histo–toxicological study of 1,2,3‐triazoles catalyzed by a novel Fe3O4@SiO2‐Pr‐Thiosemicarbazide‐Cu(II) as a magnetically separable catalyst

A novel Fe3O4@SiO2‐Pr‐Thiosemicarbazide‐Cu(II) as a magnetically separable catalyst was synthesized and further confirmed by FT‐IR, TGA, XRD, FE‐SEM, EDX, ICP‐AES, TEM, VSM, and XPS analyses. The catalytic efficiency of Fe3O4@SiO2‐Pr‐Thiosemicarbazide‐Cu(II) was examined in the one‐pot environmentally friendly synthesis of 1,2,3‐triazoles by reacting terminal alkynes, alkyl halides, and sodium azide in ethanol at 55°C. The results revealed Fe3O4@SiO2‐Pr‐Thiosemicarbazide‐Cu(II) nano–sizedcatalyst is advantageous in terms of excellent activity, high stability, and easily recoverable in the synthesis of 1,2,3‐triazoles. The mechanistic study of Fe3O4@SiO2‐Pr‐Thiosemicarbazide‐Cu(II) catalyzed synthesis of 1,2,3‐triazole is also supported by DFT calculations. The significant advantages of this catalytic system are mild reaction conditions, easy work‐up procedure, magnetic separation, heterogeneity, an excellent yield of the product, and recyclability without a notable decrease of catalytic potency for six runs. Further, histotoxicological assessment of synthesized 1,2,3‐triazoles was done on the Indian major carp Labeo rohita.

Insights into dynamic evolution of surface oxidized Pd clusters for efficient hydrogen peroxide production

The direct synthesis of H2O2 from H2 and O2 involves the structural evolution of nano-sized catalyst during highly exothermic process, ultimately resulting in catalyst deactivation. The mechanism of catalyst structural evolution and its impact on the catalytic performance were elucidated by combining theoretical calculations with experimental characterizations. Through theoretical calculations, the dynamic evolution of surface-oxidized Pd12 clusters loaded on graphene (Pd12@G) during the reaction process was demonstrated. Different oxygen concentrations and reactants can lead to the evolution of the catalyst and consequently to the changes in catalytic activity. The relaxed Pd12@G with a doped O atom exhibits an ultra-low reaction energy of ∼ 0.20 eV for H2O2 production. The experimental findings also confirm the dynamic variation of the palladium oxide catalyst during the reaction. This work provides a microscopic understanding of the complex catalyst-reactant interaction, and casts helpful insights into the catalyst deactivation during the synthesis of hydrogen peroxide.

Strong NiOx and ZrO2 interactions to eliminate the inhibiting effect of trace oxygen for propane dehydrogenation by accelerating lattice oxygen releasing

Recently, the ZrO2-based catalysts for PDH exhibited high activity owing to the formation of oxygen vacancy and coordinatively unsaturated Zr (Zrcu) sites. However, industrial C3H8 raw gases typically contain trace amounts of oxygen at 10–1000 ppm, which can significantly decrease the PDH activity of nano-sized ZrO2 catalyst, because that oxygen vacancy can be filled by the O2 molecules rapidly, while the rate of lattice oxygen consumption is relatively slow. Here, highly dispersed NiOx species loading on ZrO2 significantly increased C3H6 formation rate (up to 6.6 times) and decreased the activation energy. The strong interaction between NiOx species and ZrO2 enhances the ability of ZrO2 to release its lattice oxygen, and increases the concentration of oxygen vacancy and unsaturated Zr-O acid-base pairs for PDH. This strategy can expand to other metal oxides interacted with ZrO2 to eliminate the inhibiting effect of trace oxygen, such as GaOx, CoOx, CrOx, LaOx, and InOx.

Green and facile synthesis of nanostructured Co3O4/CeO2 catalysts via a glucose-urea method for NO oxidation

