Bimetallic PdAg Nanoparticles Research Articles

Photo-catalytic dye degradation potentials of Ag-Pd bimetallic nanoparticles synthesized from Vitex negundo.

Plant extracts are a great alternative to synthesizing nanoparticles of different metals and metal oxides. This green synthesis method has opened up numerous possibilities in various scientific domains. In present study, Leaf extract from Vitex negundo is a non-deciduous, long-lasting shrub from the Verbenaceae family is used as capping and reducing agents for the synthesis of silver and palladium nanoparticles. The characterization study UV-vis spectrophotometer analysis showed absorbance value around 320nm which confirming that Ag-Pd nanoparticles have been successfully obtained. Further, SEM is used to investigate the morphology of Ag-Pd NPs, which revealing their spherical and rod-like configuration, aggregation, and the size of the particles are obtained between 50 and 100nm. The successful synthesis of Ag-Pd NPs was further confirmed by the EDAX chart, which displayed the peak of Ag and Pd at bending energies between 0.5 and 1.5keV. According to the quantitative study, Ag and Pd ions found about 5.24 and 13.28%, respectively. In addition, surface studies with TEM confirming that synthesized Ag-Pd NPs are predominates with spheres structure morphologies, with sizes averaging 11.20nm and ranging from 10 to 20nm. Further, Ag-Pd nanoparticles was applied as potential photocatalyst materials to degrade methylene blue dye and found about 85% of the degradation efficiency within 150min of the sunlight exposure thus could be used as catalyst to removal of hazardous organic dye molecules.

Nanostructured Pd/Ag/Ni electrocatalysts for the Hydrogen Evolution Reaction

As palladium is the one of the most effective electrocatalyst for the hydrogen evolution reaction, it is crucial the development of new catalysts that require small amounts of palladium to perform, but that are highly active. In this work, the electrochemical characterization of a novel electrode with low palladium content is reported, where Pd nanoparticles are supported on macroporous nickel electrodes that contain silver nanoparticles previously electrodeposited on the surface, which after heat-treatment become rich in corners and edges. The values of η100 (overpotential needed to produce a fixed amount of hydrogen) and jm (indicative of catalytic activity per unit mass of metal nanoparticles) improved (for example, at 80 °C, a η100 of 109.9 mV and a jm of 12587 A·g−1) those of other authors who applied bimetallic AgPd nanoparticles for the HER, showing that the incorporation of nanostructures (Pd over Ag) significantly reduced the energy investment required to produce hydrogen due to synergistic effects between the deposited Pd particles and the electrodeposited silver, enhancing the catalytic activity.

PdAg/CoFe2O4 Bimetallic Catalyst with High Selectivity for Glyceraldehyde in Glycerol Selective Oxidation Reaction

The catalytic oxidation of glycerol was investigated in assays with palladium-silver bimetallic nanoparticles (Pd-Ag) immobilized on cobalt ferrite (CoFe2O4). Bimetallic nanoparticles were prepared by the galvanic replacement method, immobilized on CoFe2O4 by wet impregnation. Bimetallic Pd-Ag nanoparticles with 35 wt.% Pd content effectively catalyzed the selective oxidation reaction of glycerol to glyceraldehyde. Catalytic oxidation was carried out at 60-80 °C for 2-4 h in an aqueous NaOH solution (NaOH:glycerol ratio = 4 mol:mol) under O2 pressure of 4 bar; the selectivity of glyceraldehyde reached 99.35% and the conversion of glycerol of 49.07% at a temperature of 60 °C and a reaction time of 2 h. Glyceric acid and traces of tartronic acid and mesoxalic acid were also detected. The catalyst was also very stable, showing activity up to 4 runs without significant loss of activity and selectivity.

