Iron-based Systems Research Articles

Enhancing magnetostriction in FeAl alloys via crystal growth orientation tuning by a trace amount of Pt doping

Iron-based cubic alloy systems opened the door to the development of magnetostrictive materials with moderate magnetostriction, low cost, and good mechanical properties. At the as-cast state, the grain growth orientation of these alloy systems is close to random, which deteriorates magnetostriction. Doping with certain elements can tune the growth orientation to enhance magnetostriction. However, the driving force for the crystal growth along preferential orientation is still not clear. Here in this work, revealed by density functional theory (DFT) calculation, Pt doping can tune the crystal growth direction of FeAl along <100> crystal direction (same as easy magnetization direction), which can be utilized to realize 90° domain-switching and thus magnetostriction is enhanced greatly. These are confirmed by experimental results. The magnetostriction increases from 29 ppm to 80 ppm, representing a 176% enhancement through doping with 0.4 at.% Pt. The maze magnetic domain structures, observed by magnetic force microscope, are also preferentially <100> oriented and feature stripes. In consideration of the similarity between this study and our previous study on FeGa alloy (C. Zhou et al., 2020), it can be expected that our methods can be extended to other magnetostrictive materials and help develop polycrystals with desired orientations.

Elucidating distinct roles of chemical reduction and autotrophic denitrification driven by three iron-based materials in nitrate removal from low carbon-to-nitrogen ratio wastewater

Effective nitrate removal is a key challenge when treating low carbon-to-nitrogen ratio wastewater. How to select an effective inorganic electron donor to improve the autotrophic denitrification of nitrate nitrogen has become an area of intense research. In this study, the nitrate removal mechanism of three iron-based materials in the presence and absence of microorganisms was investigated with Fe2+/Fe0 as an electron donor and nitrate as an electron acceptor, and the relationship between the iron materials and denitrifying microorganisms was explored. The results indicated that the nitrogen removal efficiency of each iron-based material coupled sludge systems was higher than that of iron-based material. Furthermore, compared with the sponge iron coupled sludge system (60.6%–70.4%) and magnetite coupled sludge (56.1%–65.3%), the pyrite coupled sludge system had the highest removal efficiency of TN, and the removal efficiency increased from 62.5% to 82.1% with time. The test results of scanning electron microscope, X-ray photoelectron spectroscopy and X-ray diffraction indicated that iron-based materials promoted the attachment of microorganisms and the chemical reduction of nitrate in three iron-based material coupled sludge systems. Furthermore, the pyrite coupled sludge system had the highest nitrite reductase activity and can induce microorganisms to secrete more extracellular polymer substances. Combined with high-throughput sequencing and PICRUSt2 functional predictive analysis software, the total relative abundance of the dominant bacterial in pyrite coupled sludge system was the highest (72.06%) compared with the other iron-based material systems, and the abundance of Blastocatellaceae was relatively high. Overall, these results suggest that the pyrite coupled sludge system was more conducive to long-term stable nitrate removal.

Reduction of Iron Oxides for CO2 Capture Materials

The iron industry is the largest energy-consuming manufacturing sector in the world, emitting 4–5% of the total carbon dioxide (CO2). The development of iron-based systems for CO2 capture and storage could effectively contribute to reducing CO2 emissions. A wide set of different iron oxides, such as hematite (Fe2O3), magnetite (Fe3O4), and wüstite (Fe(1−y)O) could in fact be employed for CO2 capture at room temperature and pressure upon an investigation of their capturing properties. In order to achieve the most functional iron oxide form for CO2 capture, starting from Fe2O3, a reducing agent such as hydrogen (H2) or carbon monoxide (CO) can be employed. In this review, we present the state-of-the-art and recent advances on the different iron oxide materials employed, as well as on their reduction reactions with H2 and CO.

A nickel-modified perovskite-supported iron oxide oxygen carrier for chemical looping dry reforming of methane for syngas production

The chemical looping dry reforming of methane (CLDRM) process, which converts methane and carbon dioxide into syngas, is an environmentally friendly greenhouse gas utilization strategy. In this work, it is demonstrated that a nickel-modified perovskite-supported iron-based oxygen carrier (Ni-Fe2O3/La0.8Sr0.2FeO3) significantly enhances the reactivity of CLDRM in the temperature range of 770–800 °C while maintaining high CO selectivity and oxygen capacity, as well as good carbon deposition resistance. With the addition of nickel, the methane conversion is 52 % higher than that without nickel at 800 °C. Rational coupling of the oxygen carrier components achieves over 99 % CO selectivity. 160 consecutive isothermal cycles confirm the outstanding stability of Ni-Fe2O3/La0.8Sr0.2FeO3. Based on the experimental results and characterizations, the evolution scheme and synergistic effects between the components of the Ni-Fe2O3/La0.8Sr0.2FeO3 oxygen carrier for CLDRM reaction are proposed. The results provide a pathway for oxygen carrier design to decrease the reforming temperature while maintaining excellent reaction performance in iron-based chemical looping systems.

