pH dependent catalytic redox properties of Mn3O4 nanoparticles

Gagrani, Ankita; Ding, Bolun; Wang, Yang; Tsuzuki, Takuya

doi:10.1016/j.matchemphys.2019.04.017

Cited by 16 publications

(3 citation statements)

References 49 publications

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“…Chemical precipitation from aqueous solutions is used for the fabrication of Mn 3 O 4 for applications in supercapacitors and batteries. Synthesis is usually performed by the pH adjustment of Mn 2+ salt solutions [11] and precipitation at pH = 9-10, which is significantly higher than the isoelectric point of Mn 3 O 4 and other manganese oxides [12,13]. As a result, the synthesized particles are negatively charged.…”

Section: Introductionmentioning

confidence: 99%

Overcoming Challenges in Development of Manganese Oxide Supercapacitor Cathodes by Alkali-Free Hydrothermal Synthesis

Awad

Nawwar²,

Zhitomirsky

2023

Batteries

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This investigation is motivated by the need in the development of manganese oxide cathodes for supercapacitors with high capacitance at high charge–discharge rates and enhanced capacitance retention in a wide range of charge–discharge rates. It also addresses the challenge of eliminating the time-consuming activation procedure, which limits the applications of Mn3O4 cathodes. The new approach is based on the use of environmentally friendly and biocompatible pH modifiers–dispersants, such as polyethylenimine (PEI) and meglumine (MG) for hydrothermal synthesis. In this approach, the use of inorganic alkalis is avoided. We demonstrate the benefits of this approach for the fabrication of manganese oxide nanoparticles, such as Mn-PEI and Mn-MG. Electrodes with a high active mass of 40 mg cm−2 are fabricated and electrochemically tested in 0.5 M Na2SO4 electrolyte. The method of electrode material fabrication offers benefits for the accelerated electrode activation procedure, which is practically eliminated for Mn-MG electrodes. The Mn-MG electrodes showed a remarkably high capacitance of 3.68 F cm−2 (93.19 F g−1) at a sweep rate of 100 mV s−1 and a high capacitance retention of 90.6% in the CV sweep range of 1–100 mV s−1.

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Section: Introductionmentioning

confidence: 99%

Overcoming Challenges in Development of Manganese Oxide Supercapacitor Cathodes by Alkali-Free Hydrothermal Synthesis

Awad

Nawwar²,

Zhitomirsky

2023

Batteries

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“…Manganese-based materials have unique redox properties which give significant importance in the applications related to energy, environment, and biomedical fields [11] Mn 3 O 4 nanomaterial is also known as the oxidizing and reducing agent, and it is a spinel-structured stable oxide with unique catalytic, electrochemical, and magnetic properties. It is a p-type semiconductor having a larger bandgap of 2.3 eV which provides supercapacitor properties to it [12].…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide-Mn₃O₄ nanocomposites for advanced electrochemical biosensor for fumonisin B1 detection

et al. 2023

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Occurrence of mycotoxins in food samples threat to its safety issue due to the presence of high toxicity and carcinogenic behavior, thus requiring highly sensitive and selective detection. Herein, the trimanganese tetraoxide (Mn3O4) nanoparticles in combination with graphene oxide (GO) nanocomposite were used to enhance the electrochemical performance for fabrication of electrochemical biosensor for fumonisin B1 (FB1) detection. The various characterization tools were used to validate the fabrication of GOMn3O4 nanocomposites. To fabricate the electrochemical biosensor on an indium tin oxide (ITO) coated glass substrate, a thin film of GOMn3O4 nanocomposite was prepared using electrophoretic deposition (EPD) technique, and antibodies (ab-FB1) were immobilized onto the electrode for selective FB1 detection. The differential pulse voltammetry (DPV) technique was used to observe the sensing performance. The non-binding sites of the ab-FB1 on the immunoelectrode were blocked with bovine serum albumin (BSA). The biosensor electrode was fabricated as BSA/ab-FB1/GOMn3O4/ITO for the detection of FB1. The sensitivity of the biosensor was obtained as 10.08 µA mL ng-1 cm-2 in the detection range of 1 pg mL-1 to 800 ng mL-1 with a limit of detection (LOD) of 0.195 pg mL-1. In addition, the recovery of BSA/ab-FB1/GOMn3O4/ITO immunoelectrodes was also performed on sweet corn samples and is calculated to be 98.91%.

