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

H. Erikson; A. Sarapuu; N. Alexeyeva; K. Tammeveski; J. Solla-Gullón; J. M. Feliu

doi:10.1016/j.electacta.2011.10.074

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

H. Erikson
, A. Sarapuu
, N. Alexeyeva
, K. Tammeveski^*
, J. Solla-Gullón
, J. M. Feliu

^*Corresponding author for this work

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

151 Citations (Scopus)

Abstract

The electrocatalytic properties of cubic palladium nanoparticles towards the electrochemical reduction of oxygen were studied in acid and alkaline solutions and compared with those of spherical nanoparticles and bulk Pd. The synthesised Pd nanoparticles were characterised by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Electrooxidation of pre-adsorbed CO was employed for cleaning the palladium catalyst surface. Oxygen reduction was studied using the rotating disk electrode (RDE) method and enhanced electrocatalytic activity of Pd nanocubes was revealed both in acid and alkaline solutions, which was attributed to the prevalence of Pd(1 0 0) facets. The mechanism of oxygen reduction on Pd nanoparticles was similar to that on bulk Pd, the first electron transfer being the rate-limiting step, and the reaction predominantly followed a four-electron pathway in both solutions.

Original language	English
Pages (from-to)	329-335
Number of pages	7
Journal	Electrochimica Acta
Volume	59
DOIs	https://doi.org/10.1016/j.electacta.2011.10.074
Publication status	Published - 1 Jan 2012
Externally published	Yes

Keywords

Electrocatalysis
Oxygen reduction
Palladium nanocubes
Palladium nanoparticles
Pd-based catalysts

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10.1016/j.electacta.2011.10.074

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title = "Electrochemical reduction of oxygen on palladium nanocubes in acid and alkaline solutions",

abstract = "The electrocatalytic properties of cubic palladium nanoparticles towards the electrochemical reduction of oxygen were studied in acid and alkaline solutions and compared with those of spherical nanoparticles and bulk Pd. The synthesised Pd nanoparticles were characterised by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Electrooxidation of pre-adsorbed CO was employed for cleaning the palladium catalyst surface. Oxygen reduction was studied using the rotating disk electrode (RDE) method and enhanced electrocatalytic activity of Pd nanocubes was revealed both in acid and alkaline solutions, which was attributed to the prevalence of Pd(1 0 0) facets. The mechanism of oxygen reduction on Pd nanoparticles was similar to that on bulk Pd, the first electron transfer being the rate-limiting step, and the reaction predominantly followed a four-electron pathway in both solutions.",

keywords = "Electrocatalysis, Oxygen reduction, Palladium nanocubes, Palladium nanoparticles, Pd-based catalysts",

author = "H. Erikson and A. Sarapuu and N. Alexeyeva and K. Tammeveski and J. Solla-Gull{\'o}n and Feliu, \{J. M.\}",

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doi = "10.1016/j.electacta.2011.10.074",

language = "English",

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TY - JOUR

T1 - Electrochemical reduction of oxygen on palladium nanocubes in acid and alkaline solutions

AU - Erikson, H.

AU - Sarapuu, A.

AU - Alexeyeva, N.

AU - Tammeveski, K.

AU - Solla-Gullón, J.

AU - Feliu, J. M.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - The electrocatalytic properties of cubic palladium nanoparticles towards the electrochemical reduction of oxygen were studied in acid and alkaline solutions and compared with those of spherical nanoparticles and bulk Pd. The synthesised Pd nanoparticles were characterised by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Electrooxidation of pre-adsorbed CO was employed for cleaning the palladium catalyst surface. Oxygen reduction was studied using the rotating disk electrode (RDE) method and enhanced electrocatalytic activity of Pd nanocubes was revealed both in acid and alkaline solutions, which was attributed to the prevalence of Pd(1 0 0) facets. The mechanism of oxygen reduction on Pd nanoparticles was similar to that on bulk Pd, the first electron transfer being the rate-limiting step, and the reaction predominantly followed a four-electron pathway in both solutions.

AB - The electrocatalytic properties of cubic palladium nanoparticles towards the electrochemical reduction of oxygen were studied in acid and alkaline solutions and compared with those of spherical nanoparticles and bulk Pd. The synthesised Pd nanoparticles were characterised by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Electrooxidation of pre-adsorbed CO was employed for cleaning the palladium catalyst surface. Oxygen reduction was studied using the rotating disk electrode (RDE) method and enhanced electrocatalytic activity of Pd nanocubes was revealed both in acid and alkaline solutions, which was attributed to the prevalence of Pd(1 0 0) facets. The mechanism of oxygen reduction on Pd nanoparticles was similar to that on bulk Pd, the first electron transfer being the rate-limiting step, and the reaction predominantly followed a four-electron pathway in both solutions.

KW - Electrocatalysis

KW - Oxygen reduction

KW - Palladium nanocubes

KW - Palladium nanoparticles

KW - Pd-based catalysts

UR - https://www.scopus.com/pages/publications/84655163493

U2 - 10.1016/j.electacta.2011.10.074

DO - 10.1016/j.electacta.2011.10.074

M3 - Article

AN - SCOPUS:84655163493

SN - 0013-4686

VL - 59

SP - 329

EP - 335

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

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

Abstract

Keywords

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