Fabrication of Pt/porous PANI using attapulgite as template for electro-oxidation of glycerol

Xie, Aijuan; Zhou, Xingmeng; Zhou, Wenting; Cai, Kewen; Li, Weiwei; Yao, Chao

doi:10.1016/j.electacta.2015.12.104

Cited by 22 publications

(12 citation statements)

References 51 publications

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“…The anodic peak current was found to increase with the increase in scan rate from 25 mV/s to 200 mV/s, indicating that the methanol oxidation reaction at the PACHA coated electrode attained good stability with the increase in scan rate [59]. A slight shift in peak potentials is observed with the increase in scan rate, indicating contribution from electrochemical polarization and kinetics constraints of methanol oxidation on PACHA modified gold electrodes [38,60,61]. The electrooxidation of species at the electrode surfaces are either adsorption controlled or diffusion controlled.…”

Section: Electro Oxidation Of Methanol On Pacha Coated Goldmentioning

confidence: 89%

Performance Improvement of Gold Electrode towards Methanol Electrooxidation in Akaline Medium: Enhanced Current Density Achieved with Poly(aniline-co-2-hydroxyaniline) Coating at Low Overpotential

et al. 2022

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Electronically conducting poly (aniline-co-2-hydroxyaniline) (PACHA), a copolymer of aniline and 2-hydroxyaniline (2HA), was electrochemically coated on gold substrate for methanol electrooxidation in alkaline media. The electrochemical behavior of PACHA coated gold electrode towards methanol electrooxidation was investigated via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) for application in an alkaline fuel cell. Methanol electrooxidation was observed at two different electrode potentials depending on the concentration of the base. At the PACHA coated gold electrode, the methanol oxidation peak was observed at lower overpotential (at 0.19 V) in a solution of high base concentration (1.8 M NaOH), which was 30 mV lower than the peak for the uncoated gold electrode. In addition, the Faradic current Imax obtained on the PACHA coated electrode (20 mA) was two times higher as compared to the Faradic current Imax of the un-modified gold electrode (10 mA). In solution of lower base concentration (0.06 M NaOH), the electrooxidation of methanol became sluggish on both electrodes, as indicated by peak shifting towards positive potential and with reduced faradaic current (at 0.74 V on PACHA coated electrode; Imax 10 mA). The electrooxidation of methanol at both lower and higher electrode potentials was analyzed mechanistically and discussed in light of the literature. EIS results were interpreted using Nyquist and Bode plots. The charge transfer resistance was decreased and pseudo-capacitive behavior changed to conductive behavior when external applied potential was increased from 0.1 V to 0.4 V.

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Section: Electro Oxidation Of Methanol On Pacha Coated Goldmentioning

confidence: 89%

Performance Improvement of Gold Electrode towards Methanol Electrooxidation in Akaline Medium: Enhanced Current Density Achieved with Poly(aniline-co-2-hydroxyaniline) Coating at Low Overpotential

et al. 2022

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“…The continued reduction of fossil fuels together with the more stringent environmental protection legislation has been the focal point for the search for alternative energy sources. Fuel cell technology has obtained increasing attention as it can directly convert chemical energy from fuel into electrical energy, without combustion, at high efficiency and low pollution . Recently, direct alcohol fuel cells (DAFCs) have attracted enormous attention for their high energy density, efficiency, simple operation at room temperature and simple storage of liquid fuels and fuel purification .…”

