Electrochemical reduction of graphene oxide films in aqueous and organic solutions

Kauppila, Jussi; Kunnas, Peter; Damlin, Pia; Viinikanoja, Antti; Kvarnström, Carita

doi:10.1016/j.electacta.2012.10.153

Cited by 126 publications

(91 citation statements)

References 42 publications

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“…Electrochemical reduction of the oxygen-based functionalities from GO did not affect the morphology of the sensor surface, which presents the same crumpled and wrinkled texture. Little different morphology of RGO (obtained by electrochemical or chemical reduction) from that of its GO counterpart is also reported in the literature [17,[25][26][27][28].…”

Section: Resultsmentioning

confidence: 80%

Electrochemical determination of NADH using screen printed carbon electrodes modified with reduced graphene oxide and poly(allylamine hydrochloride)

2015

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We describe a new type of NADH sensor based on a screen-printed electrode (SPE) modified with reduced graphene oxide (RGO) and poly(allylamine hydrochloride) (PAH). A mixture of graphene oxide (GO) and PAH was deposited on the surface of a carbon working electrode, and RGO was prepared in-situ by electrochemical reduction of GO. The oxidation peak of NADH was recorded at +450 mV (vs. silver pseudo-reference). Under optimized conditions, the electrode exhibits high electrocatalytic activity toward NADH oxidation, expressed by a high rate constant and a stable response up to 0.8 mM concentrations. The sensitivity is 108.6 μA·mM −1 ·cm −2 , the response time is 20 s (for 95 % of the steady state current), and the detection limit is 6.6 μM (at an S/N ratio of 3). A peak separation of about 300 mV was achieved in differential pulse voltammetric determination of NADH in the presence of ascorbic acid. This makes the new sensor a useful tool with potential analytical application in different dehydrogenase based systems.

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Section: Resultsmentioning

confidence: 80%

Electrochemical determination of NADH using screen printed carbon electrodes modified with reduced graphene oxide and poly(allylamine hydrochloride)

2015

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“…Chemically, GO can be reduced by using sodium borohydride, hydrazine, NaOH, sodium carbonate, and L-ascorbic acid, whereas electrochemical reduction can be performed by using CV or chronoamperometry techniques at negative potentials. 30 Nevertheless, the electrical performance of RGO is not similar to the pristine graphene as not all of the oxygenated functional groups will be eliminated during the reduction process as there is still remaining of oxygen functionalities and defects. 30 Nevertheless, the electrical performance of RGO is not similar to the pristine graphene as not all of the oxygenated functional groups will be eliminated during the reduction process as there is still remaining of oxygen functionalities and defects.…”

Section: Reduced Graphene Oxidementioning

confidence: 99%

Graphene-based ternary composites for supercapacitors

2018

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Summary The research on electrode materials for supercapacitor application continues to evolve as the request of high‐energy storage system has increased globally due to the demand for energy consumption. Over the past decades, various types of carbon‐based materials have been employed as electrode materials for high‐performance supercapacitor application. Among them, graphene is 1 of the most widely used carbon‐based materials due to its excellent properties including high surface area and excellent conductivity. To exploit more of its interesting properties, graphene is tailored to produce graphene oxide and reduced graphene oxide to improve the dispersibility in water and easy to be incorporated with other materials to form binary composites or even ternary composites. Nowadays, ternary composites have attracted enormous interest as 2 materials (binary composites) cannot satisfy the requirement of the high‐performance supercapacitor. Thus, many approaches have been employed to fabricate ternary composites by combining 3 different types of electroactive materials for high‐performance supercapacitor application. This review focuses on the supercapacitive performance of graphene‐based ternary composites with different types of active materials, ie, conducting polymers, metal oxide, and other carbon‐based materials.

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“…The newly introduced groups are more resistant to further electrochemical reduction than the original ones, and in the conditions used are not efficiently removed. 31 In conclusion, our results show that the role of water is crucial in order to switch GO from OFF to ON state. The main factor here is the humidity and the size of the meniscus surrounding the LC-AFM tip, which directly influences the spatial resolution of the RS process and, in consequence, the potential density of information storage in the future ReRAM devices.…”

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confidence: 55%

The role of water in resistive switching in graphene oxide

Rogala

Kowalczyk

Dąbrowski

et al. 2015

Applied Physics Letters

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Published by the AIP PublishingArticles you may be interested in Nonvolatile memory behavior of nanocrystalline cellulose/graphene oxide composite films Appl. Phys. Lett. 105, 153111 (2014); 10.1063/1.4898601Forming free resistive switching in graphene oxide thin film for thermally stable nonvolatile memory applicationsThe resistive switching processes are investigated at the nano-scale in graphene oxide. The modification of the material resistivity is driven by the electrical stimulation with the tip of atomic force microscope. The presence of water in the atmosphere surrounding graphene oxide is found to be a necessary condition for the occurrence of the switching effect. In consequence, the switching is related to an electrochemical reduction. Presented results suggest that by changing the humidity level the in-plane resolution of data storage process can be controlled. These findings are essential when discussing the concept of graphene based resistive random access memories. V C 2015 AIP Publishing LLC. [http://dx.

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Electrochemical reduction of graphene oxide films in aqueous and organic solutions

Cited by 126 publications

References 42 publications

Electrochemical determination of NADH using screen printed carbon electrodes modified with reduced graphene oxide and poly(allylamine hydrochloride)

Electrochemical determination of NADH using screen printed carbon electrodes modified with reduced graphene oxide and poly(allylamine hydrochloride)

Graphene-based ternary composites for supercapacitors

The role of water in resistive switching in graphene oxide

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