期刊
JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING
卷 12, 期 5, 页码 1001-1008出版社
INT ASSOC PHYSICAL CHEMISTS-IAPC
关键词
Redox reaction; density functional theory; frontier molecular orbitals (FMO); Fukui analysis
资金
- Himachal Pradesh Council for Science, Technology and Environment (HIMCOSTE) [STC/F(8)-2(RD 20-21)-461, SERB-TARE TAR/2021/000197]
Glycine acts as an electron transfer mediator at the graphene interface, with amine groups and carboxylic acid groups serving as additional oxidation and reduction sites at the interface.
In the last few years, glycine (GL) showed good experimental evidence as an electron transfer (ET) mediator at the carbon (in particular graphene (GR)) interface. However, ET properties of GL modified GR interface are still not known completely. These can be achieved using density functional theory-based models. Modelling of modified carbon electrode interfaces is essential in electroanalytical chemistry to get insights into their electronic and redox properties. Here we have modelled glycine modified graphene interface to find out its interfacial redox ET properties. Conceptual density functional theory concepts like frontier molecular orbital (FMO) theory and analytical Fukui functions were utilized to predict the ET sites on the modified graphene surface. It is shown that at the glycine-modified graphene interface, amine groups act as additional oxidation sites and carboxylic acid groups as additional reduction sites. Therefore, glycine acts as an ET mediator at the graphene-based electrode interface. The obtained results are well supported by previously published experimental reports.
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