Electrocatalytic oxidation of formaldehyde on palladium nanoparticles supported on multi-walled carbon nanotubes

Gao, Guoyu; Guo, Dao‐Jun; Li, Hu‐Lin

doi:10.1016/j.jpowsour.2006.07.057

Cited by 102 publications

(72 citation statements)

References 32 publications

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“…14 Pd nanoparticles modified electrodes have been utilized for the electrocatalytic oxidation process of some compounds. [15][16][17][18][19] Curcumin (1,7-bis[4-hydroxy-3-methoxyphenyl]-1,6-heptadiene-3,5-dione) is the main constituent of the perennial herb Curcuma loga (known as turmeric, see Scheme 1). 20 It has a wide spectrum of pharmacological activities, including antioxidant, 21 anti-inflammatory, 22 antitumor, 23 and anticardiovasculopathic properties.…”

Section: Introductionmentioning

confidence: 99%

A Newly Developed Electrocatalytic Oxidation and Voltammetric Determination of Curcumin at the Surface of PdNp-graphite Electrode by an Aqueous Solution Process with Al3+

Çakır¹,

Bíçer²,

Arslan³

2015

Croat. Chem. Acta

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Abstract. In the first stage, the palladium nanoparticles (PdNps)-coated graphite electrode (PdNp/GE) has been prepared. Scanning electron microscopy (SEM) technique showed that the palladium nanoparticles were uniformly distributed with an average particle diameter of 60-75 nm. And then, a novel-modified electrode has been developed by the physical deposition of Al 3+ ions on palladium nanoparticles (PdNps)-coated graphite electrode (Al 3+ /PdNp/GE). This modified electrode was characterized by square-wave voltammetry (SWV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The sensitivities of PdNp/GE and Al 3+ /PdNp/GE electrodes were tested with dopamine. Al 3+ /PdNp/GE exhibited a catalytic activity for curcumin oxidation. The square-wave voltammogram of curcumin in phosphate buffer (pH = 2) gave an anodic peak at 0.56 V. The anodic peak current of curcumin was found to be linearly related to its concentration in the range of 3.0 × 10 -8 M to 6.0 × 10 -7 M with a detection limit of 2.2  10 -8 M. It was also found that the novel Al 3+ /PdNp/GE electrode had the best sensitivity when compared to glassy carbon electrode (GCE), hanging mercury drop electrode (HMDE) and glassy carbon electrode electropolymerized with acid chrome blue K (poly-ACBK/GCE), used for the determination of curcumin. The curcumin was detected in marketed spices sample of turmeric powder. Pure turmeric powder had the highest curcumin concentration, averaging 4.317 ± 0.175 % by weight.

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Section: Introductionmentioning

confidence: 99%

A Newly Developed Electrocatalytic Oxidation and Voltammetric Determination of Curcumin at the Surface of PdNp-graphite Electrode by an Aqueous Solution Process with Al3+

Çakır¹,

Bíçer²,

Arslan³

2015

Croat. Chem. Acta

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“…Initial electro-nucleation studies are important as it provides a mechanistic study with simple approach that can be used to approximate the actual initial nucleation without the help of expensive instruments such as atomic force microscopy and other nano-imaging tools. Palladium is a well known catalyst for many reactions such as electrocatalytic oxidation of formaldehyde [37,38], hydrogenation of unsaturated hydrocarbons [39], oxidation of alcohols, and is routinely used in the automobile industry in catalytic converters to reduce the amounts of nitrogen oxides, carbon monoxide, and un-burned hydrocarbons [40]. Palladium is used in electronic industry, in view of its excellent resistance to corrosion and wear, good solderability and lower density, in the development of biosensors, and has been exploited as a component in an enzymatic glucose biosensor [41] as well as for detection of catecholamine [42] and DNA [43].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Initial Electronucleation Mechanism of Palladium on Glassy Carbon Electrode

Alemu¹,

Assresahegn²,

Soreta³

2014

Port. Electrochim. Acta

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Electrochemical metal nucleation is the method for the formation of metal nanoparticles on the electrode surface. Studying the early stage of electronucleation is simpler than other methods as the driving force for nucleation is achieved by changing deposition potentials and concentration of metal ions. In this work, the potential step electrochemical deposition of palladium was studied from its chloride solution at room temperature on glassy carbon electrode surface. The nucleation mechanism was studied by analysis of the resulting current transients. Accordingly, the initial electro-nucleation mechanism of palladium nanoparticles was found to be varying depending on deposition conditions such as deposition potential and palladium concentration. It can be changed from 3D instantaneous (for all deposition potentials studied and in higher electrolytic concentration) to 3D progressive nucleation mechanism (for lower deposition potential and lower electrolytic concentration). In addition, the nucleation rate for each deposition potential as well as the concentration has been determined. The nucleation rate in this research is used to calculate the nuclei density and found to decrease from more negative deposition potential to more positive deposition potential in agreement with the observed shift in electronucleation mechanism.

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“…A key issue in catalysis is to obtain high surface area catalysts in order to enhance catalytic activity and selectivity (Ledoux and Pham-Huu 2005;Gao et al 2006). This is achieved by using support oxides of the transition metals, such as silicon dioxide, titanium dioxide, etc., which are among the most commonly used heterogeneous catalyst supports (Martínez-Méndez et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped carbon nanotubes as a metal catalyst support

et al. 2011

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The science and technology of catalysis is of fundamental importance to a national economy. Today about 90% of all technical chemicals are manufactured by the use of catalysts. Nanoparticles of noble metals are extremely important materials in the catalysis industry due to cost issues and properties that are not found in their bulk state. An efficient way to produce and stabilise noble metal nanoparticles is by dispersion on a suitable support. Carbon-based supports, such as carbon nanotubes, carbon spheres, carbon fibres, etc., have been found to be good supports for metal nanoparticles. However, to be used effectively, the carbon surface must be modified either by functionalisation or doping. This review discusses the synthesis and the possible applications of nitrogen-doped carbon nanotubes as supports for metal nanoparticles in heterogeneous catalysis.

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Electrocatalytic oxidation of formaldehyde on palladium nanoparticles supported on multi-walled carbon nanotubes

Cited by 102 publications

References 32 publications

A Newly Developed Electrocatalytic Oxidation and Voltammetric Determination of Curcumin at the Surface of PdNp-graphite Electrode by an Aqueous Solution Process with Al3+

A Newly Developed Electrocatalytic Oxidation and Voltammetric Determination of Curcumin at the Surface of PdNp-graphite Electrode by an Aqueous Solution Process with Al3+

Tuning the Initial Electronucleation Mechanism of Palladium on Glassy Carbon Electrode

Nitrogen-doped carbon nanotubes as a metal catalyst support

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