Enhanced electrocatalytic activity of cubic Pd nanoparticles towards the oxygen reduction reaction in acid media

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

doi:10.1016/j.elecom.2011.04.024

Cited by 108 publications

(84 citation statements)

References 22 publications

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“…This is in agreement with previous studies of O 2 reduction on Pd and Pt catalysts in acid media [11,18,[25][26][27].…”

Section: Accepted M Manuscriptsupporting

confidence: 82%

“…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: 62%

“…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%

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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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“…This is in agreement with previous studies of O 2 reduction on Pd and Pt catalysts in acid media [11,18,[25][26][27].…”

Section: Accepted M Manuscriptsupporting

confidence: 82%

Section: Accepted M Manuscriptsupporting

confidence: 62%

See 1 more Smart Citation

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

Jukk

Kongi

Tammeveski

et al. 2015

Electrochemistry Communications

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“…As the surface of cubic Pd particles is mostly composed of Pd(100) facets [4], it is expected that Pd nanocubes would efficiently catalyse the ORR. Indeed, in several studies Pd nanocubes have been prepared and their ORR activity has been evaluated in sulphuric acid [4][5][6][7], perchloric acid [7,8] and in potassium hydroxide [4,9] solutions. Previously we have shown that cubic Pd nanoparticles (PdNPs) have about three to four times higher specific activity than that of spherical PdNPs in acid [5] and in alkaline media [4].…”

Section: Introductionmentioning

confidence: 99%

Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions

Erikson

Lüsi

Sarapuu

et al. 2016

Electrochimica Acta

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Please cite this article as: Heiki Erikson, Madis Lüsi, Ave Sarapuu, Kaido Tammeveski, Jose Solla-Gullón, Juan M.Feliu, Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions, Electrochimica Acta http://dx.doi.org/10.1016/j.electacta. 2015.11.125 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions Highlights• Carbon-supported Pd nanocubes of three different size and loading were prepared• The specific activity for oxygen reduction reaction is independent of Pd content• Pd nanocubes possess higher specific activity for ORR than spherical Pd nanoparticles• The ORR on carbon-supported Pd nanocubes proceed mainly via 4-electron pathway• Tafel behaviour of ORR on carbon-supported Pd nanocubes is similar to that of bulk Pd AbstractThe oxygen reduction reaction (ORR) was studied on carbon-supported cubic palladium nanoparticles of different sizes (~30 nm, ~10 nm and ~7 nm). Cetyltrimethylammonium bromide (CTAB) and polyvinylpyrrolidone (PVP) were used as capping agents to prepare the nanocubes and Pd content in the catalyst samples was 20 and 50 wt%. The surface morphology of the prepared materials was studied by transmission electron microscopy (TEM). The catalyst materials were electrochemically characterised by cyclic voltammetry and CO stripping experiments. The rotating disk electrode (RDE) method was employed for ORR studies in 0.5 M H 2 SO 4 and 0.1 M HClO 4 solutions. The ORR results revealed that the specific activity of cubic Pd nanoparticles is higher than that of spherical Pd particles and does not depend on the Pd content in the catalyst, but decreases with decreasing the size of Pd nanocubes. Mass activity of Pd nanocubes increased with decreasing the particle size. The ORR proceeds mainly via 4-electron pathway and the reaction mechanism is similar to that on bulk Pd.

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“…[7][8][9][10][11][12][13][14] The electrocatalysis of diO2 reduction on shape-controlled Pd nanoparticles has also been investigated recently. [15][16][17][18] Studies on Au single-crystal electrodes have shown that Au(100) is the most active lowindex plane for ORR in alkaline media. [19,20] The increased activity has been suggested to arise from AuOH species that facilitate stronger interaction with O 2 , HO 2 À and O 2 À .…”

Section: Introductionmentioning

confidence: 99%

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

et al. 2014

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Cubic, octahedral and quasi‐spherical (two different particle sizes) Au nanoparticles are synthesised and dispersed in a carbon‐black powder. The size and morphology of the Au nanocatalysts is confirmed by transmission electron microscopy and X‐ray diffraction. Au nanospheres are approximately 5 and 30 nm in diameter, whereas the size of Au octahedra and nanocubes is approximately 40–45 nm. The electrocatalytic activity of these carbon‐supported particles towards the oxygen reduction reaction (ORR) is studied in 0.5 M H2SO4 and 0.1 M KOH solutions by using the rotating‐disk‐electrode method. The specific activity (SA) for O2 reduction is measured, and the highest SA is observed for Au nanocubes supported on carbon. The highest mass activities are found for the smallest Au nanoparticles. Tafel analysis suggests that the mechanism of the ORR on shape‐controlled Au/C catalysts is the same as on bulk Au.

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Enhanced electrocatalytic activity of cubic Pd nanoparticles towards the oxygen reduction reaction in acid media

Cited by 108 publications

References 22 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

Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

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