Adaptivity of depth distribution of two metals in Pd-Ag/HOPG catalyst to external conditions in the course of mild CO oxidation

Bimetallic Pd-Ag nanoparticles supported on surface of highly oriented pyrolytic graphite have been studied by mass-spectrometry and near ambient pressure (NAP) X-ray photoelectron spectroscopy (XPS) techniques in the stoichiometric reaction mixture of CO oxidation at a total pressure of 0.25 mbar in a range of temperatures 25–300 °C to establish the correlation between their catalytic properties and evolution of the surface composition therein. Under the reaction mixture at room temperature, Pd segregation on the surface took place, which became more apparent upon a temperature increase to 150 °C. The intensity of the Pd-CO adsorption state identified in Pd3d X-ray photoelectron spectra gradually decreased from its maximum at room temperature to zero at 200 °C. Simultaneously, the Pd/Ag atomic ratio on the surface also dropped down due to the progressive CO desorption. Mass-spectrometry data showed that the reaction did not proceed at a temperature below 150 °C. Indeed, a CO2 (reaction product) signal appeared in Mass-spectrometry only above 150 °C, when the Pd-CO adsorption state in XPS essentially disappeared. Moreover, the thermal stability of Pd-Ag nanoparticles under the experimental conditions applied has been analyzed using scanning tunneling microscopy, which is also discussed in the paper.

Highly Sensitive MEMS Sensor Using Bimetallic Pd-Ag Nanoparticles as Catalyst for Acetylene Detection.

Acetylene detection plays an important role in fault diagnosis of power transformers. However, the available dissolved gas analysis (DGA) techniques have always relied on bulky instruments and are time-consuming. Herein, a high-performance acetylene sensor was fabricated on a microhotplate chip using In2O3 as the sensing material. To achieve high sensing response to acetylene, Pd–Ag core-shell nanoparticles were synthesized and used as catalysts. The transmission electron microscopy (TEM) image clearly shows that the Ag shell is deposited on one face of the cubic Pd nanoseeds. By loading the Pd–Ag bimetallic catalyst onto the surface of In2O3 sensing material, the acetylene sensor has been fabricated for acetylene detection. Due to the high catalytic performance of Pd–Ag bimetallic nanoparticles, the microhotplate sensor has a high response to acetylene gas, with a limit of detection (LOD) of 10 ppb. In addition to high sensitivity, the fabricated microhotplate sensor exhibits satisfactory selectivity, good repeatability, and fast response to acetylene. The high performance of the microhotplate sensor for acetylene gas indicates the application potential of trace acetylene detection in power transformer fault diagnosis.

Photocatalytic removal of nitrate from water using activated carbon-loaded with bimetallic Pd-Ag nanoparticles under natural solar radiation

The increase of nitrate contamination of surface and groundwater has raised a concern, because of its impact on both environment and human health. In this study, photocatalysis for nitrate treatment in water was conducted using activated carbon prepared from date palm stone decorated with single and bimetals nanoparticles using solar radiation. The prepared catalyst was characterized by XPS, SEM, EDX, TGA, and surface area analyzer instruments. The photocatalytic effect of the prepared catalyst was studied using nitrate solution and acid scavengers with different concentrations. Significant photocatalytic activity was observed for activated carbon when modified with Pd–Ag. The obtained results showed that the conversion of nitrate takes place mainly through nitrogen gas (N2) rather than nitrite (NO2–) or ammonium (NH4+). Formic acid as a hole scavenger with 0.05 M shows the maximum conversion for nitrate. The prepared photocatalyst shows stability for five cycles of nitrate ion reduction. Moreover, the results showed that the prepared catalyst could be applied for the removal of nitrate from groundwater and river water samples.

Controlled One‐pot Synthesis of PdAg Nanoparticles and Their Application in the Semi‐hydrogenation of Acetylene in Ethylene‐rich Mixtures

AbstractIn the present paper, we report the synthesis of highly functionalized nanomaterials carefully nanoengineered to catalyze the semi‐hydrogenation of acetylene in ethylene‐rich mixtures. Surface functionalization and structure modification of a series of bimetallic PdAg nanoparticles was performed using HHDMA as stabilizer and alloying the active palladium phase with silver. Bimetallic PdAg NPs with adjustable Pd/Ag ratio were prepared in water through a novel one‐pot methodology using hydrogen gas as a benign reducing agent and cyanide as additive. UV‐Vis studies indicated the formation of the bimetallic nanostructures through a sequential displacement‐galvanic reduction process mediated by cyanide. The series of colloidal NPs were deposited onto alumina and successfully applied as catalysts in the selective hydrogenation of acetylene in ethylene rich mixtures. Geometric and electronic promotion of Ag over Pd based catalysts was evidenced by the increase of the ethylene selectivity with the Ag content. The reactivity of these materials demonstrated the applicability of HHDMA stabilized NPs in a gas phase reaction of industrial interest and the success of combining several strategies for the enhancement of the alkene selectivity.

