Abstract
Well-defined, stoichiometric derivatives of graphene afford many opportunities in fine-tuning of graphene properties and hence, extend the application potential of this material. Here, we present the electrochemical properties of cyanographene (G−CN), and graphene acid (G−COOH) in order to understand the role of the covalently attached functional groups on the graphene sheet in electrochemical sensing for the detection of biomarkers. G−CN shows better performance for the negatively charged analytes ascorbic and uric acids when compared to G−COOH. The less-favourable performance of G−COOH is explained by repulsion between negatively charged analytes and negatively charged functional groups of G−COOH. The capacitance of both materials is in a comparable range, but chronopotentiometry reveals that G−CN shows a greater capacitance than G−COOH. The identified differences in electrochemical properties imprinted by the functional group show that its chemical nature can be exploited in fine-tuning of the selectivity of electrochemical sensing and energy storage applications.
| Original language | English |
|---|---|
| Pages (from-to) | 229-234 |
| Number of pages | 6 |
| Journal | ChemElectroChem |
| Volume | 6 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2019 Jan 2 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Electrochemistry
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Cyanographene and Graphene Acid : The Functional Group of Graphene Derivative Determines the Application in Electrochemical Sensing and Capacitors. / Heng Cheong, Yi; Nasir, Muhammad Zafir Mohamad; Bakandritsos, Aristides; Pykal, Martin; Jakubec, Petr; Zbořil, Radek; Otyepka, Michal; Pumera, Martin.
In: ChemElectroChem, Vol. 6, No. 1, 02.01.2019, p. 229-234.Research output: Contribution to journal › Article
TY - JOUR
T1 - Cyanographene and Graphene Acid
T2 - The Functional Group of Graphene Derivative Determines the Application in Electrochemical Sensing and Capacitors
AU - Heng Cheong, Yi
AU - Nasir, Muhammad Zafir Mohamad
AU - Bakandritsos, Aristides
AU - Pykal, Martin
AU - Jakubec, Petr
AU - Zbořil, Radek
AU - Otyepka, Michal
AU - Pumera, Martin
PY - 2019/1/2
Y1 - 2019/1/2
N2 - Well-defined, stoichiometric derivatives of graphene afford many opportunities in fine-tuning of graphene properties and hence, extend the application potential of this material. Here, we present the electrochemical properties of cyanographene (G−CN), and graphene acid (G−COOH) in order to understand the role of the covalently attached functional groups on the graphene sheet in electrochemical sensing for the detection of biomarkers. G−CN shows better performance for the negatively charged analytes ascorbic and uric acids when compared to G−COOH. The less-favourable performance of G−COOH is explained by repulsion between negatively charged analytes and negatively charged functional groups of G−COOH. The capacitance of both materials is in a comparable range, but chronopotentiometry reveals that G−CN shows a greater capacitance than G−COOH. The identified differences in electrochemical properties imprinted by the functional group show that its chemical nature can be exploited in fine-tuning of the selectivity of electrochemical sensing and energy storage applications.
AB - Well-defined, stoichiometric derivatives of graphene afford many opportunities in fine-tuning of graphene properties and hence, extend the application potential of this material. Here, we present the electrochemical properties of cyanographene (G−CN), and graphene acid (G−COOH) in order to understand the role of the covalently attached functional groups on the graphene sheet in electrochemical sensing for the detection of biomarkers. G−CN shows better performance for the negatively charged analytes ascorbic and uric acids when compared to G−COOH. The less-favourable performance of G−COOH is explained by repulsion between negatively charged analytes and negatively charged functional groups of G−COOH. The capacitance of both materials is in a comparable range, but chronopotentiometry reveals that G−CN shows a greater capacitance than G−COOH. The identified differences in electrochemical properties imprinted by the functional group show that its chemical nature can be exploited in fine-tuning of the selectivity of electrochemical sensing and energy storage applications.
UR - http://www.scopus.com/inward/record.url?scp=85050646298&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050646298&partnerID=8YFLogxK
U2 - 10.1002/celc.201800675
DO - 10.1002/celc.201800675
M3 - Article
AN - SCOPUS:85050646298
VL - 6
SP - 229
EP - 234
JO - ChemElectroChem
JF - ChemElectroChem
SN - 2196-0216
IS - 1
ER -