SEM Elemental Mapping Research Articles

Hybrid ZnO/Ag3PO4 photocatalysts, with low and high phosphate molar percentages

In this work, a previously optimized synthesized ZnO photocatalyst was modified with different molar percentages of Ag3PO4 through a facile in situ precipitation–deposition method and then characterized by different techniques (XRD, XRF, BET, UV–vis DRS, SEM, TEM and XPS). The incorporation of Ag3PO4 produces important changes in the light absorption properties with a significant absorbance in the visible region observed for ZnO modified with different amounts of Ag3PO4; the optical absorption intensity in the visible region of the coupled ZnO/Ag3PO4 increases as the molar percentages of Ag3PO4 increases, evidencing a clear dependence on the content of Ag3PO4. However, this work shows that the incorporation of Ag3PO4 in almost all cases reduces the photocatalytic capacity of ZnO, except when it is used in a specific percentage of 10 % and only being more active against rhodamine B and not on the Caffeine. SEM images and elemental mapping indicate that Ag3PO4 disperses very well in the ZnO particles, exhibiting an almost homogeneous distribution, showing zones with cumulus of Ag3PO4 (rich in P-Ag) in contact with ZnO-zones (rich in Zn). All the prepared photocatalysts were tested in the photocatalytic degradation of rhodamine B as a dye, and caffeine as a toxic and persistent emerging compound under UV and visible light illumination. It is reported that not only the ZnO:Ag3PO4 ratio is an important factor that influences the photocatalytic process of substrate degradation, but also the nature of the substrate has an important influence on the photocatalytic behavior of the materials under both UV and visible illumination. Thus, pristine Ag3PO4 showed high photocatalytic degradation for rhodamine B, while for caffeine negligible photocatalytic degradation was found in both the UV and visible regions. The thermal- and photo-stability of the coupled system was also studied. At least, for rhodamine B no loss of photocatalytic activity has been observed after five recycles although the mineralization degree progressively diminished along the recycles.

Oxidation and hot corrosion studies on Fe-based superalloy A-286 pulsed current GTA weldments in gas turbine environment

Cyclic air oxidation and hot corrosion performance of pulsed current gas tungsten arc weldment (PCGTAW) of Fe-based superalloy A-286 are evaluated in the air and Na2SO4–7.5%NaVO3–5%NaCl molten salt at 700 °C. Thermogravimetric analysis is carried out to evaluate the corrosion kinetics of the weldments. Scanning electron microscope, energy dispersive spectroscopy, and x-ray diffraction methods are used to investigate the surface morphology, composition and phases of the air oxidized and hot corroded weldments. The depth of corrosion attack and distribution of alloying elements in the oxidized and hot corroded weldments are investigated at the cross sections using SEM microstructure and elemental mapping analysis. Some oxide scales spalling and sputtering are observed in PCGTA weldment in the molten salt environment during hot corrosion study which is not observed in air oxidized weldment at the end of 50 cycles. The hot corroded weldment shows a higher weight gain than oxidized weldment. Presence of molten salt increases the rate of corrosion. The cross-sectional analysis clearly explains, in both the cases higher oxidation rate is observed in the base metal zone.

Metal Ion Sensing and Electrochemical Behavior of MOF Derived ZnCo2O4

A metal‐organic framework (MOF) with the formula {(H2pip)[Zn1/3Co2/3(pydc‐2,5)2(H2O)]·2H2O}{where H2pip = piperazinediium, pydc‐2,5 = pyridine‐2,5‐dicarboxylate}, 1, has been synthesized. To confirm the structure and phase purity of 1, the PXRD pattern of the synthesized compound has been compared with the simulated PXRD pattern generated from the single‐crystal X‐ray data of isomorphous pure Co compound synthesized by Niu and Co‐workers. Upon solid state annealing of the mixed‐metal precursor (MOF) at 400 °C for one hour, pure ZnCo2O4 was obtained. The phase purity of ZnCo2O4 was confirmed by powder X‐ray diffraction. The as obtained ZnCo2O4 was fully characterized using PXRD, SEM, TEM, and EDX elemental mapping analysis. The particle size is in the range of 22 nm‐40 nm with a dominant size of 30 nm. The emissive properties of nano‐sized ZnCo2O4 at 391 nm upon excitation at 310 nm have been probed for the luminescence‐based sensing of metal cations in aqueous medium. The metal ion sensing is based on the differential change in intensity, which in turn reflects the strength of the interaction between ZnCo2O4 and the metal ion. Such interactions can be rationalized within the framework of the ligand exchange rate as well as ionic radii of the aquated metal ions. Accordingly, Cu2+ and Hg2+ with highest ligand exchange rate exhibit maximum luminescence quenching, 71.7 % and 51 %, respectively. On the other hand, the nanostructured ZnCo2O4 also shows super capacitance behavior with a maximum energy density of 2.39 Wh kg–1 at a power density of 36.66 W kg–1.

