Reduced Graphene Oxide: Is it a promising catalyst for the electrochemistry of [UO2(CO3)3]4−/[UO2(CO3)3]5−?

Guin, Saurav K.; Ambolikar, Arvind S.; Kamat, J. V.

doi:10.1016/j.electacta.2015.06.055

Cited by 13 publications

(13 citation statements)

References 61 publications

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“…These broad peaks represent the contribution of several irreversible electrochemical processes. These facts are typical of GO materials containing different OFGs, primarily the epoxyl and carbonyl groups [ 40 , 56 , 57 , 58 , 59 , 60 , 61 ], and can generally be related to the existence of several consecutive electrochemical processes [ 50 , 61 ]. In Figure 1 it can be seen that the cathodic peak potential of the electrochemical feature observed in the non-aqueous medium (−2.43 V) was much more negative than the cathodic peak potential recorded in the aqueous medium (−1.11 V).…”

Section: Resultsmentioning

confidence: 99%

Effect of Electrolytic Medium on the Electrochemical Reduction of Graphene Oxide on Si(111) as Probed by XPS

et al. 2021

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The wafer-scale integration of graphene is of great importance in view of its numerous applications proposed or underway. A good graphene–silicon interface requires the fine control of several parameters and may turn into a high-cost material, suitable for the most advanced applications. Procedures that can be of great use for a wide range of applications are already available, but others are to be found, in order to modulate the offer of different types of materials, at different levels of sophistication and use. We have been exploring different electrochemical approaches over the last 5 years, starting from graphene oxide and resulting in graphene deposited on silicon-oriented surfaces, with the aim of understanding the reactions leading to the re-establishment of the graphene network. Here, we report how a proper choice of both the chemical environment and electrochemical conditions can lead to a more controlled and tunable graphene–Si(111) interface. This can also lead to a deeper understanding of the electrochemical reactions involved in the evolution of graphene oxide to graphene under electrochemical reduction. Results from XPS, the most suitable tool to follow the presence and fate of functional groups at the graphene surface, are reported, together with electrochemical and Raman findings.

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Section: Resultsmentioning

confidence: 99%

Effect of Electrolytic Medium on the Electrochemical Reduction of Graphene Oxide on Si(111) as Probed by XPS

et al. 2021

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“…3 shows the effect of the scan rates on the cyclic voltammograms of 10 mM Pu(IV) in 1 M H 2 SO 4 solution on rGO/GC electrode. 31 The value of L for the redox reaction of Pu(IV)/Pu(III) couple on rGO/GC electrode lies between 2.8 Â 10 À1 (for y ¼ 0.010 V s À1 ) and 5.6 Â 10 À2 (for y ¼ 0.250 V s À1 ) representing the quasi-reversible electrochemistry of Pu(IV)/ Pu(III) on rGO/GC electrode. The inset of Fig.…”

Section: Resultsmentioning

confidence: 99%

“…239 Pu is an a-active nuclide with a half-life of 2.4 Â 10 4 years. 31 A stock solution of 7.618 mg g À1 (or 31.87 mM) of standard plutonium was prepared from the solid working reference, potassium plutonium sulphate dihydrate (K 4 Pu(SO 4 ) 4 $2H 2 O); which was prepared in our laboratory by a method as described elsewhere. This radioactive material must be handled carefully in a radiological facility with appropriate equipment to avoid any health risk caused by the radiation exposure.…”

Section: Methodsmentioning

confidence: 99%

“…rGO/GC) in the electrochemistry of 31 There it was evidenced that in situ generated topological defects introduce signicant in-plane distortions and strains in the surrounding lattice of rGO resulting into its higher reactivity towards the electrochemistry of U. 30 Therefore; it was of interest to develop easier and rapid voltammetric methodology for the determination of uranium and plutonium in the nuclear fuels.…”

Section: Introductionmentioning

confidence: 99%

“…Authors have recently explored the electrocatalytic action of electrochemically reduced graphene oxide (rGO) modied glassy carbon electrode (i.e. rGO/GC) in the electrochemistry of 31 There it was evidenced that in situ generated topological defects introduce signicant in-plane distortions and strains in the surrounding lattice of rGO resulting into its higher reactivity towards the electrochemistry of U. However, the aqueous electrochemistry of plutonium on graphene material is yet unexplored.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemistry of actinides on reduced graphene oxide: craving for the simultaneous voltammetric determination of uranium and plutonium in nuclear fuel

2015

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Chemically clean synthesis and characterization of graphene oxide‐poly(acrylic acid–sodium styrene sulfonate) composite thermostable elastic gel encapsulating copper nanoparticles for efficient catalytic reduction of 4‐nitrophenol

Guin

Bhardwaj

Varshney

2018

J of Applied Polymer Sci

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The thermostable chemically blended elastic poly‐(acrylic acid–sodium‐styrene‐sulfonate–graphene oxide) super‐absorbent hydrogel was synthesized by additive‐free gamma‐radiation induced polymerization followed by crosslinking method. It showed the best swelling ratio in water due to its porous nature. The composite material adsorbed 98 mg/g Cu(II) at room temperature from the aqueous solution of Cu(II) at pH 5 by the chemi‐adsorption of Cu(II) ions at several energetically heterogeneous functional groups. The copper nanoparticles (CuNPs) of size 12 ± 8 nm had been synthesized in situ by chemical reduction of the pre‐adsorbed Cu(II) ions. The functional groups of composite hydrogel served as complexing agent and nano‐reaction sites. Avoiding any pre‐reduction induction time, the inexpensive CuNPs catalytically completely decolorized the aqueous solution of 4‐nitrophenol (4‐NP) within 60 s in the presence of NaBH4 at a promising calculated rate constant (9.0 × 10−2/s) ever reported in the literatures. It is in contrast to the commonly noticeable phenomenon for other CuNPs‐based catalysis of 4‐NP. The composite hydrogel matrix helped to retain the catalytic activity of CuNPs and simultaneously it helped in the osmotic inclusion of 4‐NP into the reaction cites. This composite hydrogel synthesized through a chemically clean method could be utilized for efficient conversion of hazardous chemical 4‐NP to industrially important chemical 4‐aminophenol. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46200.

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Reduced Graphene Oxide: Is it a promising catalyst for the electrochemistry of [UO2(CO3)3]4−/[UO2(CO3)3]5−?

Cited by 13 publications

References 61 publications

Effect of Electrolytic Medium on the Electrochemical Reduction of Graphene Oxide on Si(111) as Probed by XPS

Effect of Electrolytic Medium on the Electrochemical Reduction of Graphene Oxide on Si(111) as Probed by XPS

Electrochemistry of actinides on reduced graphene oxide: craving for the simultaneous voltammetric determination of uranium and plutonium in nuclear fuel

Chemically clean synthesis and characterization of graphene oxide‐poly(acrylic acid–sodium styrene sulfonate) composite thermostable elastic gel encapsulating copper nanoparticles for efficient catalytic reduction of 4‐nitrophenol

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