Facile bio-fabrication of Pd-Ag bimetallic nanoparticles and its performance in catalytic and pharmaceutical applications: Hydrogen production and in-vitro antibacterial, anticancer activities, and model development

The production of nanoparticles by the biosynthesis method attracts great attention due to their environmentally friendly structure and biocompatibility. In this study, a green method for the synthesis of Palladium-Silver nanoparticles (Pd-Ag NPs) using the extract of Nigella sativa seeds is reported. Pd-Ag NPs obtained by the green synthesis method were characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), UV–vis spectrometry, and X-Ray diffraction patterns (XRD). Pd-Ag NPs were seen to have a spherical structure in the TEM analysis image and the average particle size was found to be 6.80 nm. In addition, the anticancer and antibacterial activities of Pd-Ag NPs synthesized by the green synthesis method were investigated. Pd-Ag NPs had lethality of 69.26%, 52.28%, 76.90%, and 57.49% respectively, against Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus, Bacillus subtilis, and Escherichia coli bacteria at 200 μg/mL. Besides, the antibacterial activity of Pd-Ag NPs against B. subtilis, S. aureus, and MRSA bacteria was developed by the Neuro-fuzzy (ANFIS) model. The minimum inhibitory concentration (IC50) values ​​of Pd-Ag NPs against human breast cancer cells, human endometrial carcinoma cells, and human cervical cancer cell lines were determined as 12.4384 ± 0.39 μg/mL, 13.5043 ± 0.539 μg/mL, 17.7172 ± 0.782 μg/mL, respectively. The catalytic activity of Pd-Ag NPs was investigated by sodium borohydride (NaBH4) hydrolysis. Enthalpy, entropy, turner of frequency (TOF), and activation energy values ​​were calculated as 24.51 kJ/mol, −183.15 J/mol.K, 1387.29 h−1, 27.01 kJ/mol, respectively. In the light of the obtained results, it promises that Pd-Ag NPs may play a therapeutic role in complications related to cancer and bacterial infections. The use of Pd-Ag NPs as catalysts will contribute to the development and application of new nano-catalysts to reduce environmental pollution.

Lattice-Resolution, Dynamic Imaging of Hydrogen Absorption into Bimetallic AgPd Nanoparticles.

Palladium's strong reactivity and absorption affinity to H2 makes it a prime material for hydrogen-based technologies. Alloying of Pd has been used to tune its mechanical stability, catalytic activity, and absorption thermodynamics. However, atomistic mechanisms of hydrogen dissociation and intercalation are informed predominantly by theoretical calculations, owing to the difficulty in imaging dynamic metal-gas interactions at the atomic scale. Here, we use in situ environmental high resolution transmission electron microscopy to directly track the hydrogenation-induced lattice expansion within AgPd triangular nanoprisms. We investigate the thermodynamics of the system at the single particle level and show that, contrary to pure Pd nanoparticles, the AgPd system exhibits α/β coexistence within single crystalline nanoparticles in equilibrium; the nanoparticle system also moves to a solid-solution loading mechanism at lower Ag content than bulk. By tracking the lattice expansion in real time during a phase transition, we see surface-limited β phase growth, as well as rapid reorientation of the α/β interface within individual particles. This secondary rate corresponds to the speed with which the β phase can restructure and, according to our atomistic calculations, emerges from lattice strain minimization. We also observe no preferential nucleation at the sharpest nanoprism corners, contrary to classical nucleation theory. Our results achieve atomic lattice plane resolution─crucial for exploring the role of crystal defects and single atom sites on catalytic hydrogen splitting and absorption.

AgPd Nanoparticles Anchored on TiO2 Derived from a Titanium Metal–Organic Framework for Efficient Dehydrogenation of Formic Acid

AbstractTiO2 with a disc‐like morphology was prepared by direct pyrolysis of a titanium metal–organic framework [MIL‐125(Ti)] in air. Highly dispersed bimetallic AgPd nanoparticles were then anchored on TiO2 and their catalytic performance in the dehydrogenation of formic acid was systematically investigated. The Ag/Pd ratio had a significant effect on the catalyst activity, with Ag2Pd8/TiO2 exhibiting the highest total turnover frequency value of 2579 h−1 at 60 °C under an ambient atmosphere. This excellent performance was attributed to the low‐crystallinity anatase phase structure and large specific surface area of the TiO2 carrier, the alloying effect of the AgPd nanoparticles, and abundant electron transfer between the carrier and metal alloy nanoparticles.