Nanocatalysis plays an important role in chemical industrial production, environmental protection and etc. However, traditional catalyst preparation methods are generally labor-intensive, time-consuming and need high-temperature calcination, which are not conducive to the preparation of nanostructured catalyst. Therefore, developing a green and facile method for nano-sized catalyst preparation is very significative. In this work, a series of nano-sized Co3O4/CeO2 catalysts with high specific surface area, high oxygen storage and homogeneous distribution of active species were synthesized via a glucose-urea (G-U method), and applied in NO oxidation The NO oxidation performance indicates that the 12.5% CoCeG−U catalyst prepared by the G-U method shows higher activity than those of catalysts prepared by the traditional methods (precipitation, hydrothermal and impregnation methods). The characterization results revealed that the CoCeG−U catalysts have the highest specific surface area, pore volume, content of surface Ce3+ and Co3+ among the catalysts. Moreover, the nano Co3O4 is better dispersed on CeO2, which resulted in more active oxygen species on the surface of the catalysts prepared by the G-U method. Herein, the higher specific surface area, the smaller Co3O4 nanoparticles, the more active oxygen species and the higher Ce3+ and Co3+ contents of the CoCeG−U catalyst lead to the more excellent NO oxidation performance. This work provides a green and efficient approach for the industrial production of nano-sized oxide catalysts.

Influence of Reaction Temperature on Yields of Multi-Walled CNTs Synthesized with Fe-Co/Al<sub>2</sub>O<sub>3</sub> Bimetallic Nanocatalyst

Aluminum-supported iron and cobalt (Fe-Co/Al2O3) bimetallic nano-sized catalyst has been synthesized by the sol-gel method. The average diameter of the Fe-Co/Al2O­3 catalyst was measured to be around 7 nm from SEM images. EDX measurements revealed that Fe-Co/Al2O­3 consists of 59.98% of Al, 20.00% of Fe, and 20.02% of Co by atomic weight. Multi-walled carbon nanotubes (MWCNT) were prepared with as-synthesized nanocatalyst from a commercial butane gas by the CCVD method at different reaction temperatures. TEM and XRD measurements revealed that Fe-Co/Al2O3 bimetallic nano-sized catalyst is beneficial to fabricating MWCNTs by the CCVD method. The highest yield of MWCNTs was obtained at 690°C.

An Experimental Study on the Emission Characteristics in CI Engine using Nano Particle Coated Catalytic Converter

A proven viable technology to reduce vehicular exhaust gas emission is the catalytic converter. Although catalyst converters are an effective and efficient method to react to certain pollutants, they are expensive due to the use of noble metals like palladium, platinum and rhodium. Various research has been carried out to find a viable alternative to the noble metal catalyst that can react over vehicular pollutants such as oxides of nitrogen (NOx), carbon monoxide (CO), unburnt hydrocarbon (UBHC) and particulate matter (PM) emitted by the combustion of hydrocarbon burnt internal combustion engine. This paper investigates the emission characteristics of a nano-particle-coated catalytic converter in a conventional fossil-fuelled compression ignition engine. The catalyst used in the research is a nano-particle of metal oxides such as aluminium oxide (nano-sized Al2O3) particle and titanium oxide nano-sized (TiO2) particle. This catalyst is less expensive compared to a noble catalyst. Experiments were made on a single cylinder four strokes water-cooled diesel-fuelled compression ignition engine with a catalytic converter coated with alternative nano-particles. The exhaust gas was allowed to pass through the nano-sized catalyst deposited over the honeycomb structure of the substrate of the catalytic converter and the emission was measured using a five-gas analyser. The result showed a decreased level of oxides of nitrogen.

N/C doped nano-size IrO2 catalyst of high activity and stability in proton exchange membrane water electrolysis

It is highly desirable to synthesize and deploy low-cost and highly efficient catalysts for the oxygen evolution reaction (OER) to catalyze water splitting. We show that N/C doped amorphous iridium oxide combines the benefits of nano-size (approximately 2 nm), which results in exposure to large active surface areas and features of oxygen defects, which make for an electronic structure suitable for the OER. Systematic studies indicate that the OER activity of the iridium oxide catalyst is accelerated by the effect of the structure and chemical state of the iridium element. Remarkably, the N/C doped amorphous iridium oxide catalyst shows a lower cell voltage of 1.774 V at 1.5 A cm−2, compared with IrO2 (1.847 V at 1.5 A cm−2), and it can maintain such a high current density for over 200 h without noticeable performance deterioration. This work provides a promising method for the improving OER electrocatalysts and the construction of an efficient and stable PEM water cracking system.