Fluorescence-sensitive adsorbent based on cellulose using for mercury detection and removal from aqueous solution with selective "on-off" response.

A new fluorogenic bio-adsorbent was successfully synthesized for detection and adsorption of mercury ions in aqueous solution. It showed high sensitivity in removing Hg (II) at low concentration with a detection limit of 84 ppb which was below the maximum discharge standard in enterprise drain off water in China, besides, the adsorbent had good selectivity towards Hg (II) among numerous kinds of cations in water that it showed fluorescent quenching properties for Hg (II) ions due to photo-induced electron transfer. In addition, batch adsorption experiments were investigated to study the influence of initial concentration of metal ions, contact time, pH of the solution on the adsorption capacity. Equilibrium adsorption isotherms demonstrated the Hg (II) removing process fitted well with Langmuir isotherm model, and the maximum adsorption capacity for mercury was measured to be 143.88 mg/g. Furthermore, the adsorption kinetics was found to follow pseudo-second-order model. FTIR spectra and SEM-elemental mapping clearly confirmed the adsorbed heavy metal ions.

Three-dimensional VOx/NiS/NF nanosheets as efficient electrocatalyst for oxygen evolution reaction

Developing effective and robust electrocatalysts that are applicable for intense conditions is promising for variable industrial oxygen evolution reaction (OER). Herein, we have developed a simple hydrothermal strategy to construct a three dimensional nanoflower-like VOx nanosheets (VOx/NiS/NF) that utilizes S-modified NF as substrate. NiS/NF can provide not only high-surface area for the growth of VOx but also better conductivity and stability derived from NiS. XRD shows the formation of amorphous VOx supported on NiS/NF. XPS confirms the existence and valence state of V, Ni and S. EDX and SEM elemental mapping reveal the composition and great distribution of V, O, Ni and S. SEM and TEM show that the thin VOx nanosheets covered on the surface of NiS/NF uniformly, which implying more exposed active sites. OER measurements display that VOx/NiS/NF has the outstanding catalytic activity with the lower overpotential (330 mV, 50 mA cm−2), smaller tafel slope (121 mV dec−1) and lower value of semicircle of EIS than VOx/NF. The modification of NF may be the key for enhancement performances for OER due to reduced charge transfer resistance. The strong durability of VOx/NiS/NF may be attributed to the tighter integration between VOx and NiS/NF in alkaline electrolytes. The impressive results may provide a new strategy to design suitable substrate with good dispersion and conductivity to prepare effective electrocatalysts for OER.

The role of the polymeric network in the water sensitivity of modern oil paints

Spectroscopic and mass spectrometric analytical techniques were used to characterise two naturally aged Winsor & Newton (W&N) Winsor Green (phthalocyanine green, PG7) artists’ oil colour paint swatches dating to 1993 and 2003. Infrared and Energy Dispersive X-ray (EDX) analysis indicated that the swatches were of closely similar composition, yet the swatch from 2003 was water-sensitive whilst the swatch from 1993 was not. Water-sensitivity is a conservation challenge associated with significant numbers of modern oil paintings and this study aimed to further develop our understanding of the molecular causes of water sensitivity. SEM elemental mapping of samples taken from both swatches provided no indication for the formation of epsomite – a known cause of water sensitivity in some modern oil paintings. Liquid chromatography coupled with mass spectrometry (HPLC-MS) and gas chromatography coupled with mass spectrometry (GC-MS) also revealed very similar qualitative-quantitative composition in terms of unbound and esterified medium fractions. The polymeric network was investigated using analytical pyrolysis. A combination of flash pyrolysis coupled with gas chromatography mass spectrometry (Py-GC-MS) together with evolved gas analysis mass spectrometry (EGA-MS) revealed that the polymeric material was relatively more abundant in the non-water-sensitive paint. This is the first multi-analytical study that has demonstrated a correlation between water-sensitivity and the degree of polymerisation of the oil medium; independent of other known causes of water-sensitivity.

