Electrocatalytic H2O2 amperometric detection using gold nanotube electrode ensembles

Delvaux, Marc; Walcarius, Alain; Demoustier‐Champagne, Sophie

doi:10.1016/j.aca.2004.08.054

Cited by 91 publications

(77 citation statements)

References 47 publications

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“…Pervious reports on the oxidation of H 2 O 2 upon several modified electrodes depicted relatively high over potential (e.g., 0.7 V vs. SCE at Pt electrode), which makes the electrode sensitive to interferences from many electro active species such as ascorbic acid and uric acid. 31 In the present study, the silver nanoparticles stabilized on both Ag/SBA-15/TEPA and Ag/SBA-15/TAEA play similar role in increasing or decreasing the over potential. Furthermore, the nature of amine compound either secondary or primary amine present in the TAEA and TEPA influences the reduction current.…”

Section: Resultssupporting

confidence: 52%

Electrocatalytic Reduction of Hydrogen Peroxide on Silver Nanoparticles Stabilized by Amine Grafted Mesoporous SBA-15

Vinoba¹,

Jeong²,

Bhagiyalakshmi³

et al. 2010

Bulletin of the Korean Chemical Society

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Mesoporous SBA-15 was synthesized using tetraethylorthosilicate (TEOS) as the silica source and Pluronic (P123) as the structure-directing agent. The defective Si-OH groups present in SBA-15 were successively grafted with 3-chloropropyltrimethoxysilane (CPTMS) followed by tris-(2-aminoethyl) amine (TAEA) and/or tetraethylenepentamine (TEPA) for effective immobilization of silver nanoparticles. Grafting of TAEA and/or TEPA amine and immobilization of silver nanoparticles inside the channels of SBA-15 was verified by XRD, TEM, IR and BET techniques. The silver nanoparticles immobilized on TAEA and /or TEPA grafted SBA-15 was subjected for electrocatalytic reduction of hydrogen peroxide (H2O2). The TEPA stabilized silver nanoparticles show higher efficiency for reduction of H2O2 than that of TAEA, due to higher number of secondary amine groups present in TEPA. The amperometric analysis indicated that both the Ag/SBA-15/TAEA and Ag/SBA-15/TEPA modified electrodes required lower over-potential and hence possess high sensitivity towards the detection of H2O2. The reduction peak currents were linearly related to hydrogen peroxide concentration in the range between 3 × 10 -4 M and 2.5 × 10 -3 M with correlation coefficient of 0.997 and detection limit was 3 × 10 -4 M.

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Section: Resultssupporting

confidence: 52%

Electrocatalytic Reduction of Hydrogen Peroxide on Silver Nanoparticles Stabilized by Amine Grafted Mesoporous SBA-15

Vinoba¹,

Jeong²,

Bhagiyalakshmi³

et al. 2010

Bulletin of the Korean Chemical Society

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“….T he presented NT catalyst with its uniquem orphology clearly surpasses previously reported Au NT systemsc reated by electroless plating such as templatesupported Au NTs( 420 mAmm À1 cm À2 ) [48] and porous Au NTs (770 mAmm À1 cm…”

Section: à2supporting

confidence: 58%

“…[13,34,[48][49][50] The working electrode was prepared by attaching as quare-shaped piece of the template-freed Au NT network (3.5 mm 3.5 mm) on ag lassy carbon electrode using carbon paste. The carbon paste was fabricated according to ap reviously published study, [50] using ultrapure componentsi n order to minimize electrochemical response.…”

Section: Resultsmentioning

confidence: 99%

“…Compared to the oxidation reaction, peroxider eduction This result is in agreement with previousr eports for Au NTs. [48] Because of the favorable kinetics, amperometry was performed in the peroxide reduction region. The potential was adjusted to the value at which previouse lectrosensinge xperiments with Au NTs [48] showedt he highest sensitivity (À0.5 V vs. Ag j AgCl).…”

Section: Resultsmentioning

confidence: 99%

“…[34] Due to the self-supporting structure of the interconnected NTs, the polymer template can be removed prior to the electrochemical measurements, while in other cases the template is left intact to stabilize the individual1 D nanoobjects. [48,52] As at rade-off, this additional stabilization seals the nanostructures on the outside, thus reducingt he system's surface area andp orosity.I nt he absence of the template matrix, the high density of NTsi nt he network also adds to its large electrochemically active surface. The sensitivity of the Au NT network also surpassest hat of awide range of solid 1D catalysts (e.g.…”

Section: à2mentioning

confidence: 99%

See 2 more Smart Citations

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

et al. 2015

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We present a versatile approach for the fabrication of well‐defined networks of interconnected metal nanotubes, which applies electroless plating to ion‐track‐etched polymer templates that enclose designed pore networks. In order to obtain self‐supporting structures, the deposition reactions must be optimized to yield conformal nanoscale metal films on microstructured substrates possessing extensive inner surfaces. Using this route, gold, copper, silver, nickel, and platinum nanotube networks are synthesized. The resulting structures can be handled macroscopically and combine a large surface area with continuous mass transport and conduction pathways, rendering them promising for application in, for example, electrocatalysis and sensing. This potential is demonstrated by employing a gold nanotube network for the amperometric detection of hydrogen peroxide, in which excellent sensitivity, catalyst utilization, and stability is achieved.

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Electrospun Palladium Nanoparticle‐Loaded Carbon Nanofibers and Their Electrocatalytic Activities towards Hydrogen Peroxide and NADH

Huang

Wang

Hou

et al. 2008

Adv Funct Materials

287

161

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Palladium nanoparticle‐loaded carbon nanofibers (Pd/CNFs) were synthesized by the combination of electrospinning and thermal treatment processes. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images show that spherical Pd nanoparticles (NPs) are well‐dispersed on the surfaces of CNFs or embedded in CNFs. X‐ray diffraction (XRD) pattern indicates that cubic phase of Pd was formed during the reduction and carbonization processes, and the presence of Pd NPs promoted the graphitization of CNFs. This nanocomposite material exhibited high electric conductivity and accelerated the electron transfer, as verified by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The Pd/CNF‐modified carbon paste electrode (Pd/CNF‐CPE) demonstrated direct and mediatorless responses to H2O2 and NADH at low potentials. The analytical performances of the Pd/CNF‐CPEs towards reduction of H2O2 and oxidation of NADH were evaluated. The high sensitivity, wider linear range, good reproducibility, and the minimal surface fouling make this Pd/CNF‐CPE a promising candidate for amperometric H2O2 or NADH sensor.

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Electrocatalytic H2O2 amperometric detection using gold nanotube electrode ensembles

Cited by 91 publications

References 47 publications

Electrocatalytic Reduction of Hydrogen Peroxide on Silver Nanoparticles Stabilized by Amine Grafted Mesoporous SBA-15

Electrocatalytic Reduction of Hydrogen Peroxide on Silver Nanoparticles Stabilized by Amine Grafted Mesoporous SBA-15

Self‐Supporting Metal Nanotube Networks Obtained by Highly Conformal Electroless Plating

Electrospun Palladium Nanoparticle‐Loaded Carbon Nanofibers and Their Electrocatalytic Activities towards Hydrogen Peroxide and NADH

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