Journal ArticleDOI
The Study of Semiconduction Properties of γ ‐ MnO2 with Different Degrees of Reduction
Xi Xia,Hong Li,Zhen‐Hai Chen +2 more
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TLDR
In this article, a correlation between semiconductor properties and electrochemical properties was developed for different degrees of reduction resulting from homogeneous phase stepwise reduction of by the hydrazine method.Abstract:
In the past, investigation of the semiconductor properties concentrated mainly on the conductivity of unreduced manganese dioxide. Now semiconductor properties have been investigated on samples of different degrees of reduction resulting from homogeneous phase stepwise reduction of by the hydrazine method. In the range of ; from 2 to 1.6, all samples exhibited n‐type semiconductor properties. Other properties investigated were dc conductivity, Seebeck coefficient, and electron mobility. A correlation between semiconductor properties and electrochemical properties was developed.read more
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Structural and electrochemical properties of the proton / γ-MnO2 system
Y. Chabre,J. Pannetier +1 more
TL;DR: In this paper, a structural description of the electrochemically active forms of manganese dioxide, known as γ- and e-MnO 2 and used in Leclanche and alkaline batteries, in relation to an investigation of their electrochemical properties is presented.
Journal ArticleDOI
Nickel Confined in the Interlayer Region of Birnessite: an Active Electrocatalyst for Water Oxidation
Akila C. Thenuwara,Elizabeth B. Cerkez,Samantha L. Shumlas,Nuwan H. Attanayake,Ian G. McKendry,Laszlo Frazer,Laszlo Frazer,Eric Borguet,Qing Kang,Richard C. Remsing,Michael L. Klein,Michael J. Zdilla,Daniel R. Strongin +12 more
TL;DR: Molecular dynamics simulations suggest that a competition among the interactions between the nickel cation, water, and birnessite promote redox chemistry in the spatially confined interlayer region.
Journal ArticleDOI
Activity of perovskite La1−xSrxMnO3 catalysts towards oxygen reduction in alkaline electrolytes
John Tulloch,Scott W. Donne +1 more
TL;DR: The behavior of perovskite-based series of compounds La 1− x Sr x MnO 3 (where x ǫ = 0, 0.2, 0., 0.4, 0.8 and 1.0) towards oxygen reduction in an ambient temperature alkaline 1-M KOH electrolyte is presented in this paper.
Journal ArticleDOI
Enhanced manganese dioxide supercapacitor electrodes produced by electrodeposition
TL;DR: In this article, a thin film of manganese dioxide, prepared using chronoamperometry on a platinum substrate in an electrolyte of MnSO 4 in H 2 SO 4, has been shown to possess a significantly higher capacitance compared to the literature materials.
Journal ArticleDOI
MnO2-Based Thermopower Wave Sources with Exceptionally Large Output Voltages
Sumeet Walia,Sivacarendran Balendhran,Pyshar Yi,David D. Yao,Serge Zhuiykov,Muthu Pannirselvam,Rodney Weber,Michael S. Strano,Madhu Bhaskaran,Sharath Sriram,Kourosh Kalantar-zadeh +10 more
TL;DR: In this article, a thermoelectric MnO2 layer is used as a pathway for the propagation of thermopower waves that are generated as a result of an exothermic chemical reaction of a solid fuel (nitrocellulose).