Oxygen-Ions-Mediated Pseudocapacitive Charge Storage in Molybdenum Trioxide Nanobelts

Vipin Kumar; Xu Wang; Pooi See Lee

doi:10.1002/cnma.201500045

Oxygen-Ions-Mediated Pseudocapacitive Charge Storage in Molybdenum Trioxide Nanobelts

Vipin Kumar, Xu Wang, Pooi See Lee^*

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Here we demonstrate the effect of the concentration of hydrogen peroxide solution on the generation of various kinds of oxygen ions, mainly peroxide (O₂ ²⁻) and superoxide (O₂ ⁻) ions, on the surface of molybdenum trioxide (MoO₃) nanobelts. Due to O₂ ²⁻ and O₂ ⁻ ions, the mechanism of charge storage shows an interplay between surface-controlled and diffusion-controlled redox reactions. The concentration of H₂O₂ is indicative of the strength of hydrogen bonding, which significantly affects the concentration or coordination of the surface species (O₂ ⁻, O₂ ²⁻, Mo⁵⁺ and Mo⁶⁺) that are available to interact with the electrolyte ions. By altering the concentration of the surface species (I_O2 ⁻/I_O2 ²⁻, I_Mo ⁵⁺/I_Mo ⁶⁺), a specific capacitance as high as 210 F g⁻¹ is achieved for MoO₃ nanobelts at an applied current density of 0.5 A g⁻¹, with relatively good cycling stability (≈85 %) after 2000 cycles.

Original language	English
Pages (from-to)	403-408
Number of pages	6
Journal	ChemNanoMat
Volume	1
Issue number	6
DOIs	https://doi.org/10.1002/cnma.201500045
Publication status	Published - Oct 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

ASJC Scopus Subject Areas

Biomaterials
Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Materials Chemistry

Keywords

molybdenum trioxide nanobelts
peroxide ions
redox reactions
supercapacitors
superoxide ions

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/cnma.201500045

Cite this

@article{c15afd94c23e4747ab82af2e51159b14,

title = "Oxygen-Ions-Mediated Pseudocapacitive Charge Storage in Molybdenum Trioxide Nanobelts",

abstract = "Here we demonstrate the effect of the concentration of hydrogen peroxide solution on the generation of various kinds of oxygen ions, mainly peroxide (O2 2−) and superoxide (O2 −) ions, on the surface of molybdenum trioxide (MoO3) nanobelts. Due to O2 2− and O2 − ions, the mechanism of charge storage shows an interplay between surface-controlled and diffusion-controlled redox reactions. The concentration of H2O2 is indicative of the strength of hydrogen bonding, which significantly affects the concentration or coordination of the surface species (O2 −, O2 2−, Mo5+ and Mo6+) that are available to interact with the electrolyte ions. By altering the concentration of the surface species (IO2 −/IO2 2−, IMo 5+/IMo 6+), a specific capacitance as high as 210 F g−1 is achieved for MoO3 nanobelts at an applied current density of 0.5 A g−1, with relatively good cycling stability (≈85 %) after 2000 cycles.",

keywords = "molybdenum trioxide nanobelts, peroxide ions, redox reactions, supercapacitors, superoxide ions",

author = "Vipin Kumar and Xu Wang and Lee, {Pooi See}",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2015",

month = oct,

doi = "10.1002/cnma.201500045",

language = "English",

volume = "1",

pages = "403--408",

journal = "ChemNanoMat",

issn = "2199-692X",

publisher = "Wiley-VCH Verlag",

number = "6",

}

TY - JOUR

T1 - Oxygen-Ions-Mediated Pseudocapacitive Charge Storage in Molybdenum Trioxide Nanobelts

AU - Kumar, Vipin

AU - Wang, Xu

AU - Lee, Pooi See

PY - 2015/10

Y1 - 2015/10

N2 - Here we demonstrate the effect of the concentration of hydrogen peroxide solution on the generation of various kinds of oxygen ions, mainly peroxide (O2 2−) and superoxide (O2 −) ions, on the surface of molybdenum trioxide (MoO3) nanobelts. Due to O2 2− and O2 − ions, the mechanism of charge storage shows an interplay between surface-controlled and diffusion-controlled redox reactions. The concentration of H2O2 is indicative of the strength of hydrogen bonding, which significantly affects the concentration or coordination of the surface species (O2 −, O2 2−, Mo5+ and Mo6+) that are available to interact with the electrolyte ions. By altering the concentration of the surface species (IO2 −/IO2 2−, IMo 5+/IMo 6+), a specific capacitance as high as 210 F g−1 is achieved for MoO3 nanobelts at an applied current density of 0.5 A g−1, with relatively good cycling stability (≈85 %) after 2000 cycles.

AB - Here we demonstrate the effect of the concentration of hydrogen peroxide solution on the generation of various kinds of oxygen ions, mainly peroxide (O2 2−) and superoxide (O2 −) ions, on the surface of molybdenum trioxide (MoO3) nanobelts. Due to O2 2− and O2 − ions, the mechanism of charge storage shows an interplay between surface-controlled and diffusion-controlled redox reactions. The concentration of H2O2 is indicative of the strength of hydrogen bonding, which significantly affects the concentration or coordination of the surface species (O2 −, O2 2−, Mo5+ and Mo6+) that are available to interact with the electrolyte ions. By altering the concentration of the surface species (IO2 −/IO2 2−, IMo 5+/IMo 6+), a specific capacitance as high as 210 F g−1 is achieved for MoO3 nanobelts at an applied current density of 0.5 A g−1, with relatively good cycling stability (≈85 %) after 2000 cycles.

KW - molybdenum trioxide nanobelts

KW - peroxide ions

KW - redox reactions

KW - supercapacitors

KW - superoxide ions

UR - http://www.scopus.com/inward/record.url?scp=85019461633&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019461633&partnerID=8YFLogxK

U2 - 10.1002/cnma.201500045

DO - 10.1002/cnma.201500045

M3 - Article

AN - SCOPUS:85019461633

SN - 2199-692X

VL - 1

SP - 403

EP - 408

JO - ChemNanoMat

JF - ChemNanoMat

IS - 6

ER -

Oxygen-Ions-Mediated Pseudocapacitive Charge Storage in Molybdenum Trioxide Nanobelts

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this