Triphenyl(3-sulfopropyl)phosphonium trinitromethanide as a novel nanosized molten salt: Catalytic activity at the preparation of dihydropyrano[2,3-c]pyrazoles

In this paper, designing, preparation and characterization of a unique nanosized molten salt namely triphenyl(3-sulfopropyl)phosphonium trinitromethanide (TPSPPTNM) was reported. The successful formation of nanosized catalyst was verified by using suitable skills like fourier transform infrared spectroscopy (FT-IR), proton, carbon and phosphor NMR, X-ray diffraction patterns (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDX), SEM elemental mapping, high resolution transmission electron microscopy (HRTEM), thermogravimetry (TG) and derivative thermogravimetry (DTG) analysis. The catalytic application of the novel molten salt was explored towards the synthesis of pyrano[3,2-c]pyrazole derivatives under mild and green reaction conditions.

Trichloroacetic acid-modulated synthesis of polyoxometalate@UiO-66 for selective adsorption of cationic dyes

In this study, POM@UiO-66 nanoparticles were fabricated by encapsulation of POM (K6P2W18O62 polyoxometalate) into mesoporous UiO-66 metal organic framework through a solvothermal method with trichloroacetic acid as a modulator to promote the defects formation of UiO-66. The as-prepared samples were characterized by TEM, SEM, PXRD, TG, XPS, and EDX elemental mapping, and the successful combination of POM and UiO-66 was confirmed. Two cationic dyes, rhodamine B and malachite green, and one anionic dye orange G were employed to investigate the adsorption performance of POM@UiO-66. The adsorption data showed that the removal process of cationic dyes by POM@UiO-66 matched well with the pseudo-second-order model and Langmuir isothermal model. The resulting POM@UiO-66 nanoparticles exhibited high adsorption to cationic dyes but low adsorption to anionic dyes, and the adsorption capacities of rhodamine B, malachite green, and anionic dye orange G were 222.6, 190.6 and 40 mg g−1, respectively. Furthermore, the cationic dyes could be selectively removed from a cationic-anionic dye binary system. These results suggested that the novel polyoxometalate-based UiO-66 material is a promising candidate for the adsorption of cationic dyes from effluent.

N-Carbamoylmaleimide-treated carbon dots: stabilizing the electrochemical intermediate and extending it for the ultrasensitive detection of organophosphate pesticides.

To date, numerous methods have been reported for the detection of organophosphorus pesticides (OP) due to their severe potential hazard to the environment, public health and national security. However, very few works have ever found that the signal loss of thiocholine (TCh) during electrochemical processing is a key factor leading to the low sensitivity of acetylcholinesterase (AChE)-based OP electrochemical sensing platforms. Herein, we propose an ultrasensitive detection method for multiple OPs including parathion-methyl, paraoxon, dimethoate and O,O-dimethyl-O-2,2-dichlorovinyl-phosphate using N-carbamoylmaleimide-functionalized carbon dots (N-MAL-CDs) as a nano-stabilizer. For the first time, Michael addition is introduced into an AChE-based OP electrochemical sensing platform to enrich the electrochemical intermediate TCh. The Michael addition between TCh and N-MAL-CDs is demonstrated via XRD, FTIR, SEM and EDS elemental mapping experiments. Due to the stabilization and enhancement of TCh with N-MAL-CDs, the as prepared OP sensing platform achieves ultrahigh sensitivity by detecting the initial electrochemical signals of TCh without signal loss, showing a wide linear range of 3.8 × 10-15-3.8 × 10-10 M for parathion-methyl and 1.8 × 10-14-3.6 × 10-10 M for paraoxon, with a limit of detection of 1.4 × 10-15 M for parathion-methyl and 4.8 × 10-15 M for paraoxon.

An efficient catalytic method for the synthesis of pyrido[2,3‐d]pyrimidines as biologically drug candidates by using novel magnetic nanoparticles as a reusable catalyst

A convenient method for the synthesis of pyrido[2,3‐d]pyrimidines by using the novel nano‐magnetic silica‐bonded S‐sulfonic acid[Fe3O4@SiO2@(CH2)3S–SO3H] as an efficient and recyclable catalyst under neat conditions is described. The major advantages of the present methodology are high yield, short reaction time, and reusability of the catalyst. Furthermore, the nano‐magnetic silica‐bonded S‐sulfonic acid was fully characterized by using various techniques such as FT‐IR, TG/DTG, DTA, EDX, μXRF, XRD, HRTEM, SEM, SEM elemental mapping, XPS, and N2 physisorption. The results obtained from this research support the idea of rational design, synthesis, and applications of task‐specific and reusable catalysts for the preparation of various polynitrogenated heterocyclic compounds containing 1,4‐dihydropyridine moieties.