Section: Methodsmentioning

confidence: 99%

Glycerol and Methanol Electro‐oxidation at Pt/C‐ITO under Alkaline Condition

et al. 2016

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Thec ontinued reduction of fossil fuels together with the more stringent environmental protection legislation has been the focal point for the search for alternative energy sources. Fuel cell technology has obtained increasing attention as it can directly convert chemical energy from fuel into electrical energy,w ithout combustion, at high efficiencya nd low pollution [1,2].R ecently,d irect alcohol fuel cells (DAFCs)h ave attracted enormous attentionf or their high energy density,e fficiency, simple operation at room temperature and simple storage of liquid fuels and fuel purification [ 3,4].DAFCs efficiencies are vary according to specific characteristics,b eing the choice of the fuel, anode catalyst and, corresponding catalyst support of utmost importance [5,6].T hese characteristics makea lcohols attractive liquid fuels for the majorityo fp romising alternative power sources for transportation, portable electronics and stationary applications [7].T he most common DAFC is the direct methanolf uel cell (DMFC) and severalw orks in the recent years have been performed on the electron oxidation of methanol [8] and ethanol [9][10][11].Recently,g lycerol has emerged as ap otential fuel to feed anodes of DAFCs,d irect glycerolf uel cell (DGFC), due to its high theoretical energya nd availability,s ince it is am assive co-product of biodiesel fabrication [12].I mproved alcohol oxidation kinetics in the electrolyte can also be facilitated in the alkalinem edia rather than in the acid media. This can help to overcomet he kineticc onstraintsi nt he alcohol oxidation for operating DAFCs [13,14].O ne of the most criticalp oints of DAFCs performance are the electrocatalysts,d ue to this,m uch effort has been devoted to the development of new materials in order to overcome this problem.Pt-basede lectrocatalysts are the most universal type applied in DAFCs because they have high catalytica ctivity,g ood chemical stability and large currentd ensity.A lthough, theya lso have certain limitations such as high cost, easy poisoning by the adsorbed reaction intermediates [3],a mong other factors.A nother approachf or improving the Pt efficiency has been the search of different support materials that may be appliedf or electrocatalysts synthesis.C arbon nanomaterials with several shapesa nd structures such as nanostructured, carbon black, carbon nanofibers,m esoporousc arbon and carbon nanotubes, have been used as support for metal nanoparticles improving their electrocatalytic performance [15].OrdóÇez et al. [16] prepared aP te lectrocatalyst supported ontom ulti-walled carbon nanotubes (MWCNTs) for direct ethanol fuel cell (DEFC)a pplication. Thea uthors described that CNTsi ncreased the activity of the Pt electrocatalyst and, in as ingle fuel cell tests occurred Abstract:Aphysical mixture composed by carbon Vulcan XC 72 and indiumt in oxide( ITO) with different ratios (85 :15; 50 :50; 85 :15) was used as support for platinum nanoparticles synthesis by borohydride reduction method. Thecharacterization of thiselectrocatalyst was pe...

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“…[92][93][94] Despite the excellent catalytic performance and superior acid and alkali resistance, the large-scale application of Pt is still limited due to its high cost and rare properties. [95][96][97][98][99][100] To solve the problems mentioned above, the strategies of reducing the size of Pt particles and the metallic Pt content, [100][101][102] synthesizing optimized morphologies and structures, [103][104][105][106] employing suitable support materials 34,[107][108][109][110][111][112] and alloying with other metals [113][114][115][116] have been widely studied in recent years.…”

Section: Electrochemical Glycerol Oxidation Reactionmentioning

confidence: 99%

“…Various promising support materials have been developed, such as carbon (e.g., carbon nanowires, carbon black, carbon nanofoam, carbon fibers (graphite fiber), carbon nanospheres, carbon nanotubes, honeycomb-like carbon, bamboo-like carbon (BCNTs), multi-walled carbon nanotube (MWCNT), 126 single-walled carbon nanohorns (SWCNHs), 127 diamond-like carbon, graphene), conductive polymers (e.g., polyaniline (PANI), 102 poly(3,4-ethylenedioxythiphene) (PEDOT), 128 poly ( phthalazinone ether ketone) (PPEK-SH) 129 ), metal oxides (e.g., CeO 2 , 130 MnO x , 131 IrO x 132 ), mesoporous silica, etc., which were widely used as supports for metals and metal alloys. For example, Lee and co-workers prepared highly-dispersed Pt nanoclusters on microporous three-dimensional (3D) graphene-like carbon (3D-GLC) for the GOR, which had a high surface area (ca.…”

Section: Electrochemical Glycerol Oxidation Reactionmentioning

confidence: 99%

Recent developments in electrode materials for the selective upgrade of biomass-derived platform molecules into high-value-added chemicals and fuels

Fan

Zhang

et al. 2022

Green Chem.

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Fabrication of Pt/porous PANI using attapulgite as template for electro-oxidation of glycerol

Cited by 22 publications

References 51 publications

Performance Improvement of Gold Electrode towards Methanol Electrooxidation in Akaline Medium: Enhanced Current Density Achieved with Poly(aniline-co-2-hydroxyaniline) Coating at Low Overpotential

Performance Improvement of Gold Electrode towards Methanol Electrooxidation in Akaline Medium: Enhanced Current Density Achieved with Poly(aniline-co-2-hydroxyaniline) Coating at Low Overpotential

Glycerol and Methanol Electro‐oxidation at Pt/C‐ITO under Alkaline Condition

Recent developments in electrode materials for the selective upgrade of biomass-derived platform molecules into high-value-added chemicals and fuels

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