Mechanical properties and corrosion resistance of laser cladding iron-based coatings with two types of NbC reinforcement

In this work, iron-based alloy coating without NbC (No-NbC), directly added NbC (A-NbC) and in-situ synthesized NbC (I-NbC) reinforced composite coatings were fabricated on the SS304 substrate surface to compare the strengthening effects of two types of NbC introduction mechanisms on the iron-based alloy. All as-clad coatings presented a complete and dense structure, and compared to A-NbC composite coating, I-NbC composite coating achieved a fine dispersion distribution of the reinforcement. Unlike A-NbC coating with α-Fe and NbC, it was revealed that α-Fe, γ-Fe, NbC and Cr23C6 existed in I-NbC composite coating, and the possibility of in-situ synthesized NbC has been confirmed through thermodynamic theory. Additionally, the introduction of NbC notably refined the grain size of iron-based alloy systems and restrained the generation of high angle grain boundaries (HAGBs). Compared to substrate and No-NbC coating, A-NbC and I-NbC composite coating achieved the higher average microhardness value of 524.6 ± 12 HV and 534.9 ± 4 HV, respectively, mainly relying on the precipitation of NbC in the coating. Meanwhile, the results in the dry sliding friction test found that due to the dispersion and uniformity of in situ synthesized reinforcements, I-NbC composite coating presented a satisfactory wear resistance with the lowest specific wear rate of 6.55 × 10−6 mm3/N m and the minimum friction coefficient of 0.627. NbC particles were considered to be detrimental to the corrosion resistance of coatings in electrochemical corrosion tests due to galvanic corrosion between them and the matrix. However, I-NbC composite coating provided a favorable condition for the formation of passivation film by introducing Cr and Nb atoms, with the minimum Icorr of only 7.55 × 10−8 A cm−2, which was much less than that of other as-clad coatings.

(Invited) Investigating the Influence of Electrolyte Additives and Anode Structures on Electroplating Performance Towards Use in Iron-Based Batteries

Environmental concerns and economic development motivate a shift towards an energy economy based on renewable energy sources. In this new paradigm, large scale energy storage plays a pivotal role in the integration of intermittent and fluctuating renewable energy technologies, such as wind or solar. Among the available solutions, redox flow batteries (RFBs) are promising contenders as they allow independent scaling of power and energy, have a projected long lifetime and lower costs than other battery technologies[1]. However, the most developed RFB systems to date, i.e. all vanadium-RFBs, are still not extensively deployed, due to the elevated and fluctuating costs of vanadium, and the geographical dependency on resource extraction. Iron-based flow batteries, on the contrary, rely on earth-abundant active materials and benign water as solvent, granting potential for cost-effective energy storage systems[2]. However, the efficiency of these electrochemical reactors is limited by challenges such as unoptimized electrolyte compositions, which cause parasitic generation of hydrogen gas or irregular coating distributions[3], and electrode materials that have not been optimized for this specific application. These can severely affect current density distribution, therefore conditioning the plating and stripping or detachment of plated regions (irreversible capacity loss), which limit battery efficiency and operational lifetime. Current cycle life of iron-based batteries has been reported around 2,000 while the US DOE establishes targets comprised between 1,000 to 10,000 cycles[4] Therefore, in this research we aim to understand the underlying mechanisms of iron electroplating and the key parameters which influence the resulting structures, to enhance overall iron-based battery performance.In this talk, we present our advances to improve iron-RFB efficiency and durability, focusing on the iron plating electrode. In this research, we first leverage planar, model iron surfaces in a Swagelok-type cell and employ a suite of electrochemical techniques (e.g., chronoamperometry, electrochemical impedance spectroscopy) to gain insight into the poorly understood process of iron electroplating. The experimental data is coupled with parameter fitting to pre-existing physical models[5]. Additionally, we study the influence of chelating agents, such as buffering agents, surfactants and levelers (e.g., ascorbate, tetrabutylammonium ion or thiourea, respectively), on plating phenomena and elucidate their effects on the kinetics and structure of the resulting iron coatings, as well as their cycling behavior in symmetric cell configuration. Overall, we find that buffering agents achieved the greatest improvement in terms of faradaic efficiency, resulting in moderate cell currents, while other additives, such as levelers, allow larger plating currents at the expense of limited faradaic efficiencies.In addition to electrolyte-induced effects, another bottleneck of iron-RFBs are the electrodes employed in the negative half-cell. Common electrodes rely on iron-containing films or sintered iron oxide particles to form 3D structures[6]. However, comprehensive analysis relating anode structure and composition to flow cell performance have not been addressed to date. Accordingly, we hereby study the effects of diverse types of negative electrodes. To minimize complexities emerging in porous electrodes, we first analyze the effects of electrode composition in 2D films (e.g., pure iron, doped iron or iron-carbon hybrid systems) on the cell performance via polarization. Building on these findings, and to further improve iron-RFB performance, we study the impact of electrode architecture, by introducing complex, three-dimensional porous electrodes that enable higher surface areas and mass transport rates. We find that these three-dimensional electrode structures with large pore sizes produce an enhancement in exploitable active species and increased capacity, although there arises a trade-off with the structural integrity of these 3D electrodes. With this research we hope to shed light onto the control of ion-ion, solid-liquid and solid-solid interplay for iron-based batteries to aid the design of tailored electrolytes and advanced electrodes to realize low-cost iron-based battery systems.

