Effect of oleylamine concentration on the structure and oxygen reduction activity of carbon-supported surface-Pt-enriched Pt3Au electrocatalysts

Kug Seung Lee; Hee Young Park; Young Hoon Chung; Sung Jong Yoo; Suk Woo Nam; Docheon Ahn; Nark Eon Sung; Jong Hyun Jang

doi:10.1016/j.jpowsour.2015.04.165

Effect of oleylamine concentration on the structure and oxygen reduction activity of carbon-supported surface-Pt-enriched Pt₃Au electrocatalysts

Kug Seung Lee, Hee Young Park, Young Hoon Chung, Sung Jong Yoo, Suk Woo Nam, Docheon Ahn, Nark Eon Sung, Jong Hyun Jang

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

6 Citations (Scopus)

Abstract

For carbon-supported Pt-enriched Pt₃Au nanoparticles (Pt₃Au/C), the effect of oleylamine (OA) concentration during nanoparticle synthesis is investigated. When the OA concentration is increased from 0.12 mM to 1.2 mM, the particle size of Pt₃Au gradually decreased from 5.1 nm to 3.3 nm, whereas the crystal structure and surface Pt concentration are not significantly influenced. With higher OA concentration, the oxygen reduction reaction activity of the Pt₃Au/C is largely enhanced, which can be explained by the combined effect of increased specific activity and electrochemical surface area of Pt. It is experimentally confirmed using a bulk CO-oxidation technique that smaller particle size (larger OA concentration) leads to decreased OH adsorption strength, which originates from the double layer overlapping effect of closely adjacent nanoparticles.

Original language	English
Pages (from-to)	130-135
Number of pages	6
Journal	Journal of Power Sources
Volume	290
DOIs	https://doi.org/10.1016/j.jpowsour.2015.04.165
Publication status	Published - 2015 May 10

Keywords

Bulk CO oxidation
OH adsorption
Oxygen reduction reaction
PtAu nanoparticle electrocatalyst
Surfactant concentration

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2015.04.165

Cite this

@article{d3f8fec896e049e08459ed589d9ff3e2,

title = "Effect of oleylamine concentration on the structure and oxygen reduction activity of carbon-supported surface-Pt-enriched Pt3Au electrocatalysts",

abstract = "For carbon-supported Pt-enriched Pt3Au nanoparticles (Pt3Au/C), the effect of oleylamine (OA) concentration during nanoparticle synthesis is investigated. When the OA concentration is increased from 0.12 mM to 1.2 mM, the particle size of Pt3Au gradually decreased from 5.1 nm to 3.3 nm, whereas the crystal structure and surface Pt concentration are not significantly influenced. With higher OA concentration, the oxygen reduction reaction activity of the Pt3Au/C is largely enhanced, which can be explained by the combined effect of increased specific activity and electrochemical surface area of Pt. It is experimentally confirmed using a bulk CO-oxidation technique that smaller particle size (larger OA concentration) leads to decreased OH adsorption strength, which originates from the double layer overlapping effect of closely adjacent nanoparticles.",

keywords = "Bulk CO oxidation, OH adsorption, Oxygen reduction reaction, PtAu nanoparticle electrocatalyst, Surfactant concentration",

author = "Lee, {Kug Seung} and Park, {Hee Young} and Chung, {Young Hoon} and Yoo, {Sung Jong} and Nam, {Suk Woo} and Docheon Ahn and Sung, {Nark Eon} and Jang, {Jong Hyun}",

year = "2015",

month = may,

day = "10",

doi = "10.1016/j.jpowsour.2015.04.165",

language = "English",

volume = "290",

pages = "130--135",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effect of oleylamine concentration on the structure and oxygen reduction activity of carbon-supported surface-Pt-enriched Pt3Au electrocatalysts

AU - Lee, Kug Seung

AU - Park, Hee Young

AU - Chung, Young Hoon

AU - Yoo, Sung Jong

AU - Nam, Suk Woo

AU - Ahn, Docheon

AU - Sung, Nark Eon

AU - Jang, Jong Hyun

PY - 2015/5/10

Y1 - 2015/5/10

N2 - For carbon-supported Pt-enriched Pt3Au nanoparticles (Pt3Au/C), the effect of oleylamine (OA) concentration during nanoparticle synthesis is investigated. When the OA concentration is increased from 0.12 mM to 1.2 mM, the particle size of Pt3Au gradually decreased from 5.1 nm to 3.3 nm, whereas the crystal structure and surface Pt concentration are not significantly influenced. With higher OA concentration, the oxygen reduction reaction activity of the Pt3Au/C is largely enhanced, which can be explained by the combined effect of increased specific activity and electrochemical surface area of Pt. It is experimentally confirmed using a bulk CO-oxidation technique that smaller particle size (larger OA concentration) leads to decreased OH adsorption strength, which originates from the double layer overlapping effect of closely adjacent nanoparticles.

AB - For carbon-supported Pt-enriched Pt3Au nanoparticles (Pt3Au/C), the effect of oleylamine (OA) concentration during nanoparticle synthesis is investigated. When the OA concentration is increased from 0.12 mM to 1.2 mM, the particle size of Pt3Au gradually decreased from 5.1 nm to 3.3 nm, whereas the crystal structure and surface Pt concentration are not significantly influenced. With higher OA concentration, the oxygen reduction reaction activity of the Pt3Au/C is largely enhanced, which can be explained by the combined effect of increased specific activity and electrochemical surface area of Pt. It is experimentally confirmed using a bulk CO-oxidation technique that smaller particle size (larger OA concentration) leads to decreased OH adsorption strength, which originates from the double layer overlapping effect of closely adjacent nanoparticles.

KW - Bulk CO oxidation

KW - OH adsorption

KW - Oxygen reduction reaction

KW - PtAu nanoparticle electrocatalyst

KW - Surfactant concentration

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JO - Journal of Power Sources

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