Construction of 1D/0D/2D Zn0.5Cd0.5S/PdAg/g-C3N4 ternary heterojunction composites for efficient photocatalytic hydrogen evolution

A high-efficiency and easy-available approach was developed to obtain a ternary heterojunction composites with advanced hydrogen evolution reaction (HER) performance under visible light by water split. PdAg bimetallic nanoparticles make a close contact interface between g-C3N4(CN) and Zn0.5Cd0.5S(ZCS). Under visible light irradiation, CN and ZCS are both excited to generate electron-hole pairs, PdAg bimetallic nanoparticles act as a bridge between CN and ZCS. Not only can the photogenerated electrons from CN be captured, but they can also be quickly transferred to the surface of ZCS and participate in the photocatalytic reaction to release H2, and the recombination of charge carriers between the contact interface of ZCS and CN can be significantly inhibited. In addition, the thin CN layer reduces the photocorrosion of the ZCS and enhances the specific surface area of the composite material. After testing, the composite material with 30 wt% ZCS and 4 wt% PdAg demonstrates hydrogen evolution performance, up to 6250.7 μmol g−1h−1, which is 753 times the hydrogen evolution rate of single-component CN and 12.6 times of ZCS/CN. Compared with single-component and two-component photocatalysts, the ternary ZCS/PdAg/CN photocatalyst achieves significantly enhanced photocatalytic activity.

Bimetallic PdAg nanoparticles for enhanced electrocatalysis of ethanol oxidation reaction

The exploration of bimetallic Pd-based catalysts has become a hot-spot for the application of high performance electrocatalysts with long term stability in fuels cell. In this work, alloyed Pd x Ag 1 nanoparticles (NPs) ( x = 8, 11, 14, 17, and 20) are synthesized via a solvothermal synthesis approach. The morphologies and compositions of alloyed PdAg NPs are characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The optimized Pd 14 Ag 1 NPs exhibited excellent current activity in ethanol oxidation reaction (EOR) of 2430 mA mg −1 in an alkaline ethanol solution, 3.3 times higher than commercial Pd/C counterpart (727 mA mg −1 ), closely related to the change of electron structure and surface active sites. In addition, compared with other PdAg NPs and commercial Pd/C catalysts, Pd 14 Ag 1 NPs performs better antitoxicity, lower reaction barrier, and better long-term stability. Experimental results show that higher catalytic temperature, higher pH values, and higher ethanol concentration should favor the oxidation of ethanol. • Alloyed Pd x Ag 1 nanoparticles are synthesized via solvothermal synthesis. • The catalytic activity of Pd 14 Ag 1 NPs is much higher than commercial Pd/C. • The effects of temperature as well as concentration of KOH/C 2 H 5 OH were discussed.

Pairwise Stereoselective Hydrogenation of Propyne on Supported Pd–Ag Catalysts Investigated by Parahydrogen-Induced Polarization

Alkyne semihydrogenation offers a key approach for the synthesis of stereodefined molecules. The stereoselective hydrogenation of propyne to propene over Al2O3-supported Pd–Ag bimetallic catalysts is studied by using parahydrogen-induced polarization (PHIP) NMR technique. The supported catalysts were prepared by an incipient-wetness impregnation method, and their properties were systemically tuned by altering Pd and Ag components. Structural characterization by X-ray diffraction, infrared spectra, and transmission electron microscope shows the formation of highly dispersed bimetallic Pd–Ag nanoparticles with random alloy structures on Al2O3 support. For the hydrogenation of propyne over Pd–Ag catalysts with higher Ag concentration, the adsorbed protons are mostly restricted on the active Pd ensembles, which favors a higher pairwise hydrogen addition to propyne, leading to a stronger PHIP effect. The product stereoselectivity measurements show that the pairwise syn-addition to propyne increases with Ag content in the Pd–Ag alloy. The reaction conditions impact the pairwise hydrogenation stereoselectivity. A lower H2/propyne ratio of reactant flow or a higher total reactant flow rate enhances the apparent pairwise syn-addition stereoselectivity, which can be accounted for by the suppressed cis–trans isomerization process and/or a higher intrinsic pairwise syn-addition selectivity.

