Electro-oxidation of hydrazine on NiFe2O4-rGO as a high-performance nano-electrocatalyst in alkaline media

Askari, Mohammad Bagher; Salarizadeh, Parisa; Beitollahi, Hadi; Tajik, Somayeh; Eshghi, Abolfath; Azizi, Sadegh

doi:10.1016/j.matchemphys.2021.125313

Cited by 41 publications

(11 citation statements)

References 44 publications

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“…Preparation Maximum Peak (mA*cm À 2 ) Reference poly(P-phenylenediamine/ZnO) (PpPD/ZnO) dope 0.172 [32] AuPd DANCs co-reduction 9.57 [27] VGNH-45 PECVD hydrothermal method 13 [33] Benzothiophene organic synthesis 4.95 [31] MnO/N-C dope 6.3 [34] NiFe2O4-rGO hydrothermal method 18.9 [35] Flower-shaped CuO dope 5.23 [36] Figure 1. Artemisinin and known semi-synthetic derivatives ChemistrySelect of artemisinin, dihydroartemisinin, artesunate, and artemether have been developed with the aim of increasing the pharmacological activity and the pharmacokinetic profile of the main drug (Figure 1).…”

Section: Catalystmentioning

confidence: 99%

Synthesis of Novel Artemisinin Derivatives and Their Electrochemical Properties

et al. 2022

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In present, new artemisinin-based organic compounds (1-6) are designed and synthesized in excellent yields (up to 97 %) via Steglich Esterification reactions. All new artemisinin derivatives are tested as anode catalysts for hydrazine electrooxidation reactions with electrochemical methods in 1 M KOH/ 0.5 M N 2 H 4 solution. Hybrid molecule 1 exhibits the best catalytic activity in hydrazine electrooxidation reaction with 2.28 mA cm À 2 value. Moreover, response surface methodology (RSM) is applied to investigate of optimum electrode conditions. By using optimum conditions, hydrazine electrooxidation is obtained as 3.55324 mA cm À 2 . As a result, artemisininbased hybrid compounds may be alternative, and nextgeneration anode catalyst for direct hydrazine fuel cells.

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Section: Catalystmentioning

confidence: 99%

Synthesis of Novel Artemisinin Derivatives and Their Electrochemical Properties

et al. 2022

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“…[45] Spin current will be generated since the moving spin is polarized when a spin passes through chiral nanomaterials. [46][47][48][49][50][51] In Figure 2a, a model of chiral spin for CMONs is depicted, where the transfer efficiency of electrons is determined by the handedness of CMONs and the classical centripetal Lorentz force. The induced chiral electric current breaks the symmetric interaction of spin and magnetic field, leading to a selected spin direction in chiral nanomaterials known as the chiral-induced spin selection (CISS) effect.…”

Section: Introductionmentioning

confidence: 99%

Chiral Magnetic Oxide Nanomaterials: Magnetism Meets Chirality

Liu

Mourdikoudis

et al. 2023

Advanced Optical Materials

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Chiral magnetic oxide nanomaterials (CMONs), which combine the beneficial effects of chirality and magnetism in a single unit, have found applications in biomedical, optical, and electronic devices as well as in catalysis and sensing. This is largely due to the simultaneous presence of magnetic properties, catalytic activity, biocompatibility and optical activity, or magneto‐optical effects, which are circular polarization and magnetization dependent. This review summarizes the key findings derived from recent research works on the synthesis, properties, and applications of CMONs. The three main approaches in the synthesis and property tuning of CMONs, namely, post‐functionalization, in situ approach, and assembly with soft templates, are discussed. A summary and some future prospects of the CMONs with respect to their synthetic routes, chirality origin, and applications are also provided.