Amorphous Iron-Nickel (oxo)Hydroxide Nano-Particles Immobilized on SnO2 Nanotube Arrays As an Integrate Anode for Oxygen-Evolution Reaction

Key words: Oxygen evolution, Nanotube arrays, electro-catalysis Development of efficient and earth abundant electro-catalysts for oxygen evolution reaction (OER) greatly hampered the realistic large scale production of hydrogen by electrolysers.[1] Bimetal iron/nickel (oxo)hydroxide represents a promising OER catalyst for its high intrinsic activity and stability.[2] To enhance its conductivity and density of active sits, we rationally immobilized amorphous FexNi(1-x)OOH nano-particles on SnO2 nanotube arrays by a mild all solution process. The SnO2 layer does not only function as a conductive matrix, but also guarantee the successful in-situ decoration of FexNi(1-x)OOH species instead of oxidative corrosion of the Nickel foam substrate by FeCl3 in the solution. Multiple physical characterizations confirmed the successful construction of the tubular architecture of SnO2 and the even dispersing of FexNi(1-x)OOH particles (SEM, TEM, XPS and Raman etc.). Its outstanding catalytic activity in basic solution in terms of a quite low overpotential of 250 mV at 50 mA cm-2 was demonstrated by electrochemical measurements (fig.1-h), and was ensured benefiting from the amorphous nature of FexNi(1-x)OOH nano-particles and the elegant tubular array micromorphology feature. Fig. 1. SEM image (a, b) and element mapping (c, d, e, f and g) of NixFe(1-x)OOH/SnO2 nanotube arrays; (h) Linear Sweep Voltammetry (LSV) curves of NixFe(1-x)OOH@SnO2 NTA/Ni foam (purple), NiOOH@SnO2 NTA/Ni foam (blue), FeOOH@SnO2 NP/Ni foam (green), SnO2 NTA/Ni foam (red line) and bare Ni foam (black line) in alkaline solution. Dash line shows the LSV curve of NixFe(1-x)OOH@SnO2 NTA/Ni foam in the same solution with 70% iR compensation,. Condition: 1.0 M KOH. Scan rate 5 mV s-1. Reference: [1]. Nian-Tzu Suen, Sung-Fu Hung, Quan Quan, Nan Zhang, Yi-Jun Xu, Hao Ming Chen, Chem. Soc. Rev., 2017, 46, 337—365. [2]. Shihui Zou, Michaela S. Burke, Matthew G. Kast, Jie Fan, Nemanja Danilovic, Shannon W. Boettcher, Chem. Mater. 2015, 27, 8011−8020. Figure 1

Trimetallic Ni[sbnd]Fe[sbnd]Co selenides nanoparticles supported on carbon fiber cloth as efficient electrocatalyst for oxygen evolution reaction

Trimetallic NiFeCo selenides (NiFeCoSex) anchored on carbon fiber cloth (CFC) as efficient electrocatalyst for oxygen evolution reaction (OER) in alkaline medium have been synthesized via a facile two-step method. Firstly, trimetallic NiFeCo (oxy) hydroxides have been electrodeposited on CFC support (NiFeCo/CFC). Secondly, a solvothermal selenization process has been used to convert NiFeCo/CFC into NiFeCoSex/CFC using N, N-dimethylformamide (DMF) as solvent. The composition and homogeneous distribution of NiFeCoSex/CFC nanoparticles are determined by XRD, XPS, SEM elemental mapping and EDX images. Furthermore, SEM images reveal that NiFeCoSex/CFC has volcano-shaped morphology with rough surface and homogenously distributed on the surface of CFC, which may provide more active sites for OER. The electrochemical measurements show that trimetallic NiFeCoSex/CFC possesses the better electrocatalytic activity with the lower overpotential (150 mV at 10 mA cm−2), Tafel slope (85 mV dec−1), larger double-layer capacitance (200 mF cm−2) and long-term stability than unary or binary metal selenides. The enhanced activity of NiFeCoSex/CFC may be attributed to the trimetallic NiFeCo selenides and selenides-CFC synergistic interaction. It may offer a promising way to design transition multimetallic selenides supported on conductive support as electrocatalysts for OER.