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“…[ 10 ] Among these manganese oxides, Mn 3 O 4 is an interesting material for researchers because of its remarkable surface area and unique electronic structure at nanoscale, which is suitable for wide applications, such as its use as a thermochemical energy storage material [ 11 ] and many applications in the field of biomedicine. [ 12 ] Mn 3 O 4 is a stable oxide with spinel structure. It also has catalytic and electrochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Mn₃O₄/CoS₂ as a Promising Photocatalytic Material for Boosting Visible‐Light Photocatalytic Hydrogen Production

Liu

et al. 2021

Physica Status Solidi (a)

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Photocatalytic hydrogen evolution has received extensive attention for energy conversion and storage of clean energy. Herein, the composite catalyst Mn3O4/CoS2 is successfully prepared by a hydrothermal method. Photocatalytic hydrogen evolution experiments are conducted by adjusting the amount of Mn3O4. The results show that the composite photocatalyst Mn3O4/CoS2 has higher photocatalytic hydrogen evolution performance. The hydrogen production of the 50 mg Mn3O4/CoS2 composite catalyst at 5 h is 14.95 times and 1.60 times that of pure Mn3O4 and CoS2, respectively, indicating that the 50 mg Mn3O4/CoS2 composite catalyst has good photocatalytic stability. In addition, the structure, morphology, and composition of the prepared catalysts are characterized by scanning electron microcopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), electrochemical and PL techniques. Compared with Mn3O4 and CoS2, the photocatalytic response of the 50 mg Mn3O4/CoS2 composite catalyst is significantly enhanced, the current density is increased, the fluorescence quenching efficiency is accelerated, and the pore volume and pore size are increased. Therefore, the composite catalyst can accelerate the separation and transfer of photogenerated electrons and holes and improve the photocatalytic efficiency.

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pH dependent catalytic redox properties of Mn3O4 nanoparticles

Cited by 16 publications

References 49 publications

Overcoming Challenges in Development of Manganese Oxide Supercapacitor Cathodes by Alkali-Free Hydrothermal Synthesis

Overcoming Challenges in Development of Manganese Oxide Supercapacitor Cathodes by Alkali-Free Hydrothermal Synthesis

Graphene oxide-Mn₃O₄ nanocomposites for advanced electrochemical biosensor for fumonisin B1 detection

Hydrothermal Synthesis of Mn₃O₄/CoS₂ as a Promising Photocatalytic Material for Boosting Visible‐Light Photocatalytic Hydrogen Production

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pH dependent catalytic redox properties of Mn3O4 nanoparticles

Cited by 16 publications

References 49 publications

Overcoming Challenges in Development of Manganese Oxide Supercapacitor Cathodes by Alkali-Free Hydrothermal Synthesis

Overcoming Challenges in Development of Manganese Oxide Supercapacitor Cathodes by Alkali-Free Hydrothermal Synthesis

Graphene oxide-Mn3O4 nanocomposites for advanced electrochemical biosensor for fumonisin B1 detection

Hydrothermal Synthesis of Mn3O4/CoS2 as a Promising Photocatalytic Material for Boosting Visible‐Light Photocatalytic Hydrogen Production

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Product

Resources

About

Graphene oxide-Mn₃O₄ nanocomposites for advanced electrochemical biosensor for fumonisin B1 detection

Hydrothermal Synthesis of Mn₃O₄/CoS₂ as a Promising Photocatalytic Material for Boosting Visible‐Light Photocatalytic Hydrogen Production