Transformations of Pd/(N-Heterocyclic Carbene) Molecular Complexes into a Nanosized Catalyst System in the Mizoroki–Heck Reaction

Transformations of Pd/(N-Heterocyclic Carbene) Molecular Complexes into a Nanosized Catalyst System in the Mizoroki–Heck Reaction

Upotreba sondi cink dioksida za praćenje biološke i hemijske kontaminacije vode u civilne i vojne svrhe

Mainly organic pollutants, and their random wide application threatens human health and ecosystems. It is clear that detoxifying toxic insecticides from aquatic systems remains a global priority. In this study, a zinc oxide nanocatalyst with suitable properties was synthesized to achieve complete degradation of some insecticides from aqueous media. ZnO catalyst was used in normal and nano size as part of an advanced oxidation process in the presence of H2O2 and UV rays. The complete detoxification of the tested pesticides after treatment with the most effective process (ZnO(s)/H2O2/UV) was then investigated by biochemical treatment research. The effect of ZnO water treatment was also investigated. Interestingly, this study reported that the degradation rates of the investigated insecticides were faster using nano-sized ZnO catalysts than plain ZnO catalysts as well as zinc dioxide probes. In this sense, complete decomposition of the investigated insecticides (100%) in the ZnO(s)/H2O2/UV system was achieved after 320 min of irradiation. Water treatment with zinc oxide nanocatalyst improved the quality of water parameters. Together, the advanced oxidation processes using ZnO nanocatalyst can be considered as a promising treatment technology for the complete detoxification of methomyl and dimethoate in water. However, further research is warranted to identify potential breakdown products.

Catalytic evaluation of cellulose pyrolysis by using nanosized metal oxide catalysts.

In this study, effects of TiO2 and ZnO nanometal oxides on cellulose pyrolysis have been investigated. Both catalysts have been synthesized via hydrothermal method and characterized by using different techniques. Catalytic and catalyst-free experiments were carried out so as to identify the catalytic abilities of synthesized nanoparticles. Catalyst-free experiments were carried out at 500, 600, and 700 °C in order to determine the optimal condition for pyrolysis and it was found as 700 °C. Optimum catalyst ratio for cellulose pyrolysis was found as 5% (w/w) for both TiO2 and ZnO catalysts. GC-MS and micro-GC analyses were conducted in order to examine the catalytic properties of synthesized nanoparticles and illuminate the content of pyrolytic oil and gaseous products. Results showed that maximum gas yield was observed at 700 °C in the presence of 5% TiO2. Maximum activity for both catalysts was observed at 700 °C and the char yield was significantly decreased in each catalytic experiment at specified temperatures, compared to catalyst-free experiments. Both nanoparticles catalyzed the dehydration and decarbonylation reactions and significantly increased the amount of furan derivatives, especially furanic aldehydes.

Nano-sized and microporous palladium catalyst supported on modified chitosan/cigarette butt composite for treatment of environmental contaminants

This study reports a versatile process for the fabrication of a microporous heterogeneous palladium nanocatalyst on a novel spherical, biodegradable, and chemically/physically resistant catalyst support consisting of chitosan (CS) and cigarette waste-derived activated carbon (CAC). The physicochemical properties of the microporous Pd-CS-CAC nanocatalyst developed were successfully determined by FTIR, XRD, FE-SEM, TEM, BET, and EDS techniques. TEM studies showed that the average particle size of the synthesized Pd NPs was about 30 nm. The catalytic prowess of microporous Pd-CS-CAC was evaluated in the reduction/decolorization of various nitroarenes (2-nitroaniline (2-NA), 4-nitroaniline (4-NA), 4-nitrophenol (4-NP), and 4-nitro-o-phenylenediamine (4-NPD)) and organic dyes (methyl red (MR), methyl orange (MO), methylene blue (MB), congo red (CR), and rhodamine B (RhB)) in an aqueous medium in the presence of NaBH4 as the reducing agent at room temperature. The catalytic activities were studied by UV–Vis absorption spectroscopy of the supernatant at regular time intervals. The short reaction times, mild reaction conditions, high efficiency (100% conversion), easy separation, and excellent chemical stability of the catalyst due to its heterogeneity and reusability are the advantages of this method. The results of the tests showed that reduction/decolorization reactions were successfully carried out within 10–140 s due to the good catalytic ability of Pd-CS-CAC. Moreover, Pd-CS-CAC was reused for 5 consecutive times with no loss of the initial shape, size, and morphology, confirming that it was a sustainable and robust nanocatalyst.