Persistent degradation of 2,4-dichlorophenol in groundwater by persulfate synergize with Fe(III)/CaSO3 system: Role of Fe(IV) and 1O2 oxidation

S(IV)-based advanced oxidation processes (S(IV)-AOPs) have been gradually developed in groundwater organic contamination remediation. However, conventional Na2SO3 is extremely soluble and prone to produce high concentrations of SO32− to quench reactive oxide species (ROS), which seriously hinders the practical application of S(IV)-AOPs. In this work, a novel homogeneous iron-based AOPs system consisting of Fe(III), CaSO3, and peroxydisulfate (PDS) was proposed by using CaSO3 instead of Na2SO3 as a slow-released source of SO32−. With the synergistic of PDS, the generated Fe(II) continuously converted to Fe(III), and the kobs of the constructed Fe(III)/CaSO3/PDS system was 8.8 times higher than that of the Fe(III)/CaSO3 system. 96.5 % of 2,4-dichlorophenol (2,4-DCP) was durably degraded by Fe(III)/CaSO3/PDS system at a dose ratio of 1:5:15. ROS quenching experiments, electron paramagnetic resonance (EPR) tests, and probe tests indicated that Fe(IV), SO4−, and 1O2 played a major role in the degradation of 2,4-DCP. The conversion of SO4− to 1O2 in the system was demonstrated. Possible degradation pathways were proposed based on the density functional theory (DFT) calculations combined with LC-MS and GC–MS analysis. The results confirmed that the Fe(III)/CaSO3/PDS system exhibited strong stability and broad-spectrum applicability, which laid the foundation for the future engineering application of homogeneous iron-based AOP systems.

First-principles study of the magnetic anisotropy of ultrathin B-, C-, and N-doped FeCo films

Iron-based layered systems are of great interest because of their ability to tune effective material parameters such as magnetic anisotropy energy (MAE). The influence of the crystallographic structure of Fe, its thickness, and the presence of other layers above and below the Fe layer on magnetic parameters, such as the MAE of the studied system, is an intriguing and important topic from an application point of view. Here, we present a density functional theory (DFT) study of the magnetic anisotropy of nine-monolayer Fe, FeCo, and FeCo films with B, C, and N dopants placed in octahedral interstitial positions. The theoretical study is based on calculations using the full-potential local-orbital code FPLO and the generalized gradient approximation. The chemical disorder in the FeCo layers was modeled using the virtual crystal approximation. The structures of the layers were subjected to optimization of the geometry of the interlayer spacings and the neighborhood of the dopant sites. We determined the local magnetic moments and the excess charge at each layer position. We also identified the influence of dopant atoms on the magnetic properties of FeCo layers, such as magnetization and magnetic anisotropy.