PdAg Nanoparticles Supported on Bipyridine‐Based Porous Organic Polymers: An Effective Bimetallic Catalyst for the Hydrodeoxygenation of Vanillin

Upgrading renewable biomass into high‐valued biofuels and chemicals is highly desirable, however, still remains a challenging task. Hydrodeoxygenation (HDO) is regarded as an effective and promising approach for biorefinery. Herein, the bipyridine ligand with strong metal anchoring capacity is used as a monomer to fabricate porous organic framework (POF) materials. The bipyridine‐based POF (named as N‐BB) serves as an HDO catalyst support to stabilize PdAg bimetallic nanoparticles. Due to the abundant porous structure of the N‐BB support, good dispersity of PdAg nanoparticles, large specific surface area, and synergetic effect of Pd and Ag, the prepared Pd9Ag1/N‐BB catalyst exhibits high activity and stability for the HDO of lignin‐derived molecules. In addition, the kinetic studies of the hydrogenation of vanillin over Pd9Ag1/N‐BB are also carried out, providing strong evidence for the excellent performance of the Pd9Ag1/N‐BB catalyst. The Pd9Ag1/N‐BB displays a great application prospect in catalytic HDO of lignin‐derived compounds.

Photodeposition of AgPd nanoparticles on Bi2WO6 nanoplates for the enhanced photodegradation of rhodamine B

Visible-light-driven AgPd/Bi2WO6 nanocomposites containing different atomic ratios of Ag:Pd were studied for photodegradation of rhodamine B (RhB) under visible light irradiation. The AgPd nanoparticles attached on the surface of Bi2WO6 nanoplates were prepared by photoreduction deposition method. Phase, morphology, vibrational mode, chemical composition, valence state and optical absorption were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDS), transition electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV–visible spectroscopy. In this study, bimetallic AgPd nanoparticles were fully deposited on top of orthorhombic Bi2WO6 nanoplates. 10% Ag0.9Pd0.1/Bi2WO6 nanocomposites show the highest photodegradation of RhB illuminated by visible radiation. ⋅OH and ⋅O2− are the main radicals that play the role in degrading of RhB over 10% Ag0.9Pd0.1/Bi2WO6 nanocomposites.

PdAg Nanoparticles with Different Sizes: Facile One-Step Synthesis and High Electrocatalytic Activity for Formic Acid Oxidation.

Recently, direct formic acid fuel cells (DFAFCs) which possess superior advantages such as a low operating temperature, light environmental pollution and high energy density, have been considered as one of the power generation technologies with a bright prospect. Herein, bimetallic PdAg nanoparticles (NPs) with different particle sizes were successfully produced via an easy one-pot solvothermal co-reduction synthetic route and their electrocatalytic performance for formic acid oxidation (FAO) were further investigated. In our strategy, the size of PdAg NPs can be easily controlled by only varying the concentration of precursors. The larger sized PdAg alloy (9.5 nm, noted as PdAg-L) was obtained at a low concentration of precursors, while the smaller PdAg alloy (3.7 nm, named as PdAg-S) was separated from the reaction system with higher solubility by centrifugation. The electrocatalytic activity and stability of the obtained PdAg NPs could be well optimized when incorporated with carbon (C), which is owing to a synergetic effect. The PdAg-S/C exhibits the highest mass activity with around 1.6 times that of PdAg-L/C and 2 times that of commercial Pd/C, which can be attributed to its larger ECSA and lower adsorption energy of the intermediate to facilitate the direct oxidation of HCOOH molecule.

Synthesis of Bimetallic PdAg Nanoparticles and Their Electrocatalytic Activity toward Ethanol

Palladium-based bimetallic nanoparticles (NPs) have been studied as important electrocatalysts for energy conversion due to their high electrocatalytic performance and the less usage of the noble metal. Herein, well-dispersed PdAg NPs with uniform size were prepared via oil bath accompanied with the hydrothermal method. The variation of the Ag content in PdAg NPs changed the lattice constant of the face-centered cubic alloy nanostructures continuously. The Pd/Ag molar ratio in the PdAg alloy NPs affected their size and catalytic activity toward ethanol electrooxidation. Experimental data showed that PdAg NPs with less Ag content exhibited better electrocatalytic activity and durability than pure Pd NPs owing to both the small size and the synergistic effect. PdAg-acac-4 with the Pd/Ag molar ratio of 4 : 1 in the start system possessed the highest catalytic current density of 2246 mA/mg for the electrooxidation of ethanol. The differences in the morphology and electrocatalytic activity of the as-made PdAg NPs have been discussed and analyzed.

