The particle proximity effect: from model to high surface area fuel cell catalysts

József Spéder; Lena  Altmann; Marcus Baeumer; Jacob Judas Kain Kirkensgaard; Kell Mortensen; Matthias Arenz

doi:10.1039/c4ra00261j

The particle proximity effect: from model to high surface area fuel cell catalysts

József Spéder, Lena Altmann, Marcus Baeumer, Jacob Judas Kain Kirkensgaard, Kell Mortensen, Matthias Arenz

57 Citationer (Scopus)

Abstract

In this work, Pt nanoparticles prepared by a colloidal method are supported on high surface area carbons. The electrocatalysts synthesized by this method have well-separated, size-controlled nanoparticles with tunable interparticle distance, and thus enable the examination of the particle proximity effect on the oxygen reduction reaction (ORR). The particle proximity effect proposes that the activity of fuel cell catalysts depends on the distance between the catalyst particles and is here for the first time demonstrated for high surface area catalysts; i.e. catalysts which can be used in fuel cells. Based on rotating disk electrode (RDE) experiments, we show that the kinetic current density of ORR depends on the distance between the neighboring nanoparticles, i.e. the ORR activity increases with decreasing interparticle distance.

Originalsprog	Engelsk
Tidsskrift	R S C Advances
Vol/bind	4
Udgave nummer	29
Sider (fra-til)	14971-14978
Antal sider	8
ISSN	2046-2069
DOI	https://doi.org/10.1039/c4ra00261j
Status	Udgivet - 2014

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10.1039/c4ra00261j

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title = "The particle proximity effect: from model to high surface area fuel cell catalysts",

abstract = "In this work, Pt nanoparticles prepared by a colloidal method are supported on high surface area carbons. The electrocatalysts synthesized by this method have well-separated, size-controlled nanoparticles with tunable interparticle distance, and thus enable the examination of the particle proximity effect on the oxygen reduction reaction (ORR). The particle proximity effect proposes that the activity of fuel cell catalysts depends on the distance between the catalyst particles and is here for the first time demonstrated for high surface area catalysts; i.e. catalysts which can be used in fuel cells. Based on rotating disk electrode (RDE) experiments, we show that the kinetic current density of ORR depends on the distance between the neighboring nanoparticles, i.e. the ORR activity increases with decreasing interparticle distance.",

author = "J{\'o}zsef Sp{\'e}der and Lena Altmann and Marcus Baeumer and Kirkensgaard, {Jacob Judas Kain} and Kell Mortensen and Matthias Arenz",

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language = "English",

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T1 - The particle proximity effect

T2 - from model to high surface area fuel cell catalysts

AU - Spéder, József

AU - Altmann, Lena

AU - Baeumer, Marcus

AU - Kirkensgaard, Jacob Judas Kain

AU - Mortensen, Kell

AU - Arenz, Matthias

PY - 2014

Y1 - 2014

N2 - In this work, Pt nanoparticles prepared by a colloidal method are supported on high surface area carbons. The electrocatalysts synthesized by this method have well-separated, size-controlled nanoparticles with tunable interparticle distance, and thus enable the examination of the particle proximity effect on the oxygen reduction reaction (ORR). The particle proximity effect proposes that the activity of fuel cell catalysts depends on the distance between the catalyst particles and is here for the first time demonstrated for high surface area catalysts; i.e. catalysts which can be used in fuel cells. Based on rotating disk electrode (RDE) experiments, we show that the kinetic current density of ORR depends on the distance between the neighboring nanoparticles, i.e. the ORR activity increases with decreasing interparticle distance.

AB - In this work, Pt nanoparticles prepared by a colloidal method are supported on high surface area carbons. The electrocatalysts synthesized by this method have well-separated, size-controlled nanoparticles with tunable interparticle distance, and thus enable the examination of the particle proximity effect on the oxygen reduction reaction (ORR). The particle proximity effect proposes that the activity of fuel cell catalysts depends on the distance between the catalyst particles and is here for the first time demonstrated for high surface area catalysts; i.e. catalysts which can be used in fuel cells. Based on rotating disk electrode (RDE) experiments, we show that the kinetic current density of ORR depends on the distance between the neighboring nanoparticles, i.e. the ORR activity increases with decreasing interparticle distance.

U2 - 10.1039/c4ra00261j

DO - 10.1039/c4ra00261j

M3 - Journal article

SN - 2046-2069

VL - 4

SP - 14971

EP - 14978

JO - RSC Advances

JF - RSC Advances

IS - 29

ER -

The particle proximity effect: from model to high surface area fuel cell catalysts

Abstract

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