Controlling inter-sheet-distance in reduced graphene oxide electrodes for highly sensitive electrochemical impedimetric sensing of myoglobin

Yoo, Seong Soo; Kim, So Young; Kim, Kwang Su; Hong, Sunghwan; Oh, Min Jun; Nam, Myeong Gyun; Kim, Woo Jae; Park, Juhyun; Chung, Chan‐Hwa; Choe, Woo Seok; Yoo, Pil J.

doi:10.1016/j.snb.2019.127477

Cited by 24 publications

(5 citation statements)

References 37 publications

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“…One semicircle was observed in the Nyquist plots for the three electrode surface, indicates to the interfacial electron transfer resistance ( R ct ), which characterizes the kinetics of the HER process 53 . The obtained impedance spectra are fitted by the classical Randles equivalent circuit model based on the only one constant phase element (CPE) as presented in Figure 9, 11,54 where R e stands for the electrolyte resistance. From the results, the R ct value of bio‐rGO/Pd is calculated to be 19 Ω, which is much smaller than that of bio‐rGO (650 Ω) and bio‐rPd (40 Ω).…”

Section: Resultsmentioning

confidence: 99%

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Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Kayan

Turunç

2021

Int J Energy Res

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Summary In this work, we introduced a green methodology for the production of palladium (Pd) decorated reduced graphene oxide (rGO), using an endemic plant of Onosma malatyana Binzet (OMB) root extract for the first time and used it as an electrocatalyst for hydrogen evolution reaction (HER) in aqueous acidic media. Benefiting from the synergetic effect between rGO and Pd nanoparticles, the as‐prepared bio‐reduced GO/Pd (bio‐rGO/Pd) nanocomposite exhibits a remarkable performance towards HER when the results compared with the bio‐rGO and bio‐rPd nanocomposite. The HER overpotential at a current density of 10 mA cm−2 for bio‐rGO/Pd was only 0.17 V. The Tafel slope of the bio‐rGO/Pd nanocomposite film obtained from the HER polarization curves exhibits 154 mV dec−1, showing that the process is limited by the Volmer reaction step. In addition, the bio‐rGO/Pd nanocomposite electrode also showed an outstanding stability after a long‐term potential cycling measurement. It possesses a high synergetic effect, low charge transfer resistance and considerable electrochemical surface area. The all obtained results demonstrated that the bio‐rGO/Pd will be a promising green synthesized HER catalyst.

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Section: Resultsmentioning

confidence: 99%

“…Graphene oxide; a graphene derivative, has attracted great concern in recent years because it is used in energy storage, 10 as a biosensor, 11 for disease detection, 12 etc. Reduced graphene oxide is the most popular graphene derivative with properties close to the pristine graphene 13 .…”

Section: Introductionmentioning

confidence: 99%

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Kayan

Turunç

2021

Int J Energy Res

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“…The thermal treatment is the simplest way to reduce GO [ 26 – 28 ]. Many of the thermal reduction steps to form rGO are performed hydrothermally in an autoclave to reduce the precursor material under high temperature and pressure [ 22 , 29 , 30 ].…”

Section: Chemical Exfoliationmentioning

confidence: 99%

Recent developments in carbon-based two-dimensional materials: synthesis and modification aspects for electrochemical sensors

Kirchner

Hirsch

2020

Microchim Acta

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This review (162 references) focuses on two-dimensional carbon materials, which include graphene as well as its allotropes varying in size, number of layers, and defects, for their application in electrochemical sensors. Many preparation methods are known to yield two-dimensional carbon materials which are often simply addressed as graphene, but which show huge variations in their physical and chemical properties and therefore on their sensing performance. The first section briefly reviews the most promising as well as the latest achievements in graphene synthesis based on growth and delamination techniques, such as chemical vapor deposition, liquid phase exfoliation via sonication or mechanical forces, as well as oxidative procedures ranging from chemical to electrochemical exfoliation. Two-dimensional carbon materials are highly attractive to be integrated in a wide field of sensing applications. Here, graphene is examined as recognition layer in electrochemical sensors like field-effect transistors, chemiresistors, impedance-based devices as well as voltammetric and amperometric sensors. The sensor performance is evaluated from the material’s perspective of view and revealed the impact of structure and defects of the 2D carbon materials in different transducing technologies. It is concluded that the performance of 2D carbon-based sensors is strongly related to the preparation method in combination with the electrical transduction technique. Future perspectives address challenges to transfer 2D carbon-based sensors from the lab to the market.

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“…Yoo et al [156] developed an impedimetric biosensor for myoglobin (Mb) and controlled the interlayer spacing of the rGO sheets to improve the electrochemical behavior of the sensor. The schematic diagram of the electrode and the main results of this study are presented in Figure 12.…”

Section: Environmental Monitoring Applicationsmentioning

confidence: 99%

Structure, Properties, and Electrochemical Sensing Applications of Graphene‐Based Materials

et al. 2020

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Owing to their versatility and unique characteristics, graphene‐based materials have been used extensively for the development of electrochemical sensors and biosensors. The key to the maximum potential of these materials is the understanding of the role their structure plays in their modification processes. Herein, we summarize some structural characteristics of graphene oxide (GO) and reduced graphene oxide (rGO) and explore different surface modification methods for electrochemical sensing applications. surveyed the most recent applications of these materials as (bio)sensors, particularly for environmental monitoring and health‐related applications, such as quantification of biomarkers and metabolites and detection of cancer cells. The low detection limits, selectivity toward target molecules, and robustness of GO‐ and rGO‐based electrodes render them critical materials for the preparation of sensors for routine analysis and monitoring.

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Controlling inter-sheet-distance in reduced graphene oxide electrodes for highly sensitive electrochemical impedimetric sensing of myoglobin

Cited by 24 publications

References 37 publications

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Bio‐reduced GO /Pd nanocomposite as an efficient and green synthesized catalyst for hydrogen evolution reaction

Recent developments in carbon-based two-dimensional materials: synthesis and modification aspects for electrochemical sensors

Structure, Properties, and Electrochemical Sensing Applications of Graphene‐Based Materials

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