Facile construction of Mn3O4-MnO2 hetero-nanorods/graphene nanocomposite for highly sensitive electrochemical detection of hydrogen peroxide

Zeng, Fanyan; Pan, Yang; Yang, Yong; Li, Qinliang; Li, Gangyong; Hou, Zhaohui; Gu, Grace X.

doi:10.1016/j.electacta.2016.03.031

Cited by 63 publications

(39 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Mn2p 3/2 peaks for δ‐MnO 2 at discharge status I exhibit a dominated peak at 642.5 eV with a shoulder at 641.6 eV, which are ascribed to the existence of Mn 4+ and Mn 3+ , respectively, in δ‐MnO 2 electrode after initial Zn 2+ intercalation. The Mn 2p 3/2 peak significantly shifted to the lower binding energy with a dominated reduced peak of Mn 3+ (641.6 eV) at the end of discharge (state IV); and it changed back to the original binding energy in the charge process (state VIII) along with the Mn oxidized to its initial state. The reversible valence status change for Mn 2p further confirms the reversible joint charge storage in δ‐MnO 2 structure.…”

supporting

confidence: 85%

Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries

et al. 2019

View full text Add to dashboard Cite

Aqueous rechargeable zinc–manganese dioxide batteries show great promise for large‐scale energy storage due to their use of environmentally friendly, abundant, and rechargeable Zn metal anodes and MnO2 cathodes. In the literature various intercalation and conversion reaction mechanisms in MnO2 have been reported, but it is not clear how these mechanisms can be simultaneously manipulated to improve the charge storage and transport properties. A systematical study to understand the charge storage mechanisms in a layered δ‐MnO2 cathode is reported. An electrolyte‐dependent reaction mechanism in δ‐MnO2 is identified. Nondiffusion controlled Zn2+ intercalation in bulky δ‐MnO2 and control of H+ conversion reaction pathways over a wide C‐rate charge–discharge range facilitate high rate performance of the δ‐MnO2 cathode without sacrificing the energy density in optimal electrolytes. The Zn‐δ‐MnO2 system delivers a discharge capacity of 136.9 mAh g−1 at 20 C and capacity retention of 93% over 4000 cycles with this joint charge storage mechanism. This study opens a new gateway for the design of high‐rate electrode materials by manipulating the effective redox reactions in electrode materials for rechargeable batteries.

show abstract

supporting

confidence: 85%

Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries

et al. 2019

View full text Add to dashboard Cite

show abstract

“…[22] To identify the possible interaction, chemical states of Mn and Pt on surfaces of the Pt/Mn 3 O 4 were tested. [42] The area ratio (molar ratio) of Mn 2 + , Mn 3 + and Mn 4 + is around 1 : 1 : 3, being well consistent with the theoretical value of Mn 3 O 4 . [10,12] Three fitting peaks, i. e. Mn 2 + (640.9 eV), Mn 3 + (641.8 eV) and Mn 4 + (642.9 eV), are created in Mn 2p 3/2 region.…”

Section: Resultssupporting

confidence: 87%

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn₃O₄ for Methanol Electrooxidation

Zhong

Xiong

et al. 2018

ChemCatChem

View full text Add to dashboard Cite

The interaction between precious metal nanoparticles and the support plays an important role in improving poisoning tolerance of Pt-based catalysts and thus maintaining their activity and stability. Here, a dendrite-like Mn 3 O 4 was fabricated and used as a support for Pt nanoparticles towards the methanol electrooxidation reaction. The nanoparticles were deposited chemically on surfaces of the dendritic Mn 3 O 4 , which was prepared through calcination of MnO 2 hollow micro-spheres. The Mn 3 O 4 support not only provided an appropriate base for the formation of nanosized and homogeneous platinum particles (about 2.6 nm in size), but also increased Pt 0 binding energy owing to a strong electronic interaction. By combining the advantages of the small-size, fine dispersion and enhanced binding energy of Pt nanoparticles, the Pt/Mn 3 O 4 composite exhibited enhanced catalytic activity, poisoning tolerance and stability for methanol electrooxidation.[a] Dr.

show abstract

“…We estimate the detection limit of hydrogen peroxide to be ca. 0.5 μM which is one of the lowest ever reported at modified electrodes [17,25]. …”

Section: Chemicalsmentioning

confidence: 99%

“…Manganese oxide has been reported to catalyze the oxidation of many species with hydrogen peroxide being one of the most frequently reported [10,17]. Therefore, we attempted to test the action of the deposited film as the electrocatalyst of hydrogen peroxide oxidation.…”

Section: Electrocatalytic Properties Of Mnox-lignosulfonate Filmmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of Manganese Lignosulfonate and Its Application as the Precursor of Nanostructured MnOx for Oxidative Electrocatalysis

et al. 2017

View full text Add to dashboard Cite

Abstract:The synthesis of manganese lignosulfonates by a two-step method has been reported. It was based on the conversion of technical sodium derivative of lignosulfonate to its hydrogen form i.e., lignosulfonic acid and its further reaction with manganese hydroxide. The obtained product was electroactive, and could be applied as the precursor of electroactive manganese oxide. The product showed a reversible redox activity in the potential range of 0 to 1 V vs. an Ag/AgCl reference electrode. The electroactivity of the obtained product can be tentatively assigned to the redox activity of both the electrodeposited MnO x and the presence of lignosulfonate-derived quinones since the energy dispersive spectroscopy (EDS) confirmed the presence of organic matter in the deposit. It also showed substantial electrocatalytic activity towards the anodic oxidation of hydrogen peroxide. This suggests that manganese lignosulfonates could be a valuable compound for the electrochemical preparation of electroactive layers that are suitable in the development of electrochemical sensors.

show abstract

Facile construction of Mn3O4-MnO2 hetero-nanorods/graphene nanocomposite for highly sensitive electrochemical detection of hydrogen peroxide

Cited by 63 publications

References 45 publications

Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries

Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn₃O₄ for Methanol Electrooxidation

Preparation of Manganese Lignosulfonate and Its Application as the Precursor of Nanostructured MnOx for Oxidative Electrocatalysis

Contact Info

Product

Resources

About

Facile construction of Mn3O4-MnO2 hetero-nanorods/graphene nanocomposite for highly sensitive electrochemical detection of hydrogen peroxide

Cited by 63 publications

References 45 publications

Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries

Joint Charge Storage for High‐Rate Aqueous Zinc–Manganese Dioxide Batteries

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn3O4 for Methanol Electrooxidation

Preparation of Manganese Lignosulfonate and Its Application as the Precursor of Nanostructured MnOx for Oxidative Electrocatalysis

Contact Info

Product

Resources

About

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn₃O₄ for Methanol Electrooxidation