Study on the characteristics of Si-doped diamond synthesized by different iron-based catalyst systems under high temperature and pressure

This article investigates the effects of different iron based catalysts on the morphology and quality characteristics of diamond single crystals synthesized in high-temperature and high-pressure environments. The results indicated that incorporating silicon impurities led to defects in diamond crystals, increased internal stress in the lattice, and decreased crystal quality. In addition, there are also differences in the synthesis of silicon doped diamonds under different iron based catalyst systems. This manuscript uses optical microscopy, scanning electron microscopy and Raman spectroscopy to characterize diamond crystals, exploring the influence of catalyst differences on the structure of silicon-doped diamonds. At the same time, simulation analysis was conducted on the convective field of the catalyst in the diamond synthesis chamber, and the convective field characteristics of silicon doped diamond growth under different iron based catalysts were established. The simulation results are consistent with the synthesis experimental work. This work provides a new approach to improve the quality of silicon doped diamond single crystals.

Accelerated removal of naproxen in the iron-based peracetic acid activation system by chloride ions: Enhancement of reactive oxidative species via the formation of iron-chloride complexes

Iron-based PAA activation process is a promising advanced oxidation process for water decontamination which depends on Fe(II) as the main reactive site for PAA activation, resulting in various reactive oxidative species (ROSs) generation. For practical application, the impact of water matrix chloride ion (Cl−) on ROSs production and contaminants removal should be carefully considered. In this study, it’s found that the introduction of Cl− (0.1–10 mM) could significantly enhance the reaction rate of the rapid stage (kobs1) up to 2.15 times at the initial pH of 4.25 in the Fe(II)/PAA system. Further studies demonstrated that the improved removal capacity of NAP resulted from Cl− induced R-O• generation as indicated by the exposure dose of R-O• increasing from 7.74 × 10−11 M•s to 1.44 × 10−10 M•s, rather than chlorine-containing radicals’ generation. DFT calculation results suggested that the formed Fe(II)-Cl− complexes could easily activate PAA to generate more ROSs for NAP removal. Moreover, Fe(II)/PAA treatment can alleviate the biological toxicity of pollutants via both the Escherichia coli test and toxicity assessment. The obtained new knowledge manifested that Cl− can boost ROSs generation and conversion in iron-based PAA systems, providing guidance for the efficient decontamination of chlorine-containing sewage with PAA-based AOPs.

Vortex Phase Dynamics in Yttrium Superhydride YH6 at Megabar Pressures.

A comprehensive study of vortex phases and vortex dynamics is presented for a recently discovered high-temperature superconductor YH6 with Tc(onset) of 215 K under a pressure of 200 GPa. The thermal activation energy (U0) is derived within the framework of the thermally activated flux flow (TAFF) theory. The activation energy yields a power law dependence U0 ∝ Hα on magnetic field with a possible crossover at a field around 8-10 T. Furthermore, we have depicted the vortex phase transition from the vortex-glass to vortex-liquid state according to the vortex-glass theory. Finally, vortex phase diagram is constructed for the first time for superhydrides. Very high estimated values of flux flow barriers U0(H) = (1.5-7) × 104 K together with high crossover fields make YH6 a rather outstanding superconductor as compared to most cuprates and iron-based systems. The Ginzburg number for YH6 Gi = (3-7) × 10-3 indicates that thermal fluctuations are not so strong and cannot broaden superconducting transitions in weak magnetic fields.

A Brain-Targeting NIR-II Ferroptosis System: Effective Visualization and Oncotherapy for Orthotopic Glioblastoma.

Near-infrared-II (NIR-II) ferroptosis activators offer promising potentials in in vivo theranostics of deep tumors, such as glioma. However, most cases are nonvisual iron-based systems that are blind for in vivo precise theranostic study. Additionally, the iron species and their associated nonspecific activations might trigger undesired detrimental effects on normal cells. Considering gold (Au) is an essential cofactor for life and it can specifically bind to tumor cells, Au(I)-based NIR-II ferroptosis nanoparticles (TBTP-Au NPs) for brain-targeted orthotopic glioblastoma theranostics are innovatively constructed. It achieves the real-time visual monitoring of both the BBB penetration and the glioblastoma targeting processes. Moreover, it is first validated that the released TBTP-Au specifically activates the effective heme oxygenase-1-regulated ferroptosis of glioma cells to greatly extend the survival time of glioma-bearing mice. This new ferroptosis mechanism based on Au(I) may open a new way for the fabrication of advanced and high-specificity visual anticancer drugs for clinical trials.

Competing Vortex Topologies in Iron-Based Superconductors.