One step NaBH4 reduction of Pt-Ru-Ni catalysts on different types of carbon supports for direct ethanol fuel cells: Synthesis and characterization

The ternary catalyst Pt75Ru5Ni20 was conducted on various types of carbon supports including functionalized Vulcan XC-72R (f-CB), functionalized multi-walled carbon nanotubes (f-MWCNT), and mesoporous carbon (PC-Zn-succinic) by sodium borohydride chemical reduction method to improve the ethanol electrooxidation reaction (EOR) for direct ethanol fuel cell (DEFC). It was found that the particle size of the metals on f-MWCNT was 5.20 nm with good particle dispersion. The alloy formation of ternary catalyst was confirmed by XRD and more clearly described by SEM element mapping, which was relevant to the efficiency of the catalysts. Moreover, the mechanism of ethanol electrooxidation reaction based on the surface reaction was more understanding. The activity and stability for ethanol electrooxidation reaction (EOR) were investigated using cyclic voltammetry and chronoamperometry, respectively. The highest activity and stability for EOR were observed from Pt75Ru5Ni20/f-MWCNT due to a good metal-carbon interaction. Ru and Ni presented in Pt-Ru-Ni alloy improved the activity and stability of ternary catalysts for EOR. Moreover, the reduction of Pt content in ternary catalyst led to the catalyst cost deduction in DEFC.

Electrochemical Properties of Porous V2O5/Sulfur/Carbon Composite Electrode Prepared Using a Combination of Aerosol and Powder Technologies

Porous nanostructured vanadium pentoxide (PN-V2O5) prepared by a novel spray pyrolysis was used to synthesize sulfur/carbon/PN-V2O5 (S/C/PN-V2O5) composite through heat treatment and the effect of heat treatment parameters (e.g. heat treatment temperature and heat treatment time) and porous structure of V2O5 on physical and electrochemical properties of S/C/PN-V2O5 composites were investigated. The X-Ray Diffraction results reveal that higher heat treatment temperature of 200 ºC or long heat treatment time (10 h) can promote the chemical reactions between S and V2O5. The Energy Dispersive Spectrometer images of the S/C/PN-V2O5 composite heat treated at 160 ºC for 2 h demonstrated a generally good distribution of three components. The cross-sectional SEM images and elemental mapping analysis revealed the partial penetration of S into PN-V2O5. The electrochemical performance indicated the S/C/PN-V2O5 electrode displayed a discharge capacity of 666 mAh g−1 after 50 cycles which was higher than that of S/C electrode (379 mAh g−1).

Facile synthesis of pyrite-type binary nickel iron diselenides as efficient electrocatalyst for oxygen evolution reaction

Pyrite-type binary nickel iron diselenides (Ni0.5Fe0.5Se2) supported on carbon fiber cloth (CFC) as electrocatalysts for oxygen evolution reaction (OER) have been prepared by a facile two-step process. Firstly, binary Ni0.5Fe0.5 hydroxide nanosheets have been electrodeposited on CFC. Secondly, a solvothermal selenization process has been used to convert Ni0.5Fe0.5/CFC into Ni0.5Fe0.5Se2/CFC. XRD shows that Ni0.5Fe0.5Se2 on CFC has the typically octahedral crystalline. XPS proves the existence and valence of Ni, Fe and Se. SEM images show that Ni0.5Fe0.5Se2 has novel pyrite-type octahedral morphology with uniform size and good dispersion on the surface of CFC. SEM elemental mapping images confirm the good distribution of Ni, Fe, Se element on CFC. TEM and SAED provide the clear diffraction rings of octahedral Ni0.5Fe0.5Se2, which is consistent with the results of XRD. Furtherly, the effect of different ratio of Ni/Fe (NixFe1-xSe2 x=0, 0.2, 0.5, 0.8, 1) on OER performances has been systematically investigated. The electrochemical measurements results show that Ni0.5Fe0.5Se2/CFC (x=0.5) possesses the better electrocatalytic activity with the lower overpotential, Tafel slope and long-term stability than other samples. The enhanced activity of Ni0.5Fe0.5Se2/CFC may be attributed to the intrinsic activity of binary Ni0.5Fe0.5Se2 and faster electron transfer rate derived from CFC support.

