Electrochemical reduction of oxygen on palladium nanocubes in acid and alkaline solutions

Erikson, Heiki; Sarapuu, Ave; Alexeyeva, Nadezda; Tammeveski, Kaido; Solla-Gullón, José; Feliu, Juan M.

doi:10.1016/j.electacta.2011.10.074

Cited by 154 publications

(148 citation statements)

References 52 publications

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“…At high overpotentials the Tafel slope value was over -130 mV, which is slightly higher than that reported for Pd and Pt electrodes in early work [25,28]. Similar slope values have been found for different Pd-and Pt-based catalysts [18,26,27,29,30].…”

Section: Accepted M Manuscriptsupporting

confidence: 61%

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PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

Jukk

Kongi

Tammeveski

et al. 2015

Electrochemistry Communications

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In this work, PdPt alloy nanocubes with different metal ratios were synthesised in the presence of polyvinylpyrrolidone (PVP). The surface morphology of the PdPt samples was characterised by transmission electron microscopy (TEM). TEM images showed that PdPt nanoparticles were cubic-shaped and the average size of the cubes was about 8-10 nm. Their electrocatalytic activity towards the oxygen reduction reaction (ORR) was studied in 0.5 M H 2 SO 4 using the rotating disk electrode method. All the alloyed catalysts showed enhanced electrocatalytic activity for ORR as compared to the monometallic cubic Pd nanoparticles.Half-wave potential values for PdPt catalysts were comparable with that of Pt nanocubes.From the alloyed catalysts Pd 36 Pt 64 exhibited the highest specific activity, which was only slightly lower than that of cubic Pt nanoparticles. The Koutecky-Levich analysis revealed that the reduction of oxygen proceeded via 4-electron pathway on all the electrocatalysts studied.

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Section: Accepted M Manuscriptsupporting

confidence: 61%

“…7 nanocubes have shown enhanced activity towards O 2 reduction in sulphuric acid solution, which has been attributed to the predominance of Pd(100) facets on nanocubes [18,29].…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

Jukk

Kongi

Tammeveski

et al. 2015

Electrochemistry Communications

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show abstract

“…The higher activity was attributed to the exposure of Pd (110) surface facet. The activity of the Pd with low index planes increased in the following order: Pd(110) < Pd(111) < Pd(100) [265][266][267]. The Pd(100) single crystal plane was even more active than Pt(110) in 0.1 M HClO4.…”

Section: Novel Nanostructuresmentioning

confidence: 81%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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This review selectively summarizes the latest developments in the Pd-based cataysts for low temperature proton exchange membrane fuel cells, especially in the application of formic acid oxidation, alcohol oxidation and oxygen reduction reaction. The advantages and shortcomings of the Pd-based catalysts for electrocatalysis are analyzed. The influence of the structure and morphology of the Pd materials on the performance of the Pd-based catalysts were described. Finally, the perspectives of future trends on Pd-based catalysts for different applications were considered.

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“…Generally, an angular and sharp metal surface is known to have higher oxygen reduction catalytic activity than a smooth and curved metal surface. 16,17 Therefore, the shift of the electrochemical oxygen reduction peak potential towards the positive direction in the flat gold surface after the ORC process can be understood as an enhancement of its catalytic activity due to the changes in the surface shape. Fig.…”

Section: Taejung Lim and Jongwon Kimmentioning

confidence: 99%

Effect of Electrochemical Oxidation-Reduction Cycles on Surface Structures and Electrocatalytic Oxygen Reduction Activity of Au Electrodes

Lim¹,

Kim²

2016

Journal of the Korean Chemical Society

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ABSTRACT. Oxidation-reduction cycling (ORC) procedures are widely used for cleaning nanoparticle surfaces when investigating their electrocatalytic activities. In this work, the effect of ORC on the surface structures and electrocatalytic oxygen reduction activity of Au electrodes is analyzed. Different structural changes and variations in electrocatalysis are observed depending on the initial structure of the Au electrodes, such as flat bulk, nanoporous, nanoplate, or dendritic Au. In particular, dendritic Au structures lost their sharp-edge morphology during the ORC process, resulting in a significant decrease in its electrocatalytic oxygen reduction activity. The results shown in this paper provide an insight into the pretreatment of nanoparticle-based electrodes during investigation of their electrocatalytic activities.

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Electrochemical reduction of oxygen on palladium nanocubes in acid and alkaline solutions

Cited by 154 publications

References 52 publications

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Effect of Electrochemical Oxidation-Reduction Cycles on Surface Structures and Electrocatalytic Oxygen Reduction Activity of Au Electrodes

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