PHOTOCATALYTIC REACTION OF HETEROSTRUCTURE Ag0.9Pd0.1/Bi2WO6 NANOCOMPOSITES TO RHODAMINE B UNDER VISIBLE LIGHT IRRADATION

Bi2WO6 thin nanoplates were modified by 5% by weight of bimetallic Ag0.9Pd0.1 nanoparticles to form Schottky barrier by photoreduction method. The as‐synthesized heterostructure 5% Ag0.9Pd0.1/Bi2WO6 nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier Transform Infrared Spectrophotometry (FTIR) and Raman spectroscopy. XRD pattern of heterostructure 5% Ag0.9Pd0.1/Bi2WO6 nanocomposites showed only orthorhombic Bi2WO6 structure due to the low loading content and small particle size of bimetallic AgPd nanoparticles. TEM image of heterostructure 5% Ag0.9Pd0.1/Bi2WO6 nanocomposites shows a number of sphere-like bimetallic AgPd nanoparticles embedded on top of Bi2WO6 thin nanoplates. The photocatalytic activities of pure Bi2WO6 sample and heterostructure 5% Ag0.9Pd0.1/Bi2WO6 nanocomposites were studied through the photodegradation of rhodamine B (RhB) under visible light irradiation. The heterostructure 5% Ag0.9Pd0.1/Bi2WO6 nanocomposites show photodegradation of RhB under visible light irradiation higher than pure Bi2WO6 nanoplates. The enhanced photocatalytic properties of the heterostructure 5% Ag0.9Pd0.1/Bi2WO6 nanocomposites are attributed to the efficient separation of photoinduced carriers at the interface of bimetallic Ag0.9Pd0.1 nanoparticles and Bi2WO6 nanoplates. A possible photocatalytic mechanism is also proposed according the experimental results.

Formation of Isolated Single-Atom Pd1 Sites on the Surface of Pd–Ag/Al2O3 Bimetallic Catalysts

The structure of Pd–Ag/Al2O3 samples with different Ag/Pd ratios has been studied by a complex of physicochemical methods (H2-TPR, XRD, H2-TPD, TEM). Catalysts have been synthesized by supporting an active component on α-Al2O3 and γ-Al2O3. X-ray diffraction analysis has revealed the formation of a Pd–Ag substitutional solid solution with a face-centered cubic crystal lattice owing to alloying of the Pd and Ag components. An increase in the Ag content in the composition of bimetallic nanoparticles hinders the formation of palladium hydride (PdHx), which is completely suppressed at a ratio of Ag/Pd > 0.5. Infrared spectroscopy of adsorbed CO has revealed the formation of single-atom Pd1 sites on the surface of supported Pd–Ag bimetallic nanoparticles isolated from each other by silver atoms. Analysis of the structural stability of isolated Pd1 sites has shown that, under conditions of CO adsorption at 150°C, the stability of the sites can be provided by an increase in the Ag/Pd ratio to ≥2.

Synthesis and Characterization of AgPd Bimetallic Nanoparticles as Efficient Electrocatalysts for Oxygen Reduction Reaction

The synthesis of AgPd bimetallic nanoparticles was carried out by a simple polyol method in order to obtain an improved control of the morphology and the particle size. The nanoparticles were characterized using aberration-corrected scanning/transmission electron microscopy (STEM). Also, parallel beam X-ray diffraction analysis was carried out to evaluate the crystallographic structure. High-angle annular dark field (HAADF)-STEM images of the AgPd bimetallic nanoparticles were obtained. The contrast of the images shows that the nanoparticles have an alloy structure with an average size of 10.17 nm and icosahedral morphology. Electrochemical characterization was carried out to analyze the catalytic behavior of the bimetallic nanoparticles. Ag2Pd1/C bimetallic nanoparticles showed a better catalytic activity towards oxygen reduction reaction than Ag/C at room temperature. Furthermore, simulations based on DFT method have been used to describe the crystalline structure of nanoparticles, revealing that the electronic structure is significantly affected by the elemental distribution.