Effect of ZSM-5 Particle Size and Framework Silica-to-Alumina Ratio on Hexane Aromatization

Parent ZSM-5 and Ga-modified ZSM-5 catalysts with different Si/Al ratios and particle sizes were prepared. The physicochemical properties of the prepared catalysts were investigated by performing X-ray powder diffraction analysis, BET surface area analysis, and NH<sub>3</sub>-TPD analysis. The performance of the aromatization reaction of the prepared catalysts was evaluated with 1-hexane as a model compound. The zeolite catalysts with a low SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio possessed better activity than those with a high SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio. Ga modification significantly improved the catalyst aromatization selectivity. Through aromatization, the acid sites of Ga-modified nano-sized zeolites promoted the selective conversion of produced olefin to aromatics by removing H-atoms. For the parent ZSM-5 and Ga-modified catalysts, the catalyst stability increased with an increase in the SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> molar ratio. The nano-sized ZSM-5 catalyst with a high SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio exhibited better catalytic stability than the microscale ZSM-5, and the nano-sized catalyst with a low SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio showed very low stability.

“Water-in-Salt” and Nasicon Electrolyte-Based Na-CO2 Battery

Super concentrated electrolytes, referred to as “water-in-salt (WiS) electrolytes”, have been received attention due to their wide electrochemical stability window, cost-effectiveness, and non-flammability. However, the free water molecules present in WiS electrolytes prevent the use of Na-metal as the anode for Na-gas batteries.In this study, we develop a Na-CO2 battery with WiS and Na-super-ionic conductor (NASICON) electrolytes that were used as energy storage cells and CO2 gas utilization. The NASICON separator allowed us to fabricate a hybrid Na-CO2 battery comprising Na metal as the anode material and WiS as the cathode electrolyte without damage of Na metal. Additionally, linear sweep voltammetry (LSV) with corresponding differential electrochemical mass spectroscopy (DEMS) measurements rendered the direct observation of H2 evolution retardation with increasing WiS concentration. Furthermore, we introduced a nano-sized Ru catalyst onto the current collector using Joule heating method for reducing the overpotential gap. Consequently, the Na-CO2 batteries with Ru@carbon current collector reduced the overpotential gap and exhibited a cycling endurance of over 75 cycles.

Metal Supported Solid Oxide Fuel Cells for Ethanol Fueled Vehicles

Porous metal supported solid oxide fuel cells (MS-SOFCs) have been engineered with micro-pores and nano-sized catalysts for directly converting chemical energy in ethanol to electricity. The MS-SOFCs developed at Lawrence Berkeley National Laboratory offer advantages of rapid start-up, mechanical ruggedness, high performance, and low-cost materials. A symmetric metal/ceramic scaffold with micro-pore range of 1 to 25 μm has been fabricated using tape-casting and lamination. Select catalysts were infiltrated in the porous electrodes and metal supports by fast infiltration. Continuous cell performance improvement has been achieved by optimization of cell structure, processing temperature and catalyst compositions. The stability of MS-SOFCs has been evaluated during continuous operation for >300 hours. The degradation mechanisms revealed by electrochemical impedance spectroscopy and high-resolution scanning electron microscopy techniques will be presented. The effect of impurities such as Cr on the cathode stability has been evaluated at an intermediate operating temperature range of 600 to 700°C. The phase change of praseodymium-oxide oxygen reduction catalysts has been identified at low oxygen pressure (such as nitrogen environment) by in situ high temperature X-ray diffraction.

Prospects and State of the Glass Industry in Saudi Arabia and a preliminary assessment of the quality of Glass and Glass-Ceramics Fabrication

Although the economic value of glass products and its importance to the Saudi National Economy is vast, not much information is available about the current state of the art of the industry. Likewise little information is available about the geography, potential sites for mining sand as well as the evaluation of sand quality. This paper attempts to bridge this gap by presenting a feasibility study of fabricating normal glass and glass ceramics from Saudi Arabia’s domestically available raw materials. It discusses the current status of glass industry in Saudi Arabia and the Middle East region. It also gives a brief explanation about the sand topography in Saudi Arabia. In order to determine the feasibility of fabricating glass using these raw materials, experimental data on the fabrication of normal glass and glass-ceramics from indigenously available raw materials was obtained and reported as part of the findings of this paper Firstly, normal transparent glass were able to be fabricated without any apparent large defects using sand collected from Ar-Rayis region in Saudi Arabia. Four nano-sized crystallization catalysts, namely VC, WC, TiC and Y<sub>2</sub>O<sub>3</sub>, were added to the constituents of the glass in 3 wt.%. For VC, the crystallization process was limited. The glass ceramics of WC consisted of multi-dimensional edges crystals which covered all the matrix. Gray crystalline whiskers were obtained by addition of TiC. The Y<sub>2</sub>O<sub>3</sub>- glass ceramics consisted of multi-directionally rosette crystals. Finally, the microhardness values of the added crystallization catalysts glass ceramics were obtained and found to be much higher compared to normal glass. The results show that glass of high quality can be produced specifically for Ar—Rayis region which would be of interest to researchers, glass industry personnel and potential investors