Environmentally Benign Bioderived Carbon Microspheres-Supported Molybdena Nanoparticles as Catalyst for the Epoxidation Reaction

A one-pot synthesis of molybdenum oxide nanoparticles (NPs) supported on bioderived carbon microspheres is reported. The catalyst was synthesized by the low temperature hydrothermal (LTH) method using d-glucose and bagasse as the carbon source. The carbonization of bagasse resulted in the formation of nonuniform carbon microspheres while glucose resulted in uniform carbon spheres. SEM and STEM elemental mapping show the uniform distribution of molybdenum oxide NPs over the carbon microspheres. XPS spectroscopy confirmed that molybdenum was in the Mo6+ oxidation state. The 1% MoO3 supported on carbon microspheres derived from d-glucose showed excellent catalytic activity up to 100% olefin conversion with 100% epoxide selectivity using organic tert-butyl hydroperoxide as an oxidant. The catalyst was successfully used for up to five cycles without losing substantial activity and selectivity.

Dual functions of TiC nanoparticles on tribological performance of Al/graphite composites

In this study, the effect of TiC nanoparticles as a reinforcement on the mechanical and tribological properties of Aluminum-based self lubricating composite was investigated. The microstructure, relative density, hardness, and tribological properties of Al/graphite and Al/TiC/graphite composites were examined as a function of graphite content. The tribo-surfaces of the samples were analyzed using SEM and EDS elemental mapping. The results indicated that the addition of TiC nanoparticles not only decreased the wear rate and coefficient of friction of the composites, but also facilitated the formation of a stable graphite layer at longer sliding distances and high sliding velocities by forming a durable graphite/TiC composite on the tribo-surface. Therefore, the stability of graphite layer can be considered as a possible cause for decrease in wear rate of the Al/TiC/graphite composite.

Effect of Sc on microstructure and mechanical properties of as-cast Al–Mg alloys

The effect of Sc addition on microstructure and mechanical properties of as-cast Al–Mg alloys was investigated based on optical microscopy (OM), scanning electron microscopy (SEM), electron back-scatter diffraction (EBSD) and properties testing. The results showed that a remarkable grain refining effect was observed for Sc content greater than 0.4wt.%, changing typical dendritic microstructure into fine equiaxed grains. Such effect was found to be related to the formed primary particles, which hindered the undesirable diffusion and subsequent crystal growth and acted as potent heterogeneous nucleation sites for α-Al matrix during solidification. In addition, these particles could cause a significant refinement strengthening effect. Atomic force microscopy (AFM) and SEM-elemental mapping were employed to investigate the internal structure and elemental distribution of these particles. They could be identified as the eutectics consisted of Al3Sc and α-Al phases rather than individual Al3Sc phase, which exhibited an ‘Al3Sc+α-Al+Al3Sc⋯’ multilayer structure.

Formation of the eutecticum with multilayer structure during solidification in as-cast Al–Mg alloy containing a high level of Sc

An addition of a high level of 0.6wt% Sc imposed a remarkable grain refining effect on Al-5Mg alloy for as-cast condition, changing typical dendritic microstructure into fine equiaxed grains. Such effect was found to be related to the extensively formed Sc-rich particles. Electron back-scatter diffraction (EBSD), Atomic force microscopy (AFM) and SEM-elemental mapping were employed to investigate the inner structure of these particles and their role in grain refining. They could be identified as some eutectic structure consist of multilayer of ‘Al3Sc+α-Al+Al3Sc····’, which shows good consistency in orientation both in the particle and matrix.

Protective properties of functionalised tetrazine on an aerospace aluminium alloy (AA 2024-T3)

Environmental health concerns over conventional chromium based surface treatments on aluminium substrates are well known. Current research efforts have concentrated on developing protective technologies for multiple applications. Such properties would enable manufacturers to address both corrosion and bacterial threats in areas such as fuel tanks and delivery systems.The present study explores the anticorrosion properties of 1,2-dihydro 1, 2, 4, 5 tetrazine-3, 6-dicarboxylic acid (H2DCTZ) on a copper rich aerospace aluminium alloy (AA 2024-T3). Furthermore the antimicrobial activity of the tetrazine is evaluated against Gram-positive and Gram-negative bacteria, both capable of inducing corrosion. The protective action of the tetrazine was investigated at different concentrations in a chloride ion rich environment (3.5% (w/v) NaCl) utilising electrochemical impedance spectroscopy (EIS). Results over a 72 h period proved that an optimum concentration was 500 ppm. FTIR and SEM elemental mapping of the surface confirmed the nitrogen rich tetrazine affinity for the copper rich intermetallic sites, through coordinate bonds, which delayed corrosion onset and reduced pit formation. Moderate antibacterial tetrazine activity was observed against Escherichia coli and 100% efficacy against Staphylococcus aureus at 250 ppm was achieved. The damage of the bacterial cell envelope at the critical concentrations (250 ppm) is proposed as a possible mechanism for antibacterial action.