In this Letter, we establish a new theoretical paradigm for vortex Majorana physics in the recently discovered topological iron-based superconductors (TFeSCs). While TFeSCs are widely accepted as an exemplar of topological insulators (TIs) with intrinsic s-wave superconductivity, our theory implies that such a common belief could be oversimplified. Our main finding is that the normal-state bulk Dirac nodes, usually ignored in TI-based vortex Majorana theories for TFeSCs, will play a key role of determining the vortex state topology. In particular, the interplay between TI and Dirac nodal bands will lead to multiple competing topological phases for a superconducting vortex line in TFeSCs, including an unprecedented hybrid topological vortex state that carries both Majorana bound states and a gapless dispersion. Remarkably, this exotic hybrid vortex phase generally exists in the vortex phase diagram for our minimal model for TFeSCs and is directly relevant to TFeSC candidates such as LiFeAs. When the fourfold rotation symmetry is broken by vortex-line tilting or curving, the hybrid vortex gets topologically trivialized and becomes Majorana free, which could explain the puzzle of ubiquitous trivial vortices observed in LiFeAs. The origin of the Majorana signal in other TFeSC candidates such as FeTe_{x}Se_{1-x} and CaKFe_{4}As_{4} is also interpreted within our theory framework. Our theory sheds new light on theoretically understanding and experimentally engineering Majorana physics in high-temperature iron-based systems.

Microbial response mechanism of plants and zero valent iron in ecological floating bed: Synchronous nitrogen, phosphorus removal and greenhouse gas emission reduction

Iron-based ecological floating beds (EFBs) are often used to treat the secondary effluent from wastewater treatment plant to enhance the denitrification process. However, the impact and necessity of plants on iron-based EFBs have not been systematically studied. In this research, two iron-based EFBs with and without plants (EFB-P and EFB) were performed to investigate the response of plants on nutrient removal, GHG emissions, microbial communities and functional genes. Results showed the total nitrogen and total phosphorus removal in EFB-P was 45–79% and 48–72%, respectively, while that in EFB was 31–67% and 44–57%. Meanwhile, plants could decrease CH4 emission flux (0–3.89 mg m−2 d−1) and improve CO2 absorption (4704–22321 mg m−2 d−1). Plants could increase the abundance of Nitrosospira to 1.6% which was a kind of nitrifying bacteria dominant in plant rhizosphere. Among all denitrification related genera, Simplicispira (13.08%) and Novosphingobium (6.25%) accounted for the highest proportion of plant rhizosphere and iron scrap, respectively. Anammox bacteria such as Candidatus_Brocadia was more enriched on iron scraps with the highest proportion was 1.21% in EFB-P, and 2.20% in EFB. Principal co-ordinates analysis showed that plants were the critical factor determining microbial community composition. TN removal pathways were mixotrophic denitrification and anammox in EFB-P while TP removal pathways were plant uptake and phosphorus-iron coprecipitation. In general, plants play an important directly or indirectly role in iron-based EFBs systems, which could not only improve nutrients removal, but also minimize the global warming potential and alleviate the greenhouse effect to a certain extent.

Concomitant Electro-Fenton Processes in Iron-Based Electrocoagulation Systems for Sulfanilamide Degradation: Roles of Ca2+ in Fe(II)/Fe(III) Complexation and Electron Transfer

Concomitant Electro-Fenton Processes in Iron-Based Electrocoagulation Systems for Sulfanilamide Degradation: Roles of Ca²⁺ in Fe(II)/Fe(III) Complexation and Electron Transfer

A thermodynamic analysis on thiosulfate leaching of gold under the catalysis of Fe3+/Fe2+ complexes

• Thermodynamic analysis of Fe-catalyzed thiosulfate leaching of gold is performed. • Catalysis of EDTA 4– , ox 2– , CN – and cit 3– complexes of Fe 3+ /Fe 2+ are involved. • Possible mechanisms for Fe-catalyzed thiosulfate leaching of gold are elucidated. • Reasons for low reactivity of Fe complexes towards thiosulfate are proposed. Thiosulfate is an eco-friendly gold lixiviant that is promising to replace the highly toxic cyanide. Copper is a conventional catalyst in accelerating the rate of thiosulfate leaching of gold, but it causes high thiosulfate consumption and complex gold recovery process. Attempts on the replacement of copper by other transitional metals such as nickel, cobalt and iron have been made to address the two issues. Among the catalysts, iron is cheap with great potential of development and industrial application. Few research has focused on the thermodynamics for iron-based thiosulfate systems. In this paper, a systematic thermodynamic analysis on the thiosulfate leaching of gold catalyzed by Fe 3+ /Fe 2+ and the ligand of EDTA 4– , oxalate (ox 2– ), cyanide (CN – ) or citrate (cit 3– ) is conducted by constructing a series of predominance area and speciation diagrams. Information on the stability, speciation, and redox behavior of iron species under various solution conditions are provided to better understand the complex solution chemistry and possible mechanisms for the iron-catalyzed gold thiosulfate leaching. The likely reasons for the high stability and low consumption of thiosulfate under the catalysis of Fe 3+ /Fe 2+ complexes are also proposed.

