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

Kristel Jukk; Nadezda Kongi; Kaido Tammeveski; Jose Solla-Gullón; Juan M. Feliu

doi:10.1016/j.elecom.2015.04.001

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

Kristel Jukk
, Nadezda Kongi
, Kaido Tammeveski^*
, Jose Solla-Gullón
, Juan M. Feliu

^*Corresponding author for this work

University of Tartu
University of Alicante

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

Abstract 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 H₂SO₄ using the rotating disc 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 Pd₃₆Pt₆₄ 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.

Original language	English
Article number	5423
Pages (from-to)	11-15
Number of pages	5
Journal	Electrochemistry Communications
Volume	56
DOIs	https://doi.org/10.1016/j.elecom.2015.04.001
Publication status	Published - 1 Jul 2015
Externally published	Yes

Keywords

Bimetallic catalysts
Electrocatalysis
Oxygen reduction
PdPt alloy nanoparticles
Shape-controlled nanocubes

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10.1016/j.elecom.2015.04.001

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@article{213704991eb34b1d9d32f97b5978af64,

title = "PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media",

abstract = "Abstract 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 H2SO4 using the rotating disc 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 Pd36Pt64 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.",

keywords = "Bimetallic catalysts, Electrocatalysis, Oxygen reduction, PdPt alloy nanoparticles, Shape-controlled nanocubes",

author = "Kristel Jukk and Nadezda Kongi and Kaido Tammeveski and Jose Solla-Gull{\'o}n and Feliu, \{Juan M.\}",

year = "2015",

month = jul,

day = "1",

doi = "10.1016/j.elecom.2015.04.001",

language = "English",

volume = "56",

pages = "11--15",

journal = "Electrochemistry Communications",

issn = "1388-2481",

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TY - JOUR

T1 - PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

AU - Jukk, Kristel

AU - Kongi, Nadezda

AU - Tammeveski, Kaido

AU - Solla-Gullón, Jose

AU - Feliu, Juan M.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Abstract 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 H2SO4 using the rotating disc 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 Pd36Pt64 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.

AB - Abstract 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 H2SO4 using the rotating disc 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 Pd36Pt64 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.

KW - Bimetallic catalysts

KW - Electrocatalysis

KW - Oxygen reduction

KW - PdPt alloy nanoparticles

KW - Shape-controlled nanocubes

UR - https://www.scopus.com/pages/publications/84927722790

U2 - 10.1016/j.elecom.2015.04.001

DO - 10.1016/j.elecom.2015.04.001

M3 - Article

AN - SCOPUS:84927722790

SN - 1388-2481

VL - 56

SP - 11

EP - 15

JO - Electrochemistry Communications

JF - Electrochemistry Communications

M1 - 5423

ER -

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

Abstract

Keywords

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