Kinetics of oxygen reduction reaction on nanosized Pd electrocatalyst in acid media

Salvador-Pascual, José J.; Citalán-Cigarroa, S.; Solorza‐Feria, O.

doi:10.1016/j.jpowsour.2007.05.093

Cited by 133 publications

(89 citation statements)

References 28 publications

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“…Experiments were carried out at room temperature (20 ± 1°C). Under these experimental conditions, the concentration of the dissolved oxygen in 0.5 M H 2 SO 4 solution is 1.1 9 10 -6 M, according to the literature [31,32].…”

Section: Reagents and Instrumentsmentioning

confidence: 96%

A novel nanocomposite of Pd nanocluster/poly(N-acetylaniline) nanorod modified electrode for the electrocatalytic reduction of oxygen

Jiang

Lin

2008

J Appl Electrochem

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A novel nanocomposite of palladium nanoclusters/poly(N-acetylaniline) nanorods was electrodeposited on to a glassy carbon electrode by cyclic voltammetry (CV). This electrode, Pd/PAANI/GCE, was characterized by Xray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), CV and chromoamperometry. It was demonstrated that the ball-shaped Pd nanoclusters were mainly growing on the ends of the nanorods, forming a novel nanocomposite. The preliminary study also demonstrated that the electrode modified with this nanocomposite matrix had high electrocatalytic activity toward 4-e -oxygen reduction.

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Section: Reagents and Instrumentsmentioning

confidence: 96%

A novel nanocomposite of Pd nanocluster/poly(N-acetylaniline) nanorod modified electrode for the electrocatalytic reduction of oxygen

Jiang

Lin

2008

J Appl Electrochem

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“…The reaction mechanism includes multi-electron reduction in aqueous solution proceeding in two overall pathways depending on electrode material and solution pH [1][2][3][4][5]. Bare electrode surfaces generally induce oxygen reduction via a twoelectron reduction process at two different potentials.…”

Section: Introductionmentioning

confidence: 99%

“…Over the last decade, electrode surfaces have been frequently modified with ad-metals [17,18] or metal nanoparticles [4,19,20] which often showed good catalytic properties and prompted a change in the reaction pathway to a four-electron reduction of oxygen. The contribution of various ad-metals in particular, Bi, Tl, Pb, Ag and Cu, to the electrocatalytic activity of Au(111) electrode was found to be efficient for oxygen reduction [21,22].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of Oxygen on a Pd Ad-Layer Modified Au(111) Electrode in Alkaline Solution

et al. 2009

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Oxygen reduction was studied on palladium, cadmium and zinc ad-atom modified single crystal Au (111) electrodes. The electrodes were modified by underpotential deposition process and their activity towards oxygen reduction was studied in alkaline media by voltammetry. The reduction peaks obtained were compared with those of bare Au (111), Pd disc and bulk deposited Cd electrodes. Enhanced catalytic activity of the Au(111) electrode in the presence of Pd, Cd and Zn ad-layer can be attributed to a change in surface charge and energy by ad-layer formation. In oxygen saturated medium a well defined sharp reduction peak was observed at -0.12 V for 1/5 ML Pd ad atom modified Au(111) electrode while it was positioned at -0.18 V on a Pd disk electrode. The best shift in reduction peak potential was obtained with 2/5 ML Pd ad atom modified Au(111) electrode with similar current density of Pd disc electrode.

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“…Cyclic voltammetry (CV) and rotating disk electrode (RDE) measurements were conducted on a thin film catalysts deposited on a RDE0008 glassy carbon disk electrode (0.19 cm 2 ). The glassy carbon working electrode disk was prepared according to a method reported previously (8). A thin film was deposited from a solution prepared by adding 8 µl of a resulting suspension from a mixture of 50 µl of an alcoholic solution containing 5 µl of Nafion ® (5 wt.%, Du Pont, 1000 EW) and 1 mg of Pd/TTC (10 wt.%/C).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Electrochemical Characterization of Palladium Supported in Thermally Treated Carbon for Oxygen Reduction Reaction in Acid Media

2009

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In proton exchange membrane fuel cell (PEMFC), the low interaction between the electrocatalyst and the support has been subjected of an intensive research in last years. The low interaction arises by a decreased contact between the support and the nano sized catalyst. In this paper the palladium supported in thermally treated carbon (Pd/TTC) was synthesized via the NaBH 4 reduction of the PdCl 2 precursor at 60°C. The supporting carbon was thermally treated at 200 o C, 400 o C, 600 o C and 800 o C. Structural characterization of the TTC was examined by Raman spectroscopy and the Pd/TTC morphology by SEM. Electrocatalyst activity for the oxygen reduction reaction was investigated by cyclic and linear voltammetry in 0.5M H 2 SO 4 at 25°C. The resulted Pd/TTC at 400°C and 600 o C showed significantly higher activity following kinetics of four electrons transfer to water formation. This behavior is attributed to structural properties and superficial conditions of the supporting carbon.The fuel cell technology has entered in a fast growth of new phase of research, due fundamentally to its potential application as clean energy source for mobile and stationary devices. At present, one of the main challenges is to reduce the fuel cell cost by developing low-cost materials and components, which includes oxygen reduction catalysts, solid polymer membranes, gas diffusion electrodes and bipolar plates. The low interaction between noble metals (Pt, Pd, Ru, etc.) and supporting carbon, in the proton exchanger membrane fuel cell (PEMFC), has received increasing attention in the last years. Specifically, the cathode side with its high acidity, electrochemical potential, water content, and oxygen concentration provides high demands on the supporting catalyst material (1-4). Catalyst support degradation in the gas diffusion electrode (GDE) results in a decreased contact between the support and the palladium catalyst nanoparticles, which consequently favored the mobility and might form larger Pd aggregates or migrate out of the gas diffusion electrode. It can also cause increased hydrophilicity of the supporting carbon, which results in deteriorated mass-transport properties of the GDE. The Vulcan carbon ® (VC) is used as catalyst supporting material, it has unique properties because of some superficial groups, amorphous structure and nanometric size (1,5). In this paper the palladium supported in thermally treated carbon (Pd/TTC) was synthesized and electrochemically characterized to obtain its activity and stability towards oxygen reduction reaction (ORR) in acid media.

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Kinetics of oxygen reduction reaction on nanosized Pd electrocatalyst in acid media

Cited by 133 publications

References 28 publications

A novel nanocomposite of Pd nanocluster/poly(N-acetylaniline) nanorod modified electrode for the electrocatalytic reduction of oxygen

A novel nanocomposite of Pd nanocluster/poly(N-acetylaniline) nanorod modified electrode for the electrocatalytic reduction of oxygen

Electrocatalytic Reduction of Oxygen on a Pd Ad-Layer Modified Au(111) Electrode in Alkaline Solution

Electrochemical Characterization of Palladium Supported in Thermally Treated Carbon for Oxygen Reduction Reaction in Acid Media

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