Iron-catalyzed cross-couplings of propargylic substrates with Grignard reagents

One of the main challenges of modern chemical industry is the inevitable transition to greener, more sustainable manufacturing processes that utilize raw materials more effectively, minimize waste streams, and avoid the use of toxic and hazardous materials. The development of new iron-based catalytic systems can eliminate the need for the currently widely used, costly and potentially toxic heavy metal catalysts in industrially relevant chemical reactions. Prominent examples of such processes include transition metal-catalyzed cross-coupling reactions for formation of carbon-carbon (CC) bonds. This minireview outlines recent developments in the area of iron-catalyzed cross-coupling chemistry during the last couple of decades, with special emphasis on the use of propargylic substrates and Grignard reagents as coupling partners.

Interlayer Structure Manipulation of Iron Oxychloride by Potassium Cation Intercalation to Steer H2O2 Activation Pathway.

Structural regulation of the active centers is often pivotal in controlling the catalytic functions, especially in iron-based oxidation systems. Here, we discovered a significantly altered catalytic oxidation pathway via a simple cation intercalation into a layered iron oxychloride (FeOCl) scaffold. Upon intercalation of FeOCl with potassium iodide (KI), a new stable phase of K+-intercalated FeOCl (K-FeOCl) was formed with slided layers, distorted coordination, and formed high-spin Fe(II) species compared to the pristine FeOCl precursor. This structural manipulation steers the catalytic H2O2 activation from a traditional Fenton-like pathway on FeOCl to a nonradical ferryl (Fe(IV)═O) pathway. Consequently, the K-FeOCl catalyst can efficiently remove various organic pollutants with almost 2 orders of magnitude faster reaction kinetics than other Fe-based materials via an oxidative coupling or polymerization pathway. A reaction-filtration coupled process based on K-FeOCl was finally demonstrated and could potentially reduce the energy consumption by almost 50%, holding great promise in sustainable pollutant removal technologies.

High-Frequency ac Susceptibility of Iron-Based Superconductors.

A microwave technique suitable for investigating the AC magnetic susceptibility of small samples in the GHz frequency range is presented. The method—which is based on the use of a coplanar waveguide resonator, within the resonator perturbation approach—allows one to obtain the absolute value of the complex susceptibility, from which the penetration depth and the superfluid density can be determined. We report on the characterization of several iron-based superconducting systems, belonging to the 11, 122, 1144, and 12442 families. In particular, we show the effect of different kinds of doping for the 122 family, and the effect of proton irradiation in a 122 compound. Finally, the paradigmatic case of the magnetic superconductor EuP-122 is discussed, since it shows the emergence of both superconducting and ferromagnetic transitions, marked by clear features in both the real and imaginary parts of the AC susceptibility.

Correlating electronegativity in bimetallic oxygen carriers for chemical looping combustion

Metallic tailoring of oxygen carrier plays a crucial role within chemical looping combustion (CLC) applications, which can be correlated to the redox reaction enhancement and sustainability. Such attributes arise from the electric valence of the material constituents, which can bring about superior oxygen vacancy and structural stability. In the concurrent study, the role of electronegativity of the bimetallic carriers upon CLC performance was scrutinized based on various bimetallic metal oxides composition. Two metallic systems were examined in the current study: Iron based oxides and copper-based oxides, where the secondary metallic element within each of the examined oxide carrier is composed of one of the 5 metallic elements, predefined for the purpose of electronegativity variation. The secondary metallic element include: Calcium, Lanthanum, Magnesium, Manganese, and Chromium. Several gas byproducts were monitored during the course of the CLC reaction, via mass spectrometer, in order to quantify the variations incurred as a result of different metallic composition inclusion. Additionally, electron microscopic techniques, such as the SEM, were utilized in the study, so as to visualize the structural alteration of sintered materials. The experimental results indicate a higher reactivity with the fuel at a higher electronegativity difference within the bimetallic structure, in the case of iron-based oxide system. Also, copper-based oxide system was associated with higher carbon dioxide production with higher selectivity, relative to iron-based oxide systems.