Silver nanoparticles anchored reduced graphene oxide for enhanced electrocatalytic activity towards methanol oxidation

Kumar, Sandeep; Mahajan, Mani; Singh, Rajinder; Mahajan, Aman

doi:10.1016/j.cplett.2018.01.003

Cited by 37 publications

(21 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4c) which is likely due to the presence of Pt-Ag nanoparticles on the graphene surface. 5,32 Thus, these results conrm that the oxygen functional groups were reduced in Pt-Ag/Gr.…”

Section: Characterization Of Pt-ag/grmentioning

confidence: 64%

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

et al. 2020

View full text Add to dashboard Cite

show abstract

“…4c) which is likely due to the presence of Pt-Ag nanoparticles on the graphene surface. 5,32 Thus, these results conrm that the oxygen functional groups were reduced in Pt-Ag/Gr.…”

Section: Characterization Of Pt-ag/grmentioning

confidence: 64%

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The increased methanol concentration accelerated the diffusion of methanol at the interface of catalysts and promotes the MOR process [55]. Thus, the above mentioned results demonstrate that the nanohybrid catalyst showed better performance for MOR [13] as compared to those reported in the literature (see Table 2). The J f /J b ratio for CNT-CR@Au is ~1.68, higher than the values reported from the literature and gathered in Table 2, at the exception of Pt-Au/CNT@TiO 2 (entry 8).…”

Section: Cnt-cr@aunps/gcmentioning

confidence: 49%

“…These results account for the electrocatalytic performances of the CNT-CR@Au nanocatalyst [52,53]. associated with the catalytic activity of prepared electrocatalyst for MOR, the variation of electrode potential with the logarithm current density was investigated [13] (Fig. 8).…”

Section: Cnt-cr@aunps/gcmentioning

confidence: 79%

“Painted” CNT@Au Nanoparticles: A Nanohybrid Electrocatalyst of Direct Methanol Oxidation

Bensghaïer¹,

Bhullar²,

Kaur³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

In a world of constant rush towards novel energy sources, hybrid nanomaterials have raised huge interest as their components can synergistically improve the expected performances in terms of power. In this regard, direct methanol oxidation (DMO) is among the most investigated reactions for implementation in portable and other devices. Herein, we report the design of gold-decorated CNT-aryl nanohybrids as electrocatalyst of DMO. In a first step, Azure A (AA), Neutral Red (NR) and Congo Red (CR) dye diazonium salts were reacted with CNTs to provide CNT-Dye nanoscale platforms for the immobilization of gold NPs. This step was conducted with CNT-Dye platforms evenly spread over glassy carbon (GC) electrodes. The CNT-Dye@Au nanohybrid electrode materials served for DMO electrocatalysis. Cyclic voltammograms show that bare CNT-Dye nanohybrids exhibit high electrocatalytic activity, particularly for the CNT-CR nanohybrid which returned a 3-fold improvement. With anchored Au NPs, a further 4 time remarkable increase in the oxidation peak intensity was achieved (i.e. about 12-fold the peak intensity recorded in the absence of any nanocatalyst). The forward to the backward anodic peak current density ratio Jf/Jb was found to be as high as is 1.68. This work provides a simple, elegant and efficient approach for designing robust, nanohybrid electrocatalyst for DMO, based on the smart combination of CNTs, diazotized dyes and gold NPs.

show abstract

“…The redox process associated to both the Co III jCo II and Mn III jMn II couples presented a rate constant of k 0 = 0.63 s À 1 and α = 0.08. [53,54] Thus, both the increase in anodic current and the shape of the cyclic voltammograms confirm the capability of this material to electrocatalyze the oxidation of H 2 O 2 . Both rate constants for electron transfer are in excellent agreement with other Prussian bluebased electrodes reported in the literature.…”

Section: Electrochemistry Of the Comnhcf Solid And H 2 O 2 Electrooximentioning

confidence: 60%

“…Such feature has been observed before in cyclic voltammetry for the electrocatalytic oxidation of several species, including not only H 2 O 2 , [51,52] but also methanol. [53,54] Thus, both the increase in anodic current and the shape of the cyclic voltammograms confirm the capability of this material to electrocatalyze the oxidation of H 2 O 2 .…”

Section: Electrochemistry Of the Comnhcf Solid And H 2 O 2 Electrooximentioning

confidence: 60%

Bimetallic Co²⁺ and Mn²⁺ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor

et al. 2019

View full text Add to dashboard Cite

In this work, we report the synthesis and characterization of a bimetallic Prussian blue analogue containing Co and Mn as outer-sphere metals (CoMnHCF). The material was a solid solution and its characterization revealed a chemical composition of Co 2.05 Mn 0.95 [Fe(CN) 6 ] 2 · 12H 2 O. The electrochemistry of this novel material showed the existence of two redox waves displaying quasi-reversible kinetics, as expressed by the larger peak-to-peak separation upon increasing the potential sweep rate. Interestingly, the CoMnHCF solid exhibited high electrocatalytic activity for the oxidation of hydrogen peroxide, thus representing an appealing scaffold for the construction of biosensors. As a proof of concept, cholesterol oxidase was immobilized at the electrode surface by using a sol-gel method, and the cyclic voltammograms were recorded at increasing concentrations of cholesterol. The biosensor showed a detection limit of 30 μM and two linear ranges with excellent sensitivity of 385 mA cm À 2 M À 1 between 50 and 150 μM, and an adequate sensitivity of 80 mA cm À 2 M À 1 between 150 and 1 mM. To the best of our knowledge, this is the first biosensor application of a pre-synthesized bimetallic hexacyanometallate, thus exploiting its potential as an H 2 O 2 electrooxidation catalyst.

show abstract

Silver nanoparticles anchored reduced graphene oxide for enhanced electrocatalytic activity towards methanol oxidation

Cited by 37 publications

References 35 publications

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

“Painted” CNT@Au Nanoparticles: A Nanohybrid Electrocatalyst of Direct Methanol Oxidation

Bimetallic Co²⁺ and Mn²⁺ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor

Contact Info

Product

Resources

About

Silver nanoparticles anchored reduced graphene oxide for enhanced electrocatalytic activity towards methanol oxidation

Cited by 37 publications

References 35 publications

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

A dopamine electrochemical sensor based on a platinum–silver graphene nanocomposite modified electrode

“Painted” CNT@Au Nanoparticles: A Nanohybrid Electrocatalyst of Direct Methanol Oxidation

Bimetallic Co2+ and Mn2+ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor

Contact Info

Product

Resources

About

Bimetallic Co²⁺ and Mn²⁺ Hexacyanoferrate for Hydrogen Peroxide Electrooxidation and Its Application in a Highly Sensitive Cholesterol Biosensor