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“…to minimize overpotentials in the anodic process and the use of economic, abundant, and multifunctional nonprecious first–row transition metal-based electrocatalysts to overcome the sluggishness of both OER and ORR. − Among the small molecules, hydrazine, which is fluid over a broad range of temperature 213–392 K, with high hydrogen content (12.5 wt %), electromotive force (1.56 V), and energy density (5500 W h L –1 ), environmentally benign safe products N 2 and H 2 , safe storage as a solid hydrazone form (>CN–NH 2 ), and easy regeneration, makes it a promising fuel feedstock . Generally, the reactions that occur at the anode and cathode of hydrazine-based fuel cells are , a n o d e : N 2 H 4 + 4 normalO normalH − → N 2 + 4 H 2 normalO + 4 e − ( − 0.33 V normalv normals normalR normalH normalE ) c a t h o d e : O 2 + 2 H 2 normalO + 4 e − → 4 normalO normalH − ( 0.401 V normalv normals normalR normalH normalE ) …”

Section: Introductionmentioning

confidence: 99%

MnO₂ Nanorods on Mesoporous Carbon as a Bifunctional Electrocatalyst for Hydrazine Oxidation and Oxygen Reduction Reactions in Alkaline Media

Ghosh,

Banerjee,

Bhaduri

et al. 2023

ACS Appl. Nano Mater.

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Hydrogen production via water splitting is instrumental in harvesting zero-carbon green energy. Hydrazine oxidation reaction (HzOR) is recognized as a replacement for the slothful anodic oxygen evolution reaction. However, agonizingly, HzOR gets hampered due to its high working potential in contrast to its low theoretical value and the usage of high-cost precious metal-based electrocatalysts to lower the overpotential. Additionally, the slow nature of the cathodic oxygen reduction reaction (ORR) is experienced by noble metal (Pt)-based catalysts, which have the shortcomings of being uneconomical and suffer from the methanol crossover effect. Thus, developing nonprecious metal-based economic bifunctional electrocatalysts catalyzing HzOR and ORR is imperative. Herein, we designed a simple strategy to synthesize manganese oxide nanorods loaded in mesoporous carbon (CKT) as a bifunctional electrocatalyst for boosting the anodic HzOR and cathodic ORR in alkaline media. The as-synthesized MnO 2 /CKT nanocomposite shows excellent response toward HzOR with a low onset potential of 0.7 V vs RHE and achieved a current density of 10 mA cm −2 at a potential of 0.88 V vs RHE. MnO 2 /CKT nanocomposite also displayed a Tafel slope (105 mV decade −1 ) and a maximum current density of 25.6 mA cm −2 at a potential of 1.4 V vs RHE in the presence of 50 mM hydrazine hydrate in 1 M KOH. Furthermore, the MnO 2 /CKT electrocatalyst can also reduce molecular oxygen with similar efficiency to the state-of-the-art Pt/C catalyst through an efficient 4-electron pathway with an improved onset potential of 0.95 V vs RHE and a current density of −4.5 mA cm −2 in O 2saturated 0.1 M KOH. The electrochemical impedance spectroscopy and chronoamperometric (i−t) responses of the electrocatalyst showed the feasibility of rapid electron transfer and high stability at the interface. The promising bifunctional electrocatalytic efficiency of the unique MnO 2 /CKT nanocomposite initiates from the synergetic physicochemical characteristics of MnO 2 and CKT, enabling smooth analyte diffusion with low charge transfer resistance and offering a superior quantity of active sites for the catalytic reactions.

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Electro-oxidation of hydrazine on NiFe2O4-rGO as a high-performance nano-electrocatalyst in alkaline media

Cited by 41 publications

References 44 publications

Synthesis of Novel Artemisinin Derivatives and Their Electrochemical Properties

Synthesis of Novel Artemisinin Derivatives and Their Electrochemical Properties

Chiral Magnetic Oxide Nanomaterials: Magnetism Meets Chirality

MnO₂ Nanorods on Mesoporous Carbon as a Bifunctional Electrocatalyst for Hydrazine Oxidation and Oxygen Reduction Reactions in Alkaline Media

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Electro-oxidation of hydrazine on NiFe2O4-rGO as a high-performance nano-electrocatalyst in alkaline media

Cited by 41 publications

References 44 publications

Synthesis of Novel Artemisinin Derivatives and Their Electrochemical Properties

Synthesis of Novel Artemisinin Derivatives and Their Electrochemical Properties

Chiral Magnetic Oxide Nanomaterials: Magnetism Meets Chirality

MnO2 Nanorods on Mesoporous Carbon as a Bifunctional Electrocatalyst for Hydrazine Oxidation and Oxygen Reduction Reactions in Alkaline Media

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Product

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About

MnO₂ Nanorods on Mesoporous Carbon as a Bifunctional Electrocatalyst for Hydrazine Oxidation and Oxygen Reduction Reactions in Alkaline Media