Correlation between redox species adsorption and electron transfer kinetics of mildly oxidized graphene: A chronocoulometry and SECM study

Qing Zheng; Huibo Shao

doi:10.1016/j.elecom.2019.05.014

Correlation between redox species adsorption and electron transfer kinetics of mildly oxidized graphene: A chronocoulometry and SECM study

Qing Zheng, Huibo Shao^*

^*Corresponding author for this work

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

11 Citations (Scopus)

Abstract

The influence of redox species adsorption on the heterogeneous electron transfer (HET) rate of graphene, as well as the methodology for the rational design of intermolecular interactions to optimize the performance of graphene as an electrode modifier, are not completely understood. We investigate the influence of redox species adsorption on the HET rate of a mildly oxidized graphene-modified electrode by chronocoulometry (CC) and cyclic voltammetry (CV) combined with scanning electrochemical microscopy (SECM), using outer-sphere redox species FcCH₂OH^1+/0 and inner redox species Fe(CN)₆ ^4−/3–. The results demonstrate that adsorption of outer-sphere redox species on mildly oxidized graphene induces enhancement of HET, which bridges the differences regarding the reactivity of basal and edge plane sites of graphene in the recent literature.

Original language	English
Pages (from-to)	83-87
Number of pages	5
Journal	Electrochemistry Communications
Volume	103
DOIs	https://doi.org/10.1016/j.elecom.2019.05.014
Publication status	Published - Jun 2019
Externally published	Yes

Keywords

Adsorption
Electron transfer
Ferrocenylmethanol
Graphene

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10.1016/j.elecom.2019.05.014

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title = "Correlation between redox species adsorption and electron transfer kinetics of mildly oxidized graphene: A chronocoulometry and SECM study",

abstract = "The influence of redox species adsorption on the heterogeneous electron transfer (HET) rate of graphene, as well as the methodology for the rational design of intermolecular interactions to optimize the performance of graphene as an electrode modifier, are not completely understood. We investigate the influence of redox species adsorption on the HET rate of a mildly oxidized graphene-modified electrode by chronocoulometry (CC) and cyclic voltammetry (CV) combined with scanning electrochemical microscopy (SECM), using outer-sphere redox species FcCH2OH1+/0 and inner redox species Fe(CN)6 4−/3–. The results demonstrate that adsorption of outer-sphere redox species on mildly oxidized graphene induces enhancement of HET, which bridges the differences regarding the reactivity of basal and edge plane sites of graphene in the recent literature.",

keywords = "Adsorption, Electron transfer, Ferrocenylmethanol, Graphene",

author = "Qing Zheng and Huibo Shao",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2019",

month = jun,

doi = "10.1016/j.elecom.2019.05.014",

language = "English",

volume = "103",

pages = "83--87",

journal = "Electrochemistry Communications",

issn = "1388-2481",

publisher = "Elsevier Inc.",

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TY - JOUR

T1 - Correlation between redox species adsorption and electron transfer kinetics of mildly oxidized graphene

T2 - A chronocoulometry and SECM study

AU - Zheng, Qing

AU - Shao, Huibo

PY - 2019/6

Y1 - 2019/6

N2 - The influence of redox species adsorption on the heterogeneous electron transfer (HET) rate of graphene, as well as the methodology for the rational design of intermolecular interactions to optimize the performance of graphene as an electrode modifier, are not completely understood. We investigate the influence of redox species adsorption on the HET rate of a mildly oxidized graphene-modified electrode by chronocoulometry (CC) and cyclic voltammetry (CV) combined with scanning electrochemical microscopy (SECM), using outer-sphere redox species FcCH2OH1+/0 and inner redox species Fe(CN)6 4−/3–. The results demonstrate that adsorption of outer-sphere redox species on mildly oxidized graphene induces enhancement of HET, which bridges the differences regarding the reactivity of basal and edge plane sites of graphene in the recent literature.

AB - The influence of redox species adsorption on the heterogeneous electron transfer (HET) rate of graphene, as well as the methodology for the rational design of intermolecular interactions to optimize the performance of graphene as an electrode modifier, are not completely understood. We investigate the influence of redox species adsorption on the HET rate of a mildly oxidized graphene-modified electrode by chronocoulometry (CC) and cyclic voltammetry (CV) combined with scanning electrochemical microscopy (SECM), using outer-sphere redox species FcCH2OH1+/0 and inner redox species Fe(CN)6 4−/3–. The results demonstrate that adsorption of outer-sphere redox species on mildly oxidized graphene induces enhancement of HET, which bridges the differences regarding the reactivity of basal and edge plane sites of graphene in the recent literature.

KW - Adsorption

KW - Electron transfer

KW - Ferrocenylmethanol

KW - Graphene

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U2 - 10.1016/j.elecom.2019.05.014

DO - 10.1016/j.elecom.2019.05.014

M3 - Article

AN - SCOPUS:85065958227

SN - 1388-2481

VL - 103

SP - 83

EP - 87

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -

Correlation between redox species adsorption and electron transfer kinetics of mildly oxidized graphene: A chronocoulometry and SECM study

Abstract

Keywords

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