Benzothiazole-Based Palladium Complexes as Efficient Nano-Sized Catalysts for Microwave Hydrothermal Suzuki –Miyaura Cross-Couplings

The paper describes the synthesis of a novel nano-sized phosphine-free benzothiazole-based palladium(II) complexes from easily accessible starting materials and study their efficiency as catalysts for Suzuki Miyaura cross coupling reaction using water as a solvent under microwaves irradiations. Structural elucidation of the novel nano-sized benzthiazole-based complexes was achieved by analytical and physical characterization tools. The catalytic activity of the novel nanocatalysts was invetigated for SMC of aryl halides with arylboronic acids using water as a solvent and under microwaves irradiation conditions as green mild reaction conditions.

Microfluidic-oriented synthesis of enriched iridium nanodots/carbon architecture for robust electrocatalytic nitrogen fixation

Electrocatalytic nitrogen reduction reaction (NRR) is considered as a promising candidate to achieve ammonia synthesis because of clean electric energy, moderate reaction condition, safe operating process and harmless by-products. However, the chemical inertness of nitrogen and poor activated capacity on catalyst surface usually produce low ammonia yield and faradic efficiency. Herein, the microfluidic technology is proposed to efficiently fabricate enriched iridium nanodots/carbon architecture. Owing to in-situ co-precipitation reaction and microfluidic manipulation, the iridium nanodots/carbon nanomaterials possess small average size, uniform dispersion, high conductivity and abundant active sites, producing good proton activation and rapid electrons transmission and moderate adsorption/desorption capacity. As a result, the as-prepared iridium nanodots/carbon nanomaterials realize large ammonia yield of 28.73 μg h−1 cm−2 and faradic efficiency of 9.14% in KOH solution. Moreover, the high ammonia yield of 11.21 μg h−1 cm−2 and faradic efficiency of 24.30% are also achieved in H2SO4 solution. The microfluidic method provides a reference for large-scale fabrication of nano-sized catalyst materials, which may accelerate the progress of electrocatalytic NRR in industrialization field.

STUDY OF AMINOESTERS OF SYNTHETIC PETROLEUM ACID PRODUCED BY AEROBIC OXIDATION OF NAPHTHEN-PARAFFIN HYDROCARBONS, AS CORROSION INHIBITORS

This article presents the results of research in the field of synthesis of amino esters obtained on the basis of mono, di, triethanolamine and synthetic petroleum acid in a molar ratio of 1:1.The structure and structure of the obtained substances were confirmed by IR spectroscopy. The inhibitor-bactericidal effect of amino esterson the corrosion process has been studied. The inhibitory effect of the synthesized amino esters on CO2 steel corrosion at concentrations of 25, 50, and 100 mg/L was studied. Samples T-1, T-2, T-3 at a concentration of 25 mg/l for 20 hours showed an inhibitory effect of 40,36…74,15%, respectively, at a concentration of 50 mg/l, respectively 79,96…92,04 %, at a concentration of 100 mg/l, respectively, 98,09…99,59%. In order to study the antimicrobial activity of the obtained amino esters, their solutions were prepared in various media (isopropyl alcohol 60%) at five different concentrations (5; 50; 500; 600; 700 mg/l) and their effect on the vital activity of sulfate-reducing bacteria (SRB) was studied at 30…32 °C for 15 days. It has been established that at a concentration of 600 mg/l, the synthesized amino esters exhibit a 95,2…100% bactericidal effect, and at a concentration of 700 mg/l, they exhibit a 100% bactericidal effect, completely suppressing the vital activity of bacteria. The synthesized complexes exhibit a higher bactericidal effect even at low concentrations. Thus, the bactericidal and CO2-corrosion-inhibiting properties of amino esters synthesized on the basis of synthetic petroleum acid obtained in the process of aerobic oxidation of paraffin-naphthenic hydrocarbons isolated from the diesel fraction (boiling range 190…330 °C) in the presence of transition-metal-modified nanosized γ-Al2O3 catalyst, and ethanolamines.